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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 43

Dual output buck regulator with current partitioning optimizes efficiency in space-sensitive applications

Johan Strydom

Abstract

The LTC3546, a dual output current mode buck regulator with flexible output current partitioning, is described.

Keywords

Dual output buck regulator

Current partitioning

LTC3546

Introduction

The LTC3546 is a dual output current mode buck regulator with flexible output current partitioning. Beyond the advantages normally associated with dual output regulators (reduced size, cost, EMI and part count, with improved efficiency), the LTC3546’s outputs can be partitioned for either 3A and 1A outputs, or two 2A outputs. This increases its application range and simplifies multiple supply rail designs. ...

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