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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 220

New micropower, low dropout regulators ease battery supply designs

Mitchell Lee and John Seago

Abstract

Three micropower, low dropout regulators that ease battery supply designs are described.

Keywords

Linear regulator

low dropout

LT1521

LT1175

LT1118

Three new linear regulators simplify the design of battery-operated equipment. The LT1521 is a 300mA, positive low dropout regulator with micropower quiescent current and shutdown. The LT1175 is a 500mA negative complement with adjustable current limit. A third product, the LT1118, has the unique capability of maintaining output regulation while sourcing or sinking load current.

The LT1521 contains all of the features associated with battery-operated applications. In designs ...

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