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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 143

Dual DC/DC controller for DDR power with differential VDDQ sensing and ±50mA VTT reference

Ding Li

Abstract

The LTC3876 dual DC/DC controller is described. It is a complete DDR power solution with high efficiency and high accuracy, allowing low step-down ratios while maintaining a fast, constant switching frequency over a wide input voltage range.

Keywords

LTC3876

DC/DC controller

DDR

VTT reference

Introduction

The LTC3876 is a complete DDR power solution, compatible with DDR1, DDR2, DDR3 and DDR4 lower voltage standards. The IC includes VDDQ and VTT DC/DC controllers and a precision linear VTT reference. A differential output sense amplifier and precision internal reference combine to offer an accurate VDDQ supply. The ...

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