LM9070

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SNVS130E – DECEMBER 1999 – REVISED APRIL 2013

LM9070 Low-Dropout System Voltage Regulator with Keep-Alive ON/OFF Control

Check for Samples: LM9070

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FEATURES

DESCRIPTION

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

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Automotive Application Reliability

dropout voltage regulator. The regulator features an

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3% Output Voltage Tolerance

active low delayed reset output flag which can be

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Insensitive to Radiated RFI

used to reset a microprocessor system on turn-ON

and in the event that the regulator output falls out of

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Dropout Voltage Less than 800 mV with 250

regulation for any reason. An external capacitor

mA Output Current

programs a delay time interval before the reset output

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Externally Programmed Reset Delay Interval

can return high.

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Keep-Alive Feature with 2 Logic Control Inputs

Designed for automotive application the LM9070

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60V Load Dump Transient Protection

contains a variety of protection features such as

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Thermal Shutdown

reverse

battery,

over-voltage

shutdown,

thermal

shutdown, input transient protection and a wide

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Short Circuit Protection and Disable Safety

operating temperature range.

Features

A unique two-input logic control scheme is used to

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Reverse Battery Protection

enable or disable the regulator output. An ON/OFF

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Low OFF Quiescent Current, 50

μA Maximum

input can be provided by an ignition switch derived

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Wide Operating Temperature Range

−40°C to

signal while a second, Keep-Alive input, is generated

+125°C

by a system controller. This allows for a system to

remain ON after ignition has been switched OFF. The

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TO-263 and 20-Pin Power Surface Mount

system controller can then execute a power-down

Packages

routine and after which command the regulator OFF

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Lead Form Compatible with TLE4267 TO-220

to a low quiescent current state (60

μA max).

Regulator

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).

Connection Diagrams and Ordering Information

Backside metal is internally connected to ground.

Figure 1. 7 Lead TO-263 (Top View)

Figure 2. 20-Pin SOIC Package

Package Number KTW0007B

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PRODUCTION DATA information is current as of publication date.

Copyright © 1999–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.