AMS1117-ADJ DATASHEET原厂规格书
低压差稳压器--AMS1117芯片简介
低压差稳压器--AMS1117芯⽚简介结构从内部框图可以看出，ASM1117提供电流限制和热保护（TSD），以防环境温度造成过⾼的结温。
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。
ADJ引脚是可调整电压引脚，⽤来接⼊可调电阻，调出你所需要的电压。
基本⼯作原理AMS1117是⼀个低漏失电压调整器，它的稳压调整管是由⼀个PNP驱动的NPN管组成的，漏失电压定义为： VDROP = VBE+ VSAT。
AMS1117有固定和可调两个版本可⽤，输出电压可以是：1.2V，1.5V，1.8V，2.5V，2.85V， 3.0V，3.3V，和5.0V。
⽚内过热切断电路提供了过载和过热保护，以防环境温度造成过⾼的结温。
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。
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。
AMS1117-3.3参数：绝对最⼤额定值：20V⼯作结温范围：-40~125°C输⼊电压：15V焊接温度（25秒）：265°C存储温度：-65~150°CAMS1117-3.3电⽓特性：输出电压：3.267~3.333V（0≤IOUT≤1A，4.75V≤VIN≤12V）线性调整（最⼤）：10mV（4.75V≤VIN≤12V）负载调节（最⼤）：15mV（VIN=5V，0≤IOUT≤1A）电压差（最⼤）：1.3V电流限制：900~1500mA静态电流（最⼤）：10mA纹波抑制（最⼩）：60dB。
AMS1117-5.0 DATASHEET原厂规格书
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 1117Symbol ParameterConditionsMin (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 OutputVoltage 10mA<=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 3.60 3.55 3.50 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. Temperature R 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 80 70 60 50 40 30 20 10 0Junction Temperature ( ℃ ) -75 –50 –25 0 25 50 75 100 125 150 175Note:AMS 1117 OnlyAMS11171A Adjustable/Fixed Low Dropout Linear RegulatorMechanical Dimensions4-Lead SOT-223 PackageSymbolInches MillimetersNotesMin.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!。
AMS1117-1.8 中文资料
AMS1117-3.0 AMS1117-3.0 AMS1117-3.3 AMS1117-3.3
AMS1117-5.0 AMS1117-5.0
AMS1117-ADJ AMS1117-2.85
AMS1117-1.2 AMS1117-3.0 AMS1117-1.5 AMS1117-3.3
AMS1117-1.8 AMS1117-5.0 AMS1117-2.5
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
IOUT=10mA
0.3
%
3
7 mV
Rload Vdrop
Iq
10mA≤IOUT≤ 1A,VOUT=Fixed/Adj IOUT=100mA IOUT=500mA IOUT=1A 4.25V≤VIN≤ 6.5V
PSRR fRIPPLE=120Hz, (VIN-VOUT)=3V, VRIPPLE=1VPP
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
2.940 3.000 3.060
AMS1117-3.3, IOUT=10mA, VIN=5V,TJ=25°C , 0≤IOUT≤1A, 4.75V≤VIN≤10V
LM1117 PDF 中文资料
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
0≤IOUT≤1A, 3.9V≤VIN ≤10V
2.450 2.500 2.550
（见下页）
ADVANCED MONOLITHIC SYSTEMS (translate by BONA 0755-82800289)
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AMS1117
（接上页）
参数
AMS1117-3.0 AMS1117-3.0 AMS1117-3.3 AMS1117-3.3
AMS1117-5.0 AMS1117-5.0
AMS1117-ADJ AMS1117-2.85
AMS1117-1.2 AMS1117-3.0 AMS1117-1.5 AMS1117-3.3
AMS1117-1.8 AMS1117-5.0 AMS1117-2.5
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
内部框图
ADVANCED MONOLITHIC SYSTEMS (translate by BONA 0755-82800289)
LM1117-adj中文资料
调 节 管 脚 电 流 10≤IOUT≤800mA
变化
1.4V≤VIN-VOUT≤10V
温度稳定性
长期稳定性 TA = 125℃, 1000 小时 RMS 输出噪声 VOUT 的百分比，10Hz≤f≤10kHz
续上表 最小值 典型值 最大值 单位
1
6 mV
1
6 mV
1
10 mV
0.2
0.4 %
1
10 mV
1.782 1.746
2.475 2.450
2.820 2.790 2.790
3.267 3.235
4.950 4.900
典型值 最大值 单位
1.250 1.262 V 1.250 1.270 V
1.800 1.818 V 1.800 1.818 V
2.500 2.525 V 2.500 2.550 V
1
10 mV
1
10 mV
1
10 mV
1
15 mV
1.10 1.20 V
1.15 1.25 V
1.20 1.30 V
800
1200 1500 mA
1.7
5 mA
5
10 mA
5
10 mA
5
10 mA
5
10 mA
5
10 mA
0.01 0.1 %/W
60
120 uA
0.2 0.5 0.3 0.003
5 uA % % %
工作参数
输入电压（VIN to GND）：15V 结温（TJ）范围： －LM1117： 0℃~125℃ －LM1117I： -40℃~125℃
LM1117 电气特性
符号
ams1117ADJ稳压电路如何调压？
ams1117ADJ稳压电路如何调压？
AMS1117AMS1117是一个正向低压降稳压器，在1A电流下压降为1.2V。
AMS1117有两个版本：固定输出版本和可调版本，固定输出电压为1.5V、1.8V、2.5V、2.85V、3.0V、3.3V、5.0V,具有1％的精度；固定输出电压为１．２Ｖ的精度为２％。
ams1117ADJ中的就是电源电压可调的ams1117，具体意思为：
ADJ是调节端口的代号。
是能够调节电流，使其稳定在额定的电流中，而不能够从12V调高到24V的。
这个管脚是电压调节脚，有些型号的开关稳压器是可以升压的，有些则只能降压。
DJ端工作原理就是接一个电阻到V out端作为采样，再接一个电阻接地，把输出电流控制在一个额定范围之内的作用。
电源上的ADJ是调节端口；一般在电源板上,ADJ是Adjust的缩写,表示可调节的意思。
+V表示电源的电压正极;+在这里是表示电源电压的极性;由此可以看出,电源板上此标志位置的电压是直流电压;(只有直流电压才有+和-的极性区分)。
合起来就是表示电源电压可调(+极)。
注1：最大允许功耗是最大工作结温度Tj*（max）、成对热阻ja和环境温度TAMB的函数。
最大允许值
在给定的环境温度（max）（TJ max）TAMB（THETA）/JA的功率消耗，超过最大允许功耗将导致芯片温度过高，并且调节器将进入过热切削状态。
不同包装类型的耐热性不同于THETA JA的热阻，这是由包装技术决定的。
AMS1117中文资料
AMS1117-3.0 AMS1117-3.0 AMS1117-3.3 AMS1117-3.3
AMS1117-5.0 AMS1117-5.0
AMS1117-ADJ AMS1117-2.85
AMS1117-1.2 AMS1117-3.0 AMS1117-1.5 AMS1117-3.3
AMS1117-1.8 AMS1117-5.0 AMS1117-2.5
封装 SOT-89-3
打印名称 SAJ S12 S15 S18 S25 S28 S30 S33 S50
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AMS1117
产品规格分类（温度范围：-40°C~ 125°C）
线性瞬态响应（VOUT=2.85V）
线性瞬态响应（VOUT=5 V）
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典型电气特性曲线 （续）
纹波抑制 VS 电流
封装外形图
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
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
AMS1117 中文资料
封装 SOT-223
打印名称
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 AMS1117-2.85 AMS1117-3.0 AMS1117-3.3 AMS1117-5.0
内部框图
AMS Crop. (translate by BONA 0755-82800289)
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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)
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。
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。
LM1117-adj中文资料
1.238 1.200
VOUT
∆VOUT 线性调整率
∆VOUT 负载调整率
VIN-VOUT 压差
ILIMIT
电流限制 最小负载电流 空载电流
热调节 调节管脚电流
LM1117I-3.3 IOUT = 10mA,VIN-VOUT =5V, TJ = 25℃ 0≤IOUT≤800mA, 4.75V≤VIN≤10V LM1117I-5.0 IOUT = 10mA,VIN-VOUT =7V, TJ = 25℃ 0≤IOUT≤800mA, 6.5V≤VIN≤12V LM1117I-ADJ IOUT = 10mA, 1.5V≤VIN-VOUT≤13.75V LM1117I-3.3 IOUT = 0mA, 4.75V≤VIN≤15V LM1117I-5.0 IOUT = 0mA, 6.5V≤VIN≤15V LM1117I-ADJ VIN-VOUT = 3V, 10≤IOUT≤800mA LM1117I-3.3 VIN = 4.75V, 0≤IOUT≤800mA LM1117I-5.0 VIN = 6.5V, 0≤IOUT≤800mA IOUT = 100mA IOUT = 500mA IOUT = 800mA VIN-VOUT = 5V, TJ = 25℃ LM1117I-ADJ, VIN = 15V LM1117I-3.3, VIN≤15V LM1117I-5.0, VIN≤15V TA = 25℃, 30ms 脉冲
LM1117-5.0 VIN = 6.5V, 0≤IOUT≤800mA IOUT = 100mA
IOUT = 500mA
ILIMIT
电流限制 最小负载电流 空载电流
热调节 调节管脚电流
IOUT = 800mA VIN-VOUT = 5V, TJ = 25℃
AMS1117电压转换芯片说明书
N/C V OUT V OUTN/CAdvanced AMS1117Monolithic 1A LOW DROPOUT VOLTAGE REGULATORSystemsRoHs Compli antFEATURESAPPLICATIONS• Three Terminal Adjustable or Fixed Voltages* • High Efficiency Linear Regulators 1.5V, 1.8V, 2.5V, 2.85V, 3.3V and 5.0V • Post Regulators for Switching Supplies • Output Current of 1A• 5V to 3.3V Linear Regulator • Operates Down to 1V Dropout • Battery Chargers• Line Regulation: 0.2% Max. • Active SCSI Terminators• Load Regulation: 0.4% Max.• Power Management for Notebook • SOT-223, TO-252 and SO-8 package available• Battery Powered InstrumentationGENERAL DESCRIPTIONThe AMS1117 series of adjustable and fixed voltage regulators are designed to provide up to1A output current 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 AMS1117 devices are pin compatible with other three-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.ORDERING INFORMATION:PIN CONNECTIONSSOT-223 Top View8L SOIC Top ViewV OUT V OUT V IN3 PIN FIXED/ADJUSTABLEVERSION1- Ground/Adjust123TAB ISTO-252 FRONT VIEW313- V INABSOLUTE MAXIMUM RATINGS (Note 1)Power Dissipation Internally limited Soldering informationInput Voltage 15V Lead Temperature (25 sec) 265°C Operating Junction Temperature Thermal ResistanceControl Section Power Transistor Storage temperature-40°C to 125°C-40°C to 125°C- 65°C to +150°CSO-8 packageTO-252 packageSOT-223 package* With package so l d e r i ngϕJA= 160°C/WϕJA= 80°C/WϕJA= 90°C/W*to copper area over backsideground plane or internal power plane ϕJA can vary from46°C/W to >90°C/W depending on mounting technique andthe size of the copper area.ELECTRICAL CHARACTERISTICSELECTRICAL CHARACTERISTICSParameters identified with boldface type apply over the full operating temperature range.Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed.Note 2: Line and Load regulation are guaranteed up to the maximum power dissipation of 1.2 W for SOT-223, 2.2W for TO-252 and 780mW for 8-Lead SOIC. Power dissipation is determined by the input/output differential and the output current. Guaranteed maximum power dissipation will not be available over the full input/output range.Note 3: See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are measured at a constant junction temperature by low duty cycle pulse testing. Load regulation is measured at the output lead ~1/8” from the package.Note 4: Dropout voltage is specified up to 0.8A load. For currents over 0.8A dropout will be higherNote 5: Minimum load current is defined as the minimum output current required to maintain regulation. When 1.5V ≤(V IN - V OUT) ≤12V the device is guaranteed to regulate if the output current is greater than 10mA.APPLICATION HINTSThe AMS1117 series of adjustable and fixed regulators are easy to use and are protected against short circuit and thermal overloads. Thermal protection circuitry will shut-down the regulator should the junction temperature exceed 165°C at the sense point.Pin compatible with older three terminal adjustable regulators, these devices offer the advantage of a lower dropout voltage, more precise reference tolerance and improved reference stability with temperature.V IND1V OUTStabilityThe circuit design used in the AMS1117 series requires the use ofan output capacitor as part of the device frequency compensation. The addition of 22µF solid tantalum on the output will ensure stability for all operating conditions.When the adjustment terminal is bypassed with a capacitor to improve the ripple rejection, the requirement for an output capacitor increases. The value of 22µF tantalum covers all cases of bypassing the adjustment terminal. Without bypassing theOutput VoltageĤigure 1.Fadjustment terminal smaller capacitors can be used with equally good results.To further improve stability and transient response of these devices larger values of output capacitor can be used.Protection DiodesThe AMS1117 series develops a 1.25V reference voltage between the output and the adjust terminal. Placing a resistor between these two terminals causes a constant current to flow through R1 and down through R2 to set the overall output voltage. This current is normally the specified minimum load current of 10mA. Because I ADJ is very small and constant it represents a small error and it can usually be ignored.Unlike older regulators, the AMS1117 family does not need any protection diodes between the adjustment pin and the output and from the output to the input to prevent over-stressing the die. Internal resistors are limiting the internal current paths on the AMS1117 adjustment pin, therefore even with capacitors on the adjustment pin no protection diode is needed to ensure device safety under short-circuit conditions.Diodes between the input and output are not usually needed.VV OUT Microsecond surge currents of 50A to 100A can be handled by the internal diode between the input and output pins of the device. In normal operations it is difficult to get those values of surge currents even with the use of large output capacitances. If high value output capacitors are used, such as 1000µF to 5000µF and the input pin is instantaneously shorted to ground, damage can occur. A diode from output to input is recommended, when a crowbar circuit at the input of the AMS1117 is used (Figure 1).V OUT = V REF ADJ R2Figure 2. Basic Adjustable R e gu l ato rLoad RegulationTrue remote load sensing it is not possible to provide, because the AMS1117 is a three terminal device. The resistance of the wire connecting the regulator to the load will limit the load regulation. The data sheet specification for load regulation is measured at the bottom of the package. Negative side sensing is a true Kelvin connection, with the bottom of the output divider returned to the negative side of the load.The best load regulation is obtained when the top of the resistor divider R1 is connected directly to the case not to the load. If R1 were connected to the load, the effective resistance between the regulator and the load would be:R P x ( R2+R1 ) ,R P = Parasitic Line ResistanceR1APPLICATION HINTSConnected as shown , R P is not multiplied by the divider ratioR PPARASITIC The total thermal resistance from junction to ambient can be as low as 45°C /W. This requires a reasonable sized PC board with at least on layer of copper to spread the heat across the board and couple it into the surrounding air.V R LExperiments have shown that the heat spreading copper layer does not need to be electrically connected to the tab of the device. The PC material can be very effective at transmitting heat between the pad area, attached to the pad of the device, and a ground plane layer either inside or on the opposite side of the board. Although the actual thermal resistance of the PC material is high, the Length/Area ratio of the thermal resistance between layers is small. The data in Table 1, was taken using 1/16” FR-4 board with 1 oz. copper foil, and it can be used as a rough guideline for estimating thermal resistance.For each application the thermal resistance will be affected by thermal interactions with other components on the board. To determine the actual value some experimentation will be necessary.The power dissipation of the AMS1117 is equal to: *CONNECT R1 TO CASECONNECT R2 TO LOADFigure 3. Connections for Best Load RegulationIn the case of fixed voltage devices the top of R1 is connected Kelvin internally, and the ground pin can be used for negative side sensing.Thermal ConsiderationsThe AMS1117 series have internal power and thermal limiting circuitry designed to protect the device under overload conditions. However maximum junction temperature ratings of 125°C should not be exceeded under continuous normal load conditions.Careful consideration must be given to all sources of thermal resistance from junction to ambient. For the surface mount package SOT-223 additional heat sources mounted near the device must be considered. The heat dissipation capability of the PC board and its copper traces is used as a heat sink for the device. The thermal resistance from the junction to the tab for the AMS1117 is 15°C/W. Thermal resistance from tab to ambient can be as low as 30°C /W.P D = ( V IN - V OUT )( I OUT )Maximum junction temperature will be equal to:T J = T A(MAX) + P D (Thermal Resistance (junction-to-ambient)) Maximum junction temperature must not exceed 125°C.Ripple RejectionThe ripple rejection values are measured with the adjustment pinbypassed. The impedance of the adjust pin capacitor at the ripple frequency should be less than the value of R1 (normally 100Ω to 200Ω) for a proper bypassing and ripple rejection approaching the values shown. The size of the required adjust pin capacitor is a function of the input ripple frequency. If R1=100Ω at 120Hz the adjust pin capacitor should be >13µF. At 10kHz only 0.16µF is needed.The ripple rejection will be a function of output voltage, in circuits without an adjust pin bypass capacitor. The output ripple will increase directly as a ratio of the output voltage to the reference voltage (V OUT / V REF ).O U T P U T V O L T A G E D E V I A T I O N (%)O U T P U T V O L T A G E C H A N G E (%)M I N I M U M O P E R A T I N G C U R R E N T (m A )A D J U S T P I N C U R R E N T (µA )R I P P L E R E J E C T I O N (d B )S H O R T C I R C U I T C U R R E N T (A )10TYPICAL PERFORMANCE CHARACTERISTICSMinimum Operating Current (Adjustable Device)Short-Circuit Current121.2591.0060.750.5030.250 05101520INPUT/OUTPUT DIFFERENTIAL (V) 00 5 10 15INPUT/OUTPUT DIFFERENTIAL0.10Load RegulationRipple Rejection vs. Current1000.05-0.05908070605040 -0.1030-0.1520-0.20-50-25255075100125TEMPERATURE (°C)0.25 0.5 0.75 1.0OUTPUT CURRENT (A)2.0 Temperature Stability100 Adjust Pin Current9080 1.0706050 4030 -1.02010-2.0-50 -25255075100 125 150TEMPERATURE (°C)-50 -25255075100 125 150TEMPERATURE (°C)PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted.TO-252 PLASTIC PACKAGE (D)3 LEAD SOT-223 PLASTIC PACKAGEAMS1117PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted (Continued).8 LEAD SOIC PLASTIC PACKAGE (S)*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE。
最新AMS1117全系列(解析)
最新AMS1117全系列解析AMS1117全系列是一款高性能的线性稳压器，广泛应用于各类电子设备中。
本文将为您详细解析AMS1117全系列的特点、应用及注意事项，帮助您更好地了解这款稳压器。
一、AMS1117全系列概述1. 输出电流：最大可达1A，满足大部分电子设备的需求。
2. 线性稳压：采用线性稳压技术，具有低噪声、高稳定性等优点。
3. 固定/可调输出：根据不同型号，提供固定电压或可调电压输出。
4. 宽电压输入范围：输入电压范围为4.5V至12V，适应多种电源环境。
5. 封装形式：采用SOT223、SOT89等封装，便于安装和使用。
二、AMS1117全系列应用场景1. AMS11173.3：适用于3.3V供电的嵌入式系统、通信设备、数码产品等。
2. AMS11175.0：适用于5V供电的电子产品，如单片机、传感器、各类模块等。
3. AMS1117adj：可根据实际需求调整输出电压，适用于电源模块、充电器等场合。
三、AMS1117全系列注意事项1. 安装时，注意散热：由于AMS1117全系列采用线性稳压技术，发热量较大，建议在安装时留出足够的散热空间，或使用散热器。
3. 调整电阻选择：对于AMS1117adj型号，需外接两个电阻来调整输出电压。
根据所需输出电压和公式计算合适的电阻值，以确保稳压器正常工作。
四、AMS1117全系列优势分析1. 高效率与稳定性：AMS1117全系列稳压器在提供稳定输出电压的同时，保持了较高的效率，减少了能量损耗，提升了系统的整体性能。
2. 优异的负载调整率：即使在负载变化较大的情况下，AMS1117全系列也能保持输出电压的稳定，这对于负载波动较大的应用场合尤为重要。
3. 过温保护：内置过温保护功能，当温度超过安全范围时，稳压器会自动关闭输出，保护电路不受损害。
4. 输出电流限制：AMS1117全系列具有内置的输出电流限制功能，防止过载情况下的永久性损坏。
五、AMS1117全系列在实际应用中的案例1. 移动电源：使用AMS11175.0稳压器，为移动电源提供稳定的5V输出，确保充电设备的兼容性和安全性。
AMS1117-ADJ 中文资料
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
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
封装 SOT-223
打印名称
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 AMS1117-2.85 AMS1117-3.0 AMS1117-3.3 AMS1117-5.0
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
ams1117标准电路
ams1117标准电路
AMS1117是一款线性稳压器件，常用于电源电路中对低压电信号进行稳压处理的应用。
其标准电路如下：
1. 输入滤波电容（Cin）：用于吸收输入端电源线上的高频噪声，提供电源的稳定性。
常使用10uF电解电容。
2. AMS1117芯片：稳压器件，具有内部过载保护和短路保护功能。
3. 输出滤波电容（Cout）：用于稳定输出电压，并且提供一定的电流响应能力。
常使用22uF电解电容。
4. 输出电压选择电阻（R1和R2）：通过选择合适的电阻比例来设置输出电压。
具体电阻值的选择可以参考AMS1117的数据手册。
5. 输出引脚（Vout）：稳定的输出电压。
6. 输入引脚（Vin）：输入电压。
7. 接地引脚（GND）：接地。
需要注意的是，此标准电路是一种典型的应用电路，具体使用时要根据实际需求进行调整，例如电容的选择和布局、散热措
施等。
同时，还应注意AMS1117的最大输入电压和最大输出电流等参数，以确保电路设计的可靠性和稳定性。
1117 datasheet
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 OutputVoltage 10mA<=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!。
ams1117
万联芯城万联芯城电子元器件物料全国供应，专业提供电子元器件原装现货产品，1片起订，价格优势明显，电子元器件采购网万联芯城目前为长电科技，顺络电子，先科ST等多家知名原厂的指定授权代理商，专为客户提供电子元器件配单业务，提交物料清单即可当天报价当天发货，点击进入万联芯城。
1A可调/固定低压差线性稳压器 - 低压差电压 - 负载调节：典型值为0.2％ - 针对低电压优化 - 片上热限制 - 标准SOT-223和TO-252封装 - 三端可调或固定低压差 1.2V，1.5V，1.8V，2.5V，2.85V，3.3V，5V.监管机构 - 活动SCSI终结器 - 高效线性稳压器 - 用于开关电源的稳压器 - 电池充电器 - 12V至5V线性稳压器 - 主板时钟耗材 AMS1117-ADJ和AMS1117-1.2，-1.5，-1.8，-2.5，-2.85， -3.3和-5是低压差三端稳压器 1A输出电流能力.这些设备已经针对低电压进行优化，其中瞬态响应和最小输入电压至关重要. 2.85V版本是专门设计用于活动终结者 SCSI总线.片上热限制可防止任何过载和环境温度的组合会产生过高的结温.与PNP型稳压器不同，输出功率高达10％电流浪费为静态电流，静态电流， AMS1117的租金流入负荷， ciency. AMS1117系列调节器可用于工业，试用标准SOT-223和TO-252电源封装.主要特征应用一般说明典型应用注意：Vout引脚和电容之间的距离不应超过4cm，以获得出色的性能图1.典型应用 AMS1117 AMS1117高级单片系统1A可调/固定低压差线性稳压器引脚分配 *封装焊接到背面接地层或内部电源平面上的0.5平方英寸铜面积，ΘJA 可以从30°C / W变化到超过50°C / W.其他安装技术可提供比30°C / W更好的热阻.绝对最大额定值图2. Pin分配 AMS1117参数闵.最大.单元 V在 18 V （ V在 - V OUT ） * 一世 OUT见图3工作结温范围 -20 125 C 存储温度范围 -65 150 C引线温度（焊接10秒） 300 C AMS1117高级单片系统1A可调/固定低压差线性稳压器 在正常型中 出现的典型 和极限适用于T J = 25℃.以Boldface类型出现的限制适用于整个结温操作，-20℃至125℃.电气特性框图热限制当前限制 V OUT V IN基质 GND（固定输出） ADJ. （可调输出）图3.框图 AMS1117符号参数条件敏 （笔记2）典型 （注1）马克斯 （笔记2）单位 V REF参考电压 AMS1117 1A可调/固定低压差线性稳压器 在正常型中 出现的典型 和极限适用于T J = 25℃.以Boldface类型出现的限制适用于整个结温操作，-20℃至125℃.电气特性 （继续）符号参数条件敏 （笔记2）典型 （注1）马克斯 （笔记2）单位 △ V OUT线路遗产 （注3） I OUT = 10mA，（V OUT + 1.5V）<= V IN <= 12V 0.035 0.2 ％负载回归 （注3） V IN -V OUT = 2V，10mA <= I OUT <=1A， 0.2 0.7 ％ AMS1117-1.2 V IN -V OUT = 2V，10mA <= I OUT <= 1A， 0.2 1 ％ V IN -V OUT辍学电压 I OUT = 1A，△V REF = 1％ 1.100 1.250 V 我 限制电流限制 V IN -V OUT = 2V，T ? = 25℃ 1.1 1.5一个最小负载 电流 （ 注4） AMS1117-ADJ 1.5V <=（V IN -V OUT ）<= 10V 10嘛静止蛋黄 V IN = V OUT + 1.25V五 13嘛热规 T A = 25°C，30ms脉冲 0.01 0.1 ％/ w ^波纹拒绝 f = 120Hz，V IN -V OUT = 3V，V 纹波 = 1V PP 60 72分贝调整引脚电流 50 120 μA调整引脚电流更改 1.5V <= V IN -V OUT <= 7V，10mA <= I OUT <= 1A 0.2五 μA温度稳定性 0.5 ％长期稳定性 ?一个 = 125℃，1000小时。
AMS1117 DATASHEET中文资料
AMS1117-3.0 AMS1117-3.0 AMS1117-3.3 AMS1117-3.3
AMS1117-5.0 AMS1117-5.0
AMS1117-ADJ AMS1117-2.85
AMS1117-1.2 AMS1117-3.0 AMS1117-1.5 AMS1117-3.3
AMS1117-1.8 AMS1117-5.0 AMS1117-2.5
共10页 第3页
AMS1117
（接上页）
参数
输出电压
输出电压温度稳定性 线性调整 负载调整 漏失电压 静态电流 纹波抑制比 可调管脚电流 可调管脚电流变化 温度稳定性 长期稳定性 RMS输出噪声
热阻系数 (无散热片)
符号
测试条件
最小值 典型值 最大值 单位
AMS1117-2.85,
IOUT=10mA, VIN=4.85V,TJ=25°C , 2.820 2.850 .880
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
线性瞬态响应（VOUT=2.85V）
线性瞬态响应（VOUT=5 V）
ADVANCED MONOLITHIC SYSTEMS (translate by BONA 0755-82800289)
IOUT=10mA, VIN=3.8V, TJ=25°C , 1.782 1.800 1.818 V
AMS1117-3.3英文规格书
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)Symbol ParameterConditionsMin (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-22315 ℃/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 RegulatorAdvanced Monolithic Systems The " " logo is a registered trademark of Advanced Monolithic Systems.All other company and product names are trademarks of their respective ownersOrdering InformationPackageTemperature 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!。
(中文资料)-AMS1117
AMS1117-3.0 AMS1117-3.0 AMS1117-3.3 AMS1117-3.3
AMS1117-5.0 AMS1117-5.0
AMS1117-ADJ AMS1117-2.85
AMS1117-1.2 AMS1117-3.0 AMS1117-1.5 AMS1117-3.3
AMS1117-1.8 AMS1117-5.0 AMS1117-2.5
AMS1117内部集成过热保护和限流电路，是电池供电 和便携式计算机的最佳选择。
SOT-223
SOT-89-3
TO-220-3L
特点
TO-263-3L
TO-252-2L
* 固定输出电压为 1.5V、1.8V、2.5V、2.85V、3.0V、 3.3V、5.0V 和可调版本，具有 1％的精度
* 固定输出电压为 1.2V 的 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
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。
共10页 第6页
典型电气特性曲线
温度稳定性
输出电压变化(%)
2.0 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 -2.0
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
0≤ IOUT≤1A, 6.5V≤VIN≤12V
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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 OutputVoltage 10mA<=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!。