Chapter 145

Multiphase DC/DC controller pushes accuracy and bandwidth limits

Tick Houk

Abstract

The LTC3811, which is a versatile, high performance synchronous buck controller optimized for low voltage, high current supply applications, is described.

Keywords

DC/DC converter

Synchronous buck controller

LTC3811

Introduction

Speed and accuracy do not always go hand-in-hand in DC/DC converter systems—that is, until now. The LTC3811 is a dual output, fixed frequency current mode DC/DC switching regulator controller designed for one of today’s most demanding power supply applications: high current, low voltage processor core supplies.

With supply current requirements in excess of 100A and supply voltages as low as 1V, every milliohm of ...

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