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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 230

Ultralow quiescent current DC/DC converters for light load applications

Sam Nork

Abstract

Two ultralow quiescent current DC/DC converters for light load applications are described.

Keywords

Charge pump DC

DC converter

LTC1516

LTC1440

In lightly loaded battery applications that require regulated power supplies, the quiescent current drawn by the DC/DC converter can represent a substantial portion of the average battery current drain. In such applications, minimizing the quiescent current of the DC/DC converter becomes a primary objective because this results in longer battery life and/or an increased power budget for the rest of the circuitry. The following two circuits provide regulated step-up and step-down DC/DC conversion ...

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