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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 148

Reduce component count and improve efficiency in SLIC and RF power supplies

Tick Houk

Abstract

The use of the LTC3704 to reduce component count and improve efficiency in SLIC and RF power supplies is described.

Keywords

DC/DC controller

SLIC power supply

LTC3704

Introduction

Nonisolated power supplies with negative output voltages require op amps and other “glue” circuitry in order to level-shift the feedback voltage to the error amplifier. In applications such as SLIC (subscriber line interface circuit) power supplies, this extra circuitry adds unwanted cost and requires more space on the PC board, with no increase in system performance.

The LTC3704 is a high performance, single-ended current mode DC/DC controller IC ...

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