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LX8942IDT

Low Dropout Dual Regulator

Microsemi Corporation 

LX8942

TM

®

Low Dropout Dual Regulator

PRODUCTION DATA SHEET

APPLICATION NOTE

The high current regulated output features fault

protection against over voltage as well as a thermal

shutdown feature. If the input voltage rises above 33V (load

dump), the high current output shuts down automatically.

The internal circuitry is thus protected and the IC is able to

survive higher voltage transients than might otherwise be

expected. The thermal shutdown of the high current output

effectively guards against overheating of the die since this

section of the IC is the principle source of power dissipation

on the chip.

ON/OFF SWITCH

The ON/OFF pin is a high impedance low current

switch that controls the main output voltage (pin 2). This is

directly compatible with all 5 volt logic families. For use

with open collector logic outputs, a 100Kresistor from this

pin to a 5V supply, such as Pin 5, is required.

Copyright © 2005

Rev. 1.2, 2006-01-20

Microsemi

Integrated Products Division

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

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