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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 91

High efficiency, monolithic synchronous step-down regulator works with single or dual Li-Ion batteries

Jaime Tseng

Abstract

A high efficiency, monolithic synchronous step-down regulator, which works with single or dual Li-Ion batteries, is described.

Keywords

Step-down regulator

LTC1627

Li-Ion batteries, with their high energy density, are becoming the chemistry of choice for designers of many handheld products. In response to this growing trend, the LTC1627 incorporates features optimized for such chemistry. For instance, the LTC1627 integrates a precision undervoltage lockout circuit that shuts itself down when the supply voltage dips below 2.5V, drawing only 6μA of quiescent current. This prevents damaging a Li-Ion battery ...

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