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LT1239

Part Number	LT1239
Manufacturer	Linear Technology
Description	Backup Battery Management Circuit
Published	Mar 22, 2005
Detailed Description	LT1239 Backup Battery Management Circuit FEATURES s s s s s s s s s s s s DESCRIPTION The LT ® 1239 is a micropower ba...
Datasheet	LT1239 PDF File

Overview

LT1239 Backup Battery Management Circuit FEATURES s s s s s s s s s s s s DESCRIPTION The LT ® 1239 is a micropower backup battery management system for portable computers and instrumentation.
It contains two regulators for regulating the battery voltage and memory voltage and a comparator for switching between main power and backup power.
The first regulator provides a constant voltage charge for the backup batteries and is adjustable from 3.
75V up to 20V.
An equalization amplifier combined with the first regulator provides precision charge equalization for a 2-cell lithium-ion system.
A second regulator with 4.
85V output provides a regulated backup battery voltage to the memory when main...

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