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1FEATURES

2? Automotive Application Reliability

? 3% Output Voltage Tolerance

? Insensitive to Radiated RFI

? Dropout Voltage Less than 800 mV with 250

mA Output Current

? Externally Programmed Reset Delay Interval

? Keep-Alive Feature with 2 Logic Control Inputs

? 60V Load Dump Transient Protection

? Thermal Shutdown

? Short Circuit Protection and Disable Safety

Features

? Reverse Battery Protection

? Low OFF Quiescent Current, 50 μA Maximum

? Wide Operating Temperature Range ?40°C to

+125°C

? TO-263 and 20-Pin Power Surface Mount

Packages

? Lead Form Compatible with TLE4267 TO-220

Regulator

DESCRIPTION

The LM9070 is a 5V, 3% accurate, 250 mA low-

dropout voltage regulator. The regulator features an

active low delayed reset output flag which can be

used to reset a microprocessor system 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.

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.

A unique two-input logic control scheme is used to

enable or disable the regulator output. An ON/OFF

input can be provided 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).

Design techniques have been employed to allow the

regulator 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).