O'Reilly logo

Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 167

High efficiency linear and switching solutions for splitting a digital supply

Dave Dwelley and Gary Maulding

Abstract

This Design Note presents two methods of creating a split supply in a digital system that can provide good transient response while conserving supply current. The LT1118 specialized linear regulator, designed to source or sink current as necessary to keep its output in regulation, and the LTC1504 synchronized switching regulator are used in the examples given.

Keywords

Supply splitting

LT1118

LTC1504

It can be inconvenient to generate a split supply in a typical digital system. The classic solution is to use a pair of resistors between 5V and GND to create a 2.5V “ground” for analog circuitry (Figure 167.1 ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required