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LM9070M PDF预览

LM9070M

更新时间: 2024-11-22 22:31:11
品牌 Logo 应用领域
美国国家半导体 - NSC 调节器光电二极管输出元件
页数 文件大小 规格书
13页 295K
描述
Low-Dropout System Voltage Regulator with Keep-Alive ON/OFF Control

LM9070M 数据手册

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December 1999  
LM9070  
Low-Dropout System Voltage Regulator with Keep-Alive  
ON/OFF Control  
General Description  
Features  
n Automotive application reliability  
The LM9070 is a 5V, 3% accurate, 250 mA low-dropout volt-  
age regulator. The regulator features an active low delayed  
reset output flag which can be used to reset a microproces-  
sor system on turn-ON and in the event that the regulator  
output falls out of regulation for any reason. An external ca-  
pacitor programs a delay time interval before the reset out-  
put can return high.  
n 3% output voltage tolerance  
n Insensitive to radiated RFI  
n Dropout voltage less than 800 mV with 250 mA output  
current  
n Externally programmed reset delay interval  
n Keep-alive feature with 2 logic control inputs  
n 60V Load dump transient protection  
n Thermal shutdown  
Designed for automotive application the LM9070 contains a  
variety of protection features such as reverse battery,  
over-voltage shutdown, thermal shutdown, input transient  
protection and a wide operating temperature range.  
n Short circuit protection and disable safety features  
n Reverse battery protection  
A unique two-input logic control scheme is used to enable or  
disable the regulator output. An ON/OFF input can be pro-  
vided by an ignition switch derived signal while a second,  
Keep-Alive input, is generated by a system controller. This  
allows for a system to remain ON after ignition has been  
switched OFF. The system controller can then execute a  
power-down routine and after which command the regulator  
OFF to a low quiescent current state (60 µA max).  
n Low OFF quiescent current, 50 µA maximum  
n Wide operating temperature range −40˚C to +125˚C  
n TO-263 and 20-pin power surface mount packages  
n Lead form compatible with TLE4267 TO-220 regulator  
(package TA07D)  
Design techniques have been employed to allow the regula-  
tor to remain operational and not generate false reset signals  
when subjected to high levels of RF energy (300V/m from  
2 MHz to 400 MHz).  
Connection Diagrams and Ordering Information (Top View)  
7-Lead TO-263  
20-Pin SO Package  
Surface Mount Package  
DS012831-1  
DS012831-2  
Backside metal is internally connected to ground.  
Order Number LM9070M  
See NS Package Number M20B  
Order Number LM9070S  
See NS Package Number TS7B  
© 1999 National Semiconductor Corporation  
DS012831  
www.national.com  

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