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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 34

1.5A rail-to-rail output synchronous step-down regulator adjusts with a single resistor

Jeff Zhang

Abstract

A new regulator architecture the LTC3600 (first introduced with the LT3080 linear regulator), which has wider output range and better regulation than traditional regulators, is described.

Keywords

Buck regulator

LTC3600

Introduction

A new regulator architecture the LTC3600 (first introduced with the LT3080 linear regulator) has wider output range and better regulation than traditional regulators. Using a precision 50μA current source and a voltage follower, the output is adjustable from “0V” to close to VIN. Normally, the lowest output voltage is limited to the reference voltage. However, this new regulator has a ...

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