Chapter 125

Dual monolithic buck regulator provides two 1.4A outputs with 2-phase switching to reduce EMI

Jeff Witt

Abstract

A dual monolithic buck regulator that provides two 1.4A outputs with 2-phase switching to reduce EMI is described.

Keywords

Dual step-down switching regulator

LT1940

Introduction

Advanced electronic systems that use a single voltage supply are a thing of the past. Today’s electronic systems require several regulated voltages; even relatively simple subsystems need a minimum of two supplies. Microprocessors and DSPs, for example, might require both a 1.8V core supply and a 3.3V supply for I/O and memory. Many board level systems require both 3.3V and 5V. Added to this mix is the ever-increasing packaging density ...

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