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LP2957

更新时间： 2024-02-16 17:43:21
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德州仪器 - TI /
页数 文件大小 规格书
24页 2087K
描述
5V Low-Dropout Regulator for μP Applications

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LP2957 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Obsolete零件包装代码：SFM
包装说明：TO-220, ZIP5,.15,.2,67TB针数：3
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.82
可调性：FIXED最大回动电压 1：0.8 V
标称回动电压 1：0.8 V最大绝对输入电压：30 V
最大输入电压：30 V最小输入电压：6 V
JESD-30 代码：R-PSFM-T5JESD-609代码：e3
最大电网调整率：0.02%最大负载调整率：0.015%
湿度敏感等级：1功能数量：1
输出次数：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 1：0.25 A最大输出电压 1：5.12 V
最小输出电压 1：4.88 V标称输出电压 1：5 V
封装主体材料：PLASTIC/EPOXY封装代码：TO-220
封装等效代码：ZIP5,.15,.2,67TB封装形状：RECTANGULAR
封装形式：FLANGE MOUNT峰值回流温度（摄氏度）：260
认证状态：Not Qualified调节器类型：FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR
子类别：Other Regulators表面贴装：NO
技术：BIPOLAR端子面层：Matte Tin (Sn)
端子形式：THROUGH-HOLE端子节距：1.7 mm
端子位置：SINGLE处于峰值回流温度下的最长时间：40
最大电压容差：2.4%

LP2957 数据手册

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LP2957, LP2957A  
www.ti.com  
SNVS102C –JUNE 1998–REVISED APRIL 2013  
LP2957/LP2957A 5V Low-Dropout Regulator for µP Applications  
Check for Samples: LP2957, LP2957A  
1
FEATURES  
DESCRIPTION  
The LP2957 is a 5V micropower voltage regulator  
with electronic shutdown, error flag, very low  
quiescent current (150 µA typical at 1 mA load), and  
very low dropout voltage (470 mV typical at 250 mA  
load current).  
2
•
5V Output within 1.4% Over Temperature (A  
Grade)  
•
Easily Programmed for Snap-On/Snap-Off  
Output  
•
•
•
Ensured 250 mA Output Current  
Extremely Low Quiescent Current  
Output can be wired for snap-on/snap-off operation to  
eliminate transition voltage states where µP operation  
may be unpredictable.  
Low Input-Output Voltage Required for  
Regulation  
Output crowbar (50 mA typical pull-down current) will  
bring down the output quickly when the regulator  
snaps off or when the shutdown function is activated.  
•
•
•
•
•
Reverse Battery Protection  
Extremely Tight Line and Load Regulation  
Very Low Temperature Coefficient  
Current and Thermal Limiting  
The part has tight line and load regulation (0.04%  
typical) and low output temperature coefficient (20  
ppm/°C typical).  
Error Flag Signals when Output is out of  
Regulation  
The accuracy of the 5V output is ensured at room  
temperature and over the full operating temperature  
range.  
APPLICATIONS  
The LP2957 is available in the five-lead TO-220 and  
DDPAK/TO-263 packages.  
•
•
High-Efficiency Linear Regulator  
Battery-Powered Regulator  
Package Outline  
Top View  
Top View  
Figure 1. Bent, Staggered Leads  
5-Lead TO-220 Package  
See Package Number NDH0005D  
Figure 2. Plastic Surface Mount Package  
5-Lead DDPAK/TO-263 Package  
See Package Number KTT0005B  
Side View  
Figure 3. See Package Number KTT0005B  
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam  
during storage or handling to prevent electrostatic damage to the MOS gates.  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
2
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 1998–2013, Texas Instruments Incorporated  
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