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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 169

Fast response low dropout regulator achieves 0.4 dropout at 4A

Craig Varga

Abstract

The LT1580 NPN regulator is described. It is designed to make use of higher supply voltages to provide power for the control circuitry and supply the drive current to the NPN output transistor, allowing a reduction in dropout voltage.

Keywords

Low dropout regulator

LT1580

NPN regulator

Low dropout regulators have become more common in desktop computer systems as microprocessor manufacturers have moved away from 5V only CPUs. A wide range of supply requirements exists today with new voltages just over the horizon. In many cases, the input-output differential is very small, effectively disqualifying many of the low dropout regulators on the ...

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