LM1117 PDF
lm1117使用说明
概述LM1117是一个低压差电压调节器系列。
其压差在1.2V输出，负载电流为800mA时为1.2V。
它与国家半导体的工业标准器件LM317有相同的管脚排列。
LM1117有可调电压的版本，通过2个外部电阻可实现1.25～13.8V输出电压范围。
另外还有5个固定电压输出（1.8V、2.5V、2.85V、3.3V和5V）的型号。
LM1117提供电流限制和热保护。
电路包含1个齐纳调节的带隙参考电压以确保输出电压的精度在±1%以内。
LM1117系列具有LLP、TO-263、SOT-223、TO-220和TO-252 D-PAK封装。
输出端需要一个至少10uF的钽电容来改善瞬态响应和稳定性。
替换型号X1117是IC网络超市自主的品牌，可以很好的替换LM1117。
X1117是一款正电压输出的低压降三端线性稳压电路，在1A输出电流下的压降为1.2V。
分为两个版本，固定电压输出版本和可调电压输出版本。
固定输出电压1.5V、1.8V、2.5V、3.3V、5.0V和可调版本的电压精度为1%；固定电压为1.2V的产品输出电压精度为2%。
内部集成过热保护和限流电路，适用于各类电子产品。
A1117是台湾亿光研发生产的高效率低压降三端线性稳压器，A1117提供电流限制和热保护，以确保芯片和功率稳定性系统。
而在芯片上保证输出电压精度在±2%。
同时也提供了固定电压输出版本和可调电压输出版本，可调版本能输出从1.25V到13.8V。
特性提供1.8V、2.5V、2.85V、3.3V、5V和可调电压的型号节省空间的SOT-223和LLP封装电流限制和热保护功能输出电流可达800mA线性调整率：0.2% (Max)负载调整率：0.4% (Max).. 温度范围－LM1117：0℃~125℃－LM1117I：-40℃~125℃应用2.85V模块可用于SCSI-2有源终端开关DC/DC转换器的主调压器高效线性调整器电池充电器电池供电装置典型应用电路图。
lm1117 芯片中文资料
TO-263
温度范围
型号
封装标识
出货形式
0℃~125℃
LM1117MPX-ADJ N03A
编带和卷轴
LM1117MPX-1.8
N12A
编带和卷轴
LM1117MPX-2.5 LM1117MPX-2.85
N13A N04A
编带和卷轴 编带和卷轴
．
LM1117MPX-3.3 LM111 1.250
1.262 1.270
LM1117-1.8
IOUT = 10mA,VIN-VOUT =3.8V, TJ = 25℃
ｆ 0≤IOUT≤800mA, 3.2V≤VIN≤10V
LM1117-2.5
． IOUT = 10mA,VIN-VOUT =4.5V, TJ = 25℃ ｗ 0≤IOUT≤800mA, 3.9V≤VIN≤10V
VREF
参考电压
LM1117I-ADJ
IOUT = 10mA,VIN-VOUT =2V, TJ = 25℃
1.238 1.250 1.262 V
10mA≤IOUT≤800mA, 1.4V≤VIN-VOUT≤ 1.200 1.250 1.290 V
VOUT
10V LM1117I-3.3
．
IOUT = 10mA,VIN-VOUT =5V, TJ = 25℃ 0≤IOUT≤800mA, 4.75V≤VIN≤10V
编带和卷轴 编带和卷轴
ｗLM1117IDTX-3.3
LM1117IDTX-5.0
LM1117IDT-3.3 LM1117IDT-5.0
编带和卷轴 编带和卷轴
ｗ 0℃~125℃
LM1117LTX-ADJ LM1117LTX-1.8
LM1117规格书
Load Regulation (Notes 2, 3) GC1117-3.3 GC1117-5.0 VIN = 4.75V, 0 ≤ IOUT ≤ 0.8A VIN = 6.5V, 0 ≤ IOUT ≤ 0.8A ∆VOUT , ∆VREF = 1%, IOUT = 0.8A (Note 4) (VIN - VOUT) = 1.5V (V IN - VOUT) = 1.5V (Note 5) (VIN - VOUT) = 1.5V 900
GENERAL DESCRIPTION
The The GC1117 series of adjustable and fixed voltage regulators are designed to provide up to0.8A outputcurrent and to operate down to 1V input-to-output differential. The dropout voltage of the device is guaranteed maximum 1.3V, decreasing at lower load currents. On-chip trimming adjusts the reference voltage to 1.5%. Current limit is set to minimize the stress under overload conditions on both the regulator and power source circuitry. The GC1117 devices are pin compatible with other t hree-terminal SCSI regulators and are offered in the low profile surface mount SOT-223 package, in the 8L SOIC package and in the TO-252 (DPAK) plastic package.
LM1117 datasheet
LM1117/LM1117I800mA Low-Dropout Linear RegulatorGeneral DescriptionThe LM1117is a series of low dropout voltage regulators with a dropout of 1.2V at 800mA of load current.It has the same pin-out as National Semiconductor’s industry standard LM317.The LM1117is available in an adjustable version,which can set the output voltage from 1.25V to 13.8V with only two external resistors.In addition,it is also available in five fixed voltages,1.8V,2.5V,2.85V,3.3V,and 5V.The LM1117offers current limiting and thermal shutdown.Its circuit includes a zener trimmed bandgap reference to as-sure output voltage accuracy to within ±1%.The LM1117series is available in LLP ,TO-263,SOT-223,TO-220,and TO-252D-PAK packages.A minimum of 10µF tantalum capacitor is required at the output to improve the transient response and stability.Featuresn Available in 1.8V,2.5V,2.85V,3.3V,5V,and Adjustable Versionsn Space Saving SOT-223and LLP Packages n Current Limiting and Thermal Protection n Output Current 800mA n Line Regulation 0.2%(Max)n Load Regulation 0.4%(Max)n Temperature Range —LM11170˚C to 125˚C —LM1117I −40˚C to 125˚CApplicationsn 2.85V Model for SCSI-2Active Termination n Post Regulator for Switching DC/DC Converter n High Efficiency Linear Regulators n Battery ChargernBattery Powered InstrumentationTypical ApplicationActive Terminator for SCSI-2Bus10091905Fixed Output Regulator10091928April 2006LM1117/LM1117I 800mA Low-Dropout Linear Regulator©2006National Semiconductor Corporation Ordering InformationPackage TemperatureRange Part Number Packaging MarkingTransport Media NSC Drawing 3-lead SOT-2230˚C to +125˚CLM1117MPX-ADJ N03A Tape and Reel MP04ALM1117MPX-1.8N12A Tape and Reel LM1117MPX-2.5N13A Tape and Reel LM1117MPX-2.85N04A Tape and Reel LM1117MPX-3.3N05A Tape and Reel LM1117MPX-5.0N06A Tape and Reel −40˚C to +125˚CLM1117IMPX-ADJ N03B Tape and Reel LM1117IMPX-3.3N05B Tape and Reel LM1117IMPX-5.0N06B Tape and Reel3-lead TO-2200˚C to +125˚CLM1117T-ADJ LM1117T-ADJ Rails T03B LM1117T-1.8LM1117T-1.8Rails LM1117T-2.5LM1117T-2.5Rails LM1117T-2.85LM1117T-2.85Rails LM1117T-3.3LM1117T-3.3Rails LM1117T-5.0LM1117T-5.0Rails 3-lead TO-2520˚C to +125˚CLM1117DTX-ADJ LM1117DT-ADJ Tape and Reel TD03B LM1117DTX-1.8LM1117DT-1.8Tape and Reel LM1117DTX-2.5LM1117DT-2.5Tape and Reel LM1117DTX-2.85LM1117DT-2.85Tape and Reel LM1117DTX-3.3LM1117DT-3.3Tape and Reel LM1117DTX-5.0LM1117DT-5.0Tape and Reel −40˚C to +125˚CLM1117IDTX-ADJ LM1117IDT-ADJ Tape and Reel LM1117IDTX-3.3LM1117IDT-3.3Tape and Reel LM1117IDTX-5.0LM1117IDT-5.0Tape and Reel 8-lead LLP0˚C to +125˚CLM1117LDX-ADJ 1117ADJ Tape and Reel LDC08A LM1117LDX-1.81117-18Tape and Reel LM1117LDX-2.51117-25Tape and Reel LM1117LDX-2.851117-28Tape and Reel LM1117LDX-3.31117-33Tape and Reel LM1117LDX-5.01117-50Tape and Reel −40˚C to 125˚CLM1117ILDX-ADJ 1117IAD Tape and Reel LM1117ILDX-3.31117I33Tape and Reel LM1117ILDX-5.01117I50Tape and Reel TO-2630˚C to +125˚CLM1117SX-ADJ LM1117SADJ Tape and Reel TS3B LM1117SX-2.85LM1117S2.85Tape and Reel LM1117SX-3.3LM1117S3.3Tape and Reel LM1117SX-5.0LM1117S5.0Tape and ReelL M 1117/L M 1117I 2Block Diagram10091901Connection DiagramsSOT-22310091904Top ViewTO-22010091902Top ViewTO-25210091938Top ViewTO-26310091944Top View10091945Side ViewLLP10091946When using the LLP packagePins2,3&4must be connected together andPins5,6&7must be connected togetherTop ViewLM1117/LM1117I3Absolute Maximum Ratings (Note 1)If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/Distributors for availability and specifications.Maximum Input Voltage (V IN to GND)20VPower Dissipation (Note 2)Internally LimitedJunction Temperature (T J )(Note 2)150˚CStorage Temperature Range -65˚C to 150˚CLead TemperatureTO-220(T)Package 260˚C,10sec SOT-223(IMP)Package 260˚C,4secESD Tolerance (Note 3)2000VOperating Ratings (Note 1)Input Voltage (V IN to GND)15VJunction Temperature Range (T J )(Note 2)LM11170˚C to 125˚C LM1117I−40˚C to 125˚CLM1117Electrical CharacteristicsTypicals and limits appearing in normal type apply for T J =25˚C.Limits appearing in Boldface type apply over the entire junc-tion temperature range for operation,0˚C to 125˚C.Symbol Parameter ConditionsMin (Note 5)Typ (Note 4)Max (Note 5)UnitsV REFReference VoltageLM1117-ADJI OUT =10mA,V IN -V OUT =2V,T J =25˚C 10mA ≤I OUT ≤800mA,1.4V ≤V IN -V OUT ≤10V1.2381.2251.2501.2501.2621.270V VV OUTOutput VoltageLM1117-1.8I OUT =10mA,V IN =3.8V,T J =25˚C 0≤I OUT ≤800mA,3.2V ≤V IN ≤10V 1.7821.746 1.8001.800 1.8181.854V V LM1117-2.5I OUT =10mA,V IN =4.5V,T J =25˚C 0≤I OUT ≤800mA,3.9V ≤V IN ≤10V 2.4752.450 2.5002.500 2.5252.550V V LM1117-2.85I OUT =10mA,V IN =4.85V,T J =25˚C 0≤I OUT ≤800mA,4.25V ≤V IN ≤10V 0≤I OUT ≤500mA,V IN =4.10V 2.8202.7902.790 2.8502.8502.850 2.8802.9102.910V V V LM1117-3.3I OUT =10mA,V IN =5V T J =25˚C 0≤I OUT ≤800mA,4.75V ≤V IN ≤10V 3.2673.235 3.3003.300 3.3333.365V V LM1117-5.0I OUT =10mA,V IN =7V,T J =25˚C 0≤I OUT ≤800mA,6.5V ≤V IN ≤12V4.9504.9005.0005.000 5.0505.100V V ∆V OUTLine Regulation (Note 6)LM1117-ADJI OUT =10mA,1.5V ≤V IN -V OUT ≤13.75V 0.0350.2%LM1117-1.8I OUT =0mA,3.2V ≤V IN ≤10V 16mV LM1117-2.5I OUT =0mA,3.9V ≤V IN ≤10V 16mVLM1117-2.85I OUT =0mA,4.25V ≤V IN ≤10V 16mV LM1117-3.3I OUT =0mA,4.75V ≤V IN ≤15V 16mV LM1117-5.0I OUT =0mA,6.5V ≤V IN ≤15V110mVL M 1117/L M 1117I 4LM1117Electrical Characteristics(Continued)Typicals and limits appearing in normal type apply for T J=25˚C.Limits appearing in Boldface type apply over the entire junc-tion temperature range for operation,0˚C to125˚C.Symbol Parameter ConditionsMin(Note5)Typ(Note4)Max(Note5)Units∆V OUT Load Regulation(Note6)LM1117-ADJV IN-V OUT=3V,10≤I OUT≤800mA0.20.4% LM1117-1.8V IN=3.2V,0≤I OUT≤800mA110mVLM1117-2.5V IN=3.9V,0≤I OUT≤800mA110mVLM1117-2.85V IN=4.25V,0≤I OUT≤800mA110mV LM1117-3.3V IN=4.75V,0≤I OUT≤800mA110mV LM1117-5.0V IN=6.5V,0≤I OUT≤800mA115mVV IN-V OUT Dropout Voltage(Note7)I OUT=100mA 1.10 1.20V I OUT=500mA 1.15 1.25V I OUT=800mA 1.20 1.30VI LIMIT Current Limit V IN-V OUT=5V,T J=25˚C80012001500mAMinimum Load Current(Note8)LM1117-ADJV IN=15V 1.75mAQuiescent Current LM1117-1.8V IN≤15V510mALM1117-2.5V IN≤15V510mALM1117-2.85V IN≤10V510mALM1117-3.3V IN≤15V510mALM1117-5.0V IN≤15V510mA Thermal Regulation T A=25˚C,30ms Pulse0.010.1%/W Ripple Regulation f RIPPLE=120Hz,V IN-V OUT=3V V RIPPLE=1V PP6075dB Adjust Pin Current60120µAAdjust Pin Current Change 10≤I OUT≤800mA,1.4V≤V IN-V OUT≤10V0.25µATemperature Stability0.5% Long Term Stability T A=125˚C,1000Hrs0.3% RMS Output Noise(%of V OUT),10Hz≤f≤10kHz0.003%Thermal Resistance Junction-to-Case 3-Lead SOT-22315.0˚C/W 3-Lead TO-220 3.0˚C/W 3-Lead TO-25210˚C/WThermal Resistance Junction-to-Ambient (No air flow)3-Lead SOT-223(No heat sink)136˚C/W3-Lead TO-220(No heat sink)79˚C/W3-Lead TO-252(Note9)(No heat sink)92˚C/W3-Lead TO-26355˚C/W8-Lead LLP(Note10)40˚C/WLM1117/LM1117I5LM1117I Electrical CharacteristicsTypicals and limits appearing in normal type apply for T J =25˚C.Limits appearing in Boldface type apply over the entire junc-tion temperature range for operation,−40˚C to 125˚C.Symbol Parameter ConditionsMin (Note 5)Typ (Note 4)Max (Note 5)UnitsV REFReference VoltageLM1117I-ADJI OUT =10mA,V IN -V OUT =2V,T J =25˚C 10mA ≤I OUT ≤800mA,1.4V ≤V IN -V OUT ≤10V1.2381.2001.2501.2501.2621.290V VV OUTOutput VoltageLM1117I-3.3I OUT =10mA,V IN =5V,T J =25˚C 0≤I OUT ≤800mA,4.75V ≤V IN ≤10V 3.2673.168 3.3003.300 3.3333.432V V LM1117I-5.0I OUT =10mA,V IN =7V,T J =25˚C 0≤I OUT ≤800mA,6.5V ≤V IN ≤12V4.9504.8005.0005.000 5.0505.200V V ∆V OUTLine Regulation (Note 6)LM1117I-ADJI OUT =10mA,1.5V ≤V IN -V OUT ≤13.75V 0.0350.3%LM1117I-3.3I OUT =0mA,4.75V ≤V IN ≤15V 110mV LM1117I-5.0I OUT =0mA,6.5V ≤V IN ≤15V115mV ∆V OUTLoad Regulation (Note 6)LM1117I-ADJV IN -V OUT =3V,10≤I OUT ≤800mA 0.20.5%LM1117I-3.3V IN =4.75V,0≤I OUT ≤800mA 115mV LM1117I-5.0V IN =6.5V,0≤I OUT ≤800mA120mV V IN -V OUTDropout Voltage (Note 7)I OUT =100mA 1.10 1.30V I OUT =500mA 1.15 1.35V I OUT =800mA1.20 1.40V I LIMITCurrent Limit V IN -V OUT =5V,T J =25˚C 80012001500mA Minimum Load Current (Note 8)LM1117I-ADJ V IN =15V 1.75mA Quiescent CurrentLM1117I-3.3V IN ≤15V 515mA LM1117I-5.0V IN ≤15V515mA Thermal Regulation T A =25˚C,30ms Pulse0.010.1%/W Ripple Regulation f RIPPLE =120Hz,V IN -V OUT =3V V RIPPLE =1V PP6075dBAdjust Pin Current 60120µA Adjust Pin Current Change10≤I OUT ≤800mA,1.4V ≤V IN -V OUT ≤10V 0.210µA Temperature Stability 0.5%Long Term Stability T A =125˚C,1000Hrs0.3%RMS Output Noise (%of V OUT ),10Hz ≤f ≤10kHz 0.003%Thermal Resistance Junction-to-Case 3-Lead SOT-22315.0˚C/W 3-Lead TO-25210˚C/W Thermal Resistance Junction-to-Ambient No air flow)3-Lead SOT-223(No heat sink)136˚C/W 3-Lead TO-252(No heat sink)(Note 9)92˚C/W 8-Lead LLP(Note 10)40˚C/WNote 1:Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.Operating Ratings indicate conditions for which the device is intended to be functional,but specific performance is not guaranteed.For guaranteed specifications and the test conditions,see the Electrical Characteristics.L M 1117/L M 1117I 6Note 2:The maximum power dissipation is a function of T J(max),θJA ,and T A .The maximum allowable power dissipation at any ambient temperature is P D =(T J(max)–T A )/θJA .All numbers apply for packages soldered directly into a PC board.Note 3:For testing purposes,ESD was applied using human body model,1.5k Ωin series with 100pF.Note 4:Typical Values represent the most likely parametric norm.Note 5:All limits are guaranteed by testing or statistical analysis.Note 6:Load and line regulation are measured at constant junction room temperature.Note 7:The dropout voltage is the input/output differential at which the circuit ceases to regulate against further reduction in input voltage.It is measured when the output voltage has dropped 100mV from the nominal value obtained at V IN =V OUT +1.5V.Note 8:The minimum output current required to maintain regulation.Note 9:Minimum pad size of 0.038in 2Note 10:Thermal Performance for the LLP was obtained using JESD51-7board with six vias and an ambient temperature of 22˚C.For information about improved thermal performance and power dissipation for the LLP ,refer to Application Note AN-1187.Typical Performance CharacteristicsDropout Voltage (V IN -VOUT )Short-Circuit Current1009192210091923Load Regulation LM1117-ADJ Ripple Rejection1009194310091906LM1117/LM1117I7Typical Performance Characteristics(Continued)LM1117-ADJ Ripple Rejection vs.CurrentTemperature Stability1009190710091925Adjust Pin Current LM1117-2.85Load Transient Response1009192610091908LM1117-5.0Load Transient Response LM1117-2.85Line Transient Response1009190910091910L M 1117/L M 1117I 8Typical Performance Characteristics(Continued) LM1117-5.0Line Transient Response10091911Application Note1.0EXTERNAL CAPACITORS/STABILITY1.1Input Bypass CapacitorAn input capacitor is recommended.A10µF tantalum on the input is a suitable input bypassing for almost all applications.1.2Adjust Terminal Bypass CapacitorThe adjust terminal can be bypassed to ground with a by-pass capacitor(C ADJ)to improve ripple rejection.This by-pass capacitor prevents ripple from being amplified as the output voltage is increased.At any ripple frequency,the impedance of the C ADJ should be less than R1to prevent the ripple from being amplified:1/(2π*f RIPPLE*C ADJ)<R1The R1is the resistor between the output and the adjust pin. Its value is normally in the range of100-200Ω.For example, with R1=124Ωand f RIPPLE=120Hz,the C ADJ should be> 11µF.1.3Output CapacitorThe output capacitor is critical in maintaining regulator sta-bility,and must meet the required conditions for both mini-mum amount of capacitance and ESR(Equivalent Series Resistance).The minimum output capacitance required by the LM1117is10µF,if a tantalum capacitor is used.Any increase of the output capacitance will merely improve the loop stability and transient response.The ESR of the output capacitor should range between0.3Ω-22Ω.In the case of the adjustable regulator,when the C ADJ is used,a larger output capacitance(22µf tantalum)is required.2.0OUTPUT VOLTAGEThe LM1117adjustable version develops a1.25V reference voltage,V REF,between the output and the adjust terminal. As shown in Figure1,this voltage is applied across resistor R1to generate a constant current I1.The current I ADJ from the adjust terminal could introduce error to the output.But since it is very small(60µA)compared with the I1and very constant with line and load changes,the error can be ig-nored.The constant current I1then flows through the outputset resistor R2and sets the output voltage to the desiredlevel.For fixed voltage devices,R1and R2are integrated insidethe devices.3.0LOAD REGULATIONThe LM1117regulates the voltage that appears between itsoutput and ground pins,or between its output and adjustpins.In some cases,line resistances can introduce errors tothe voltage across the load.To obtain the best load regula-tion,a few precautions are needed.Figure2,shows a typical application using a fixed outputregulator.The Rt1and Rt2are the line resistances.It isobvious that the V LOAD is less than the V OUT by the sum ofthe voltage drops along the line resistances.In this case,theload regulation seen at the R LOAD would be degraded fromthe data sheet specification.To improve this,the load shouldbe tied directly to the output terminal on the positive side anddirectly tied to the ground terminal on the negative side.10091917FIGURE1.Basic Adjustable RegulatorLM1117/LM1117I9Application Note(Continued)When the adjustable regulator is used (Figure 3),the best performance is obtained with the positive side of the resistor R1tied directly to the output terminal of the regulator rather than near the load.This eliminates line drops from appearing effectively in series with the reference and degrading regu-lation.For example,a 5V regulator with 0.05Ωresistance between the regulator and load will have a load regulation due to line resistance of 0.05Ωx I L .If R1(=125Ω)is con-nected near the load,the effective line resistance will be 0.05Ω(1+R2/R1)or in this case,it is 4times worse.In addition,the ground side of the resistor R2can be returned near the ground of the load to provide remote ground sens-ing and improve load regulation.4.0PROTECTION DIODESUnder normal operation,the LM1117regulators do not need any protection diode.With the adjustable device,the internal resistance between the adjust and output terminals limits the current.No diode is needed to divert the current around the regulator even with capacitor on the adjust terminal.The adjust pin can take a transient signal of ±25V with respect to the output voltage without damaging the device.When a output capacitor is connected to a regulator and the input is shorted to ground,the output capacitor will discharge into the output of the regulator.The discharge current de-pends on the value of the capacitor,the output voltage of the regulator,and rate of decrease of V IN .In the LM1117regu-lators,the internal diode between the output and input pinscan withstand microsecond surge currents of 10A to 20A.With an extremely large output capacitor (≥1000µF),and with input instantaneously shorted to ground,the regulator could be damaged.In this case,an external diode is recommended between the output and input pins to protect the regulator,as shown in Figure 4.5.0HEATSINK REQUIREMENTSWhen an integrated circuit operates with an appreciable current,its junction temperature is elevated.It is important to quantify its thermal limits in order to achieve acceptable performance and reliability.This limit is determined by sum-ming the individual parts consisting of a series of tempera-ture rises from the semiconductor junction to the operating environment.A one-dimensional steady-state model of con-duction heat transfer is demonstrated in Figure 5.The heat generated at the device junction flows through the die to the die attach pad,through the lead frame to the surrounding case material,to the printed circuit board,and eventually to the ambient environment.Below is a list of variables that may affect the thermal resistance and in turn the need for a heatsink.R θJC (ComponentVariables)R θCA (ApplicationVariables)Leadframe Size &Material Mounting Pad Size,Material,&Location No.of Conduction Pins Placement of Mounting PadDie SizePCB Size &Material Die Attach Material Traces Length &Width Molding Compound Size and MaterialAdjacent Heat Sources Volume of Air Ambient Temperatue Shape of Mounting Pad10091918FIGURE 2.Typical Application using Fixed OutputRegulator 10091919FIGURE 3.Best Load Regulation using AdjustableOutput Regulator 10091915FIGURE 4.Regulator with Protection Diode L M 1117/L M 1117I10Application Note(Continued)The LM1117regulators have internal thermal shutdown to protect the device from over-heating.Under all possible operating conditions,the junction temperature of the LM1117must be within the range of 0˚C to 125˚C.A heatsink may be required depending on the maximum power dissipation and maximum ambient temperature of the application.To deter-mine if a heatsink is needed,the power dissipated by the regulator,P D ,must be calculated:I IN =I L +I GP D =(V IN -V OUT )I L +V IN I GFigure 6shows the voltages and currents which are present in the circuit.The next parameter which must be calculated is the maxi-mum allowable temperature rise,T R (max):T R (max)=T J (max)-T A (max)where T J (max)is the maximum allowable junction tempera-ture (125˚C),and T A (max)is the maximum ambient tem-perature which will be encountered in the application.Using the calculated values for T R (max)and P D ,the maxi-mum allowable value for the junction-to-ambient thermal resistance (θJA )can be calculated:θJA =T R (max)/P D If the maximum allowable value for θJA is found to be ≥136˚C/W for SOT-223package or ≥79˚C/W for TO-220package or ≥92˚C/W for TO-252package,no heatsink is needed since the package alone will dissipate enough heat to satisfy these requirements.If the calculated value for θJA falls below these limits,a heatsink is required.As a design aid,Table 1shows the value of the θJA of SOT-223and TO-252for different heatsink area.The copper patterns that we used to measure these θJA s are shown at the end of the Application Notes Section.Figure 7and Figure 8reflects the same test results as what are in the Table 1Figure 9and Figure 10shows the maximum allowable power dissipation vs.ambient temperature for the SOT-223and TO-252device.Figures Figure 11and Figure 12shows the maximum allowable power dissipation vs.copper area (in 2)for the SOT-223and TO-252devices.Please see AN1028for power enhancement techniques to be used with SOT-223and TO-252packages.*Application Note AN-1187discusses improved thermal per-formance and power dissipation for the LLP .TABLE 1.θJA Different Heatsink AreaLayout Copper AreaThermal ResistanceTop Side (in 2)*Bottom Side (in 2)(θJA ,˚C/W)SOT-223(θJA ,˚C/W)TO-25210.0123013610320.0660*******.30846040.530755450.76069526106647700.211584800.49870900.689631000.8825711017957120.0660.06612589130.1750.175937210091937FIGURE 5.Cross-sectional view of Integrated Circuit Mounted on a printed circuit board.Note that the case temperature is measured at the point where the leadscontact with the mounting pad surface 10091916FIGURE 6.Power Dissipation DiagramLM1117/LM1117IApplication Note(Continued)TABLE 1.θJA Different Heatsink Area (Continued)Layout Copper AreaThermal Resistance140.2840.2848361150.3920.3927555160.50.57053*Tab of device attached to topside copperL M 1117/L M 1117IApplication Note(Continued)10091913 FIGURE7.θJA vs.1oz Copper Area for SOT-22310091934 FIGURE8.θJA vs.2oz Copper Area for TO-25210091912 FIGURE9.Maximum Allowable Power Dissipation vs.Ambient Temperature for SOT-22310091936FIGURE10.Maximum Allowable Power Dissipation vs.Ambient Temperature for TO-25210091914FIGURE11.Maximum Allowable Power Dissipation vs.1oz Copper Area for SOT-22310091935FIGURE12.Maximum Allowable Power Dissipation vs.2oz Copper Area for TO-252LM1117/LM1117IApplication Note(Continued)10091941FIGURE 13.Top View of the Thermal Test Pattern in Actual ScaleL M 1117/L M 1117IApplication Note(Continued)10091942FIGURE14.Bottom View of the Thermal Test Pattern in Actual Scale LM1117/LM1117ITypical Application Circuits10091930Adjusting Output of Fixed Regulators10091931Regulator with Reference100919291.25V to 10V Adjustable Regulator with ImprovedRipple Rejection100919275V Logic Regulator with Electronic Shutdown*L M 1117/L M 1117ITypical Application Circuits(Continued)10091932Battery Backed-Up Regulated Supply10091933Low Dropout Negative Supply LM1117/LM1117IPhysical Dimensionsinches (millimeters)unless otherwise noted3-Lead SOT-223NS Package Number MP04A3-Lead TO-220NS Package Number T03BL M 1117/L M 1117IPhysical Dimensions inches(millimeters)unless otherwise noted(Continued)3-Lead TO-263NS Package Number TS3B LM1117/LM1117IPhysical Dimensionsinches (millimeters)unless otherwise noted (Continued)3-Lead TO-252NS Package Number TD03B8-Lead LLPNS Package Number LDC08AL M 1117/L M 1117INotesNational does not assume any responsibility for use of any circuitry described,no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.For the most current product information visit us at .LIFE SUPPORT POLICYNATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION.As used herein:1.Life support devices or systems are devices or systemswhich,(a)are intended for surgical implant into the body,or(b)support or sustain life,and whose failure to perform whenproperly used in accordance with instructions for use provided in the labeling,can be reasonably expected to result in a significant injury to the user.2.A critical component is any component of a life supportdevice or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system,or to affect its safety or effectiveness.BANNED SUBSTANCE COMPLIANCENational Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification(CSP-9-111C2)and the Banned Substances and Materials of Interest Specification(CSP-9-111S2)and contain no‘‘Banned Substances’’as defined in CSP-9-111S2.Leadfree products are RoHS compliant.National Semiconductor Americas CustomerSupport CenterEmail:new.feedback@ Tel:1-800-272-9959National SemiconductorEurope Customer Support CenterFax:+49(0)180-5308586Email:europe.support@Deutsch Tel:+49(0)6995086208English Tel:+44(0)8702402171Français Tel:+33(0)141918790National SemiconductorAsia Pacific CustomerSupport CenterEmail:ap.support@National SemiconductorJapan Customer Support CenterFax:81-3-5639-7507Email:jpn.feedback@Tel:81-3-5639-7560 LM1117/LM1117I 800mA Low-Dropout Linear Regulator。
MEMORY存储芯片LM1117MPX-3.3中文规格书
LM1117800mA Low-Dropout Linear RegulatorGeneral DescriptionThe LM1117is a series of low dropout voltage regulators with a dropout of1.2V at800mA of load current.It has the same pin-out as National Semiconductor’s industry standard LM317.The LM1117is available in an adjustable version,which can set the output voltage from1.25V to13.8V with only two ex-ternal resistors.In addition,it is also available in five fixed voltages,1.8V,2.5V,2.85V,3.3V,and5V.The LM1117offers current limiting and thermal shutdown.Its circuit includes a zener trimmed bandgap reference to as-sure output voltage accuracy to within±1%.The LM1117series is available in SOT-223,TO-220,and TO-252D-PAK packages.A minimum of10µF tantalum ca-pacitor is required at the output to improve the transient re-sponse and stability.Featuresn Available in1.8V,2.5V,2.85V,3.3V,5V,and Adjustable Versionsn Space Saving SOT-223Packagen Current Limiting and Thermal Protectionn Output Current800mA n Temperature Range0˚C to125˚C n Line Regulation0.2%(Max) n Load Regulation0.4%(Max)Applicationsn 2.85V Model for SCSI-2Active Terminationn Post Regulator for Switching DC/DC Convertern High Efficiency Linear Regulatorsn Battery Chargern Battery Powered InstrumentationTypical ApplicationActive Terminator for SCSI-2BusDS100919-5Fixed Output RegulatorDS100919-28LM1117 800mA Low-Dropout Linear RegulatorOrdering InformationPackageTemperature Range Packaging Marking Transport Media NSC Drawing 0˚C to +125˚C 3-lead SOT-223LM1117MPX-ADJN03A Tape and Reel MA04A LM1117MPX-1.8N12A Tape and Reel *LM1117MPX-2.5N13A Tape and Reel LM1117MPX-2.85N04A Tape and Reel LM1117MPX-3.3N05A Tape and Reel LM1117MPX-5.0N06A Tape and Reel 3-lead TO-220LM1117T-ADJLM1117T-ADJ Rails T03B LM1117T-2.85LM1117T-2.85Rails LM1117T-3.3LM1117T-3.3Rails LM1117T-5.0LM1117T-5.0Rails 3-lead TO-252LM1117DTX-ADJLM1117DT-ADJ Tape and Reel TD03BLM1117DTX-1.8LM1117DT-1.8Tape and Reel *LM1117DTX-2.5LM1117DT-2.5Tape and Reel LM1117DTX-2.85LM1117DT-2.85Tape and Reel LM1117DTX-3.3LM1117DT-3.3Tape and Reel LM1117DTX-5.0LM1117DT-5.0Tape and Reel Note:*Contact factory for availability.Block DiagramDS100919-1L M 1117Absolute Maximum Ratings (Note 1)If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/Distributors for availability and specifications.Maximum Input Voltage (V IN to GND)LM1117-ADJ,LM1117-1.8,LM1117-2.5,LM1117-3.3,LM1117-5.020V Power Dissipation (Note 2)Internally Limited Junction Temperature (T J )(Note 2)150˚C Storage Temperature Range-65˚C to 150˚C Lead Temperature TO-220(T)Package 260˚C,10sec SOT-223(IMP)Package 260˚C,4sec ESD Tolerance (Note 3)2000V Operating Ratings (Note 1)Input Voltage (V IN to GND)LM1117-ADJ,LM1117-1.8,LM1117-2.5,LM1117-3.3,LM1117-5.015V LM1117-2.8510V Junction Temperature Range (T J )(Note 2)0˚C to 125˚CElectrical CharacteristicsTypicals and limits appearing in normal type apply for T J =25˚C.Limits appearing in Boldface type apply over the entire junc-tion temperature range for operation,0˚C to 125˚C.SymbolParameter Conditions Min (Note 5)Typ (Note 4)Max (Note 5)Units V REF Reference Voltage LM1117-ADJI OUT =10mA,V IN -V OUT =2V,T J =25˚C10mA ≤I OUT ≤800mA,1.4V ≤V IN -V OUT≤10V1.2381.225 1.2501.250 1.2621.270V V V OUT Output Voltage LM1117-1.8I OUT =10mA,V IN =3.8V,T J =25˚C0≤I OUT ≤800mA,3.2V ≤V IN ≤10V1.7821.746 1.8001.800 1.8181.854V V LM1117-2.5I OUT =10mA,V IN =4.5V,T J =25˚C0≤I OUT ≤800mA,3.9V ≤V IN ≤10V2.4752.450 2.5002.500 2.5252.550V V LM1117-2.85I OUT =10mA,V IN =4.85V,T J =25˚C0≤I OUT ≤800mA,4.25V ≤V IN ≤10V0≤I OUT ≤500mA,V IN =4.10V2.8202.7902.790 2.8502.8502.850 2.8802.9102.910V V V LM1117-3.3I OUT =10mA,V IN =5V T J =25˚C0≤I OUT ≤800mA,4.75V ≤V IN ≤10V3.2673.235 3.3003.300 3.3333.365V V LM1117-5.0I OUT =10mA,V IN =7V,T J =25˚C0≤I OUT ≤800mA,6.5V ≤V IN ≤12V4.9504.9005.0005.000 5.0505.100V V ∆V OUT Line Regulation(Note 6)LM1117-ADJ I OUT =10mA,1.5V ≤V IN -V OUT ≤13.75V0.0350.2%LM1117-1.8I OUT =0mA,3.2V ≤V IN ≤10V16mV LM1117-2.5I OUT =0mA,3.9V ≤V IN ≤10V16mV LM1117-2.85I OUT =0mA,4.25V ≤V IN ≤10V16mV LM1117-3.3I OUT =0mA,4.75V ≤V IN ≤15V16mV LM1117-5.0I OUT =0mA,6.5V ≤V IN ≤15V 110mVL M 1117Typical Performance CharacteristicsDropout Voltage(V IN-V OUT)DS100919-22Short-Circuit CurrentDS100919-23Load RegulationDS100919-24LM1117-ADJ Ripple RejectionDS100919-6LM1117-ADJ Ripple Rejection vs.CurrentDS100919-7Temperature StabilityDS100919-25LM1117。
LM1117-1.8 中文资料
1.176 1.2 1.224 V 1.152 1.2 1.248
1.485 1.500 1.515 V 1.470 1.500 1.530
VOUT AMS1117-1.8,
共10页 第4页
管脚排列图
AMS1117
AMS1117
AMS1117
AMS1117
AMS1117
AMS1117
管脚描述
管脚号 1 2 3
管脚名称 GND/ADJ
VOUT VIN
I/O
--/O 地/ADJ。
O
输出电压。
I
输入工作电压。
功能
ADVANCED MONOLITHIC SYSTEMS (translate by BONA 0755-82800289)
2.940 3.000 3.060
AMS1117-3.3, IOUT=10mA, VIN=5V,TJ=25°C , 0≤IOUT≤1A, 4.75V≤VIN≤10V
3.267 3.300 3.333 V 3.235 3.300 3.365
AMS1117-5.0,
IOUT=10mA, VIN=7V, TJ=25°C , 4.950 5.000 5.05 V
内部框图
ADVANCED MONOLITHIC SYSTEMS (translate by BONA 0755-82800289)
共10页 第2页
AMS1117
极限参数
参数 输入工作电压 引脚温度 (焊接5秒) 工作结温范围 储存温度 功耗 ESD能力 (最小值)
LM1117-2.5 中文资料
符号 VIN TLead TJ TSTG PD ESD
范围
20 260 150 -65 ~ +150 内部限制 (注1) 2000
单位 V °C °C °C
mW V
注1：最大允许功耗是最大工作结温TJ (max)，结对空热阻θJA 和环境温度Tamb的函数。最大允许 功耗在给定的环境温度下， PD (max) = (TJ (max) - Tamb)/θJA，超过最大允许功耗会导致芯片 温度过高，调整器因此会进入到过热切断状态。不同封装类型的结对空热阻θJA 是不同的， 由封装技术决定。
ADJ R1
R2 VOUT=VREF x (1+R2/R1)+IADJ x R2
VOUT 22 F
图 2. 典型可调输出电压 注：以上线路及参数仅供参考，实际的应用电路请在充分的实测基础上设定参数。
111111111111111111111111111111111111111111111111111111 ADVANCED MONOLITHIC SYSTEMS (translate by BONA 0755-82800289)
VREF IOUT=10mA, VIN-VOUT=2V, TJ=25°C 1.238 1.250 1.262 V 10mA≤IOUT≤1A, 1.4V≤VIN-VOUT≤10V 1.225 1.250 1.270
AMS1117-1.2,
IOUT=10mΑ, VIN=3.2V ,TJ=25°C 10mA≤IOUT≤1A, 3.0V≤VIN≤10V
产品名称
AMS1117-ADJ AMS1117-1.2 AMS1117-1.5 AMS1117-1.8 AMS1117-2.5 AMS1117-2.85 AMS1117-3.0 AMS1117-3.3 AMS1117-5.0 AMS1117-ADJ AMS1117-1.2 AMS1117-1.5 AMS1117-1.8 AMS1117-2.5
LM1117唯一替代型号 中文PDF资料
90
fRIPPLER=120Hz
80
VRIPPLE 3Vpp
70
60
fRIPPLE=20KHz
50
VRIPPLE 0.5Vpp
40
30 VOUT=5V 20 CADJ=25 F 10 COUT=25 F
0
0
200 400 600 800
ILOAD(mA)
1000
封装外形图
应用
* 膝上型电脑，掌上电脑和笔记本 电脑
* 电池充电器 * SCSI-II主动终端 * 移动电话 * 无绳电话 * 电池供电系统 * 便携式设备 * SMPS波斯特稳压器
产品规格分类（温度范围：-40°C~ 125°C）
X1117
产品名称 X 1117H- ADJTR X 1117H- 1.8TR X 1117H- 3.3TR X 1117H- ADJTR X 1117H- 1.8TR X 1117H- 3.3TR
推荐工作条件
参数 输入电压 工作结温范围
符号 VIN TJ
范围 15
-40 ~ +125
单位 V °C
X1117
第一价值网（ＩＣ网络超市）
电气特性(除非特别指定，否则黑色字体所示的参数，Tamb=25°C，正常工作结温范围 -40°C ~125°C。)
参数 基准电压
3.235 3.300 3.365
X1117-5.0,
IOUT=10mA, VIN=7V, TJ=25°C , 0≤ IOUT≤1A, 6.5V≤VIN≤12V
4.950 5.000 5.05 V 4.900 5.000 5.10
TSOUT
0.3
%
VINMIN ≤VIN≤ 12V, Rline
LM1117_中文PDF资料
1A LDO稳压器电路概述是一款正电压输出的低压降三端线性稳压电路，在1A输出电流下的压降为1.2V。
分为两个版本，固定电压输出版本和可调电压输出版本。
固定输出电压1.5V、1.8V、2.5V、3.3V、5.0V和可调版本的电压精度为1％；固定电压为1.2V的产品输出电压精度为2％。
内部集成过热保护和限流电路，适用于各类电子产品。
特点*固定输出电压为1.5V、1.8V、2.5V、3.3V、5.0V和可调版本的电压精度为1％*固定电压为1.2V的输出电压精度为2％*低漏失电压：1A输出电流时仅为 1.2V*限流功能*过热切断*温度范围：-40°C~ 125°C应用*膝上型电脑，掌上电脑和笔记本电脑*电池充电器* SCSI-II主动终端*移动电话*无绳电话*电池供电系统*便携式设备* SMPS波斯特稳压器产品规格分类（温度范围：-40°C~ 125°C）X1117X1117X1117X1117X1117换页UX产品名称封装打印名称材料包装X 1117H - ADJ无铅编带X 1117H- 1.8TRX 1117H - 1.8编带X 1117H- 3.3TRX 1117H - 3.3编带SOT-223-3LX 1117H- ADJTR编带编带编带无铅无铅X 1117H- ADJTRX 1117H- 1.8TRX 1117H- 3.3TRX 1117H - ADJX 1117H - 3.3X 1117H - 1.8无卤无卤无卤内部框图3带隙限流TSD21AVOUTADJ/GNDVIN固定版本:F1和F2连接A断开可调版本: A连接， F1和 F2断开F1F2X1117换页极限参数参数符号范围单位输入工作电压引脚温度 (焊接5秒)TLead260°C工作结温范围TJ150°C储存温度TSTG-65 ~ +150°C功耗PD内部限制 (注1)mWESD能力 (最小值)ESD2000V注1：最大允许功耗是最大工作结温TJ (max)，结对空热阻θJA和环境温度Tamb的函数。
LM1117数据手册
LM1117/LM1117I800mA Low-Dropout Linear RegulatorGeneral DescriptionThe LM1117is a series of low dropout voltage regulators with a dropout of 1.2V at 800mA of load current.It has the same pin-out as National Semiconductor’s industry standard LM317.The LM1117is available in an adjustable version,which can set the output voltage from 1.25V to 13.8V with only two external resistors.In addition,it is also available in five fixed voltages,1.8V,2.5V,2.85V,3.3V,and 5V.The LM1117offers current limiting and thermal shutdown.Its circuit includes a zener trimmed bandgap reference to as-sure output voltage accuracy to within ±1%.The LM1117series is available in LLP ,TO-263,SOT-223,TO-220,and TO-252D-PAK packages.A minimum of 10µF tantalum capacitor is required at the output to improve the transient response and stability.Featuresn Available in 1.8V,2.5V,2.85V,3.3V,5V,and Adjustable Versionsn Space Saving SOT-223and LLP Packages n Current Limiting and Thermal Protection n Output Current 800mA n Line Regulation 0.2%(Max)n Load Regulation 0.4%(Max)n Temperature Range —LM11170˚C to 125˚C —LM1117I −40˚C to 125˚CApplicationsn 2.85V Model for SCSI-2Active Termination n Post Regulator for Switching DC/DC Converter n High Efficiency Linear Regulators n Battery ChargernBattery Powered InstrumentationTypical ApplicationActive Terminator for SCSI-2Bus10091905Fixed Output Regulator10091928June 2004LM1117/LM1117I 800mA Low-Dropout Linear Regulator©2004National Semiconductor Corporation Ordering InformationPackage TemperatureRange Part Number Packaging MarkingTransport Media NSC Drawing 3-lead SOT-2230˚C to +125˚CLM1117MPX-ADJ N03A Tape and Reel MP04ALM1117MPX-1.8N12A Tape and Reel LM1117MPX-2.5N13A Tape and Reel LM1117MPX-2.85N04A Tape and Reel LM1117MPX-3.3N05A Tape and Reel LM1117MPX-5.0N06A Tape and Reel −40˚C to +125˚CLM1117IMPX-ADJ N03B Tape and Reel LM1117IMPX-3.3N05B Tape and Reel LM1117IMPX-5.0N06B Tape and Reel3-lead TO-2200˚C to +125˚CLM1117T-ADJ LM1117T-ADJ Rails T03B LM1117T-1.8LM1117T-1.8Rails LM1117T-2.5LM1117T-2.5Rails LM1117T-2.85LM1117T-2.85Rails LM1117T-3.3LM1117T-3.3Rails LM1117T-5.0LM1117T-5.0Rails 3-lead TO-2520˚C to +125˚CLM1117DTX-ADJ LM1117DT-ADJ Tape and Reel TD03B LM1117DTX-1.8LM1117DT-1.8Tape and Reel LM1117DTX-2.5LM1117DT-2.5Tape and Reel LM1117DTX-2.85LM1117DT-2.85Tape and Reel LM1117DTX-3.3LM1117DT-3.3Tape and Reel LM1117DTX-5.0LM1117DT-5.0Tape and Reel −40˚C to +125˚CLM1117IDTX-ADJ LM1117IDT-ADJ Tape and Reel LM1117IDTX-3.3LM1117IDT-3.3Tape and Reel LM1117IDTX-5.0LM1117IDT-5.0Tape and Reel 8-lead LLP0˚C to +125˚CLM1117LDX-ADJ 1117ADJ Tape and Reel LDC08A LM1117LDX-1.81117-18Tape and Reel LM1117LDX-2.51117-25Tape and Reel LM1117LDX-2.851117-28Tape and Reel LM1117LDX-3.31117-33Tape and Reel LM1117LDX-5.01117-50Tape and Reel −40˚C to 125˚CLM1117ILDX-ADJ 1117IAD Tape and Reel LM1117ILDX-3.31117I33Tape and Reel LM1117ILDX-5.01117I50Tape and Reel TO-2630˚C to +125˚CLM1117SX-ADJ LM1117SADJ Tape and Reel TS3B LM1117SX-2.85LM1117S2.85Tape and Reel LM1117SX-3.3LM1117S3.3Tape and Reel LM1117SX-5.0LM1117S5.0Tape and ReelL M 1117/L M 1117I 2Block Diagram10091901Connection DiagramsSOT-22310091904Top ViewTO-22010091902Top ViewTO-25210091938Top ViewTO-26310091944Top View10091945Side ViewLLP10091946When using the LLP packagePins2,3&4must be connected together andPins5,6&7must be connected togetherTop ViewLM1117/LM1117I3Absolute Maximum Ratings (Note 1)If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/Distributors for availability and specifications.Maximum Input Voltage (V IN to GND)20VPower Dissipation (Note 2)Internally LimitedJunction Temperature (T J )(Note 2)150˚CStorage Temperature Range -65˚C to 150˚CLead TemperatureTO-220(T)Package 260˚C,10sec SOT-223(IMP)Package 260˚C,4secESD Tolerance (Note 3)2000VOperating Ratings (Note 1)Input Voltage (V IN to GND)15VJunction Temperature Range (T J )(Note 2)LM11170˚C to 125˚C LM1117I−40˚C to 125˚CLM1117Electrical CharacteristicsTypicals and limits appearing in normal type apply for T J =25˚C.Limits appearing in Boldface type apply over the entire junc-tion temperature range for operation,0˚C to 125˚C.Symbol Parameter ConditionsMin (Note 5)Typ (Note 4)Max (Note 5)UnitsV REFReference VoltageLM1117-ADJI OUT =10mA,V IN -V OUT =2V,T J =25˚C 10mA ≤I OUT ≤800mA,1.4V ≤V IN -V OUT ≤10V1.2381.2251.2501.2501.2621.270V VV OUTOutput VoltageLM1117-1.8I OUT =10mA,V IN =3.8V,T J =25˚C 0≤I OUT ≤800mA,3.2V ≤V IN ≤10V 1.7821.746 1.8001.800 1.8181.854V V LM1117-2.5I OUT =10mA,V IN =4.5V,T J =25˚C 0≤I OUT ≤800mA,3.9V ≤V IN ≤10V 2.4752.450 2.5002.500 2.5252.550V V LM1117-2.85I OUT =10mA,V IN =4.85V,T J =25˚C 0≤I OUT ≤800mA,4.25V ≤V IN ≤10V 0≤I OUT ≤500mA,V IN =4.10V 2.8202.7902.790 2.8502.8502.850 2.8802.9102.910V V V LM1117-3.3I OUT =10mA,V IN =5V T J =25˚C 0≤I OUT ≤800mA,4.75V ≤V IN ≤10V 3.2673.235 3.3003.300 3.3333.365V V LM1117-5.0I OUT =10mA,V IN =7V,T J =25˚C 0≤I OUT ≤800mA,6.5V ≤V IN ≤12V4.9504.9005.0005.000 5.0505.100V V ∆V OUTLine Regulation (Note 6)LM1117-ADJI OUT =10mA,1.5V ≤V IN -V OUT ≤13.75V 0.0350.2%LM1117-1.8I OUT =0mA,3.2V ≤V IN ≤10V 16mV LM1117-2.5I OUT =0mA,3.9V ≤V IN ≤10V 16mVLM1117-2.85I OUT =0mA,4.25V ≤V IN ≤10V 16mV LM1117-3.3I OUT =0mA,4.75V ≤V IN ≤15V 16mV LM1117-5.0I OUT =0mA,6.5V ≤V IN ≤15V110mVL M 1117/L M 1117I 4LM1117Electrical Characteristics(Continued)Typicals and limits appearing in normal type apply for T J=25˚C.Limits appearing in Boldface type apply over the entire junc-tion temperature range for operation,0˚C to125˚C.Symbol Parameter ConditionsMin(Note5)Typ(Note4)Max(Note5)Units∆V OUT Load Regulation(Note6)LM1117-ADJV IN-V OUT=3V,10≤I OUT≤800mA0.20.4% LM1117-1.8V IN=3.2V,0≤I OUT≤800mA110mVLM1117-2.5V IN=3.9V,0≤I OUT≤800mA110mVLM1117-2.85V IN=4.25V,0≤I OUT≤800mA110mV LM1117-3.3V IN=4.75V,0≤I OUT≤800mA110mV LM1117-5.0V IN=6.5V,0≤I OUT≤800mA115mVV IN-V OUT Dropout Voltage(Note7)I OUT=100mA 1.10 1.20V I OUT=500mA 1.15 1.25V I OUT=800mA 1.20 1.30VI LIMIT Current Limit V IN-V OUT=5V,T J=25˚C80012001500mAMinimum Load Current(Note8)LM1117-ADJV IN=15V 1.75mAQuiescent Current LM1117-1.8V IN≤15V510mALM1117-2.5V IN≤15V510mALM1117-2.85V IN≤10V510mALM1117-3.3V IN≤15V510mALM1117-5.0V IN≤15V510mA Thermal Regulation T A=25˚C,30ms Pulse0.010.1%/W Ripple Regulation f RIPPLE=120Hz,V IN-V OUT=3V V RIPPLE=1V PP6075dB Adjust Pin Current60120µAAdjust Pin Current Change 10≤I OUT≤800mA,1.4V≤V IN-V OUT≤10V0.25µATemperature Stability0.5% Long Term Stability T A=125˚C,1000Hrs0.3% RMS Output Noise(%of V OUT),10Hz≤f≤10kHz0.003%Thermal Resistance Junction-to-Case 3-Lead SOT-22315.0˚C/W 3-Lead TO-220 3.0˚C/W 3-Lead TO-25210˚C/WThermal Resistance Junction-to-Ambient (No air flow)3-Lead SOT-223(No heat sink)136˚C/W3-Lead TO-220(No heat sink)79˚C/W3-Lead TO-252(Note9)(No heat sink)92˚C/W3-Lead TO-26355˚C/W8-Lead LLP(Note10)40˚C/WLM1117/LM1117I5LM1117I Electrical CharacteristicsTypicals and limits appearing in normal type apply for T J =25˚C.Limits appearing in Boldface type apply over the entire junc-tion temperature range for operation,−40˚C to 125˚C.Symbol Parameter ConditionsMin (Note 5)Typ (Note 4)Max (Note 5)UnitsV REFReference VoltageLM1117I-ADJI OUT =10mA,V IN -V OUT =2V,T J =25˚C 10mA ≤I OUT ≤800mA,1.4V ≤V IN -V OUT ≤10V1.2381.2001.2501.2501.2621.290V VV OUTOutput VoltageLM1117I-3.3I OUT =10mA,V IN =5V,T J =25˚C 0≤I OUT ≤800mA,4.75V ≤V IN ≤10V 3.2673.168 3.3003.300 3.3333.432V V LM1117I-5.0I OUT =10mA,V IN =7V,T J =25˚C 0≤I OUT ≤800mA,6.5V ≤V IN ≤12V4.9504.8005.0005.000 5.0505.200V V ∆V OUTLine Regulation (Note 6)LM1117I-ADJI OUT =10mA,1.5V ≤V IN -V OUT ≤13.75V 0.0350.3%LM1117I-3.3I OUT =0mA,4.75V ≤V IN ≤15V 110mV LM1117I-5.0I OUT =0mA,6.5V ≤V IN ≤15V115mV ∆V OUTLoad Regulation (Note 6)LM1117I-ADJV IN -V OUT =3V,10≤I OUT ≤800mA 0.20.5%LM1117I-3.3V IN =4.75V,0≤I OUT ≤800mA 115mV LM1117I-5.0V IN =6.5V,0≤I OUT ≤800mA120mV V IN -V OUTDropout Voltage (Note 7)I OUT =100mA 1.10 1.30V I OUT =500mA 1.15 1.35V I OUT =800mA1.20 1.40V I LIMITCurrent Limit V IN -V OUT =5V,T J =25˚C 80012001500mA Minimum Load Current (Note 8)LM1117I-ADJ V IN =15V 1.75mA Quiescent CurrentLM1117I-3.3V IN ≤15V 515mA LM1117I-5.0V IN ≤15V515mA Thermal Regulation T A =25˚C,30ms Pulse0.010.1%/W Ripple Regulation f RIPPLE =120Hz,V IN -V OUT =3V V RIPPLE =1V PP6075dBAdjust Pin Current 60120µA Adjust Pin Current Change10≤I OUT ≤800mA,1.4V ≤V IN -V OUT ≤10V 0.210µA Temperature Stability 0.5%Long Term Stability T A =125˚C,1000Hrs0.3%RMS Output Noise (%of V OUT ),10Hz ≤f ≤10kHz 0.003%Thermal Resistance Junction-to-Case 3-Lead SOT-22315.0˚C/W 3-Lead TO-25210˚C/W Thermal Resistance Junction-to-Ambient No air flow)3-Lead SOT-223(No heat sink)136˚C/W 3-Lead TO-252(No heat sink)(Note 9)92˚C/W 8-Lead LLP(Note 10)40˚C/WNote 1:Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.Operating Ratings indicate conditions for which the device is intended to be functional,but specific performance is not guaranteed.For guaranteed specifications and the test conditions,see the Electrical Characteristics.L M 1117/L M 1117I 6Note 2:The maximum power dissipation is a function of T J(max),θJA ,and T A .The maximum allowable power dissipation at any ambient temperature is P D =(T J(max)–T A )/θJA .All numbers apply for packages soldered directly into a PC board.Note 3:For testing purposes,ESD was applied using human body model,1.5k Ωin series with 100pF.Note 4:Typical Values represent the most likely parametric norm.Note 5:All limits are guaranteed by testing or statistical analysis.Note 6:Load and line regulation are measured at constant junction room temperature.Note 7:The dropout voltage is the input/output differential at which the circuit ceases to regulate against further reduction in input voltage.It is measured when the output voltage has dropped 100mV from the nominal value obtained at V IN =V OUT +1.5V.Note 8:The minimum output current required to maintain regulation.Note 9:Minimum pad size of 0.038in 2Note 10:Thermal Performance for the LLP was obtained using JESD51-7board with six vias and an ambient temperature of 22˚C.For information about improved thermal performance and power dissipation for the LLP ,refer to Application Note AN-1187.Typical Performance CharacteristicsDropout Voltage (V IN -VOUT )Short-Circuit Current1009192210091923Load Regulation LM1117-ADJ Ripple Rejection1009194310091906LM1117/LM1117I7Typical Performance Characteristics(Continued)LM1117-ADJ Ripple Rejection vs.CurrentTemperature Stability1009190710091925Adjust Pin Current LM1117-2.85Load Transient Response1009192610091908LM1117-5.0Load Transient Response LM1117-2.85Line Transient Response1009190910091910L M 1117/L M 1117I 8Typical Performance Characteristics(Continued) LM1117-5.0Line Transient Response10091911Application Note1.0External Capacitors/Stability1.1Input Bypass CapacitorAn input capacitor is recommended.A10µF tantalum on theinput is a suitable input bypassing for almost all applications.1.2Adjust Terminal Bypass CapacitorThe adjust terminal can be bypassed to ground with a by-pass capacitor(C ADJ)to improve ripple rejection.This by-pass capacitor prevents ripple from being amplified as theoutput voltage is increased.At any ripple frequency,theimpedance of the C ADJ should be less than R1to prevent theripple from being amplified:1/(2π*f RIPPLE*C ADJ)<R1The R1is the resistor between the output and the adjust pin.Its value is normally in the range of100-200Ω.For example,with R1=124Ωand f RIPPLE=120Hz,the C ADJ should be>11µF.1.3Output CapacitorThe output capacitor is critical in maintaining regulator sta-bility,and must meet the required conditions for both mini-mum amount of capacitance and ESR(Equivalent Series Resistance).The minimum output capacitance required by the LM1117is10µF,if a tantalum capacitor is used.Any increase of the output capacitance will merely improve the loop stability and transient response.The ESR of the output capacitor should range between0.3Ω-22Ω.In the case of the adjustable regulator,when the C ADJ is used,a larger output capacitance(22µf tantalum)is required.2.0Output VoltageThe LM1117adjustable version develops a1.25V reference voltage,V REF,between the output and the adjust terminal. As shown in Figure1,this voltage is applied across resistor R1to generate a constant current I1.The current I ADJ from the adjust terminal could introduce error to the output.But since it is very small(60µA)compared with the I1and very constant with line and load changes,the error can be ig-nored.The constant current I1then flows through the output set resistor R2and sets the output voltage to the desired level.For fixed voltage devices,R1and R2are integrated inside the devices.3.0Load RegulationThe LM1117regulates the voltage that appears between itsoutput and ground pins,or between its output and adjustpins.In some cases,line resistances can introduce errors tothe voltage across the load.To obtain the best load regula-tion,a few precautions are needed.Figure2,shows a typical application using a fixed outputregulator.The Rt1and Rt2are the line resistances.It isobvious that the V LOAD is less than the V OUT by the sum ofthe voltage drops along the line resistances.In this case,theload regulation seen at the R LOAD would be degraded fromthe data sheet specification.To improve this,the load shouldbe tied directly to the output terminal on the positive side anddirectly tied to the ground terminal on the negative side.10091917FIGURE1.Basic Adjustable RegulatorLM1117/LM1117I9Application Note(Continued)When the adjustable regulator is used (Figure 3),the best performance is obtained with the positive side of the resistor R1tied directly to the output terminal of the regulator rather than near the load.This eliminates line drops from appearing effectively in series with the reference and degrading regu-lation.For example,a 5V regulator with 0.05Ωresistance between the regulator and load will have a load regulation due to line resistance of 0.05Ωx I L .If R1(=125Ω)is con-nected near the load,the effective line resistance will be 0.05Ω(1+R2/R1)or in this case,it is 4times worse.In addition,the ground side of the resistor R2can be returned near the ground of the load to provide remote ground sens-ing and improve load regulation.4.0Protection DiodesUnder normal operation,the LM1117regulators do not need any protection diode.With the adjustable device,the internal resistance between the adjust and output terminals limits the current.No diode is needed to divert the current around the regulator even with capacitor on the adjust terminal.The adjust pin can take a transient signal of ±25V with respect to the output voltage without damaging the device.When a output capacitor is connected to a regulator and the input is shorted to ground,the output capacitor will discharge into the output of the regulator.The discharge current de-pends on the value of the capacitor,the output voltage of the regulator,and rate of decrease of V IN .In the LM1117regu-lators,the internal diode between the output and input pins can withstand microsecond surge currents of 10A to 20A.With an extremely large output capacitor (≥1000µF),and with input instantaneously shorted to ground,the regulator could be damaged.In this case,an external diode is recommended between the output and input pins to protect the regulator,as shown in Figure 4.5.0Heatsink RequirementsWhen an integrated circuit operates with an appreciable current,its junction temperature is elevated.It is important to quantify its thermal limits in order to achieve acceptable performance and reliability.This limit is determined by sum-ming the individual parts consisting of a series of tempera-ture rises from the semiconductor junction to the operating environment.A one-dimensional steady-state model of con-duction heat transfer is demonstrated in Figure 5.The heat generated at the device junction flows through the die to the die attach pad,through the lead frame to the surrounding case material,to the printed circuit board,and eventually to the ambient environment.Below is a list of variables that may affect the thermal resistance and in turn the need for a heatsink.R θJC (ComponentVariables)R θCA (ApplicationVariables)Leadframe Size &Material Mounting Pad Size,Material,&Location No.of Conduction Pins Placement of Mounting PadDie SizePCB Size &Material Die Attach Material Traces Length &Width Molding Compound Size and MaterialAdjacent Heat Sources Volume of Air Ambient Temperatue Shape of Mounting Pad10091918FIGURE 2.Typical Application using Fixed OutputRegulator 10091919FIGURE 3.Best Load Regulation using AdjustableOutput Regulator 10091915FIGURE 4.Regulator with Protection Diode L M 1117/L M 1117I10Application Note(Continued)The LM1117regulators have internal thermal shutdown to protect the device from over-heating.Under all possible operating conditions,the junction temperature of the LM1117must be within the range of 0˚C to 125˚C.A heatsink may be required depending on the maximum power dissipation and maximum ambient temperature of the application.To deter-mine if a heatsink is needed,the power dissipated by the regulator,P D ,must be calculated:I IN =I L +I GP D =(V IN -V OUT )I L +V IN I GFigure 6shows the voltages and currents which are present in the circuit.The next parameter which must be calculated is the maxi-mum allowable temperature rise,T R (max):T R (max)=T J (max)-T A (max)where T J (max)is the maximum allowable junction tempera-ture (125˚C),and T A (max)is the maximum ambient tem-perature which will be encountered in the application.Using the calculated values for T R (max)and P D ,the maxi-mum allowable value for the junction-to-ambient thermal resistance (θJA )can be calculated:θJA =T R (max)/P DIf the maximum allowable value for θJA is found to be ≥136˚C/W for SOT-223package or ≥79˚C/W for TO-220package or ≥92˚C/W for TO-252package,no heatsink is needed since the package alone will dissipate enough heat to satisfy these requirements.If the calculated value for θJA falls below these limits,a heatsink is required.As a design aid,Table 1shows the value of the θJA of SOT-223and TO-252for different heatsink area.The copper patterns that we used to measure these θJA s are shown at the end of the Application Notes Section.Figure 7and Figure 8reflects the same test results as what are in the Table 1Figure 9and Figure 10shows the maximum allowable power dissipation vs.ambient temperature for the SOT-223and TO-252device.Figures Figure 11and Figure 12shows the maximum allowable power dissipation vs.copper area (in 2)for the SOT-223and TO-252devices.Please see AN1028for power enhancement techniques to be used with SOT-223and TO-252packages.*Application Note AN-1187discusses improved thermal per-formance and power dissipation for the LLP .TABLE 1.θJA Different Heatsink AreaLayout Copper AreaThermal ResistanceTop Side (in 2)*Bottom Side (in 2)(θJA ,˚C/W)SOT-223(θJA ,˚C/W)TO-25210.0123013610320.0660*******.30846040.530755450.76069526106647700.211584800.49870900.689631000.8825711017957120.0660.06612589130.1750.175937210091937FIGURE 5.Cross-sectional view of Integrated Circuit Mounted on a printed circuit board.Note that the case temperature is measured at the point where the leadscontact with the mounting pad surface 10091916FIGURE 6.Power Dissipation DiagramLM1117/LM1117IApplication Note(Continued)TABLE 1.θJA Different Heatsink Area (Continued)Layout Copper AreaThermal Resistance140.2840.2848361150.3920.3927555160.50.57053*Tab of device attached to topside copperL M 1117/L M 1117IApplication Note(Continued)10091913 FIGURE7.θJA vs.1oz Copper Area for SOT-22310091934 FIGURE8.θJA vs.2oz Copper Area for TO-25210091912 FIGURE9.Maximum Allowable Power Dissipation vs.Ambient Temperature for SOT-22310091936FIGURE10.Maximum Allowable Power Dissipation vs.Ambient Temperature for TO-25210091914FIGURE11.Maximum Allowable Power Dissipation vs.1oz Copper Area for SOT-22310091935FIGURE12.Maximum Allowable Power Dissipation vs.2oz Copper Area for TO-252LM1117/LM1117IApplication Note(Continued)10091941FIGURE 13.Top View of the Thermal Test Pattern in Actual ScaleL M 1117/L M 1117IApplication Note(Continued)10091942FIGURE14.Bottom View of the Thermal Test Pattern in Actual Scale LM1117/LM1117ITypical Application Circuits10091930Adjusting Output of Fixed Regulators10091931Regulator with Reference100919291.25V to 10V Adjustable Regulator with ImprovedRipple Rejection100919275V Logic Regulator with Electronic Shutdown*L M 1117/L M 1117ITypical Application Circuits(Continued)10091932Battery Backed-Up Regulated Supply10091933Low Dropout Negative Supply LM1117/LM1117IPhysical Dimensionsinches (millimeters)unless otherwise noted3-Lead SOT-223NS Package Number MP04A3-Lead TO-220NS Package Number T03BL M 1117/L M 1117IPhysical Dimensions inches(millimeters)unless otherwise noted(Continued)3-Lead TO-263NS Package Number TS3B LM1117/LM1117IPhysical Dimensionsinches (millimeters)unless otherwise noted (Continued)3-Lead TO-252NS Package Number TD03B8-Lead LLPNS Package Number LDC08AL M 1117/L M 1117INotesLIFE SUPPORT POLICYNATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION.As used herein:1.Life support devices or systems are devices orsystems which,(a)are intended for surgical implant into the body,or(b)support or sustain life,and whose failure to perform when properly used in accordance with instructions for use provided in the labeling,can be reasonably expected to result in a significant injury to the user.2.A critical component is any component of a lifesupport device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system,or to affect its safety or effectiveness.BANNED SUBSTANCE COMPLIANCENational Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification(CSP-9-111C2)and the Banned Substances and Materials of Interest Specification (CSP-9-111S2)and contain no‘‘Banned Substances’’as defined in CSP-9-111S2.National Semiconductor Americas CustomerSupport CenterEmail:new.feedback@ Tel:1-800-272-9959National SemiconductorEurope Customer Support CenterFax:+49(0)180-5308586Email:europe.support@Deutsch Tel:+49(0)6995086208English Tel:+44(0)8702402171Français Tel:+33(0)141918790National SemiconductorAsia Pacific CustomerSupport CenterEmail:ap.support@National SemiconductorJapan Customer Support CenterFax:81-3-5639-7507Email:jpn.feedback@Tel:81-3-5639-7560 LM1117/LM1117I 800mA Low-Dropout Linear RegulatorNational does not assume any responsibility for use of any circuitry described,no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.。
低压差LM1117的应用
低压差LM1117的应用▲上图为LM1117 5V转3V稳压电路图。
LM1117是美国国家半导体公司生产的一款低压差三端稳压集成电路，其最高输入电压为15V，输出电压分为固定版和可调版。
固定版的可以输出1.2V、1.5V、1.8V、2.5V、3.3V和5.0V这几种电压。
可调版的输出电压可在1.25～13.8V之间调整。
该IC的最大输出电流为800mA。
在输出电流为800mA时，其最大压差为1.2V。
图中，输出电压的计算公式为：Vout＝1.25（1+R2/R1）。
由于LM1117的Adj端的电流Iadj仅50μA，故IadjR2可以忽略不计。
可见，只要改变R2阻值即可获得3V的输出电压。
TO-220封装的LM1117adj的外形。
▲ TO-263封装的LM1117的外形。
LM1117的最大压差为1.2V，也就是说，只要输入电压高于输出电压1.2V，该稳压IC即可输出3V的稳定电压。
本电路若采用LM317，将无法输出3V的稳定电压。
因为LM317正常工作时，最小压差也得3V，若小于此值，LM317内部电路将无法正常工作，输出电压也会不稳定，会随输入电压变化而变化。
顺便说一下，若采用串联二极管的方法来获得3V的稳定电压，是不可能的。
因为二极管是一个非线性元件，其正向压降会随流过该二极管的正向电流的变化而变化，这样负载电流变化时，输出电压也会变化，所以这种方法无法保证输出电压是稳定的3V电压。
▲ AMS1117降压电源模块。
现在市场上还有一种采用AMS1117（其应用电路及参数与LM1117基本一样）构成的成品降压电源模块，这种模块输出电压大都为固定的，最常用的就是3.3V和5.0V的，输出3V电压的不常见。
MEMORY存储芯片LM1117IMPX-3.3中文规格书
7.3 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
Input Voltage (VIN to GND) Junction Temperature (TJ)(1)
6 Pin Configuration and Functions
DCY Package 4-Pin SOT Top View
NDE Package 3-Pin TO-220
Top View
KTT Package 3-Pin TO-263
Top View
NDP Package 3-Pin TO-252
美光科技先进的产品广泛应用于移动计算机服务汽车网络安防工业消费类等领域为客户在这些多样化的终端应用提供针对性的解决方案
LM1117 800-mA, Low-Dropout Linear Regulator
1 Features
•1 For a newer drop-in alternative, see the TLV1117 • Available in 1.8 V, 2.5 V, 3.3 V, 5 V, and
PIN TO-252 WSON SOT-223
1
1
1
3
2, 3, 4
3
2 , TAB
5, 6, 7, TAB
2, 4
TO-263 1 3
2, TAB
Pin Functions
TO-220 1 3
2, TAB
I/O
DESCRIPTION
—
Adjust pin for adjustable output option. Ground pin for fixed output option.
LM1117_资料_new
订购须知
封装类型
TO-252 LM1117T-ADJ LM1117T-1.5 LM1117T-1.8 LM1117T-2.5 LM1117T-2.85 LM1117T-3.3 LM1117T5.0
SOT-223 LM1117-ADJ LM1117-1.5 LM1117-1.8 LM1117-2.5 LM1117-2.85 LM1117-3.3 LM1117-5.0
10mA≤ IOUT ≤ 1A,
1.5V≤ (VIN - VOUT) ≤ 12V
T A =125°C, 1000Hrs
3
最小
标准
0.1 0.2 3 6 3 6 3 6 3 6 3 7 5 10
最大
0.3 0.4 10 20 10 20 12 20 12 20 15 25 20 35
单位
% % mV mV mV mV mV mV mV mV mV mV mV mV
TA=25°C,10Hz≤ f ≤ 10kHz
0.003
%
热阻 辅助工程接口
15 °C/W
参数鉴定 （黑体字） 适用于整个工作温度范围
注释 1: 极限条件说明超出这个范围可能会损坏芯片。规格保证和测试条件请见电气特性。规格保证只适
用在列出的测试条件下。
注释 2: 线路调整率和负载调整率决定了最大功耗为1.2W。功耗取决于输入和输出的电压差以及输出电
3.3V≤VIN ≤12V
1.238 1.225
1.250 1.250
1.485 1.476 1.782 1.773 2.475 2.460 2.82 2.79 3.267 3.235 4.950 4.900
1.500 1.500 1.800 1.800 2.500 2.500 2.850 2.850 3.300 3.300 5.000 5.000 0.015 0.035
LM1117中文资料
PSRR fRIPPLE=120Hz, (VIN-VOUT)=3V, VRIPPLE=1VPP
6 12 mV 1.00 1.20 1.05 1.25 V 1.10 1.30
5 10 mA
60 75
dB
Iadj
60 120 μA
0≤ IOUT≤1A, 1.4V ≤VIN-VOUT≤10V
0.2 5 μA
推荐工作条件
参数 输入电压 工作结温范围
符号 VIN TJ
范围 15
-40 ~ +125
单位 V °C
电气特性(除非特别指定，否则黑色字体所示的参数，Tamb=25°C，正常工作结温范围 -40°C ~125°C。)
参数 基准电压
输出电压
符号
测试条件
最小值 典型值 最大值 单位
AMS1117-ADJ,
为了确保ＡＭＳ1117的稳定性，对可调电压版本，输出需要连接一个至少22μF的钽电容。对于固 定电压版本，可采用更小的电容，具体可以根据实际应用确定。通常，线性调整器的稳定性随着 输出电流增加而降低。
典型应用电路图
AMS1117
图 1. 典型固定输出电压
VIN 10 F
AMS1117-ADJ
VIN
VOUT
V
0≤IOUT≤1A, 4.25V≤VIN ≤10V
2.790 2.850 2.910
0≤IOUT≤500mA, VIN =4.10V
2.790 2.850 2.910
AMS1117-3.0,
IOUT=10mA, VIN=4.5V,TJ=25°C , 2.970 3.000 3.030 V
VOUT 0≤IOUT≤1A, 4.4V≤VIN≤10V
lm1117使用说明
l m1117使用说明-CAL-FENGHAI.-(YICAI)-Company One1概述LM1117是一个低压差电压调节器系列。
其压差在输出，负载电流为800mA时为。
它与国家半导体的工业标准器件LM317有相同的管脚排列。
LM1117有可调电压的版本，通过2个外部电阻可实现～输出电压范围。
另外还有5个固定电压输出（、、、和5V）的型号。
LM1117提供电流限制和热保护。
电路包含1个齐纳调节的带隙参考电压以确保输出电压的精度在±1%以内。
LM1117系列具有LLP、TO-263、SOT-223、TO-220和TO-252 D-PAK封装。
输出端需要一个至少10uF的钽电容来改善瞬态响应和稳定性。
替换型号X1117是IC网络超市自主的品牌，可以很好的替换LM1117。
X1117是一款正电压输出的低压降三端线性稳压电路，在1A输出电流下的压降为。
分为两个版本，固定电压输出版本和可调电压输出版本。
固定输出电压、、、、和可调版本的电压精度为1%；固定电压为的产品输出电压精度为2%。
内部集成过热保护和限流电路，适用于各类电子产品。
A1117是台湾亿光研发生产的高效率低压降三端线性稳压器，A1117提供电流限制和热保护，以确保芯片和功率稳定性系统。
而在芯片上保证输出电压精度在±2%。
同时也提供了固定电压输出版本和可调电压输出版本，可调版本能输出从到。
特性提供、、、、5V和可调电压的型号节省空间的SOT-223和LLP封装电流限制和热保护功能输出电流可达800mA线性调整率：% (Max)负载调整率：% (Max)温度范围－LM1117：0℃~125℃－LM1117I：-40℃~125℃应用模块可用于SCSI-2有源终端开关DC/DC转换器的主调压器高效线性调整器电池充电器电池供电装置典型应用电路图。
LM1117 中文PDF资料
VOUT 22 F
R2 VOUT=VREF x (1+R2/R1)+IADJ x R2
图 2. 典型可调输出电压
注：以上线路及参数仅供参考，实际的应用电路请在充分的实测基础上设定参数。
输出电压变化(%)
典型电气特性曲线
温度稳定性
负载瞬态反应（VOUT=5 V）
可调管脚电流 ( A)
参数符号测试条件最小值典型值最大值单位x1117adj基准电压vrefiout10mavinvout2vtj25c123812501262v10maiout1a14vvinvout10v122512501270x111712iout10mvin32vtj25c1176121224v10maiout1a30vvin10v1152121248x111715iout10mvin35vtj25c148515001515v10maiout1a30vvin10v147015001530x111718iout10mavin38vtj25c178218001818v0iout1a32vvin10v176418001836输出电压voutx111725iout10mavin45vtj25c247525002525v0iout1a39vvin10v245025002550x111733iout10mavin5vtj25c326733003333v0iout1a475vvin10v323533003365x111750iout10mavin7vtj25c49505000505v0iout1a65vvin12v49005000510输出电压温度稳定性tsout03vinminvin12v线性调整rline37mvvoutfixedadjiout10ma负载调整rload10maiout1avoutfixedadj612mviout100ma100120漏失电压vdropiout500ma105125viout1a110130静态电流iq425vvin65v510mafripple120hzvinvout3v纹波抑制比psrr6075dbvripple1vpp可调管脚电流iadj60120a可调管脚电流变化0iout1a14vvinvout10v025a温保点tsd150c限流点ilimit121415ax1117参数符号测试条件最小值典型值最大值单位温度稳定性05长期稳定性tamb125c1000hrs0
HTC LM1117pdf
FEATURES● Output Current up to 1 A● Low Dropout Voltage ( 1.2V at 1A Output Current )● Three Terminal Adjustable(ADJ) or Fixed 1.2V,1.5V, 1.8V, 2.5V, 2.85V, 3.3V, 5.0V● Line Regulaion typically at 0.1% max ● Load Regulaion typically at 0.2% max ● Internal Current and Terminal Protection ● Maximum Input Voltage - 15V● Surface Mount Package SOT-223, TO-252, SOT-89● 100% Thermal Limit Burn-InAPPLICATIONORDERING INFORMATION● Active SCSI Terminators● Portable/Plan Top/Notebook Computers ● High Efficiency Linear Regulators ● SMPS Post Regulators● Mother B/D Clock Supplies ● Disk Drives● Battery Chargers( X.X=Output Voltage=1.2V,1.5V, 1.8V, 2.5V, '3.3V, 5.0V, Adjustable=ADJ)DESCRIPTIONThe LM1117 is a low power positive-voltage regulator designed to meet 1A output current and comply with SCSI-II specifications with a fixed output voltage of 2.85V. This device is an excellent choice for use in battery-powered applications, as active terminators for the SCSI bus, and portable computers.The LM1117 features very low quiescent current and very low dropout voltage of 1V at a full load and lower as output current decreases. LM1117 is available as an adjustable or fixed 1.5V, 1.8V, 2.5V, 3.3V, and 5.0V output voltages.The LM1117 is offered in a 3-pin surface mount package SOT-223, TO-252 & SOT-89. The output capacitor of 10㎌ or larger is needed for output stability of LM1117 as required by most of the other regulator circuits.Jan. 2007 - Rev 1.0HTCPackageSOT-223LM1117S-XX LM1117RS-ADJTO-252LM1117RS-XX SOT-89LM1117F-ADJLM1117F-XXLM1117S-ADJDevice (Marking)SOT-223 PKGTO-252 PKGABSOLUTE MAXIMUM RATINGSTHERMAL DATATYPICAL APPLICATIONFIXED OUTPUT VOLTAGESYMBOLR θJA PARAMETERThermal Resistance Junction-Ambient℃Operating Junction Temperature RangeT OPR-40125℃Storage Temperature RangeT STG -65150V Lead Temperature (Soldering, 5 Seconds) T SOL 260℃DC Input VoltageV IN15SYMBOL MIN.MAX.TO-252SOT-89℃/WSOT-223UNIT CHARACTERISTICUNIT 13093315ELECTRICAL CHARACTERISTICS FOR LM1117S/RS/F-ADJ (ADJUSTABLE)(Refer to the test circuits, T J =25℃ C O =10㎌ unless otherwise specified)Reference VoltageI O = 10mA to 1A, V IN - V O = 1.5 to 13.75V Reference Voltage (T J =0~125℃)I O = 10mA to 1A, V IN - V O = 1.5 to 13.75V Line Regulation I O = 10mA , V IN - V O = 1.5 to 13.75V Load RegulationI O = 10mA to 1A, V IN - V O = 2 VTemperature Stability Long Term Stability1000 hrs, T J = 125℃Operating Input Voltage Adjustment Pin Current V IN - V O = 1.5 to 12V I O = 100㎃ Adjustment Pin Current ChangeMinimum Load Current V IN - V O = 12V Current LimitV IN - V O = 5VOutput Noise (%V O ) B = 10㎐ to 10㎑, T J = 25℃I O = 40㎃ , f = 120㎐, T J = 25℃V IN - V O = 3V, V NIPPLE = 1V PP I O = 100㎃I O = 500㎃I O = 1AThermal RegulationT A = 25℃ 30㎳ PulseELECTRICAL CHARACTERISTICS FOR LM1117S/RS/F-1.2V(Refer to the test circuits, T J =25℃ C O =10㎌ unless otherwise specified)Output Voltage V IN = 3.2 I O = 0㎃ to 1AOutput Voltage V IN =2.5 to 12V, I O =0㎃ to 1A (Tj = 0~125℃)Line Regulation I O = 10mA , V IN - V O = 1.5 to 13.75V Load RegulationI O = 10mA to 1A, V IN - V O = 2 VTemperature Stability Long Term Stability1000 hrs, T J = 125℃ Operating Input Voltage Quiescent Current V IN - Vo = 5V Current LimitV IN - V O = 5VOutput Noise (%V O ) B = 10㎐ to 10㎑, T J = 25℃I O = 40㎃ , f = 120㎐, T J = 25℃V IN - V O = 3V, V NIPPLE = 1V PP I O = 100㎃I O = 500㎃I O = 1AThermal RegulationT A = 25℃ 30㎳ Pulse%/W1.3V ㏈1.1V 0.0031.2V Dropout Voltage V D1.01.11.2Supply Voltage RejectionSVR6075I O10001250E N㎃V V IN I D 510%ΔV O 0.3%ΔV O 0.10.2151.248V %ΔV O 0.20.4%ΔV O %PARAMETERTEST CONDITIONV O1.176 1.224V V O 1.152SYMBOLMIN.TYP.1.20MAX.UNIT V MIN.TYP.MAX.UNIT 1.238 1.25 1.262PARAMETERSYMBOL V REFTEST CONDITIONV ΔV O 0.10.2%V REF 1.2191.281%ΔV O 0.5%ΔV O 0.20.4%V IN 15V ΔV O 0.3E N0.003 Dropout Voltage 1.1 1.21.21.0 1.1㎃V %I O100012501600V V D505510I O(MIN)I ADJ 120V 1.3㎂㎂㎃%/W0.003㏈Supply Voltage RejectionSVR7560ΔI ADJ V IN - V O = 1.5 to 12V, I O = 10mA to 1A 0.50.51600㎃0.003ELECTRICAL CHARACTERISTICS FOR LM1117S/RS/F-1.5(Refer to the test circuits, T J =25℃ C O =10㎌ unless otherwise specified)Output Voltage V IN = 3.0 to 12V, I O = 0㎃ to 1A Output Voltage V IN =3.0 to 12V, I O =0㎃ to 1A (Tj = 0~125℃) Line Regulation V IN = 3.0 to 12V, I O = 0㎃ Load RegulationV IN = 3.5V, I O = 0 to 1A Temperature Stability Long Term Stability1000 hrs, T J = 125℃ Operating Input Voltage I O = 100㎃ Quiescent Current V IN - Vo = 5V Current LimitV IN - Vo = 5VOutput Noise Voltage B = 10㎐ to 10㎑, T J = 25℃I O = 40㎃ , f = 120㎐, T J = 25℃V IN = 5.5V, V NIPPLE = 1V PP I O = 100㎃I O = 500㎃I O = 1AThermal RegulationT A = 25℃ 30㎳ PulseELECTRICAL CHARACTERISTICS FOR LM1117S/RS/F-1.8(Refer to the test circuits, T J =25℃ C O =10㎌ unless otherwise specified)Output Voltage V IN = 3.3 to 12V, I O = 0㎃ to 1A Output Voltage V IN =3.3 to 12V, I O =0㎃ to 1A (Tj = 0~125℃) Line Regulation V IN = 3.3 to 12V, I O = 10㎃ Load RegulationV IN = 3.8V, I O = 0 to 1A Temperature Stability Long Term Stability1000 hrs, T J = 125℃ Operating Input Voltage I O = 100㎃ Quiescent Current V IN - Vo = 5V Current LimitV IN - Vo = 5VOutput Noise Voltage B = 10㎐ to 10㎑, T J = 25℃I O = 40㎃ , f = 120㎐, T J = 25℃V IN = 5.5V, V NIPPLE = 1V PP I O = 100㎃I O = 500㎃I O = 1AThermal RegulationT A = 25℃ 30㎳ Pulse1.3V 0.003%/W1.1V 1.1 1.2V Dropout Voltage V D1.01.2㎶ Supply Voltage RejectionSVR6075㏈E N100㎃I O100012501600㎃I D 5%V IN 12V ΔV O 0.3㎷ΔV O 0.5%ΔV O 0.2V ΔV O 0.10.2㎷V O 1.764PARAMETERSYMBOLTEST CONDITIONMIN.㎃E N100㎶I O1000125016001.8361.8 1.8180.4100.003%/WV O1.782TYP.MAX.UNIT V PARAMETERSYMBOLTEST CONDITIONMIN.TYP.MAX.UNIT V V O 1.4701.530V V O1.485 1.5 1.515%ΔV O 0.20.4%ΔV O 0.10.2%ΔV O 0.3%ΔV O 0.5V I D 510㎃V IN 12 Supply Voltage RejectionSVR 6075㏈Dropout Voltage V D1.0 1.1V 1.1 1.2V 1.2 1.3VELECTRICAL CHARACTERISTICS FOR LM1117S/RS/F -2.5(Refer to the test circuits, T J =25℃ C O =10㎌ unless otherwise specified)Output Voltage V IN = 4.0 to 12V, I O = 0㎃ to 1A Output Voltage V IN =4.0 to 12V, I O =0㎃ to 1A (Tj = 0~125℃) Line Regulation V IN = 4.0 to 12V, I O = 10㎃ Load RegulationV IN = 4.5V, I O = 0 to 1A Temperature Stability Long Term Stability1000 hrs, T J = 125℃ Operating Input Voltage I O = 100㎃ Quiescent Current V IN - Vo = 5V Current LimitV IN - Vo = 5VOutput Noise Voltage B = 10㎐ to 10㎑, T J = 25℃I O = 40㎃ , f = 120㎐, T J = 25℃V IN = 5.5V, V NIPPLE = 1V PP I O = 100㎃I O = 500㎃I O = 1AThermal RegulationT A = 25℃ 30㎳ PulseELECTRICAL CHARACTERISTICS FOR LM1117S/RS/F -2.85(Refer to the test circuits, T J =25℃ C O =10㎌ unless otherwise specified)Output Voltage V IN = 4.4 to 12V, I O = 0㎃ to 1A Output Voltage V IN =4.4 to 12V, I O =0㎃ to 1A (Tj = 0~125℃) Line Regulation V IN = 4.4 to 12V, I O = 10㎃ Load RegulationV IN = 4.85V, I O = 0 to 1A Temperature Stability Long Term Stability1000 hrs, T J = 125℃ Operating Input Voltage I O = 100㎃ Quiescent Current V IN - Vo = 5V Current LimitV IN - Vo = 5VOutput Noise Voltage B = 10㎐ to 10㎑, T J = 25℃I O = 40㎃ , f = 120㎐, T J = 25℃V IN = 5.85V, V NIPPLE = 1V PP I O = 100㎃I O = 500㎃I O = 1AThermal RegulationT A = 25℃ 30㎳ PulseV O2.475ΔV O I D V OV O 2.4502.5 2.525V UNIT MAX.TYP.0.10.2V 2.550PARAMETERSYMBOLTEST CONDITIONMIN.0.2%%%0.40.10.2ΔV O 0.5ΔV O 2.85%V IN 12V ΔV O 0.3510㎃TYP.MAX.UNIT V 1.1PARAMETERSYMBOLTEST CONDITIONMIN.100V ㎃2.878㎶㏈V 1.2I O100012501600Supply Voltage RejectionSVR 6075E NDropout Voltage V D1.01.21.10.41.3V %/W%2.907V 0.010.1V O %ΔV O 0.5%ΔV O ΔV O %V ㎃2.8212.793120.2ΔV O 0.3I O100012501600V IN ㎃I D 510㎶ Supply Voltage RejectionSVR6075㏈E N100Dropout Voltage V D1.01.2 1.1V 1.1 1.2V 1.3V 0.003%/WELECTRICAL CHARACTERISTICS FOR LM1117S/RS/F -3.3(Refer to the test circuits, T J =25℃ C O =10㎌ unless otherwise specified)Output Voltage V IN = 4.8 to 12V, I O = 0㎃ to 1A Output Voltage V IN =4.8 to 12V, I O =0㎃ to 1A (Tj = 0~125℃) Line Regulation V IN = 4.8 to 12V, I O = 10㎃ Load RegulationV IN = 5.3V, I O = 0 to 1A Temperature Stability Long Term Stability1000 hrs, T J = 125℃ Operating Input Voltage I O = 100㎃ Quiescent Current V IN - Vo = 5V Current LimitV IN - Vo = 5VOutput Noise Voltage B = 10㎐ to 10㎑, T J = 25℃I O = 40㎃ , f = 120㎐, T J = 25℃V IN = 6.3V, V NIPPLE = 1V PP I O = 100㎃I O = 500㎃I O = 1AThermal RegulationT A = 25℃ 30㎳ PulseELECTRICAL CHARACTERISTICS FOR LM1117S/RS/F -5.0(Refer to the test circuits, T J =25℃ C O =10㎌ unless otherwise specified)Output Voltage V IN = 6.5 to 15V, I O = 0㎃ to 1A Output Voltage V IN =6.5 to 15V, I O =0㎃ to 1A (Tj = 0~125℃) Line Regulation V IN = 6.5 to 15V, I O = 10㎃ Load RegulationV IN = 7.0V, I O = 0 to 1A Temperature Stability Long Term Stability1000 hrs, T J = 125℃ Operating Input Voltage I O = 100㎃ Quiescent Current V IN - Vo = 5V Current LimitV IN - Vo = 5VOutput Noise Voltage B = 10㎐ to 10㎑, T J = 25℃I O = 40㎃ , f = 120㎐, T J = 25℃V IN = 6.3V, V NIPPLE = 1V PP I O = 100㎃I O = 500㎃I O = 1AThermal RegulationT A = 25℃ 30㎳ PulseTYP.MAX.UNIT PARAMETERSYMBOLTEST CONDITIONMIN.V V O 3.2343.366V V O3.267 3.3 3.333%ΔV O 0.20.4%ΔV O 0.10.2%ΔV O 0.3%ΔV O 0.5V I D 510㎃V IN 12㎃E N100㎶I O100012501600Supply Voltage RejectionSVR6075㏈ Dropout Voltage V D1.0 1.1V 1.1 1.2V 1.2 1.3V %/W0.003UNIT V O4.9505.0 5.050V SYMBOLMIN.TYP.MAX.V ΔV O 0.10.2%V O 4.9005.100%ΔV O 0.5%ΔV O 0.20.4%15V 0.31600㎃100㎶10001250510PARAMETERTEST CONDITIONV IN ΔV O ㎃I OE NSupply Voltage RejectionSVR6075㏈I D Dropout Voltage V D1.01.2 1.1V 1.1 1.2V 1.3V 0.003%/WAPPLICATION CIRCUITSJan. 2007 - Rev 1.0 HTCTypical Performance CharacteristicsV i n -V o u t , D R O P O U T V O L T A G E (V )0.2 0.4 0.6 0.81.01.21.41.601002003004005006008001000Iout, OUTPUT CURRENT(mA)FIG 2. DROPOUT VOLTAGE vs OUTPUT CURRENTV o u t , O U T P U T V O L T A G E C H A N G E (%)-2.0-1.5-1.0-0.5 00.51.01.52.0-50-25-0255075100125150T A -FREE-AIR TEMPERATURE-℃FIG 1. OUTPUT VOLTAGE CHANGE vs TEMPERATURE(℃)I a d j , A D J U S T P I N C U R R E N T1050 60-50-25-0255075100125150T A, AMBIENT TEMPERATURE (℃)FIG 5. ADJ PIN CURRENT vs TEMPERATURE (℃)I o u t , O U T P U T C U R R E N T (A )0.51.01.52.024810121618Vin - Vout, VOLTAGE DIFFERENTIAL (V)FIG 3. OUTPUT SHORT CIRCUIT CURRENTvs DIFFERENTIAL VOLTAGE1.01.11.2 1.3 1.41.51.61.71.8-50-25-0255075100125150T A - AMBIENT TEMPERATURE (℃)FIG 4. OUTPUT SHORT CIRCUIT CURRENTvs TEMPERATURE-50-25-0255075100125150T A, AMBIENT TEMPERATURE(℃)FIG 6. QUIESCENT CURRENT CHANGE vs TEMPERATURE(℃)6120I o u t , O U T P U T C U R R E N T (A )401A L.D.O. VOLTAGE REGULATORLM1117S/RS/FMaximum Output Current Capability The LM1117 can deliver a continuous current of 1A over the full operating junction temperature range. However, the current is limited by the restriction of power dissipation which differs from packages. A heat sink may be required depending on the maximum power dissipation and maximum ambient temperature of application. With respect to th applied package, the maximum output current of 1A may be still undeliverable due to the restriction of the power diss of LM1117. Under all possible conditions, the junction temperature must be within the range specified under operating conditions. The temperatures over the device are given by:T C = T A + P D X θCAT J = T C + P D X θJCT J = T A + P D X θJAT J is the junction temperature, T C is the case temperature, T A is the ambient temperature, P D is the total power dissi of the device, θCA is the thermal resistance of case-to-ambient, θJC is the thermal resistance of junction-to-case,and θJA is the thermal resistance of junction to ambient. The total power dissipation of the device is given by P D = P IN – P OUT = (V IN X I IN )–(V OUT X I OUT )= (V IN X (I OUT +I GND )) – (V OUT X I OUT ) = (V IN - V OUT ) X I OUT + V IN X I GNDwhere I GND is the operating ground current of the device which is specified at the Electrical Characteristics. The max allowable temperature rise (TRmax) depends on the maximum ambient temperature (TAmax) of the application and the maximum allowable junction temperature (TJmax):T Rmax = T Jmax – T AmaxThe maximum allowable value for junction-to-ambient thermal resistance, θJA , can be calculated using the formula:θJA = T Rmax / P DLM1117 is available in SOT223, TO252 packages. The thermal resistance depends on amount of copper area or he and on air flow. If the maximum allowable value of θJA calculated above is over 130°C/W for SO-223 package, over for TO252 package, no heat sink is needed since the package can dissipate enough heat to satisfy these requirements. If the value for allowable θJA falls near or below these limits, a heat sink or proper area of cop plane is required. In summary, the absolute maximum ratings of thermal resistances are as follow:Absolute Maximum Ratings of Thermal ResistanceNo heat sink / No air flow / No adjacent heat source / 0.066 inch 2 copper area Jan. 2007 - Rev 1.0 HTCMax. Rating Unit Thermal Resistance Junction-To-Ambient / TO252θJA-TO25293°C/W Thermal Resistance Junction-To-Ambient / SOT223θJA-SOT223130°C/W Characteristic Symbol11Thermal Resistance Junction-To-Ambient / SOT89θJA-SOT89315°C/W。
lm1117稳压电路图
lm1117稳压电路图LM1117是一个低压差电压调节器系列。
其压差在1.2V输出，负载电流为800mA时为1.2V。
它与国家半导体的工业标准器件LM317有相同的管脚排列。
LM1117有可调电压的版本，通过2个外部电阻可实现1.25～13.8V输出电压范围。
另外还有5个固定电压输出（1.8V、2.5V、2.85V、3.3V和5V）的型号。
概述LM1117提供电流限制和热保护。
电路包含1个齐纳调节的带隙参考电压以确保输出电压的精度在±1%以内。
LM1117系列具有LLP、TO-263、SOT-223、TO-220和TO-252 D-PAK封装。
输出端需要一个至少10uF的钽电容来改善瞬态响应和稳定性。
采用SOT-223和LLP封装，输出电流可达800mA，负载调整率：0.4% （Max），线性调整率：0.2% （Max）。
特点：◆1.8V、2.5V、3.3V的固定电压输出和可调整电压输出◆低压差，输入电压范围广◆输出电压稳定性高◆内置限流和热保护功能◆输出电流 1A◆典型线性调整率 0.3%◆典型负载调整率 0.5%◆温度范围0℃-125℃◆提供SOT-223和TO-252封装形式，符合RoHS标准应用范围：◆开关DC/DC转换器的快速调整器◆高效的线性调整器◆电池电源设备◆电池充电器◆小型计算机系统终端接口◆笔记本电源设备LPC2290微控制器是基于16位和32位ARM7TDMI-S CPU的实时仿真与嵌入式跟踪支持。
对于关键代码大小应用程序，可供选择16位拇指模式减少了30%以上的代码，以最小的性能损失。
其144引脚封装，低功耗，各32位定时器，8通道10位ADC，两个先进的CAN通道，PWM通道和多达九个外部中断引脚这种微控制器特别适用于汽车和工业控制。
应用程序以及医疗系统和容错维护总线。
这个LPC2290提供多达76个不同的总线配置。
具有广泛的附加串行通信接口，也适用于通信网关和协议转换器以及许多其他通用应用程序。
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
1A Adjustable/Fixed Low Dropout Linear Regulator- Low dropout voltage- Load regulation: 0.2% typical - Optimized for Low V oltage - On-chip thermal limiting- Standard SOT-223 and TO-252 packages- Three-terminal adjustable or fixed low dropout 1.2V ,1.5V ,1.8V , 2.5V , 2.85V , 3.3V , 5V . Regulators- Active SCSI terminators- High efficiency linear regulators- Post regulators for switching supplies - Battery chargers- 12V to 5V linear regulators - M otherboard clock suppliesThe AMS 1117-ADJ and AMS 1117-1.2,-1.5,-1.8,-2.5,-2.85, -3.3 and-5 are low dropout three-terminal regulators with 1A output current capability. These devices have been optimized for low voltage where transient response and minimum input voltage are critical. The 2.85V version is designed specifically to be used in Active Terminators for SCSI bus.On-chip thermal limiting provides protection against any combination of overload and ambient temperatures that would create excessive junction temperatures.Unlike PNP type regulators where up to 10% of the output current is wasted as quiescent current, the quiescent cur-rent of the AMS 1117 flows into the load, increasing effi-ciency.The AMS 1117 series regulators are available in the indus-try-standard SOT-223 and TO-252 power packages.Key FeaturesApplicationsGeneral DescriptionTypical ApplicationNotice: The distance between V out pin and Capacitor should not exceed 4cm for excellent performanceFigure 1. Typical Applications of AMS 11171A Adjustable/Fixed Low Dropout Linear RegulatorPin Assignments*With package soldered to 0.5 square inch copper area over backside ground plane or internal power plane, ΘJA can vary from 30°C/W to more than 50°C/W. Other mounting techniques may provide better thermal resistance than 30°C/W.Absolute Maximum RatingsFigure 2. Pin Assignments of AMS 1117ParameterMin.Max.UnitV IN 18 V(V IN – V OUT ) * I OUTSee Figure 3Operating Junction Temperature Range -20 125°C Storage Temperature Range-65150°C Lead Temperature (Soldering, 10 sec.) 300°C1A Adjustable/Fixed Low Dropout Linear RegulatorTypicals and limits appearing in normal type apply for T J =25℃.Limits appearing in Boldface type apply over the entire junction temperature for operation, -20℃to 125℃.Electrical CharacteristicBlock DiagramThermal LimitCurrent LimitV OUTV INSubstrateGND (fixed output) ADJ. (adjustable output)Figure 3. Block Diagram of AMS 1117SymbolParameterConditionsMin (Note 2) Typ (Note 1) Max(Note 2)UnitsV REFReference VoltageAMS 11171.5V<=(V IN -V OUT )<=7V,10mA<=I OUT <=1A1.225 1.250 1.275 VV OUT Output Voltage10mA<=I OUT <=1AI OUT = 10mA, V IN = 3.2V AMS 1117-1.2 ,2.7V<= V IN <=8.2V 1.176 1.152 1.200 1.200 1.224 1.248 V AMS 1117-1.5 ,3.0V<= V IN <=8.5V1.4701.5001.530VAMS 1117-1.8 ,3.3V<= V IN <=8.8V 1.764 1.800 1.836 VAMS 1117-2.5 ,4V<= V IN <= 9.5V 2.450 2.500 2.550 V AMS 1117-2.85 , 4.35V <= V IN <= 9.85V 2.793 2.850 2.907 V AMS 1117-3.3 , 4.8V<= V IN <=10.3V 3.234 3.300 3.366 V AMS 1117-5.0,6.5V<=V IN <= 12V4.9005.0005.100V1A Adjustable/Fixed Low Dropout Linear RegulatorTypicals and limits appearing in normal type apply for T J =25℃.Limits appearing in Boldface type apply over the entire junction temperature for operation, -20℃ to 125℃.Electrical Characteristic(Continued)SymbolParameter ConditionsMin (Note 2)Typ (Note 1) Max (Note 2) Units △V OUTLine Regultion (Note 3)I OUT =10mA ,(V OUT +1.5V)<=V IN <=12V 0.035 0.2 % Load Regultion (Note 3) V IN -V OUT =2V,10mA<= I OUT <=1A,0.2 0.7 % AMS 1117-1.2V IN -V OUT =2V,10mA<= I OUT <=1A,0.2 1 % V IN -V OUTDropout Volage I OUT =1A,△V REF =1% 1.100 1.250 V I LimitCurrent Limit V IN -V OUT = 2V, T J =25℃1.1 1.5A Minimum Load Current (Note 4) AMS 1117-ADJ1.5V<=(V IN -V OUT )<=10V10mA Quiescent CurentV IN =V OUT +1.25V 5 13 mA Thermal Regulation T A = 25°C, 30ms pulse 0.01 0.1 %/W RippleRejection f=120Hz,V IN -V OUT =3V, V Ripple =1V PP60 72 dB Adjust Pin Current50120µAAdjust Pin CurrentChange 1.5V<=V IN -V OUT <=7V, 10mA<=I OUT <=1A0.2 5 µATemperature Stability0.5 % Long Term StabilityT A = 125°C, 1000hrs.0.3%1A Adjustable/Fixed Low Dropout Linear RegulatorNote 1: Typical Values represent the most likely parametric norm. Note 2: All limits are guaranteed by testing or statistical analysis.Note 3: Load and line regulation are measured at constant junction room temperature. Note 4: The minimum output current required to maintain regulation.Typical Performance CharacteristicsTypicals and limits appearing in normal type apply for T J =25℃.Limits appearing in Boldface type apply over the entire junction temperature for operation, -20℃to 125℃.Electrical Characteristic(Continued)Symbol ParameterConditionsMin (Note 2) Typ (Note 1) Max (Note 2)UnitsI LimitRMS Output Noise(% ofV OUT )T A = 25°C, 10Hz<= f <=10kHz0.003 % Thermal Resistance, Junctionto CaseSOT-223 15 ℃/W TO-252 3 ℃/W Thermal Shutdown Junction Temperature155 ℃ Thermal Shutdown Hysteresis25℃Output Current ( A )0 0.2 0.4 0.6 0.8 1.01.5 1.4 1.3 1.2 1.0 0.9 0.8 0.7 0.6 0.5 0D r o p o u t V o l t a g e ( V )Figure 4. Dropout Voltage VS. Output Current1A Adjustable/Fixed Low Dropout Linear RegulatorTypical Performance Characteristics(Continued)Figure 6. Output Voltage VS. TemperatureO u t p u t V o l t a g e ( V )3.70 3.65 3.603.553.50 3.45 3.40 3.35 3.30 3.253.20Junction Temperature ( ℃ )-75 –50 –25 0 25 50 75 100 125 150 175Figure 5. Reference Voltage VS. TemperatureR e f e r e n c e V o l t a g e ( V )0.260 1.255 1.250 1.245 1.240 1.235 1.225 1.220 1.215 1.210Junction Temperature ( ℃ )-75 –50 –25 0 25 50 75 100 125 150 175Figure 7. Minimum Load Current VS. TemperatureM i n i m u m L o a d C u r r e n t ( m A )5 4 3 2 1Junction Temperature ( ℃ ) -75 –50 –25 0 25 50 75 100 125 150 175Figure 8. ADJ Pin Current VS. TemperatureA D J P i n C u r r e n t ( µA ) 100 90 807060 50 40 30 20 10 0Junction Temperature ( ℃ ) -75 –50 –25 0 25 50 75 100 125 150 175Note:AMS 1117 OnlyAMS11171AAdjustable/Fixed Low Dropout Linear RegulatorMechanical Dimensions4-Lead SOT-223 PackageSymbolInches Millimeters NotesMin.Max.Min. Max.A Ñ .071 Ñ 1.80 A1 Ñ .181 Ñ 4.80B .025 .033 .064 .840 c Ñ 0.90 Ñ 2.29 D .248 .264 6.30 6.71 E .130 .148 3.30 3.71 e .115 .124 2.95 3.15 F .033 .041 .840 1.04 H .264 .287 6.71 7.29 I .0121 Ñ .310 Ñ J Ñ 10° Ñ 10° K 10° 16° 10° 16° L.0008 .0040 .0203 .1018 M 10° 16° 10° 16° N.010.014.250.360Figure 9. 4-Lead SOT-223 Package1A Adjustable/Fixed Low Dropout Linear RegulatorMechanical Dimensions(Continued)3-Lead TO-252 PackageNotes:1. Dimensions are exclusive of mold flash, metal burrsor interlead protrusion.2. Stand off-height is measured from lead tip with ref. toDatum –B-.3. Foot length is measured with ref. to Datum –A– withlead surface. 4. Thermal pad contour optional within dimension b3 and L3.5. Formed leads to be planar with respect to one anotherat seating place –C-.6. Dimensions and tolerances.SymbolInchesMillimetersNotesMin. Max.Min. Max.A .086 .094 2.19 2.39 b .025 .035 0.64 0.89 b2 .030 .045 0.76 1.14 b3 .205 .215 5.12 5.46 4 c .018 .024 0.46 0.61 c2 .018 .023 0.46 0.58 D .210 .245 5.33 6.22 1E .250 .265 6.35 6.73 1e .090 BSC 2.29 BSCH .370 .410 9.40 10.41 L .055 .070 1.40 1.78 3 L1 .108 REF 2.74 REFL3 .035 .080 0.89 2.03 4 L4.025.0400.641.02Figure 10. 3-Lead TO-252 Package1A Adjustable/Fixed Low Dropout Linear R egulatorAdvanced Monolithic Systems The " " logo is a registered trademark of Advanced Monolithic Systems.All other company and product names are trademarks of their respective ownersOrdering InformationPackage Temperature Range Part Number Output Voltage Packing Marking Transport MediaSOT －223－２０℃ - +125℃ AMS 1117-1.2 1.2V AMS 1117 1.2 2.5K Tape and Reel －２０℃ - +125℃ AMS 1117-1.5 1.5V AMS 1117 1.5 2.5K Tape and Reel -20℃ - +125℃ AMS 1117-1.8 1.8V AMS 1117 1.8 2.5K Tape and Reel-20℃ - +125℃ AMS 1117-2.5 2.5V AMS 1117 2.5 2.5K Tape and Reel -20℃ - +125℃ AMS 1117-2.85 2.85V AMS 1117 2.8 2.5K Tape and Reel -20℃ - +125℃ AMS 1117-3.3 3.3V AMS 1117 3.3 2.5K Tape and Reel -20℃ - +125℃ AMS 1117-5 5V AMS 1117 5 2.5K Tape and Reel -20℃ - +125℃ AMS 1117 Adjust AMS 1117 2.5K Tape and Reel TO －252-20℃ - +125℃ AMS 1117-1.2 1.2V AMS 1117 1.2 2.5K Tape and Reel -20℃ - +125℃ AMS 1117-1.5 1.5V AMS 1117 1.5 2.5K Tape and Reel -20℃ - +125℃ AMS 1117-1.8 1.8V AMS 1117 1.8 2.5K Tape and Reel-20℃ - +125℃ AMS 1117-2.5 2.5V AMS 1117 2.5 2.5K Tape and Reel -20℃ - +125℃ AMS 1117-2.85 2.85V AMS 1117 2.8 2.5K Tape and Reel -20℃ - +125℃ AMS 1117-3.3 3.3V AMS 1117 3.3 2.5K Tape and Reel -20℃ - +125℃ AMS 1117-5 5.0V AMS 1117 5 2.5K Tape and Reel -20℃ - +125℃ AMS 1117CD Adjust AMS 1117CD 2.5K Tape and ReelDisclaimer:• AMS reserves the right to make changes to the information herein for the improvement of the design and performancewithout further notice! Customers should obtain the latest relevant information before placing orders and should verify that such information is complete and current.• All semiconductor products malfunction or fail with some probability under special conditions. When using AMS productsin system design or complete machine manufacturing, it is the responsibility of the buyer to comply with the safety standards strictly and take essential measures to avoid situations in which a malfunction or failure of such AMS products could cause loss of body injury or damage to property.• AMS will supply the best possible product for customers!。