N2576中文资料

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XL2576中文datasheet

3A 52KHz 40V Buck DC to DC Converter XL2576特点：⏹宽输入电压范围3.6-40V⏹有3.3V，5V和可调版本⏹输出可调范围1.23V-38V⏹最大占空比100%⏹最小饱和压降1.3V⏹3A输出电流能力⏹内部优化功率管设计⏹效益高达90%⏹输出线性好且负载可调⏹TTL关断能力⏹内置频率补偿，软启动功能，热关断功能，限流功能短路保护功能⏹可选封装形式：TO-220，TO-263应用领域：⏹LCD监控器，LCD电视⏹数码像框⏹机顶盒⏹调制解调器⏹通信/网络设备概述XL2576是一个52KHz固定频率脉宽调制（降压型）DC/DC转换器。

高效率且高达3A负载驱动能力，低纹波，极好的线性和负载调节能力，仅需最少外部元。

可调输出使用简单，内建频率补偿和固定频率震荡器。

脉宽调制控制电路可以线性调节占空比从0到100%。

具有使能功能，内置过流和短路保护功能，当发生过流和短路保护时，XL2576工作频率从52KHz降到31KHz。

内置频率补偿模块使XL2576外部元件最少。

图1. XL2576封装类型3A 52KHz 40V Buck DC to DC Converter XL2576引脚设置图2. XL2576引脚结构（顶视图）表格1引脚描述引脚数引脚名描述1 输入电压输入引脚，XL2576工作在直流电压3.6V到40V,外接适合大的旁路电容到地来消除输入噪声。

2 输出功率开关输出引脚（SW）.输出端是提供功率输出的开关结点。

3 GND 接地引脚，做版图时必须小心。

此引脚必须放置在硝特基二极管和输出电容到地的外面，来阻止电感电压噪声引起的开关电流毛刺输入到XL2576。

4 反馈反馈引脚（FB），通过外部电阻来分割回路，反馈是来检测和调节输出电压，反馈端电压是1.23V。

5 ON/OFF 使能引脚。

驱动ON/OFF 引脚为低电平则开启设备，驱动此引脚为高电平则关断设备，悬空默认为低电平。

XL2576 中文规格书

3A 52KHz 40V Buck DC to DC Converter XL2576FeaturesWide 4.5V to 40V Input Voltage Range 5V,12V and adjustable versionsOutput Adjustable from 1.23V to 37VMaximum Duty Cycle 100% Minimum Drop Out 1.5VFixed 52KHz Switching Frequency 3A Constant Output Current Capability Internal Optimize Power Transistor High e fficiencyExcellent line and load regulation TTL shutdown capabilityON/OFF pin with hysteresis function Built in thermal shutdown function Built in current limit functionAvailable in TO-220,TO-263 packagesApplicationsLCD Monitor and LCD TV Digital Photo Frame Set-up Box ADSL ModemTelecom / Networking EquipmentGeneral DescriptionThe XL2576 is a 52 KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 3A load with high efficiency, low ripple and excellent line and load regulation. Requiring a minimum number of external components, the regulator is simple to use and include internal frequency compensation and a fixed-frequency oscillator.The PWM control circuit is able to adjust the duty ratio linearly from 0 to 100%. An enable function, an over current protection function is built inside. An internal compensation block is built in to minimize external component count.Figure1. Package Type of XL25763A 52KHz 40V Buck DC to DC Converter XL25763A 52KHz 40V Buck DC to DC Converter XL2576Figure4. XL2576 Typical Application Circuit 12V-5V/3A3A 52KHz 40V Buck DC to DC Converter XL25763A 52KHz 40V Buck DC to DC Converter XL25763A 52KHz 40V Buck DC to DC Converter XL25763A 52KHz 40V Buck DC to DC Converter XL25763A 52KHz 40V Buck DC to DC Converter XL2576LOCATE THE PROGRAMMING RESISTORS NEAR3A 52KHz 40V Buck DC to DC Converter XL25763A 52KHz 40V Buck DC to DC Converter XL25763A 52KHz 40V Buck DC to DC Converter XL2576Figure6. XL2576-5.0 System Parameters Test CircuitTypical System Application for 12V VersionFigure7. XL2576-12 System Parameters Test Circuit3A 52KHz 40V Buck DC to DC Converter XL25763A 52KHz 40V Buck DC to DC Converter XL2576Package Information(1) TO220-5L3A 52KHz 40V Buck DC to DC Converter XL2576Package Information(2) TO263-5L。

XL2576技术资料

Circuit Type
Packing
Blank: Tube
TR: Type and Reel
Package
Version
S: TO263-5L T: TO220-5L
司 ADJ: Adjust
3.3: 3.3V
公 5.0: 5V
12: 12V
限
Package TO220-5L
Temperature Range
n 3.3V,5V,12V and adjustable versions
PWM buck (step-down) DC/DC converter,
n Output Adjustable from 1.23V to 37V
capable of driving a 3A load with high
n Maximum Duty Cycle 100% n Minimum Drop Out 1.5V
Datasheet
3A 52KHz 40V Buck DC to DC Converter
XL2576
Absolute Maximum Ratings（Note1）
Parameter
Symbol
Value
Unit
Input Voltage
Vin
-0.3 to 45
V
Feedback Pin Voltage
Rev 2.2
2
【特别声明：此资料为芯龙原厂提供】
指定代理商：深圳市业辉煌电子有限公司
Datasheet
3A 52KHz 40V Buck DC to DC Converter
XL2576
Function Block
司

SE2576L_DS1

ApplicationsIEEE802.11b DSSS WLAN IEEE802.11g,n OFDM WLANAccess PointsFeaturesDual Mode IEEE802.11b, IEEE802.11g, IEEE802.11n26 dBm, EVM = 3%, 802.11g, OFDM 54 Mbps 29 dBm, 802.11b mask compliantIntegrated PA, Input Match, 2.8V reference voltage generatorIntegrated Temperature Compensated, Positive Slope Power DetectorPb-free, RoHS compliant and Halogen-free 3 mm x 3 mm x 0.9 mm, MSL 3Ordering InformationPart No. Package Remark SE2576L 16 pin QFN Samples SE2576L-R 16 pin QFNTape & Reel SE2576L-EK1 N/AEvaluation kitProduct DescriptionThe SE2576L is a high power 802.11bgn WLAN power amplifier module providing the functionality of the power amplifier, power detector, reference voltage generator and input match.The SE2576L is designed for ease of use and maximum flexibility, with an integrated input match, and external output match to adjust the load line for 5V, 26dBm operation.The SE2576L includes a temperature compensated transmitpower detector with over 20 dB of dynamic range and <1.2dB variation under 3:1 mismatch at the antenna.The SE2576L includes a digital enable control due to an integrated reference voltage generator. The power ramp rise/fall time is 0.5 ȝs typical.Functional Block DiagramFigure 1: Functional Block DiagramFigure 2: SE2576L Pin Out (Top View Through Package) Pin Out DescriptionPin No. Name Description1 RF IN RF Input2 EN Power Amplifier Enable3 GND Ground4 VCC0 Power Supply for Bias Circuit5 GND Ground6 GND Ground7 DET Power Detector Output8 NC No Connect. May be left floating or grounded.9 GND Ground10 RF OUT RF Output11 RF OUT RF Output12 GND Ground13 VCC2 Power Supply for 2nd Stage14 NC No Connect. May be left floating or grounded.15 VCC1 Power Supply driver stages16 GND GroundDie paddle GND GroundAbsolute Maximum RatingsThese are stress ratings only. Exposure to stresses beyond these maximum ratings may cause permanent damage to, or affect the reliability of the device. Avoid operating the device outside the recommended operating conditions defined below. This device is ESD sensitive. Handling and assembly of this device should be at ESD protected workstations.Symbol Definition Min.Max.UnitVCC0, 1, 2 Supply Voltage on VCC -0.3 5.5 V V IN DC input on EN -0.3 3.6 VTX RF Input Power. RF Out terminated in 50 - 12.0 dBmT A Operating Temperature Range -40 85 °CT STG Storage Temperature Range -40 150 °CESD HBM JEDEC JESD22-A114all pins- 1000 VRecommended Operating ConditionsSymbol Parameter Min.Typ. Max.Unit T A Ambient temperature -40 25 85 °C VCC Supply voltage, relative to GND = 0 V 4.5 5 5.5 VDC Electrical CharacteristicsConditions: VCC = 5 V, EN = V ENH, T A = 25 q C, as measured on SiGe Semiconductor’s SE2576L-EV1 evaluation board (de-embedded to device), all unused ports terminated with 50 ohms, unless otherwise noted Symbol Parameter Conditions Min.Typ. Max.UnitI CC-G Total Supply Current POUT = 26 dBm, 54 MbpsOFDM signal, 64QAM- 500 - mAI CC-B Total Supply Current P OUT = 29 dBm, 11 MbpsCCK signal, BT = 0.45- 650 - mAI CC_OFF Total Supply Current EN = 0 V, No RF Applied - 10 100 ȝALogic CharacteristicsConditions: VCC = 5 V, EN = V ENH, T A = 25 q C, as measured on SiGe Semiconductor’s SE2576L-EV1 evaluation board (de-embedded to device), all unused ports terminated with 50 ohms, unless otherwise noted. Symbol Parameter Conditions Min.Typ. Max.UnitV ENH Logic High Voltage (Module On) - 1.8 - 3.6 V V ENL Logic Low Voltage (Module Off) - 0 - 0.4 VI ENH Input Current Logic High Voltage - - 300 - ȝAI ENL Input Current Logic Low Voltage V EN = 0.4V - 1 50 ȝAZ EN Enable pin input impedance Passive PullDown10 kAC Electrical Characteristics802.11g/n Transmit CharacteristicsConditions: VCC = 5 V, EN = 3.3 V, T A = 25 q C, as measured on SiGe Semiconductor’s SE2576L-EV1 evaluationboard (de-embedded to device), all unused ports terminated with 50 ohms, unless otherwise noted. Symbol Parameter ConditionMin.Typ. Max.Unit F INFrequency Range-2400 - 2500 MHz54 Mbps OFDM signal, 64 QAM, 3% EVM - 26 - 1 Mbps CCK signal, BT = 0.045, Mask 29802.11n, HT20, all data rates, Mask30 POUT Output Power802.11n, HT40, all data rates, Mask27 dBmP 1dB P1dB- - 32 - dBm S 21 Small Signal Gain -30 33 - dB ǻS 21 Small Signal Gain Variation Gain variation over single 40MHz channelGain Variation over band - - 0.5 1.0 - - dB 2f - -50 -45 dBm/MHz 3f Harmonics P OUT = 29 dBm, 1 Mbps, 802.11b- -50 -45 dBm/MHzt dr , t df Delay and rise/fall Time50 % of V EN edge and 90/10 % of final output power level- 0.5 - ȝs S 11 Input Return Loss -1015-dB STABStabilityCW, P OUT = 29 dBm 0.1 GHz – 20 GHz Load VSWR = 4:1All non-harmonically related outputs less than -42 dBm/MHzRU RuggednessCW 50% duty cycle, PIN = +12dBm, Load VSWR = 6:1No permanent damage.Power Detector CharacteristicsConditions: VCC = 5 V, EN = VENH, T A = 25 q C, as measured on SiGe Semiconductor’s SE2576L-EV1 evaluation board, unless otherwise noted.Symbol Parameter Condition Min.Typ. Max.UnitF OUT Frequency Range - 2400 - 2500 MHzPDR Power detect range,CWMeasured at RF out 5 - 30 dBmPDZ src DC source impedanceon PD_OUT- - 2.3 - KȍPDZ LOAD DC load impedance - - 26.5 - KȍPDV P5Output Voltage, P OUT=5dBm CWMeasured into 26.5Kȍ- 0.33 - VPDV P26Output Voltage, P OUT=26 dBm CWMeasured into 26.5Kȍ- 0.70 - VPDV P30Output Voltage, P OUT=30 dBm CWMeasured into 26.5Kȍ- 1.00 - VLPF-3dB Power detect low passfilter -3dB cornerfrequencyMeasured into 26.5Kȍ- 2.0 - MHzFigure 3: SE2576L Detector CharacteristicsPackage DiagramFigure 4: SE2576L Package Diagram Recommended Land and Solder PatternsFigure 5: SE2576L Recommended Land and Solder PatternPackage Handling InformationBecause of its sensitivity to moisture absorption, instructions on the shipping container label must be followed regarding exposure to moisture after the container seal is broken, otherwise, problems related to moisture absorption may occur when the part is subjected to high temperature during solder assembly. The SE2576L is capable of withstanding a Pb free solder reflow. Care must be taken when attaching this product, whether it is done manually or in a production solder reflow environment. If the part is manually attached, precaution should be taken to insure that the device is not subjected to temperatures above its rated peak temperature for an extended period of time. For details on both attachment techniques, precautions, and handling procedures recommended by SiGe, please refer to: SiGe’s Application Note: “Quad Flat No-Lead Module Solder Reflow & Rework Information”, Document NumberQAD-00045SiGe’s Application Note: “Handling, Packing, Shipping and Use of Moisture Sensitive QFN”, Document NumberQAD-00044Branding InformationFigure 6: SE2576L BrandingTape and Reel InformationParameterValue Devices Per Reel 3000 Reel Diameter 13 inches Tape Width12 millimetersFigure 7: SE2576L-R Tape and Reel InformationCaution! Class 1C ESD sensitive deviceSiGe 2576L Lot CodeDocument Change HistoryRevision Date Notes1.0 Jan 10, 2009 Created1.1 May 8, 2009 Updated PA Control Logic CharacteristicsUpdated POD for SE2576L datasheet.1.2 Jul 8, 2009 Updated to correct pins 8 & 14 definitions.1.3 Aug 2, 2009 Updated detector characteristics1.4 Sep 24, 2009 Updated current consumption1.5 Oct 25, 2009 Updated detector plot1.6 Jan 25, 2010 Updated Off-State Leakage current1.7 Jun 22, 2010 Extended operating temperature to Industrial limits1.8 Dec 18, 2010 Updated ESD ratingAdded OFDM Mask ComplianceThis page intentionally left blankEmail: sales@Customer Service Locations:North America: Hong Kong1050 Morrison Drive, Suite 100 Phone: +852 3428 7222Ottawa ON K2H 8K7 Canada Fax: +852 3579 5450Phone: +1 613 820 9244 San DiegoFax: +1 613 820 4933 Phone: +1 858 668 3541 (ext. 226)Fax: +1 858 668 3546United KingdomPhone: +44 1279 464217Fax: +44 1279 464201Product PreviewThe datasheet contains information from the product concept specification. SiGe Semiconductor, Inc. reserves the right to change information at any time without notification.Preliminary InformationThe datasheet contains information from the design target specification. SiGe Semiconductor, Inc. reserves the right to change information at any time without notification.Production testing may not include testing of all parameters.Information furnished is believed to be accurate and reliable and is provided on an “as is” basis. SiGe Semiconductor, Inc. assumes no responsibility or liability for the direct or indirect consequences of use of such information nor for any infringement of patents or other rights of third parties, which may result from its use. No license or indemnity is granted by implication or otherwise under any patent or other intellectual property rights of SiGe Semiconductor, Inc. or third parties. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SiGe Semiconductor, Inc. products are NOT authorized for use in implantation or life support applications or systems without express written approval from SiGe Semiconductor, Inc.Copyright 2010 SiGe Semiconductor, Inc.All Rights Reserved。

SE2576L-R;SE2576L-EK1;中文规格书,Datasheet资料

The SE2576L is a high power 802.11bgn WLAN power amplifier module providing the functionality of the power amplifier, power detector, reference voltage generator and input match. The SE2576L is designed for ease of use and maximum flexibility, with an integrated input match, and external output match to adjust the load line for 5V, 26dBm operation. The SE2576L includes a temperature compensated transmit power detector with over 20 dB of dynamic range and <1.2dB variation under 3:1 mismatch at the antenna. The SE2576L includes a digital enable control due to an integrated reference voltage generator. The power ramp rise/fall time is 0.5 μs typical.
/
DATA SHEET SE2576L: 2.4 GHz High Power Wireless LAN Power Amplifier
Symbol ZEN Parameter Enable pin input impedance Conditions Passive Pull Down Min. Typ. 10 Max. Unit kΩ

DIN2573,DIN2576

Medidas en milimetrosDimensions in mmMaBein mmNorma de montajeForma A : cara de junta sin exigencias Forma B: cara de junta con Rz=160 Standars of mountingShape A : joint face without requirement. Shape B: joint face with Rz=160. RegelausfuhrungForm A : Dichtflache ohne Anforderung Form B: Dichtflache Rz=160, gedreht.Medidas en milimetros Dimensions in mm Para construccion de buques MaBein mmForma AS: sin exigencias Forma BS: RZ=160.For ships buildingShape AS: without requirement. Shape BS:Rz=160.Ausfuhrung fur den SchiffbauForm AS: Dichtflache ohne Anforderung. Form BS: Dichtflache R - 160, gedreht.Restantes medidas e indicaciones como en las formas A y B.Residual dimensions like shapes A and B.Ubrige MaBe und Angabeb wie Form A und B.Bridas planas para soldar Presion nominal 6 Flat flange for welding Rated pressure 6Flansche, glatt zum Löten oder ScheweiBen Nenndruck 6DIN 2573Bridas planas para soldar Presion nominal 6 Flat flange for welding Rated pressure 6Flansche, glatt zum Löten oder ScheweiBen Nenndruck 6ISO Serie 1 DIN Serie 2Reihe 1Reihe 2— 1414,517,2— 17,7— 202121,3— 22— 252626,9— 27,6— 303133,7— 34,4— 383942,4— 43,1— 44,545,548,3— 49— 5758,160,3— 61,16576,1— 77,11601661304M 12 141,898088,9— 90,31901871504M 16 182,98— 108109,6114,3— 115,9— 133134,8139,7— 141,6— 159161,1168,3— 170,5200219,1— 221,83202272808M 16 187,15— 267270,2273— 276,2300323,9— 327,644024739512M20 2212,6355,6— 359,7— 368372,2406.4 — 411— 419423,7(450) *457— 462,559530755016M20 2221,4500508—513,664530760020M 202224,6DIN 257318,4Diámetro Nominal Rated Diameter NennweitePeso de una brida / Weight of a flange /Gewicht eines Flansches (7,85Kg/dm3)Numero / Number / Anzahl Rosca / Thread/ Gewinde49516M20 224005402879,6144512M20 2215,633535049026712M 16 182503752474,61502652072258M 16 185,222008M 16 181252402071,531002101871704M 16 183,461104M 12 14501401661,19401301651004M 12 141,39904M 12 14321201650,625100145754M 10 110,74654M 10 1120901450,3631580125554M 10 110,41504M 10 111075125Tornillos / Screws / Schraubend1d5Dbckd2Tuba / Pipe / Rohr - AnschluBmabeBrida / Flange /FlanschBridas planas para soldarPresion nominal 10Flat flange for weldingRated pressure 10Flansche, glatt zum Löten oder ScheweiBen Nenndruck 10Medidas en milimetrosDimensions in mmMaBein mmNorma de montajeForma A : cara de junta sin exigenciasForma B: cara de junta con Rz=160Standards of mountingShape A : joint face without requirement.Shape B: joint face with Rz=160.RegelausfuhrungForm A : Dichtflache ohne AnforderungForm B: Dichtflache Rz=160, gedreht.Medidas en milimetrosDimensions in mmPara construccion de buques MaBein mmForma AS: sin exigenciasForma BS: RZ=160.For ship buildingShape AS: without requirement.Shape BS:Rz=160.Ausfuhrung fur den SchiffbauForm AS: Dichtflache ohne Anforderung.Form BS: Dichtflache R - 160, gedreht.Restantes medidas e indicaciones como en las formas A y B.Residual dimensions like shapes A and B.Ubrige MaBe und Angabeb wie Form A und B.DIN 2576Bridas planas para soldar Presion nominal 10Flat flange for welding Rated pressure 610Flansche, glatt zum Löten oder ScheweiBen Nenndruck 10ISO Serie 1DIN Serie 2Reihe 1Reihe 2—1414,50,61317,2— 17,70,605— 20210,67521,3— 220,669— 25260,74926,9— 27,60,936— 30311,1433,7— 34,41,11— 38391,6642,4— 43,11,62— 44,545,51,8948,3— 491,86— 5758,12,5160,3— 61,12,476576,1— 77,11851861454M 16 1838088,9— 90,32002071608M 16183,79— 108109,64,2114,3— 115,94,03— 133134,85,71139,7— 141,65,46— 159161,16,72168,3— 170,56,57( 175 )193,7— 196,131********M20 228,45200219,1— 221,83402472958M20229,31— 267270,212,5273— 276,211,9300323,9— 327,644526740012M 202213,8355,6— 359,720,6— 368372,219406.4 — 41127,9— 419423,725,9450457— 462,561538756520M24 2635,6500508—513,667038762020M 242641,1DIN 257651516M24 2640056532746016M 202235050528735012M20 222503952672408M20 221502852272108M 16181252502271808M 16181002202071254M 16 18501651861104M 1618401501651004M 161832140165854M 121425115165754M 121420105165654M 12141595145604M 12141090145kNumero / Number / AnzahlRosca / Thread/ Gewinded2Tubo / Pipe / Rohr - AnschluBmabeBrida / Flange /FlanschTornillos / Screws / SchraubenPeso de una brida / Weight of a flange /Gewicht eines Flansches (7,85Kg/dm3)Diámetro Nominal Rated Diameter Nennweited1d5D b c。

2576应用参数

基于LM2576的高可靠MCU电源设计-------------------------------------------------------------------------------------------摘要：在对线性稳压集成电路与开关稳压集成电路的应用特性进行比较的基础上，简单介绍了LM2576的特性，给出了基本开关稳压电源、工作模式可控的开关稳压电源和开关与线性结合式稳压电路的设计方案及元器件参数的计算方法。

关键词：LM2576电源设计MCU嵌入式控制系统的MCU一般都需要一个稳定的工作电压才能可靠工作。

而设计者多习惯采用线性稳压器件（如78xx系列三端稳压器件）作为电压调节和稳压器件来将较高的直流电压转变MCU所需的工作电压。

这种线性稳压电源的线性调整工作方式在工作中会大的“热损失”（其值为V压降×I负荷），其工作效率仅为30%～50%。

加之工作在高粉尘等恶劣环境下往往将嵌入式工业控制系统置于密闭容器内的聚集也加剧了MCU的恶劣工况，从而使嵌入式控制系统的稳定性能变得更差。

而开关电源调节器件则以完全导通或关断的方式工作。

因此，工作时要么是大电流流过低导通电压的开关管、要么是完全截止无电流流过。

因此，开关稳压电源的功耗极低，其平均工作效率可达70%～90%。

在相同电压降的条件下，开关电源调节器件与线性稳压器件相比具有少得多的“热损失”。

因此，开关稳压电源可大大减少散热片体积和PCB板的面积，甚至在大多数情况下不需要加装散热片，从而减少了对MCU工作环境的有害影响。

采用开关稳压电源来替代线性稳压电源作为MCU电源的另一个优势是：开关管的高频通断特性以及串联滤波电感的使用对来自于电源的高频干扰具有较强的抑制作用。

此外，由于开关稳压电源“热损失”的减少，设计时还可提高稳压电源的输入电压，这有助于提高交流电压抗跌落干扰的能力。

LM2576系列开关稳压集成电路是线性三端稳压器件（如78xx系列端稳压集成电路）的替代品，它具有可靠的工作性能、较高的工作效率和较强的输出电流驱动能力，从而为MCU的稳定、可靠工作提供了强有力的保证。

BM2576中文资料

Note 1: External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. Refer to Application Information for details.Note 2: The oscillator frequency reduces to approximately 11KHz in the event of fault conditions, such as output short or overload. And the regulated output voltage will drop approximately 40% from the nominal output voltage. This self-protection feature lowers the average power dissipation by lowering the minimum duty cycle from 5% down to approximately 2%.Note 3: For these parameters, FB is removed from V OUT and connected to +12V to force the output transistor OFF.Note 4: V OUT pin sourcing current. No diode, inductor or capacitor connect to V OUT.Note 5: FB is removed from V OUT and connected to 0V.BLOCK DIAGRAMBM2576 BM2576TYPICAL CHARACTERISTICSAPPLICATION INFORMATIONIt is required that VIN must be bypassed with at least a 100uF electrolytic capacitor for stability. Also, it is strongly recommended the capacitor’s leads must be dept short, and located near the regulator as possible.For low operating temperature range, for example, below -25℃, the input capacitor value may need to be larger. This is due to the reason that the capacitance value of electrolytic capacitors decreases and the ESR increases with lower temperatures and age. Paralleling a ceramic or solid tantalum capacitor will increase the regulator stability at cold temperatures.Output Capacitors (C OUT)An output capacitor is also required to filter the output voltage and is needed for loop stability. The capacitor should be located near the BM2576 using short PC board traces. Low ESR types capacitors are recommended for low output ripple voltage and good stability. Generally, low value or low voltage (less than 12V) electrolytic capacitors usually have higher ESR numbers. For example, the lower capacitor values (220uF – 1000uF) will yield typically 50mV to 150mV of output ripple voltage, whilelarger-value capacitors will reduce the ripple to approximately 20mV to 50mV.The amount of output ripple voltage is primarily a function of the ESR (Equivalent Series Resistance) of the output capacitor and the amplitude of the inductor ripple current (△I IND).Output Ripple Voltage = (△I IND) x (ESR of C OUT)Some capacitors called “high-frequency”, “low-inductance”, or “low-ESR” are recommended to use to further reduce the output ripple voltage to 10mV or 20mV. However, very low ESR capacitors, such as Tantalum capacitors, should be carefully evaluated.Catch DiodeThis diode is required to provide a return path for the inductor current when the switch is off. It should be located close to theBM2576 using short leads and short printed circuit traces as possible.To satisfy the need of fast switching speed and low forward voltage drop, Schottky diodes are widely used to provide the best efficiency, especially in low output voltage switching regulators (less than 5V). Besides, fast-Recovery, high-efficiency, orultra-fast recovery diodes are also suitable. But some types with an abrupt turn-off characteristic may cause instability and EMI problems. A fast-recovery diode with soft recovery characteristics is better choice.Output Voltage Ripple and TransientsThe output ripple voltage is due mainly to the inductor sawtooth ripple current multiplied by the ESR of the output capacitor. The output ripple voltage of a switching power supply will contain a sawtooth ripple voltages at the switcher frequency, typically about 1% of the output voltages, and may also contain short voltage spikes of the sawtooth waveform.Due to the fast switching action, and the parasitic inductance of the output filter capacitor, there is voltage spikes presenting at the peaks of the sawtooth waveform. Cautions must be taken for stray capacitance, wiring inductance, and even the scope probes used for transients evaluation. To minimize these voltage spikes, shortening the lead length and PCB traces is always the first thought. Further more, an additional small LC filter (30uH & 100uF) (as shown in Figure 3) will possibly provide a 10X reduction in output ripple voltage and transients.Inductor SelectionThe BM2576 can be used for either continuous or discontinuous modes of operation. Each mode has distinctively different operating characteristics, which can affect the regulator performance and requirements.With relatively heavy load currents, the circuit operates in the continuous mode (inductor current always flowing), but under light load conditions, the circuit will be forced to the discontinuous mode (inductor current falls to zero for a period of time). For light loads (less than approximately 300mA) it may be desirable to operate the regulator in the discontinuous mode, primarily because of the lower inductor values required for the discontinuous mode.Inductors are available in different styles such as pot core, toriod, E-frame, bobbin core, et., as well as different core materials, such as ferrites and powdered iron. The least expensive, the bobbin core type, consists of wire wrapped on a ferrite rod core. This type of construction makes for an inexpensive inductor, but since the magnetic flux is not completely contained within the core, it generates more electromagnetic interference (EMI). This EMI can cause problems in sensitive circuits, or can give incorrect scope readings because of induced voltages in the scope probe.An inductor should not be operated beyond its maximum rated current because it may saturate. When an inductor begins to saturate, the inductance decreases rapidly and the inductor begins to look mainly resistive (the DC resistance of the winding). This will cause the switch current to rise very rapidly. Different inductor types have different saturation characteristics, and this should be well considered when selecting as inductor.Feedback ConnectionFor fixed output voltage version, the FB (feedback) pin must be connected to V OUT. For the adjustable version, it is important to place the output voltage ratio resistors near BM2576 as possible in order to minimize the noise introduction.ENABLEIt is required that the ENABLE must not be left open. For normal operation, connect this pin to a “LOW” voltage (typically, below 1.6V). On the other hand, for standby mode, connect this pin with a “HIGH” voltage. This pin can be safely pulled up to +V IN without a resistor in series with it.GroundingTo maintain output voltage stability, the power ground connections must be low-impedance. For the 5-lead TO-220 and TO-263 style package, both the tab and pin 3 are ground and either connection may be used.Heatsink and Thermal ConsiderationAlthough the BM2576 requires only a small heatsink for most cases, the following thermal consideration is important for all operation. With the package thermal resistances θJA and θJC, total power dissipation can be estimated as follows:P D = (V IN x I Q) + (V OUT / V IN)(I LOAD x V SAT);When no heatsink is used, the junction temperature rise can be determined by the following:∆T J = P D x θJA;With the ambient temerpature, the actual junction temperature will be:T J = ∆T J + T A;If the actual operating junction temperature is out of the safe operating junction temperature (typically 125℃), then a heatsink is required. When using a heatsink, the junction temperature rise will be reduced by the following:∆T J = P D x (θJC + θinterface + θHeatsink);Also one can see from the above, it is important to choose an heatsink with adequate size and thermal resistance, such that to maintain the regulator’s junction temperature below the maximum operating temperature.元器件交易网BM25763A DC/DC2003/08/07 w w w.b o o k l y.c o m Page11。

XL2576原厂规格书(2014版)

Built in thermal shutdown function Built in current limit function Available in TO-220,TO-263 packages
Applications
n n n n n LCD Monitor and LCD TV Digital Photo Frame Set-up Box ADSL Modem Telecom / Networking Equipment
Rev 2.4 3

3A 52KHz 40V Buck DC to DC Converter Ordering Information XL2576 E1
E1: Lead Fr263-5L T: TO220-5L
XL2576
4 5
Rev 2.4 2

3A 52KHz 40V Buck DC to DC Converter Function Block
XL2576
Figure3. Function Block Diagram of XL2576
Typical Application Circuit
Rev 2.4 5

3A 52KHz 40V Buck DC to DC Converter XL2576-3.3 Electrical Characteristics
Ta = 25℃;unless otherwise specified. Symbol Parameter Test Condition Min. Typ.
XLSEMI Pb-free products, as designated with “ E1” suffix in the par number, are RoHS compliant.

AE2576技术说明书

CCM
AE2576 技术说明书 Ver1.0
降压型开关稳压电源控制器
概述
AE2576 是降压型开关稳压器，具有非常小的电压调整率和电流调整率，具有 3A 的负载驱动能力，AE2576 能够输出 3.3V、5V、12V、15V 的固定电压和电压可调节的可调电压输出方式。
AE2576 应用时比较简单且外围元件较少，内置频率补偿电路和固定频率振荡器。 AE2576 系列产品的开关频率为 52KHz，所以应用时可以使用小尺寸的滤波元件。
应用领域
■ 高效降压型调节器 ■ 正、负电压转换器
1
CCM
典型应用图
AE2576 技术说明书 Ver1.0
功能框图
图 1：固定电压输出模式
3.3v R2=1.7K 15v R2=11.3K
5v R2=3.1K
12v R2=8.4K
For Adjustable R2=0K R1=open
管脚图
5-Lead TO-220(T)
电感 L：
所有的开关调节器都有两种基本的工作方式：即连续型和非连续型，两者之间的区别主要在于流过电感的电流不同，即电感电流若是连续的则称为连续型；若电感电流在一个开关周期内降到零则为非连续型。每一种工作模式都可以影响开关调节器的性能和要求。当负载电流较小时，在设计中可采用非连续模式。AE2576 既适用于连续型也适用于非连续型。通常情况下，连续型工作模式具有好的工作特性且能提供较大的输出功率、较小的峰峰值电流和较小的纹波电压。一般应用时可根据下面公式进行电感的选择：（电压单位：V 电流单位：A）
+150
2
+215
+245
+260 -40～+125

N2576G-5中文资料

FEATURES
Pin compatible with industry products of LM2576 Series Fixed 5V output version Wide output voltage range, 1.23V to 27V for adjustable output version DC-to-DC buck converter requiring only 4 external parts 52 KHz fixed frequency internal oscillator TTL shutdown capability, low power stand -by mode High efficiency Uses readily available standard inductors
TYPICAL APPLICATION
8V - 27V Unregulated DC Input +Vin 3 Gnd Cin 100uF + D1 1N5822
4 1 N2576 2 5 On/Off
Feedback Output L1 100uH
+5V, 3A Regulated Output
+ Cout 1000uF
N2576G-5
TO-220, TO263 Lead-Free
DEVICE SELECTION GUIDE
Device Voltage (V) Current (A) Package Marking TO-263 N2576SG-5 N2576SG-5 5 3 TO-220 N2576TG-5 N2576TG-5
mm Dimension A B C D E F G 28.5 14.6 8.4 0.73 28.9 15.0 8.8 0.83 29.3 15.4 9.2 0.93 Min. 9.78 2.61 Typ. 10.16 2.74 Max. 10.54 2.87 Dimension H I J K L M N 4.4 1.14 2.3 0.26 Min. 1.57 mm Typ. 1.7 6.81 4.6 1.27 2.6 0.46 7° 4.8 1.4 2.9 0.66 Max. 1.83

HM2576

1/133A Step-Down Voltage Regulator HM 2576DESCRIPITIONThe HM 2576 is monolithic integrated circuit that provides all the active functions for a step-down(buck) switching regulator, capable of driving 3A load with excellent line and load regulation. The HM 2576 available in fixed output voltages of 3.3V, 5V, and an adjustable output version.Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixed-frequency oscillator.The HM 2576 offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in some cases no heat sink is required.A standard of inductors optimized for use with the HM 2576 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies.Other features include a guaranteed ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring 50 µA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.FEATURES APPLICATIONS3.3V, 5V, and adjustable output versionsSimple high-efficiency step-down (buck) regulator Efficient pre-regulator for linear regulators On-card switching regulators Positive to negative converter (Buck-Boost)Guaranteed 3A output currentRequires only 4 external components52 kHz fixed frequency internal oscillatorTTL shutdown capability, low power standby modeHigh efficiencyUses readily available standard inductorsThermal shutdown and current limit protectionP+ Product Enhancement testedShenzhen H&M Semiconductor Co.Ltd http ：//CONNECTION DIAGRAMSBLOCK DIAGRAMR2=3.1K(Ta=25°C)Shenzhen H&M Semiconductor Co.Ltdhttp ：//RECOMMENDED OPERATING CONDITIONSCharacteristic Symbol Value Unit Supply Voltage V C C 40 VHM 2576-3.3 ELECTRICAL CHARACTERISTICS(Unless otherwise specified: T J = 25°C, and those with boldface type apply over full Operating Temperature Range.)HM 2576-5.0 ELECTRICAL CHARACTERISTICS(Unless otherwise specified: T J = 25°C, and those with boldface type apply over full Operating Temperature Range.)HM 2576-ADJ ELECTRICAL CHARACTERISTICSHM 2576HM 2576HM 2576HM 2576HM 2576HM 2576ELECTRICAL CHARACTERISTICS(Unless otherwise specified:T J = 25°C, and those with boldface type apply over fullOperating Temperature Range. Unless otherwise specified, V I N = 12V, I L O A D = 500 mA. )HM2576TEST CIRCUITHM2576HM2576 APPLICATION CIRCUITHM2576APPLICATION INFORMATIONINPUT CAPACITOR (C I N)To maintain stability, the regulator input pin must be bypassed with at least a 100 µF electrolytic capacitor. The capacitor’s leads must be kept short, and located near the regulator.If the operating temperature range includes temperatures below -25°C, the input capacitor value may need to be larger. With most electrolytic capacitors, the capacitance value decreases and the ESR increases with lower temperatures and age. Paralleling a ceramic or solid tantalum capacitor will increase the regulator stability at cold temperatures.INDUCTOR SELECTIONAll switching regulators have two basic modes of operation: continuous and discontinuous. The difference between the two types relates to the inductor current, whether it is flowing continuously, or if it drops to zero for a period of time in the normal switching cycle. Each mode has distinctively different operating characteristics, which can affect the regulator performance and requirements.The HM2576 (or any of the SIMPLE SWITCHER family) can be used for both continuous and discontinuous modes of operation.When using inductor values shown in the inductor selection guide, the peak-to-peak inductor ripple current will be approximately 20% to 30% of the maximum DC current. With relatively heavy load currents, the circuit operates in the continuous mode (inductor current always flowing), but under light load conditions, the circuit will be forced to the discontinuous mode (inductor current falls to zero for a period of time). This discontinuous mode of operation is perfectly acceptable. For light loads(less than approximately 300 mA)it may be desirable to operate the regulator in the discontinuous mode, primarily because of the lower inductor values required for the discontinuous mode.The selection guide chooses inductor values suitable for continuous mode operation,but if the inductor value chosen is prohibitively high, the designer should investigate the possibility of discontinuous operation. The computer design software Switchers MadeSimple will provide all component values for discontinuous (as well as continuous) mode of operation.Inductors are available in different styles such as pot core, toriod, E-frame, bobbin core, etc., as well as different core materials, such as ferrites and powdered iron. The leastexpensive, the bobbin core type, consists of wire wrapped on a ferrite rod core. This type of construction makes for an inexpensive inductor, but since the magnetic flux is not completely contained within the core, it generates more electromagnetic interference (EMI). This EMI can cause problems in sensitive circuits, or can give incorrect scope readings because of induced voltages in the scope probe.The inductors listed in the selection chart include ferrite pot core construction for AIE, powdered iron toroid for Pulse Engineering, and ferrite bobbin core for Renco.An inductor should not be operated beyond its maximum rated current because it may saturate. When an inductor begins to saturate, the inductance decreases rapidly and the inductor begins to look mainly resistive (the DC resistance of the winding). This will cause the switch current to rise very rapidly. Different inductor types have different saturation characteristics, and this should be kept in mind when selecting an inductor.The inductor manufacturer’s data sheets include current and energy limits to avoid inductor saturation.INDUCTOR RIPPLE CURRENTWhen the switcher is operating in the continuous mode, the inductor current waveform ranges from a triangular to a sawtooth type of waveform (depending on the input voltage). For a given input voltage and output voltage, the peak-topeak amplitude of this inductor current waveform remains constant. As the load current rises or falls, the entire sawtooth current waveform also rises or falls. The average DC value of this waveform is equal to the DC load current (in the buck regulator configuration).If the load current drops to a low enough level, the bottom of the sawtooth current waveform will reach zero, and the switcher will change to a discontinuous mode of operation. This is a perfectly acceptable mode of operation. Any buck switching regulator (no matter how large the inductor value is) will be forced to run discontinuous if the load current is light enough.OUTPUT CAPACITORAn output capacitor is required to filter the output voltage and is needed for loop stability. The capacitor should be located near the HM2576 using short pc board traces. Standard aluminum electrolytics are usually adequate, but low ESR types are recommended for low output ripple voltage and good stability. The ESR of a capacitor depends on many factors, some which are: the value, the voltage rating, physical size and the type of construction. In general, low value or low voltage (less than 12V) electrolytic capacitors usually have higher ESR numbers.The amount of output ripple voltage is primarily a function of the ESR (Equivalent Series Resistance) of the output capacitor and the amplitude of the inductor ripple current (∆I I N D). See the section on inductor ripple current in Application Hints.The lower capacitor values (220 µF–1000 µF) will allow typically 50 mV to 150 mV of output ripple voltage, while larger-value capacitors will reduce the ripple to approximately 20 mV to 50 mV.Output Ripple Voltage = (∆I I N D) (ESR of C O U T)To further reduce the output ripple voltage, several standard electrolytic capacitors may be paralleled, or a higher-grade capacitor may be used. Such capacitors are often called “high-frequency,” “low-inductance,” or “low-ESR.” These will reduce the output ripple to 10 mV or 20 mV. However, when operating in the continuous mode, reducing the ESR below 0.03Ω can cause instability in the regulator.Tantalum capacitors can have a very low ESR, and should be carefully evaluated if it is the only output capacitor. Because of their good low temperature characteristics, a tantalum can be used in parallel with aluminum electrolytics, with the tantalum making up 10% or 20% of the total capacitance.The capacitor’s ripple current rating at 52 kHz should be at least 50% higher than the peak-to-peak inductor ripple current.CATCH DIODEBuck regulators require a diode to provide a return path for the inductor current when the switch is off. This diode should be located close to the HM2576 using short leads and short printed circuit traces.Because of their fast switching speed and low forward voltage drop, Schottky diodes provide the best efficiency, especially in low output voltage switching regulators (less than 5V). Fast-Recovery, High-Efficiency, or Ultra-Fast Recovery diodes are also suitable, but some types with an abrupt turn-off characteristic may cause instability and EMI problems.A fast-recovery diode with soft recovery characteristics is a better choice. Standard 60 Hz diodes (e.g., 1N4001 or1N5400, etc.) are also not suitable.OUTPUT VOLTAGE RIPPLE AND TRANSIENTSThe output voltage of a switching power supply will contain a sawtooth ripple voltage at the switcher frequency, typically about 1% of the output voltage, and may also contain short voltage spikes at the peaks of the sawtooth waveform.The output ripple voltage is due mainly to the inductor sawtooth ripple current multiplied by the ESR of the output capacitor. (See the inductor selection in the application hints.)The voltage spikes are present because of the the fast switching action of the output switch, and the parasitic inductance of the output filter capacitor. To minimize these voltage spikes, special low inductance capacitors can be used, and their lead lengths must be kept short. Wiring inductance, stray capacitance, as well as the scope probe used to evaluate these transients, all contribute to the amplitude of these spikes.An additional small LC filter (20 µH & 100 µF) can be added to the output to further reduce theamount of output ripple and transients. A 10 x reduction in output ripple voltage and transients is possible with this filter.FEEDBACK CONNECTIONThe HM2576 (fixed voltage versions) feedback pin must be wired to the output voltage point of the switching power supply. When using the adjustable version, physically locate both output voltage programming resistors near the HM2576 to avoid picking up unwanted noise. Avoid using resistors greater than 100 k. because of the increased chance of noise pickup.ON /OFF INPUTFor normal operation, the ON /OFF pin should be grounded or driven with a low-level TTL voltage (typically below 1.6V). To put the regulator into standby mode, drive this pin with a high-level TTL or CMOS signal. The ON /OFF pin can be safely pulled up to +V I N without a resistor in series with it. The ON /OFF pin should not be left open.GROUNDINGTo maintain output voltage stability, the power ground connections must below-impedance. For the5-lead TO-220 astyle package, both the tab and pin 3 are ground and either connection may be used, as they are both part of the same copper lead frame.HEAT SINK/THERMAL CONSIDERATIONSIn many cases,only a small heat sink is required to keep the HM2576 junction temperature within the allowed operating range. For each application, to determine whether or not a heat sink will be required, the following must be identified:1. Maximum ambient temperature (in the application).2. Maximum regulator power dissipation (in application).3. Maximum allowed junction temperature (125°C for the HM2576). For a safe, conservative design, a temperature approximately 15°C cooler than the maximum temperatures should be selected.4. HM2576 package thermal resistances θJ A and θJ C.Total power dissipated by the HM2576 can be estimated as follows:P D = (V I N)(I Q) + (V O/V I N)(I L O A D)(V S A T)where I Q (quiescent current) and VSAT can be found in the Characteristic Curves shown previously, V I N is the applied minimum input voltage, V O is the regulated output voltage,and I L O A D is the load current. The dynamic losses during turn-on and turn-off are negligible if a Schottky type catch diode is used.When no heat sink is used, the junction temperature rise can be determined by the following: ∆T J = (P D) (θJ A)To arrive at the actual operating junction temperature, add the junction temperature rise to the maximum ambient temperature. T J= ∆T J + T AIf the actual operating junction temperature is greater than the selected safe operating junction temperature determined in step 3, then a heat sink is required.When using a heat sink, the junction temperature rise can be determined by the following: ∆T J = (P D) (θJ C+ θinterface + θHeat sink)The operating junction temperature will be: T J= T A + ∆T JAs above, if the actual operating junction temperature is greater than the selected safe operating junction temperature, then a larger heat sink is required (one that has a lower thermal resistance).Included on the Switcher Made Simple design software is a more precise (non-linear) thermal model that can be used to determine junction temperature with differentinput-output parameters or different component values. It can also calculate the heat sink thermal resistance required to maintain the regulators junction temperature below the maximum operating temperature.CHARACTERISTIC CURVESOUTLINE DRAWINGTO-220(T)HM 2576HM2576TO-220(B) HM2576TO-263。

IL2576S资料

η
Vout Vout
78
14.7
14.4 14.25
-
%
15.3
V
V
15.6
元器件交易网
TECHNICAL DATA
3.0 A, 15 V, Step-Down Switching Regulator
IL2576-xx
The IL2576 series of regulators are monolithic integrated
circuits ideally suited for easy and convenient design of a step–
(Unless otherwise specified, Vin = 12 V for the 3.3 V, 5.0 V, and Adjustable version, Vin = 25 V for the 12 V version, and Vin = 30 V for
the 15 V version. ILoad = 500 mA, TJ = 25°C, for min/max values TJ is the operating junction temperature range that applies [Note 2],
Features
• 3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output Versions • Adjustable Version Output Voltage Range, 1.23 to 37 V ±4%
Maximum Over Line and Load Conditions • Guaranteed 3.0 A Output Current • Wide Input Voltage Range • Requires Only 4 External Components • 52 kHz Fixed Frequency Internal Oscillator • TTL Shutdown Capability, Low Power Standby Mode • High Efficiency • Uses Readily Available Standard Inductors • Thermal Shutdown and Current Limit Protection

P2576

UNISONIC TECHNOLOGIES CO., LTDP2576 LINEAR INTEGRATED CIRCUIT3A STEP-DOWN VOLTAGE SWITCHING REGULATORDESCRIPTIONAs a step-down (buck) switching regulator, the UTC P2576provides drives 3A load. The UTC P2576only needs to use a minimum number of external components.Frequency compensation and a fixes-frequency oscillator are in it. UTC P2576simplifying the switch mode power supplies’ design. UTC P2576frequency. Its external shutdown is included with 50μcurrent. As well as thermal shutdown for full protection under fault conditions, the output switch has cycle by cycle current limiting.FEATURES* Output Current 3A* Input Voltage Range from 7V to 40V * Requires 4 External Components * Very High Efficiency * TTL Shutdown* Low Power Standby Mode * Thermal Shutdown, * Current Limit Protection* Internal Oscillator: 52 kHz Fixed FrequencyORDERING INFORMATIONOrdering NumberPackage PackingLead Free Halogen FreeP2576L-xx-TA5-T P2576G-xx-TA5-T TO-220-5 Tube P2576L-xx-TB5-T P2576G-xx-TB5-T TO-220B Tube P2576L-xx-TQ5-R P2576G-xx-TQ5-R TO-263-5 Tape Reel P2576L-xx-TQ5-T P2576G-xx-TQ5-T TO-263-5 Tube P2576L-xx-S08-R P2576G-xx-S08-R SOP-8 Tape Reel P2576L-xx-S08-T P2576G-xx-S08-T SOP-8 Tube P2576L-xx-SH2-R P2576G-xx-SH2-R HSOP-8 Tape Reel P2576L-xx-SH2-T P2576G-xx-SH2-T HSOP-8 TubeNote: xx: Output Voltage, refer to Marking Information.PIN CONFIGURATION of SOP-8/HSOP-8GND FB GND GND GNDV IN V OUT ON/OFFPIN DESCRIPTIONSMARKING INFORMATIONPage 2限公司BLOCK DIAGRAMPage3深圳市众达安科技有限ABSOLUTE MAXIMUM RATINGS (T A =25°C, unless otherwise specified)Absolute maximum ratings are stress ratings only and functional device operation is not implied.ELECTRICAL CHARACTERISTICS (T J =25°C, V IN =12V, I LOAD =500mA.)=2. 3. 4. Feedback pin removed from output and connected to 0V.Feedback pin removed from output and connected to +12V, to force the output transistor OFF.The oscillator frequency reduces to approximately 11 kHz in the event of an output short or an overload which causes the regulated output voltage to drop approximately 40% from the nominal output voltage. This self- protection feature lowers the Average power dissipation of P2576 by lowering the minimum duty cycle from 5% down to approximately 2%.Page 4APPLICATION CIRCUIT+5V 3A LoadDC InputPage 5深圳市众达安科TYPICAL TEST CIRCUITC I : 100μF,75V C O : 680μF,25VD 1: Schottky, MBR360L 1: 100μH R 1: 2K, 0.1%R 2: 6.12K, 0.1%Note: R R(V V REF OUT121+=)V V (R R REFOUT112−= (Where V REF =1.23V, R1 between 1k and 5k.)科技TYPICAL APPLICATION CIRCUIT (T A =25°C, V CC =12V, unless otherwise specified)S a t u r a t i o n V o l t a g e (V)O u t p u t C u r r e n t (A)Dropout Voltage2.01.51.00.5-75025125150Junction Temperature (°C)I n p u t -O u t p u t D i f f e r e n t i a l (V )-50-251005075020Input Voltage (V)Q u i e s c e n t C u r r e n t (m A )81816141210102030405060Quiescent Current2224Standby Quiescent Current 7560025125Junction Temperature (°C)-50-251005075S t a n d b y Q u i e s c e n t C u r r e n t (µA )70ON/OFF PIN:5V=40VO u t p u t V o l t a g e D e v i a t i o n (V )Time(ms)Load Transient ResponseL o a d C u r r e n t (A )-11300.4 1.21.6 2.02.4 2.80.8 3.64.03.2=5V@3A深圳市众达安有公司TYPICAL APPLICATION CIRCUIT(Cont.)20.00Duty Cycle (％)Q u i e s c e n t C u r r e n t (m A )2.55.017.515.012.510.07.520406080100Quiescent Current vs. Duty Cycle20.00Duty Cycle (％)F e e d b a c k V o l t a g e C h a n g e (m V )-15.0-10.015.010.0-5.020406080100Feedback Voltage vs Duty Cycle5.00-20.040.022.525.037.535.032.530.027.5F e e d ba ckP i n C u r r e n t (n A)O u t p u tI n d u c t o rUTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.深圳市众达公司。

S72N36资料

7S72Nxx S e m i c o n d u c t o rStandard Voltage DetectorMaximum ratings (Ta=25°C)Characteristic Symbol Ratings UnitSupply voltageVcc -0.3 ~ +10 V Power Dissipation (Package Limitation) PD 500 mW Operating Temperature Topr -20 ~ +75 ℃ Storage TemperatureTstg-40 ~ +125℃Electrical Characteristics (Vcc=5V , Ta=25°C)Characteristic SymbolTest CircuitTest Condition Min.Typ. Max.UnitDetecting V oltage VS 1 * See Table 1Hysteresis V oltage ΔVS 1 RL=470Ω,VCC=L →H →L 40 100 300 mV Temperature Coefficient Of detecting voltage VS/ΔT 1 RL=470Ω, Ta= -20~75℃ -±0.01-%/℃Low Level Output voltage VOL 1 RL=470Ω, VCC= VS Min - 0.1 0.4 V Circuit current at ON ICCL 1 RL=∞Ω, VCC= VS Min - 100 180 µA Circuit current at OFF ICCH 1 RL=∞Ω,VCC=VS Max +0.1V - 1.0 2.5 µA Threshold Operating V oltage V opr 1 RL=4.7㏀, VOL ≤0.4V - 1.4 1.6 V Output Current at ON I IOL 1 1 RL=0Ω, VCC= VS Min 10 20 - mA Output Current at ON II IOL 21RL=0Ω, VCC= VS Min ,Ta= -20~75℃5 - - mA L →H Transmission delay time tPLH 2 RL=4.7㏀, CL=100㎊ - 100 500 ㎲ H →L Transmission delay timetPHL 2 RL=4.7㏀, CL=100㎊- 10 20 ㎲* Table 1Electrical Characteristics (Vcc=5V , Ta=25°C)Characteristic SymbolTestCircuitTest ConditionMin.Typ.Max.UnitS72N45 4.30 4.5 4.70 S72N42 4.00 4.2 4.40 S72N39 3.70 3.9 4.10 S72N36 3.40 3.6 3.80S72N33 3.10 3.3 3.50 S72N31 2.90 3.1 3.30 S72N29 2.75 2.9 3.05 S72N27 2.55 2.7 2.85 S72N25 2.35 2.5 2.65 Detecting voltage VS 1RL=470ΩVCC=H →L VOL ≤0.4VS72N23 2.15 2.3 2.45V(1) Battery Low IndicatorTest Circuit 2Application Circuit(Note)(1) Connecting of LED and R2 obtains a voltage drop indicator.(2) Connecting of C1 and selection of time constant with C1 and R1 set the power on delay time.Test Circuit 1S72Nxx Electrical Characteristic CurvesS72Nxx Fig. 7 I – T Fig. 8 I CCH – T aFig. 9 C L – t PLHS72NxxThese AUK products are intended for usage in general electronic equipments(Office and communication equipment, measuring equipment, domestic electrification, etc.).Please make sure that you consult with us before you use these AUK products in equipm-ents which require high quality and/or reliability, and in equipments which could have major impact to the welfare of human life(atomic energy control, airplane, spaceship, traffic signal, combustion central, all types of safety device, etc.).AUK cannot accept liability to any damage which may occur in case these AUK products were used in the mentioned equipments without prior consultation with AUK.。