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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 79

Low cost PolyPhase DC/DC converter delivers high current

Wei Chen

Abstract

The LTC1929 and LTC1929-PG, current mode DC/DC controllers that drive two synchronous buck stages out of phase, are described.

Keywords

PolyPhase DC/DC converter

LTC1929

LTC1929-PG

Introduction

The LTC1929/LTC1929-PG are current mode DC/DC controllers that drive two synchronous buck stages out of phase. The 2-phase architecture reduces the number of input and output capacitors without increasing the switching frequency. The relatively low switching frequency and integrated high current MOSFET drivers help obtain high power conversion efficiency for low voltage, high current applications. Because of output ripple current cancellation, lower value ...

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