LM2596R中文资料
LM2596中文资料
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LM2596S-3.3, LM2596S-5.0,LM2596S-12, LM2596S-ADJ为TO-263封装(SMT)。
η
效率
VIN=12V,ILOAD=3A
73
LM2596□—5.0 (见注 14)
VOUT
输出电压
5.0 7V≤VIN≤40V, 0.2A≤ILOAD≤3A
η
效率
VIN=12V,ILOAD=3A
80
3.168/3.135 3.432/3.465
V V(min) V(max) %
4.800/4.750 5.200/5.250
2 30
A A(min) A(max) μA(max) mA mA(max)
IQ
静电流
见注 9
5 10
mA mA(max)
ISTBY
待机静电流
ON/OFF 脚=5V(OFF)(9)
80
μA
200/250
μA(max) 3
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LM2596 开关电压调节器 SEPTEMBER, 2004
ILOAD=500mA。 (见注 14)
361 符号
参量
cu 器件参数
.m Ib
反馈偏置电流
wwwfO
振荡器频率
条件
LM2596□—XX
典型值(2) 极限值(3)
单位
只适用于输出可调节的情况,VFB=1.3V
LM2576中文资料_数据手册_参数
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电子元器件采购网-万联芯城 提供中小批量 电子元器件一站式配套采购业务,保证所售产品均为优质原装现 货,万联芯城主打的优势授权代理品牌产品,包括长电科技,顺 络电子,先科 ST 等,价格优势明显。万联芯城已与全国各大终 端工厂企业形成战略合作伙伴关系,欢迎广大采购客户咨询这种降压 - 升压配置中的开关电流是高于标准的降压模式设计,从而降低LM2576可用的输出电流.另外, 启动输入电流的升降压转换器的电压高于标准降压模式调节器,这可能会使LM2576输入功率过载电流限制小于5A.使用延迟导通或欠 压闭锁电路(在第二章中描述)下一节)将允许输入电压升高足够的水平之前,切换器将被允许转向上.由于降压和降压的结构性差 异降压 - 升压型稳压器拓扑,降压型稳压器,签名程序部分不能用来选择电感或输出电容.推荐的范围降压 - 升压设计的电感值在 68μH之间和220μH,输出电容值必须更大比降压设计通常所需要的要多.低输入电压或高输出电流需要较大的输出值电容器(数千 微法拉).峰值电感电流与峰值相同开关电流,可以从以下公式计算:哪里f osc = 52kHz. 在正常的连续电感下当前的运行条件,小的V IN 表示坏的情况.选择一个额定值为峰值的电感目前预计.此外,整个调节器出现的大电压是输入和输出电压的绝对总和.对于-12V输 出,LM2576的大输入电压是+ 28V,或者LM2576HV的+ 48V. Switchers Made Simple(版本3.0)设计软件可以用来确定调节器设计的可 行性使用不同的拓扑结构,不同的输入输出参数,不同的组件等负增压调压器降压 - 升压拓扑的另一个变化是否定的升压配置.图11中 的电路接受一个输入电压范围从-5V到-12V,并提供一个稳压 -12V输出.输入电压大于-12V将导致输出上升到-12V以上,但不会损坏 稳压器.由于这种类型的调节器的助推功能,开关电流相对较高,尤其是在低输入电压下,年龄.输出负载电流的限制是这个结果的结 果交换机的大额定电流.此外,助推监管机构不能提供限流负载保护短路的负载,所以一些其他的手段(如保险丝)可能是必要的.欠 压闭锁在某些应用中,LM2576需要关闭稳压器直到输入电压达到一定的阈值.一个und-完成这个任务的电压锁定电路是如图12所 示,LM2576应用提示 (续)捕捉二极管降压调节器需要一个二极管来提供一个返回路径开关关闭时的电感电流.这个二极管应该靠近 LM2576使用短引线和短路印刷电路痕迹.由于其开关速度快,正向电压低,年龄下降,肖特基二极管提供佳的效率,在低输出电压开 关稳压器(低于 5V).快速恢复,高效率或超快速恢复二极管也是合适的,但有些类型的突然关断特性可能导致不稳定和EMI问题 LEMS.具有软恢复特性的快速恢复二极管是一个更好的选择.标准60 Hz二极管(例如,1N4001或 1N5400等)也不适合.参见图8的Schottky和“软”快速恢复二极管选择指南.输出电压纹波和瞬态开关电源的输出电压将包含一个典型的LM2576切换器频率处的锯齿纹波电 压约为输出电压的1%,也可能包含短路锯齿波峰值处的电压尖峰.输出纹波电压主要是由于电感的锯齿波,齿纹波电流乘以输出的 ESR电容. (请参阅应用中的电感选择提示.)电压尖峰是因为速度快而出现的输出开关的开关动作,以及寄生电感 - 输出滤波电容的 大小.为了小化这些电压尖峰,特殊的低电感电容器可以使用,和他们的铅长度必须保持短.接线电感,杂散电容以及用于评估的示波 器探头 - 吃这些瞬态,都有助于这些振幅尖峰.可以添加额外的小型LC滤波器(20μH和100μF)到输出(如图15所示)以进一步减少 输出纹波和瞬变量.减少10倍输出纹波电压和瞬态是可能的这个过滤器.反馈连接 LM2576(固定电压版本)反馈LM2576引脚必须是连 接到开关电源的输出电压点供应.使用可调版本时,LM2576物理定位两个输出电压编程电阻器靠近LM2576避免拾取不必要的噪音.避 免使用电阻大于100 k Ω因为增加的机会噪音拾取.开/关输入正常操作时,ON / OFF引脚应接地或以低电平TTL电压(通常低于1.6V) 驱动.要使稳压器进入待机模式,使用a来驱动此引脚高电平TTL或CMOS信号. ON / OFF引脚可以安全地拉到+ V IN 没有与它串联的电 阻.
LM2596全中文资料
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LM2596 开关电压调节器LM2596开关电压调节器是降压型电源管理单片集成电路,能够输出3A的驱动电流,同时具有很好的线性和负载调节特性。
固定输出版本有3.3V、5V、12V,可调版本可以输出小于37V的各种电压。
该器件内部集成频率补偿和固定频率发生器,开关频率为150KHz,与低频开关调节器相比较,可以使用更小规格的滤波元件。
由于该器件只需4个外接元件,可以使用通用的标准电感,这更优化了LM2596的使用,极大地简化了开关电源电路的设计。
其封装形式包括标准的5脚TO-220封装(DIP)和5脚TO-263表贴封装(SMD)。
该器件还有其他一些特点:在特定的输入电压和输出负载的条件下,输出电压的误差可以保证在±4%的范围内,振荡频率误差在±15%的范围内;可以用仅80μA的待机电流,实现外部断电;具有自我保护电路(一个两级降频限流保护和一个在异常情况下断电的过温完全保护电路)特点※ 3.3V、5V、12V的固定电压输出和可调电压输出※可调输出电压范围1.2V~37V±4%※输出线性好且负载可调节※输出电流可高达3A※输入电压可高达40V※采用150KHz的内部振荡频率,属于第二代开关电压调节器,功耗小、效率高※低功耗待机模式,I Q的典型值为80μA※TTL断电能力※具有过热保护和限流保护功能※封装形式:TO-220(T)和TO-263(S)※外围电路简单,仅需4个外接元件,且使用容易购买的标准电感应用领域※高效率降压调节器※单片开关电压调节器※正、负电压转换器典型应用(固定输出)LM2596□-5.0管脚图极限参数名称范围单位最大电源电压 45 V脚输入电压-0.3~25 V“反馈”脚电压 -0.3~25 V到地的输出电压(静态) -1 V功耗由内部限定 --储存温度 -65~150℃静电释放(人体放电1) 2000 V气流焊(60秒) 215 ℃ TO-263红外线焊接(10秒) 245 ℃ 焊接时的管脚温度TO-220 波峰焊/电烙铁焊接(10秒)260℃最高结温 150 ℃温度范围 -40~125℃工 作条 件电源电压 4.5~40 V注1:人体放电模式相当于一个100PF 的电容通过一个1.5K 的电阻向每个管脚放电。
lm2596中文资料
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VIN=25V,VOUT =3V, ILOAD=3A
η
效率
VIN=25V,VOUT =15V,ILOAD=3A
电气特性(所有输出)
典型值(2) 极限值(3)
单位
12.0
88 1.230
73 90
11.52/11.40 12.48/12.60
V V(min) V(max) %
1.193/1.180 1.267/1.280
2000
V
气流焊(60 秒)
215
℃
焊接时的管脚
TO-263
温度
红外线焊接(10 秒)
245
℃
TO-220
波峰焊/电烙铁焊接(10 秒)
260
℃
最高结温
150
℃
工 作条 件
温度范围 电源电压
-40~125
℃
4.5~40
V
注 1:人体放电模式相当于一个 100PF 的电容通过一个 1.5K 的电阻向每个管脚放电。
电气特性
说明:标准字体对应的项目适合于 TJ=25℃时,带下划线的粗斜体字对应的项目适合于整个温度范围; 系统参量(4) 测试电路见图 1
符号
参量
条件
典型值(2)
极限值(3)
单位
LM2596□—3.3 (见注 14)
VOUT
输出电压
3.3 4.75V≤VIN≤40V,
0.2A≤ILOAD≤3A
η
效率
A(max)
50
μA(max)
2 30
mA mA(max)
5 10
mA mA(max)
80
μA
200/250
μA(max) ˏ
LM2596芯片简介
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编辑本段LM2596芯片简介LM2596系列是美国国家半导体公司生产的3A电流输出降压开关型集成稳压芯片,它内含固定频率振荡器(150KHZ),和基准稳压器(1.23v),并具有完善的保护电路:电流限制、热关断电路等。
利用该器件只需极少的外围器件便可构成高效稳压电路。
提供有:3.3V、5V、12V及可调(-ADJ)等多个电压档次产品。
此外,该芯片还提供了工作状态的外部控制引脚。
LM2596芯片LM2596系列开关稳压集成电路的主要特性如下:1、最大输出电流:3A2、最高输入电压:40V3、输出电压:3.3V、5V、12V及(ADJ)等,最大输出电压37V4、震荡频率:150KHZ5、转换效率:75%~88%(不同电压输出时的转换效率不同)6、工作温度范围:-40℃~+125℃7、工作模式:低功耗/正常两种模式。
可外部控制8、工作模式控制:TTL电平相容9、所需外部组件:仅四个(不可调);六个(可调)10、器件保护:热关断及电流限制11、封装形式:5脚(TO-220(T);TO-263(S))编辑本段LM2596内部框图LM2596芯片内部框图。
注:此图为TO-220封装形式的内部框图。
LM2596内部包含150KHZ振荡器、1.23v基准稳压电路、热关断电路、电流限制电路、放大器、比较器和内部[1]稳压电路等。
为了产生不同的输出电压通常将比较器的负端接基准电压(1.23V ),正端接分压电阻网络。
其中R1=1KΩ,R2分别为1.7KΩ(3.3v),3.1KΩ(5V),8.8KΩ(12V)、0(-ADJ)。
将输出电压的分压电阻网络的输出同内部基准稳压值1.23V进行比较,若电压有偏差,则可用放大器控制内部振荡器的输出占空比,从而使输出电压保持稳定。
编辑本段LM2596经典应用实例具体应用时可根据需要选择:LM2596-5V、LM2596-3.3等。
要获得+1.8V、+5V输出电压时请选用A图,要获得+3.3V输出电压时请选用B图。
lm2596中文资料
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VFB
反馈电压
0.2A≤ILOAD≤3A
VOUT 调为 3V, 电路图见图 1
η
效率
VIN=25V,VOUT =3V, ILOAD=3A
VIN=25V,VOUT =15V,ILOAD=3A
电气特性(所有输出)
典型值(2) 极限值(3)
单位
12.0
88 1.230
73 90
11.52/11.40 12.48/12.60
特点
※ 3.3V、5V、12V 的固定电压输出和可调电压输出 ※ 可调输出电压范围 1.2V~37V±4% ※ 输出线性好且负载可调节 ※ 输出电流可高达 3A ※ 输入电压可高达 40V ※ 采用 150KHz 的内部振荡频率,属于第二代开关电压调节器,功耗小、效率高 ※ 低功耗待机模式,IQ 的典型值为 80μA ※ TTL 断电能力 ※ 具有过热保护和限流保护功能 ※ 封装形式:TO-220(T)和 TO-263(S) ※ 外围电路简单,仅需 4 个外接元件, 且使用容易购买的标准电感
5
TO-263 封装(S)尺寸图
单位:英寸/毫米
TO-220 封装(T)尺寸图
单位:英寸/毫米
6
设计步骤及实例
固定输出调节器的设计步骤
条件:VOUT=3.3(或 5 、或 12)V , VIN(max)为最大直流输入电压, ILOAD(max)为最大负载电流 步骤: 1. 电感的选择(L1) A. 要根据图 4、图 5 和图 6 所示的数据选择电感的适当值(分别对应输出电压为 3.3V、5V 和 12V),对于所有的
符号
参量
器件参数
Ib
反馈偏置电流
fO
振荡器频率
VSAT
lm2596-3.3__LM2596-ADJ_LM2596-12_LV2596-3.3_中文资料
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见注 9
5 10
mA mA(max)
ISTBY
待机静电流
ON/OFF 脚=5V(OFF)(9)
80
μA
200/250
μA(max)
3
符号
参量
条件
θJC
θJA
θJA
热阻
θJA
θJA
ON/OFF 控制 ( 测试电路见图 1)
TO-220 或 TO-263 TO-263(10) TO-263(11) TO-263(12) TO-263(13)
V V(max)
最大工作周期(ON) DC
最小工作周期(OFF)
见注 7 见注 8
100
%
0
%
ICL
极限电流
峰值电流(6,7)
4.5 3.6/3.4
A A(min)
6.9/7.5
A(max)
输出为 0V(6,8)
50
μA(max)
IL
输出漏电流
输出为-1V(9)
2 30
mA mA(max)
IQ
静电流
特点
※ 3.3V、5V、12V 的固定电压输出和可调电压输出 ※ 可调输出电压范围 1.2V~37V±4% ※ 输出线性好且负载可调节 ※ 输出电流可高达 3A ※ 输入电压可高达 40V ※ 采用 150KHz 的内部振荡频率,属于第二代开关电压调节器,功耗小、效率高 ※ 低功耗待机模式,IQ 的典型值为 80μA ※ TTL 断电能力 ※ 具有过热保护和限流保护功能 ※ 封装形式:TO-220(T)和 TO-263(S) ※ 外围电路简单,仅需 4 个外接元件, 且使用容易购买的标准电感
ON/OFF 脚逻辑输入
LM2596全中文资料
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LM2596全中文资料随着电子技术的发展,各种电子设备越来越多,而其中一个重要的电源管理模块就是开关电源。
在电子设备中,开关电源起着将交流电转换为直流电的作用,提供稳定可靠的电力供应。
而LM2596是一种常见的开关稳压模块,它被广泛应用于各种电子设备中,提供高效、稳定的电源管理解决方案。
LM2596是一款具有高效率、低功耗和稳定性的降压型开关稳压模块。
它能够将输入电压转换为相对稳定的输出电压,通常被用于降低电源电压供应至微控制器、电路板、传感器等部件。
同时,LM2596还具备短路保护、过热保护等功能,以确保电子设备的安全运行。
LM2596采用了开关型调制控制技术,能够在不同负载情况下自动调整开关频率和占空比,以保持输出电压稳定。
它的输入电压范围广,可以适应不同的电源输入,包括交流电和直流电。
而输出电压可通过外部电阻分压调整,从而满足不同电子设备的需求。
除了稳压功能,LM2596还具备过流保护功能。
当电流超过设定值时,它会自动切断输出,避免因电流过大而损坏电子设备。
同时,LM2596还配备了过热保护功能,当温度超过一定范围时,它会自动降低工作频率或停止工作,以防止过热引起故障。
LM2596作为一种常见的开关稳压模块,其技术参数和应用案例都有详尽的中文资料可供参考。
对于初学者而言,这些资料不仅提供了LM2596的基本工作原理和使用方法,还介绍了它在各种电子设备中的具体应用场景和性能要求。
其中,电路图、元器件清单和详细的步骤说明,使得初学者能够更好地理解和使用LM2596。
此外,还有一些中文论坛和社区提供了关于LM2596的技术讨论和使用心得的帖子。
这些帖子通常包含了实际应用中遇到的问题和解决方案,对于学习和掌握LM2596的使用具有很大帮助。
在这些中文论坛中,你可以与其他电子爱好者交流经验,共同探讨LM2596的使用技巧。
综上所述,LM2596作为一种常见的开关稳压模块,提供了高效、稳定的电源管理解决方案。
LM2596R-3.3中文资料
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元器件交易网3.0A, 150Khz, Step-Down Switching RegulatorFEATURES3.3V, 5.0V, 12V, 15V, and Adjustable Output Versions Adjustable Version Output Voltage Range, 1.23 to 37V +/- 4%. Maximum Over Line and Load Conditions Guaranteed 3.0A Output Current Wide Input Voltage Range Requires Only 4 External Components 150Khz Fixed Frequency Internal Oscillator TTL Shutdown Capability, Low Power Standby Mode High Efficiency Uses Readily Available Standard Inductors Thermal Shutdown and Current Limit Protection Moisture Sensitivity Level(MSL) Equals1 TO-263(D2) TO-220V TO-220LM2596ApplicationsSimple High-Efficiency Step-Down(Buck) Regulator Efficient Pre-Regulator for Linear Regulators On-Card Switching Regulators Positive to Negative Converter(Buck-Boost) Negative Step-Up Converters Power Supply for Battery Chargers1. 2. 3. 4. 5. Vin Output Ground Feedback On/OffDESCRIPTIONThe LM2596 series of regulators are monolithic integrated circuits ideally suited for easy and convenient design of a step-down switching regualtor(buck converter). All circuits of this series are capable of driving a 3.0A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5.0V,12V, 15V, and an adjustable output version.ORDERING INFORMATIONDevice LM2596T-X.X LM2596TV-X.X LM2596R Marking LM2596T-X.X LM2596T-X.X LM2596R-X.X Package TO-220 TO-220V TO-263These regulatiors were designed to minimize the number of externalcomponents to simplify the power supply design. Standard series of inductors optimized for use with the LM2576 are offered by several different inductor manufacturers. Since the LM2596 converter is a switch-mode power supply, its efficiency is significantly higher in comparison with popular three-terminal limear reguators, especially with higher input voltages. In many cases, the power dissipated is so low that no heatsink is required or its size could be reduced dramatically. A standard series of inductors optimized for use with the LM2596 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies. The LM2596 features include a guaranteed +/- 4% tolerance on output voltage within specified input voltages and output load conditions, and +/-15% on the oscillator frequency (+/- 2% over 0oC to 125 oC). External shutdown is included, featuring 80 uA(typical) standby current. The output switch includes cycle-bycycle current limiting, as well as thermal shutdown for full protection under fault conditions.HTC1Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorTypical Application (Fixed Output Voltage Versions)LM2596LM2596-5.033 uH680 uF1N5824220 uFFigure 1. Block Diagram and Typical ApplicationABSOLUTE MAXIMUM RATINGS(Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.)Power DissipationTO-220, 5-LeadThermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-caseTO-263Thermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-caseHTC2Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorLM2596OPERATING RATINGS (Operating Ratings indicate conditions for which the device is intended to befunctional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.)ELECTRICAL CHARACTERISTICS / SYSTEM PARAMETERS ([Note 1] Test Circuit Figure 2) (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. For typical values TJ = 25°C, for min/max values TJ is the operating junction temperature range that applies [Note 2], unless otherwise noted.)LM2596-3.3 ([ Note 1]. Test Circuit Figure 2 )73 LM2596-5.0 ([ Note 1]. Test Circuit Figure 2 ) 180 LM2596-12 ([ Note 1]. Test Circuit Figure 2 )90 LM2596-15 ([ Note 1]. Test Circuit Figure 2 )98 LM2596-ADJ ([ Note 1]. Test Circuit Figure 2 )73HTC3Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorELECTRICAL CHARACTERISTICS / Device ParametersLM2596(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. For typical values Tj = 25°C, for min/max values Tj is the operating junction temperature range that applies [Note 2], unless otherwise noted.)10 0 127 110 15050 100 173 1731.16 01.4 1.53.6 3.4100 4.5 6.9 7.5 50 30 1002 5 00 2 0 2.0 2.0 2 V LOGIC = 2.5V (Regulator OFF) V LOGIC = 0.5V (Regulator ON) 5 0.02 1.3 1.32500.6 0.6 15 5.001. External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the LM2596 is used as shown in the Figure 1 test circuit, system performance will be as shown in system parameters section . 2. Tested junction temperature range for the LM2596 : TLOW = –0°C THIGH = +125°C 3. The oscillator frequency reduces to approximately 18 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 dissipation of the IC by lowering the minimum duty cycle from 5% down to approximately 2%. 4. Output (Pin 2) sourcing current. No diode, inductor or capacitor connected to output pin. 5. Feedback (Pin 4) removed from output and connected to 0 V. 6. Feedback (Pin 4) removed from output and connected to +12 V for the Adjustable, 3.3 V, and 5.0V ersions, and +25 V for the 12 V and15 V versions, to force the output transistor “off”. 7. Vin = 40 V.HTC4Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorTYPICAL PERFORMANCE CHARACTERISTICS (Circuit of Figure 2)LM2596HTC5Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorTYPICAL PERFORMANCE CHARACTERISTICS (Circuit of Figure 2)Feedback Pin Bias CurrentLM2596HTC6Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorTest Circuit and Layout GuidelinesLM2596Figure 2. Typical Test Circuits and Layout GuideAs in any switching regulator, layout is very important. Rapidly switching currents associated with wiring inductance can generate voltage transients which can cause problems. For minimal inductance and ground loops, the wires indicated by heavy lines should be wide printed circuit traces and should be kept as short as possible. For best results, external components should be located as close to the switcher lC as possible using ground plane construction or single point grounding. If open core inductors are used, special care must be taken as to the location and positioning of this type of inductor. Allowing the inductor flux to intersect sensitive feedback, lC groundpath and COUT wiring can cause problems. When using the adjustable version, special care must be taken as to the location of the feedback resistors and the associated wiring. Physically locate both resistors near the IC, and route the wiring away from the inductor, especially an open core type of inductor.HTC7Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorLM2596PIN FUNCTION DESCRIPTION Symbol 1VinDescription This pin is the positive input supply for the LM2596 step–down switching23 45regulator.In order to minimize voltage transients and to supply the switching currents needed by the regulator, a suitable input bypass capacitor must be present .(Cin in Figure 1). Output This is the emitter of the internal switch. The saturation voltage Vsat of this output switch is typically 1.5 V. It should be kept in mind that the PCB area connected to this pin should be kept to a minimum in order to minimize coupling to sensitive circuitry. Circuit ground pin. See the information about the printed circuit board layout. Gnd Feedback This pin senses regulated output voltage to complete the feedback loop. The signal is divided by the internal resistor divider network R2, R1 and applied to the non–inverting input of the internal error amplifier. In the Adjustable version of the LM2596 switching regulator this pin is the direct input of the error amplifier and the resistor network R2, R1 is connected externally to allow programming of the output voltage. ON/OFF It allows the switching regulator circuit to be shut down using logic level signals, thus dropping the total input supply current to approximately 80 mA. The threshold voltage is typically 1.4 V. Applying a voltage above this value (up to +Vin) shuts the regulator off. If the voltage applied to this pin is lower than 1.4V or if this pin is left open, the regulator will be in the "on" conditionHTC8Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorLM2596PACKAGES DIMENSION : TO220-5LHTC9Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorPACKAGES DIMENSION : TO220V-5LLM2596HTC10Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorLM2596PACKAGES DIMENSION : TO263-5LHTC11Oct 2004 - Rev 0。
lm2596中文资料_数据手册_参数
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·Regulatorsfrequency卡片上的切换。包括外部关闭,·正到负Convertertypically 80μa 待机电流。自我保护特性包括输出开关的两级频率减少电流限制和完全保护故障状 态下的过热关闭。(1)(1)__专利号5382918。典型应用(固定输出电压版本)请注意,关 于lm2596德州仪器半导体产品和免责lm2596声明的可用性、标准保证和关键应用的 一个重要通知出现在本数据表的末尾。简单切换器是德州仪器的注册商标。所有其 他商标都是其各自所有者的财产。生产数据信息是当前出版日期。版权©1999 - 2013 年,德州仪器IncorporatedProducts符合规格/ TexasInstruments标准保修条款。生产加工 不连接DiagramsFigure 1。5根引线弯曲交错,如图2所示。5-Lead DDPAK/TO-263 (S) PackageThrough Hole TO-220 (T) PackageSee Package Number KTT0005BSee Package Number NDH0005DThese devices have limited内置ESD protection。在储存或处理过程 中,应将引线短接在一起,或将设备置于导电泡沫中,以防止对MOS门的静电损 坏。绝对最大额定参数(1)(2)最大供应Voltage45VON /关销输入电压 0.3 V≤≤+ 25 vfeedback销电压0.3 V≤≤25 + voutput对地电压(稳态) 1 vpower DissipationInternally limitedStorage温度范围 65°C + 150°CESD SusceptibilityHuman身体模型(3)2 kVLead TemperatureDDPAK / - 263 PackageVapor阶段(60秒。)+ 215°CInfrared(10秒)+ 245° 首席技术官- 220包(焊接,10秒)+ 260°CMaximum结温+ 150°C(1)绝对最大额定参数 表明超过这个限制可能发生损坏设备。操作额定值指示设备功能的条件,但不保证 特定的性能限制。(2)如果需lm2596要军用/航空航天专用设备,请与德州仪器销售 办公室/分销商联系,了解其可用性和规格。操作ConditionsTemperature范围 40° C≤TJ≤+ 125°CSupply Voltage4.5V 40 v2submit文档FeedbackCopyright©1999 - 2013年, 德州仪器IncorporatedProduct文件夹链接:LM259图2显示了计时器2自动计数 whenDCEN = 0。在此模式下,bitEXEN2在T2CON中选择两个选项。如果EXEN2 = 0,计时器2计数到0ffh,然后在溢出时设置TF2位。溢出还会导致计时器寄存器被重 新加载,其中包含RCAP2H和RCAP2L中的16位值。捕获ModeRCAP2H和RCAP2L中 的inTimer的值是由软件预先设lm2596定的。如果EXEN2 = 1,那么16位的重载可以 通过溢出或在externalinput T2EX中通过1到0的转换触发。这个转换还设置了EXF2 位。tf2和EXF2位都可以在启用时生成中断。设置DCEN位使定时器2可以向上或向下 计数,如图3所示。在这种模式下,T2EX pin控制了计数的方向。T2EX的逻辑1使计 时器2计数。计时器将在0ffh溢出并设置tf2位。这种溢出还会导致16位值inRCAP2H 和RCAP2L分别被重新加载lm2596到计时器寄存器TH2和TL2中。T2EX的逻辑0使定 时器2倒数。当TH2和TL2等于存储在inRCAP2H和RCAP2L中的值 时,timerunderflows。下流设置TF2位并将0ffh重新加载到计时器寄存器中。EXF2位 可在计时器2溢出或溢出时切换,可lm2596以用作第17位的分辨率。在此操作模式 中,EXF2不标记中断
交直流两用型LM2596稳压模块产品使用手册
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LM2596稳压模块产品使用手册
【简要说明】
一、尺寸:长72mmX宽40mmX高18mm
二、主要芯片:整流桥、LM2596
三、工作电压:输入电压小于42V,输出电压 5V 另有12V,3.3V可选。
四、特点:1、具有输出电压指示灯。
2、最大输出电流3A。
3、采用螺旋压接端子。
4、强大的滤波电路。
5、输出转换效率高。
6、固定频率振荡器(150KHZ)
7、具有完善的保护电路:电流限制、热关断电路等
8、只需极少的外围器件
9、转换效率75%~88%
10、工作温度范围-40℃~+125℃
11、工作湿度 40% ~ 80%RH
12、输出电压的误差可以保证在±4%的范围内。
LM2596芯片说明:
【标注说明】
【功能描述】
【原理图】
【PCB图】
【元件清单】
【应用举例1】
【应用举例2】
【图片展示】。
LM2596构成的可调限流稳压器
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LM2596构成的可调限流稳压器
LM2596简介
LM2596系列稳压芯片,是德州仪器(TI)生产的3A降压开关型稳压芯片。
LM2596性能特点:
•内含固定频率振荡器(150KHZ)和基准稳压器(1.23v)
•具有完善的保护电路、电流限制、热关断电路等
•仅需极少的外围器件便可构成高效稳压电路
•提供3.3V、5V、12V及可调(-ADJ)等多个电压档次
LM2596构成的可调限流稳压器
LM2596的常规应用,不具备电流限制功能,在一些电子设计和辅助设备上,对限流功能有一定的需求,虽然厂家给出的标准应用电路无法完成这一功能,我们可以通过适当的添加功能电路,让它实现限流功能。
如下图:
LM2596构成的可调限流稳压器
上图的功能网友已经验证过,出于严谨,小编在此不做工作原理的分析,‘机电匠’有机会对电路功能做验证实验的时候,再通过视频文章向大家呈现。
lm2596中文资料
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lm2596中文资料1. 概述lm2596是一款高效率开关电源稳压器芯片,广泛应用于电子设备中对直流电压进行稳定调整的场合。
本文档将详细介绍lm2596的特性、工作原理、应用场景以及使用注意事项。
2. 特性•宽输入电压范围:4V-40V•可调输出电压范围:1.23V-37V•高效率:可达到92%•最大输出电流:3A•过热保护功能3. 工作原理lm2596采用了开关稳压器的工作原理,通过周期性地开关和断开电流流通路径,将输入电压转换为稳定的输出电压。
其主要原理如下:1.输入电压通过电感和开关管传导到输出端,同时电容储存能量。
2.控制器检测输出电压,如果低于设定值,则控制开关管开启,使电流通过电感传输到输出端,提供稳定的输出电压。
3.如果输出电压高于设定值,则控制开关管关闭,切断电流流动。
这种周期性的开关和断开电路,可以通过控制开关管的开启时间和关闭时间,来调整输出电压的稳定性和精确度。
4. 应用场景lm2596广泛应用于各种需要稳定直流电压的场合,以下是lm2596常见的应用场景:4.1 电子设备稳压电源lm2596可以根据需要调整输出电压,可以在电子设备中作为稳压电源芯片使用。
它可以将输入电压调整为稳定的输出电压,以供电子设备正常运行。
4.2 LED照明由于lm2596具有高效率和可调输出电压的特性,非常适合用于LED照明应用。
lm2596可以将输入电压调整为适合LED灯的电压,提供稳定的电源以驱动LED照明。
4.3 高频电源lm2596的高效率和宽输入电压范围,使其非常适合用于高频电源应用。
lm2596可以将输入电压转换为稳定的高频输出,满足高频电源的需求。
5. 使用注意事项在使用lm2596时,请注意以下事项:1.输入电压不要超过40V,否则可能导致芯片过载损坏。
2.充分考虑散热问题,尽量避免芯片过热,建议在芯片周围预留散热空间。
3.在使用lm2596时,应按照芯片的使用说明进行正确的电路设计和连接。
LM2596R-5.0中文资料
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元器件交易网3.0A, 150Khz, Step-Down Switching RegulatorFEATURES3.3V, 5.0V, 12V, 15V, and Adjustable Output Versions Adjustable Version Output Voltage Range, 1.23 to 37V +/- 4%. Maximum Over Line and Load Conditions Guaranteed 3.0A Output Current Wide Input Voltage Range Requires Only 4 External Components 150Khz Fixed Frequency Internal Oscillator TTL Shutdown Capability, Low Power Standby Mode High Efficiency Uses Readily Available Standard Inductors Thermal Shutdown and Current Limit Protection Moisture Sensitivity Level(MSL) Equals1 TO-263(D2) TO-220V TO-220LM2596ApplicationsSimple High-Efficiency Step-Down(Buck) Regulator Efficient Pre-Regulator for Linear Regulators On-Card Switching Regulators Positive to Negative Converter(Buck-Boost) Negative Step-Up Converters Power Supply for Battery Chargers1. 2. 3. 4. 5. Vin Output Ground Feedback On/OffDESCRIPTIONThe LM2596 series of regulators are monolithic integrated circuits ideally suited for easy and convenient design of a step-down switching regualtor(buck converter). All circuits of this series are capable of driving a 3.0A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5.0V,12V, 15V, and an adjustable output version.ORDERING INFORMATIONDevice LM2596T-X.X LM2596TV-X.X LM2596R Marking LM2596T-X.X LM2596T-X.X LM2596R-X.X Package TO-220 TO-220V TO-263These regulatiors were designed to minimize the number of externalcomponents to simplify the power supply design. Standard series of inductors optimized for use with the LM2576 are offered by several different inductor manufacturers. Since the LM2596 converter is a switch-mode power supply, its efficiency is significantly higher in comparison with popular three-terminal limear reguators, especially with higher input voltages. In many cases, the power dissipated is so low that no heatsink is required or its size could be reduced dramatically. A standard series of inductors optimized for use with the LM2596 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies. The LM2596 features include a guaranteed +/- 4% tolerance on output voltage within specified input voltages and output load conditions, and +/-15% on the oscillator frequency (+/- 2% over 0oC to 125 oC). External shutdown is included, featuring 80 uA(typical) standby current. The output switch includes cycle-bycycle current limiting, as well as thermal shutdown for full protection under fault conditions.HTC1Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorTypical Application (Fixed Output Voltage Versions)LM2596LM2596-5.033 uH680 uF1N5824220 uFFigure 1. Block Diagram and Typical ApplicationABSOLUTE MAXIMUM RATINGS(Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.)Power DissipationTO-220, 5-LeadThermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-caseTO-263Thermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-caseHTC2Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorLM2596OPERATING RATINGS (Operating Ratings indicate conditions for which the device is intended to befunctional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.)ELECTRICAL CHARACTERISTICS / SYSTEM PARAMETERS ([Note 1] Test Circuit Figure 2) (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. For typical values TJ = 25°C, for min/max values TJ is the operating junction temperature range that applies [Note 2], unless otherwise noted.)LM2596-3.3 ([ Note 1]. Test Circuit Figure 2 )73 LM2596-5.0 ([ Note 1]. Test Circuit Figure 2 ) 180 LM2596-12 ([ Note 1]. Test Circuit Figure 2 )90 LM2596-15 ([ Note 1]. Test Circuit Figure 2 )98 LM2596-ADJ ([ Note 1]. Test Circuit Figure 2 )73HTC3Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorELECTRICAL CHARACTERISTICS / Device ParametersLM2596(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. For typical values Tj = 25°C, for min/max values Tj is the operating junction temperature range that applies [Note 2], unless otherwise noted.)10 0 127 110 15050 100 173 1731.16 01.4 1.53.6 3.4100 4.5 6.9 7.5 50 30 1002 5 00 2 0 2.0 2.0 2 V LOGIC = 2.5V (Regulator OFF) V LOGIC = 0.5V (Regulator ON) 5 0.02 1.3 1.32500.6 0.6 15 5.001. External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the LM2596 is used as shown in the Figure 1 test circuit, system performance will be as shown in system parameters section . 2. Tested junction temperature range for the LM2596 : TLOW = –0°C THIGH = +125°C 3. The oscillator frequency reduces to approximately 18 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 dissipation of the IC by lowering the minimum duty cycle from 5% down to approximately 2%. 4. Output (Pin 2) sourcing current. No diode, inductor or capacitor connected to output pin. 5. Feedback (Pin 4) removed from output and connected to 0 V. 6. Feedback (Pin 4) removed from output and connected to +12 V for the Adjustable, 3.3 V, and 5.0V ersions, and +25 V for the 12 V and15 V versions, to force the output transistor “off”. 7. Vin = 40 V.HTC4Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorTYPICAL PERFORMANCE CHARACTERISTICS (Circuit of Figure 2)LM2596HTC5Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorTYPICAL PERFORMANCE CHARACTERISTICS (Circuit of Figure 2)Feedback Pin Bias CurrentLM2596HTC6Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorTest Circuit and Layout GuidelinesLM2596Figure 2. Typical Test Circuits and Layout GuideAs in any switching regulator, layout is very important. Rapidly switching currents associated with wiring inductance can generate voltage transients which can cause problems. For minimal inductance and ground loops, the wires indicated by heavy lines should be wide printed circuit traces and should be kept as short as possible. For best results, external components should be located as close to the switcher lC as possible using ground plane construction or single point grounding. If open core inductors are used, special care must be taken as to the location and positioning of this type of inductor. Allowing the inductor flux to intersect sensitive feedback, lC groundpath and COUT wiring can cause problems. When using the adjustable version, special care must be taken as to the location of the feedback resistors and the associated wiring. Physically locate both resistors near the IC, and route the wiring away from the inductor, especially an open core type of inductor.HTC7Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorLM2596PIN FUNCTION DESCRIPTION Symbol 1VinDescription This pin is the positive input supply for the LM2596 step–down switching23 45regulator.In order to minimize voltage transients and to supply the switching currents needed by the regulator, a suitable input bypass capacitor must be present .(Cin in Figure 1). Output This is the emitter of the internal switch. The saturation voltage Vsat of this output switch is typically 1.5 V. It should be kept in mind that the PCB area connected to this pin should be kept to a minimum in order to minimize coupling to sensitive circuitry. Circuit ground pin. See the information about the printed circuit board layout. Gnd Feedback This pin senses regulated output voltage to complete the feedback loop. The signal is divided by the internal resistor divider network R2, R1 and applied to the non–inverting input of the internal error amplifier. In the Adjustable version of the LM2596 switching regulator this pin is the direct input of the error amplifier and the resistor network R2, R1 is connected externally to allow programming of the output voltage. ON/OFF It allows the switching regulator circuit to be shut down using logic level signals, thus dropping the total input supply current to approximately 80 mA. The threshold voltage is typically 1.4 V. Applying a voltage above this value (up to +Vin) shuts the regulator off. If the voltage applied to this pin is lower than 1.4V or if this pin is left open, the regulator will be in the "on" conditionHTC8Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorLM2596PACKAGES DIMENSION : TO220-5LHTC9Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorPACKAGES DIMENSION : TO220V-5LLM2596HTC10Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorLM2596PACKAGES DIMENSION : TO263-5LHTC11Oct 2004 - Rev 0。
中文资料 LM2596电源降压调整器
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LM2596电源降压调整器(150KHz,3A)英文文章名:LM2596 SIMPLE SWITCHER® Power Converter 150 kHz3A Step-Down Voltage Regulator文章出处:版本号:DS012583 日期:2002年5月摘录人:黄明强摘录日期:2007年5月3日是否好买估计:生产中心正在使用价格:概述:LM2596系列开关电压调节器是降压型电源管理单片集成电路,能够输出3A的驱动电流,同时具有很好的线性和负载调节特性。
固定输出版本有3.3V、5V、12V,还有一个输出可调版本。
添加少量的外部元件就可以使用该电压调节器。
该器件内部集成有频率补偿和固定频率发生器。
开关频率为150KHz,与低频开关调节器相比较,可以使用更小规格的滤波元件。
其封装形式包括标准的5脚TO-220封装和5脚TO-263表贴封装。
由于该器件可以使用通用的标准电感,这更优化了LM2596的使用,极大地简化了开关电源电路的设计。
该器件还有其他一些特点:在特定的输入电压和输出负载的条件下,输出电压的误差可以保证在±4%的范围内,振荡频率误差在±15%的范围内;可以用仅80μA的待机电流,实现外部断电;具有自我保护电路(一个两级降频限流保护和一个在异常情况下断电的过温完全保护电路)。
特征:※ 3.3V、5V、12V的固定电压输出和可调电压输出※可调输出电压范围1.2V~37V,±4%※封装形式:TO-220(T)和TO-263(S)※保证输出负载电流3A※输入电压可高达40V※仅需4个外接元件※很好的线性和负载调节特性※150KHz固定频率的内部振荡器※TTL关断能力※低功耗待机模式,I Q的典型值为80μA※高转换效率※使用容易购买的标准电感※具有过热保护和限流保护功能应用:※简易高效率降压调节器※在卡上的开关电压调节器※正到负电压转换器专利号:5382918典型电路(固定输出电压版本):封装和型号:※弯曲交叉的引脚,通孔封装,5脚TO-220 (T)订货型号:LM2596T-3.3, LM2596T-5.0,LM2596T-12 or LM2596T-ADJ ※表面贴封装,5脚TO-263 (S)订货型号:LM2596S-3.3, LM2596S-5.0, LM2596S-12 or LM2596S-ADJ 极限条件:最大供电电压45VON /OFF 管脚输入电压-0.3≤V≤+25V反馈脚电压-0.3≤V≤+25V输出电压到地(稳态)-1V功率消耗内部限定储存温度-65°C 到+150°CESD易感性(人体模式)2KV焊接温度T封装(锡焊, 10秒) +260°C最大结温+150°C运行条件:温度范围-40°C≤T J≤+125°C供电电压 4.5V 到40VLM2596-3.3电参数说明:标准字体对应的项目适合于TJ=25℃时,粗体字对应的项目适合于全温度范围LM2596-5.0电参数说明:标准字体对应的项目适合于TJ=25℃时,粗体字对应的项目适合于全温度范围LM2596-12电参数所有输出电压版本电参数说明:标准字体对应的项目适合于TJ=25℃时,带下划线的粗斜体字对应的项目适合于整个温度范围。
lm2596-3.3 LM2596-ADJ LM2596-12 LV2596-3.3 中文资料
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2.0
V(min)
5
μA
15
μA(max)
0.02
μA
5
μA(max)
注 2: 典型值是指在 25℃下的数值,代表最常见的情况。 注 3: 所有的极限参数都必须适合于室温(用正常字体表示)和极限温度(用带下划线的粗斜体字表示),所有室
温下的极限参数都是经过测试得出的,所有的极限温度下的极限参数都可以通过使用相关的标准静态质量控 制方法来加以保证。 注 4:二极管、电感、输入和输出端的电容以及调节输出电压的电阻等外接元件可能会影响开关调节器的系统性 能。当 LM2596 用在如图 1 所示测试电路中时,其系统性能如电气特性中系统参量所示。 注 5:当第二级电流极限功能启动时,开关频率会有所下降, 下降的程度取决于过电流的严重程度。 注 6:输出管脚不连接电感、电容或二极管。 注 7:把反馈管脚和输出管脚断开,把反馈管脚连到 0V,以强制输出开关晶体管导通。 注 8:把反馈管脚和输出管脚断开,把反馈管脚连到 12V(当 VOUT=3.3V、5V 或 ADJ 时)或 15V(当 VOUT=12V 时), 以强制输出开关晶体管截止。 注 9:VIN=40V 注 10:环境热阻(不外加散热片)是指 TO-220 封装的 LM2596 垂直焊接在覆盖有面积约为 1 平方英寸铜箔的 PCB 上所对应的值。 注 11:TO-263 封装的 LM2596 垂直焊接在覆盖有面积约为 0.5 平方英寸铜箔的单面 PCB 上所对应的环境热阻。 注 12:TO-263 封装的 LM2596 垂直焊接在覆盖有面积约为 2.5 平方英寸铜箔的单面 PCB 上所对应的环境热阻。 注 13:TO-263 封装的 LM2596 垂直焊接在覆盖有面积约为 3 平方英寸铜箔的双面 PCB 上所对应的环境热阻,而 PCB 的另一面覆盖有面积约为 16 平方英寸铜箔。 注14: LM2596T-3.3, LM2596T-5.0, LM2596T-12, LM2596T-ADJ为TO-220封装(DIP); LM2596S-3.3, LM2596S-5.0,LM2596S-12, LM2596S-ADJ为TO-263封装(SMT)。
LM2596芯片资料
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150kHz, 3A PWM Buck DC/DC ConverterLM2596-XXE5/F5DescriptionThe LM2596-XXE5/F5 series of regulators are monolithic ICs that provide all active functions for a step-down (buck switching regulator, capable of driving 3A load with excellent line and load regulation. These devices are available in fixed output voltage of 3.3V, 5V, 12V 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 LM2596-XXE5/F5 series operates at a switching frequency of 150kHz, thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Available in standard 5-lead TO-220 and TO-263 packages with several different lead bend options. A standard series of inductors are available from several different manufacturers optimized for use with the LM2596-XXE5/F5 series. This feature greatly simplifies the design of switch-mode power supplies. Other features include a guaranteed ±4% tolerance on output voltage under specified input voltage and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring 80μA standby current. Self protection features include a two stage frequency reducing current limit for the output switch and an over temperature shutdown for complete protection under fault conditions.Features●3.3V, 5V, 12V, and adjustable output versions● Adjustable version output voltage range, 1.3V to 37V±4% max over line and load conditions● 150kHz±15% fixed switching frequency● TTL shutdown capability● Operating voltage can be up to 40V● Output load current:3A● TO220-5L and TO263-5L packages● Low power standby mode.● Thermal shutdown and current limit protection.● High efficiency● Built-in switching transistor on chip● Requires only 4 external components● Use readily available standard inductorsApplications● Simple high-efficiency step-down (buck regulator.● Positive to negative co nverter (Buck-Boost.● On-card switching regulators.Pin AssignmentBlock DiagramOrdering InformationAbsolute Maximum Ratings (Note 1Parameter Symbol Value UnitSupply V oltage V CC 45 V On/Off Pin Input V oltage V SD -0.3 ~ +25 V Feedback Pin V oltage V FB -0.3 ~ +25 V Output V oltage to Ground V OUT -1 V Power Dissipation P D Internally Limited W Operating Temperature Topr -40 ~ +125 ℃Storage Temperature Tstg -65 ~ +150 ℃ Operating V oltage V OP +4.5 ~ +40 VESD Susceptibility (Note 2 2000 VElectrical Characteristics (All Output Voltage VersionsSpecifications with boldface type are for full operating temperature range, the other type are for T J =25°C.(Unless otherwise specified, V IN =12V for the 3.3V , 5V , and adjustable version and V IN =24V for the 12V version, I LOAD =500mAParameter Symbol Test Condition Min Typ Max UnitDevice parameters50Feedback Bias CurrentIbAdjustable Version Only, V FB = 1.3V- 10 100nA127 173Oscillator Frequency f O (Note 6110 150 173KHz 1.4Saturation V oltage V SAT I OUT =3A (Note 7, 8 - 1.16 1.5 V Max Duty Cycle (ON100 Min Duty Cycle(OFF DC (Note 8(Note 9 - 0- % 3.6 6.9Current LimitI CL Peak Current ( Note 7, 83.44.5 7.5A Output=0V (Note 7, 9 - - 50 μA Output Leakage Current I LOutput=-1V (Note 10 - 2 30 mA Quiescent Current I Q (Note 9 - 5 10 mA200Standby Quiescent CurrentI STBY ON/OFF pin=5V (Note 10 - 80 250μATO-220-5L - 2 - θJC TO-263-5L Junction to Case- 3.5 - /W℃TO-220-5L- 50 - Thermal Resistance θJA (Note11 TO-263-5L Junction to Ambient - 23 -/W ℃ON/OFF ControlV IH Low (Regulator ON - 0.6 ON/OFF Pin Logic Input Threshold Voltage V IL High (Regulator OFF2.0 1.3 - V I IH V LOGIC =2.5V (Regulator OFF - 5 15 ON/OFF Pin Input CurrentI ILV LOGIC =0.5V (Regulator ON-0.025μAElectrical Characteristics (ContinuedSpecifications with boldface type are for full operating temperature range, the other type are for T J=25°C.Part No. Parameter Symbol Conditions Min Typ(Note 3Max (Note 4UnitsOutput V oltage V OUT 4.75V≤V IN≤40V, 0.2A≤I LOAD≤3A 3.1683.1353.33.4323.465VLM2596-3.3Efficiency ηV IN=12V, I LOAD=3A - 73 - %Output V oltage V OUT7V≤V IN≤40V, 0.2A≤I LOAD≤3A 4.8004.7505.05.2005.250VLM2596-5.0Efficiency ηV IN=12V, I LOAD=3A - 80 - %Output V oltage V OUT15V≤V IN≤40V, 0.2A≤I LOAD≤3A 11.5211.4012.012.4812.60VLM2596-12Efficiency ηV IN=25V, I LOAD=3A - 90 - %Output Feedback V FB4.5V≤V IN≤40V, 0.2A≤I LOAD≤3AV OUT programmed for 3V1.1801.1681.2301.2801.292VLM2596-ADJEfficiency ηV IN=12V, V OUT=3V, I LOAD=3A - 77 - % Note 1 :Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. Forguaranteed specifications and test conditions, see the Electrical Characteristics.Note 2 : The human body model is a 100pF capacitor discharged through a 1.5K resistor into each pin.Note 3 : Typical numbers are at 25℃ and represent the most likely norm.Note 4 : All limits guaranteed at room temperature (standard face type and at temperature extremes(bold face type. All room temperature limits are 100% production tested. All limits at temperature extremes are guaranteed via correlation usingstandard Statistical Quality Control (SQC methods. All limits are used to calculate Average Outgoing Quality Level(AOQL.Note 5 : External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect switching regulator system performance.Note 6 : The switching frequency is reduced when the second stage current limit is activated.Note 7 : No diode, inductor or capacitor connected to output pin.Note 8 : Feedback pin removed from output and connected to 0V to force the output transistor switch ON.Note 9 : Feedback pin removed from output and connected to +12V for the 3.3V, 5V and adjustable version, and +15V for the 12V version, to force the output transistor switch OFF.Note 10 : V IN=40V.Note 11 : Junction to Ambient thermal resistance. (With copper area of approximately 3 in²Typical Performance Characteristics (circuit of Figure 2Typical Performance Characteristics(Cont.Typical Performance Characteristics(Cont.Typical Performance Characteristics(Cont.Typical Application CircuitTO-263-5L DimensionInches Millimeters Inches Millimeters LM2596□□□ □□□□Date CodeDIMMin. Max. Min. Max. DIMMin. Max. Min. Max.A 0.173 0.189 4.40 4.80 L5 0.244 0.260 6.20 6.60 b 0.030 0.039 0.76 1.00 c1 0.0490.057 1.25 1.45 c 0.014 0.020 0.36 0.50 L 0.522 0.561 13.25 14.25 D 0.339 0.354 8.60 9.00 e 0.067 REF 1.70 REF E 0.386 0.409 9.80 10.4 L1 0.102 0.114 2.60 2.89 L4 0.579 0.602 14.7 15.3 φ 0.146 0.156 3.71 3.96Notes: 1.Controlling dimension: millimeter2.Maximum lead thickness includes lead finish thickness, and minimum lead thickness is the minimum thickness of base material.3.If there is any question with packing specification or packing method, please contact your local CYStek sales office.Material:• Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0CYStech Electronics Corp. TO-263-5L Dimension Spec. No. : C548F5 Issued Date : 2007.12.11 Revised Date : Page No. : 11/12 Marking: LM2596□□□ Date Code □□□□ Vout: 3.3V→-33 5.0V→-50 12V→-12 ADJ→ blank Style: Pin 1.Vin 2.Vout 3.GND4.Feedback5.ON/OFF 5-Lead TO-263-5L Plastic Package CYStek Package Code: F5 DIM A b L4 c L1 E Inches Min. Max. 0.173 0.189 0.026 0.036 0.000 0.012 0.014 0.020 0.090 0.110 0.386 0.409 Millimeters Min. Max. 4.40 4.80 0.66 0.91 0.00 0.30 0.36 0.50 2.29 2.79 9.80 10.4 DIM c2 L2 D e L θ Inches Min. Max. 0.049 0.057 0.050 REF 0.3390.354 0.067 REF 0.575 0.622 0° 8° Millimeters Min. Max. 1.25 1.45 1.27 REF 8.60 9.001.70 REF 14.6 15.8 0° 8° Notes: 1.Controlling dimension :millimeter2.Maximum lead thickness includes lead finish thickness, and minimum lead thickness is the minimum thickness of base material.3.If there is any question with packing specification or packing method, please contact your loca l CYStek sales office. Material: • Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0 Recommended wave soldering condition Product Pb-free devices LM2596-XXE5/F5Peak Temperature 260 +0/-5 °C Soldering Time 5 +1/-1 seconds CYStek Product SpecificationCYStech Electronics Corp. Recommended temperature profile for IR reflow Spec. No. : C548F5 Issued Date : 2007.12.11 Revised Date : Page No. : 12/12 Profile feature Average ramp-up rate (Tsmax to Tp Preheat −Temperature Min(TS min −Te mperature Max(TS max −Time(ts min to ts max Time maintained above: −Temperature (TL − Time (tL Peak Temperature(TP Time within 5°C of actual peak temperature(tp Ramp down rate Time 25 °C to peak temperature Sn-Pb eutectic Assembly 3°C/second max. 100°C 150°C 60-120 seconds 183°C 60-150 seconds 240 +0/-5 °C 10-30 seconds 6°C/second max. 6 minutes max. Pb-free Assembly 3°C/second max. 150°C 200°C 60-180 seconds 217°C 60-150 seconds 260 +0/-5 °C 20-40 seconds 6°C/second max. 8 minutes max. Note : All temperatures refer to topside of the package, measured on the package body surface. Important Notice: • All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of CYStek. • CYStek reserves the right to make changes to its products without notice. • CYStek semiconductor products are not warranted to be suitable for use in Life-Support Applications, or systems. • CYStek assumes no liability for any consequence of customer product design, infringement of patents, or application assistance. LM2596-XXE5/F5 CYStek Product Specification。
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元器件交易网3.0A, 150Khz, Step-Down Switching RegulatorFEATURES3.3V, 5.0V, 12V, 15V, and Adjustable Output Versions Adjustable Version Output Voltage Range, 1.23 to 37V +/- 4%. Maximum Over Line and Load Conditions Guaranteed 3.0A Output Current Wide Input Voltage Range Requires Only 4 External Components 150Khz Fixed Frequency Internal Oscillator TTL Shutdown Capability, Low Power Standby Mode High Efficiency Uses Readily Available Standard Inductors Thermal Shutdown and Current Limit Protection Moisture Sensitivity Level(MSL) Equals1 TO-263(D2) TO-220V TO-220LM2596ApplicationsSimple High-Efficiency Step-Down(Buck) Regulator Efficient Pre-Regulator for Linear Regulators On-Card Switching Regulators Positive to Negative Converter(Buck-Boost) Negative Step-Up Converters Power Supply for Battery Chargers1. 2. 3. 4. 5. Vin Output Ground Feedback On/OffDESCRIPTIONThe LM2596 series of regulators are monolithic integrated circuits ideally suited for easy and convenient design of a step-down switching regualtor(buck converter). All circuits of this series are capable of driving a 3.0A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5.0V,12V, 15V, and an adjustable output version.ORDERING INFORMATIONDevice LM2596T-X.X LM2596TV-X.X LM2596R Marking LM2596T-X.X LM2596T-X.X LM2596R-X.X Package TO-220 TO-220V TO-263These regulatiors were designed to minimize the number of externalcomponents to simplify the power supply design. Standard series of inductors optimized for use with the LM2576 are offered by several different inductor manufacturers. Since the LM2596 converter is a switch-mode power supply, its efficiency is significantly higher in comparison with popular three-terminal limear reguators, especially with higher input voltages. In many cases, the power dissipated is so low that no heatsink is required or its size could be reduced dramatically. A standard series of inductors optimized for use with the LM2596 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies. The LM2596 features include a guaranteed +/- 4% tolerance on output voltage within specified input voltages and output load conditions, and +/-15% on the oscillator frequency (+/- 2% over 0oC to 125 oC). External shutdown is included, featuring 80 uA(typical) standby current. The output switch includes cycle-bycycle current limiting, as well as thermal shutdown for full protection under fault conditions.HTC1Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorTypical Application (Fixed Output Voltage Versions)LM2596LM2596-5.033 uH680 uF1N5824220 uFFigure 1. Block Diagram and Typical ApplicationABSOLUTE MAXIMUM RATINGS(Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.)Power DissipationTO-220, 5-LeadThermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-caseTO-263Thermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-caseHTC2Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorLM2596OPERATING RATINGS (Operating Ratings indicate conditions for which the device is intended to befunctional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.)ELECTRICAL CHARACTERISTICS / SYSTEM PARAMETERS ([Note 1] Test Circuit Figure 2) (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. For typical values TJ = 25°C, for min/max values TJ is the operating junction temperature range that applies [Note 2], unless otherwise noted.)LM2596-3.3 ([ Note 1]. Test Circuit Figure 2 )73 LM2596-5.0 ([ Note 1]. Test Circuit Figure 2 ) 180 LM2596-12 ([ Note 1]. Test Circuit Figure 2 )90 LM2596-15 ([ Note 1]. Test Circuit Figure 2 )98 LM2596-ADJ ([ Note 1]. Test Circuit Figure 2 )73HTC3Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorELECTRICAL CHARACTERISTICS / Device ParametersLM2596(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. For typical values Tj = 25°C, for min/max values Tj is the operating junction temperature range that applies [Note 2], unless otherwise noted.)10 0 127 110 15050 100 173 1731.16 01.4 1.53.6 3.4100 4.5 6.9 7.5 50 30 1002 5 00 2 0 2.0 2.0 2 V LOGIC = 2.5V (Regulator OFF) V LOGIC = 0.5V (Regulator ON) 5 0.02 1.3 1.32500.6 0.6 15 5.001. External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the LM2596 is used as shown in the Figure 1 test circuit, system performance will be as shown in system parameters section . 2. Tested junction temperature range for the LM2596 : TLOW = –0°C THIGH = +125°C 3. The oscillator frequency reduces to approximately 18 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 dissipation of the IC by lowering the minimum duty cycle from 5% down to approximately 2%. 4. Output (Pin 2) sourcing current. No diode, inductor or capacitor connected to output pin. 5. Feedback (Pin 4) removed from output and connected to 0 V. 6. Feedback (Pin 4) removed from output and connected to +12 V for the Adjustable, 3.3 V, and 5.0V ersions, and +25 V for the 12 V and15 V versions, to force the output transistor “off”. 7. Vin = 40 V.HTC4Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorTYPICAL PERFORMANCE CHARACTERISTICS (Circuit of Figure 2)LM2596HTC5Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorTYPICAL PERFORMANCE CHARACTERISTICS (Circuit of Figure 2)Feedback Pin Bias CurrentLM2596HTC6Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorTest Circuit and Layout GuidelinesLM2596Figure 2. Typical Test Circuits and Layout GuideAs in any switching regulator, layout is very important. Rapidly switching currents associated with wiring inductance can generate voltage transients which can cause problems. For minimal inductance and ground loops, the wires indicated by heavy lines should be wide printed circuit traces and should be kept as short as possible. For best results, external components should be located as close to the switcher lC as possible using ground plane construction or single point grounding. If open core inductors are used, special care must be taken as to the location and positioning of this type of inductor. Allowing the inductor flux to intersect sensitive feedback, lC groundpath and COUT wiring can cause problems. When using the adjustable version, special care must be taken as to the location of the feedback resistors and the associated wiring. Physically locate both resistors near the IC, and route the wiring away from the inductor, especially an open core type of inductor.HTC7Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorLM2596PIN FUNCTION DESCRIPTION Symbol 1VinDescription This pin is the positive input supply for the LM2596 step–down switching23 45regulator.In order to minimize voltage transients and to supply the switching currents needed by the regulator, a suitable input bypass capacitor must be present .(Cin in Figure 1). Output This is the emitter of the internal switch. The saturation voltage Vsat of this output switch is typically 1.5 V. It should be kept in mind that the PCB area connected to this pin should be kept to a minimum in order to minimize coupling to sensitive circuitry. Circuit ground pin. See the information about the printed circuit board layout. Gnd Feedback This pin senses regulated output voltage to complete the feedback loop. The signal is divided by the internal resistor divider network R2, R1 and applied to the non–inverting input of the internal error amplifier. In the Adjustable version of the LM2596 switching regulator this pin is the direct input of the error amplifier and the resistor network R2, R1 is connected externally to allow programming of the output voltage. ON/OFF It allows the switching regulator circuit to be shut down using logic level signals, thus dropping the total input supply current to approximately 80 mA. The threshold voltage is typically 1.4 V. Applying a voltage above this value (up to +Vin) shuts the regulator off. If the voltage applied to this pin is lower than 1.4V or if this pin is left open, the regulator will be in the "on" conditionHTC8Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorLM2596PACKAGES DIMENSION : TO220-5LHTC9Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorPACKAGES DIMENSION : TO220V-5LLM2596HTC10Oct 2004 - Rev 0元器件交易网3.0A, 15V, Step-Down Switching RegulatorLM2596PACKAGES DIMENSION : TO263-5LHTC11Oct 2004 - Rev 0。