lm9074ep National Semiconductor Corporation, lm9074ep Datasheet

lm9074ep

Manufacturer Part Number

lm9074ep

Description

Enhanced Plastic System Voltage Regulator With Keep-alive On/off Control

Manufacturer

National Semiconductor Corporation

Datasheet

1.LM9074EP.pdf (10 pages)

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LM9074EP

Enhanced Plastic System Voltage Regulator with

Keep-Alive ON/OFF Control

General Description

The LM9074EP 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

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 LM9074EP 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).

Design techniques have been employed to allow the regu-

lator 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).

ENHANCED PLASTIC

• Extended Temperature Performance of −40˚C to +125˚C

• Baseline Control - Single Fab & Assembly Site

• Process Change Notification (PCN)

• Qualification & Reliability Data

• Solder (PbSn) Lead Finish is standard

• Enhanced Diminishing Manufacturing Sources (DMS)

Ordering Information

Note 1: For the following (Enhanced Plastic) version, check for availability: LM9074MXEP. Parts listed with an "X" are provided in Tape & Reel and

parts without an "X" are in Rails.

Note 2: FOR ADDITIONAL ORDERING AND PRODUCT INFORMATION, PLEASE VISIT THE ENHANCED PLASTIC WEB SITE AT: www.national.com/

mil

Note 3: Refer to package details under Physical Dimensions

PART NUMBER

LM9074MEP

(Notes 1, 2)

Support

DS200908

VID PART NUMBER

V62/04637-01

TBD

Features

n Automotive application reliability

n 3% output voltage tolerance

n Insensitive to radiated RFI

n Dropout voltage less than 2.5V with 180mA output

n Externally programmed reset delay interval

n Keep-alive feature with 2 logic control inputs

n +40V Load dump transient protection

n Thermal shutdown

n Short circuit protection and disable safety features

n Reverse battery protection

n Low OFF quiescent current, 60µA maximum

Applications

n Selected Military Applications

n Selected Avionics Applications

current

NS PACKAGE NUMBER (Note 3)

M14A

TBD

www.national.com

May 2004

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