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LM9074

更新时间： 2024-11-22 22:47:03
品牌 Logo 应用领域
美国国家半导体 - NSC 调节器
页数 文件大小 规格书
9页 197K
描述
System Voltage Regulator with Keep-Alive ON/OFF

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LM9074 数据手册

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PRELIMINARY  
January 2000  
LM9074  
System Voltage Regulator with Keep-Alive ON/OFF  
Control  
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).  
General Description  
%
The LM9074 is a 5V, 3 accurate, 180 mA NPN voltage  
regulator. The regulator features an active low delayed reset  
output flag which can be used to reset a microprocessor sys-  
tem on turn-ON and in the event that the regulator output  
falls out of regulation for any reason. An external capacitor  
programs a delay time interval before the reset output can  
return high.  
Features  
n Automotive application reliability  
%
n 3 output voltage tolerance  
n Insensitive to radiated RFI  
n Dropout voltage less than 2.5V with 180 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  
n Short circuit protection and disable safety features  
n Reverse battery protection  
Designed for automotive application the LM9074 contains a  
variety of protection features such as reverse battery,  
over-voltage shutdown, thermal shutdown, input transient  
protection and a wide operating temperature range.  
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, 60 µA maximum  
n Wide operating temperature range −40˚C to +125˚C  
Connection Diagrams and Ordering Information (Top View)  
14-Pin SO Package  
DS101305-2  
Order Number LM9074M  
See NS Package Number M14A  
© 2000 National Semiconductor Corporation  
DS101305  
www.national.com  
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