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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 65

High performance power solutions for AMD Opteron and Athlon 64 processors

Henry J. Zhang and Wei Chen

Abstract

High performance power solutions for AMD Opteron and Athlon 64 processors using the LTC3733 are described.

Keywords

Synchronous buck controller

AMD Opteron

Athlon 64

LTC3733

Introduction

AMD Opteron and Athlon 64 CPUs can draw 65A at very low voltages (0.8V to 1.55V). Such high currents put efficiency and related thermal issues at the top of a power supply designer’s list of problems. The new LTC3733 PolyPhase synchronous buck controller solves these problems, and others, by enabling solutions that offer high efficiency, low profile and fast transient response.

The LTC3733 is a 3-phase current mode controller that ...

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