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LM2596S-ADJ PDF预览

LM2596S-ADJ

更新时间： 2024-02-06 00:29:52
品牌 Logo 应用领域
德州仪器 - TI 转换器开关
页数 文件大小 规格书
33页 769K
描述
SIMPLE SWITCHER Power Converter

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LM2596S-ADJ 技术参数

是否无铅： 不含铅生命周期：Active
零件包装代码：SFM包装说明：LEAD FREE, TO-220, 5 PIN
针数：5Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：1.99其他特性：ALSO OPERATES IN ADJUSTABLE MODE FROM 1.23 TO 37 V
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：VOLTAGE-MODE
最大输入电压：40 V最小输入电压：4.5 V
标称输入电压：12 VJESD-30 代码：R-XZFM-T5
JESD-609代码：e3功能数量：1
端子数量：5最高工作温度：125 °C
最低工作温度：-40 °C最大输出电流：7.5 A
标称输出电压：5 V封装主体材料：UNSPECIFIED
封装代码：ZIP封装等效代码：ZIP5,.16,.16,67TB
封装形状：RECTANGULAR封装形式：FLANGE MOUNT
峰值回流温度（摄氏度）：NOT SPECIFIED认证状态：Not Qualified
子类别：Switching Regulator or Controllers表面贴装：NO
切换器配置：BUCK最大切换频率：180 kHz
温度等级：AUTOMOTIVE端子面层：Tin (Sn)
端子形式：THROUGH-HOLE端子节距：1.7 mm
端子位置：ZIG-ZAG处于峰值回流温度下的最长时间：NOT SPECIFIED
Base Number Matches：1

LM2596S-ADJ 数据手册

 浏览型号LM2596S-ADJ的Datasheet PDF文件第24页浏览型号LM2596S-ADJ的Datasheet PDF文件第25页浏览型号LM2596S-ADJ的Datasheet PDF文件第26页浏览型号LM2596S-ADJ的Datasheet PDF文件第28页浏览型号LM2596S-ADJ的Datasheet PDF文件第29页浏览型号LM2596S-ADJ的Datasheet PDF文件第30页 
Application Information (Continued)  
01258339  
This circuit has hysteresis  
Regulator starts switching at V = 13V  
IN  
Regulator stops switching at V = 8V  
IN  
FIGURE 24. Undervoltage Lockout with Hysteresis for Inverting Regulator  
01258340  
C
C
— 68 µF/25V Tant. Sprague 595D  
470 µF/50V Elec. Panasonic HFQ  
— 47 µF/20V Tant. Sprague 595D  
220 µF/25V Elec. Panasonic HFQ  
IN  
OUT  
FIGURE 25. Inverting −5V Regulator with Delayed Startup  
be narrowed down to just a few values. Using the values  
shown in Figure 25 will provide good results in the majority of  
inverting designs.  
This type of inverting regulator can require relatively large  
amounts of input current when starting up, even with light  
loads. Input currents as high as the LM2596 current limit  
(approx 4.5A) are needed for at least 2 ms or more, until the  
output reaches its nominal output voltage. The actual time  
depends on the output voltage and the size of the output  
capacitor. Input power sources that are current limited or  
sources that can not deliver these currents without getting  
loaded down, may not work correctly. Because of the rela-  
tively high startup currents required by the inverting topology,  
the delayed startup feature (C1, R1 and R2) shown in Figure  
25 is recommended. By delaying the regulator startup, the  
input capacitor is allowed to charge up to a higher voltage  
before the switcher begins operating. A portion of the high  
input current needed for startup is now supplied by the input  
capacitor (CIN). For severe start up conditions, the input  
capacitor can be made much larger than normal.  
01258341  
FIGURE 26. Inverting Regulator Typical Load Current  
Because of differences in the operation of the inverting  
regulator, the standard design procedure is not used to  
select the inductor value. In the majority of designs, a 33 µH,  
3.5A inductor is the best choice. Capacitor selection can also  
www.national.com  
26  
1...24252627282930...33

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