ZXRE160

Document number: DS35688 Rev. 2 - 2

3 of 15

www.diodes.com

June 2012

© Diodes Incorporated

ZXRE160

A Product Line of

Diodes Incorporated

Functional Block Diagram

The ZXRE160 differs from most other shunt regulators in that it

has separate input and output pins and a low voltage reference.

This enables it to regulate rails down to 600mV and makes the

part ideal for isolated power supply applications that use

opto-couplers in the feedback loop and where the open-collector

output is required to operate down to voltages as low as 200mV.

The wide input voltage range of 2V to 18V and output voltage

range of 0.2V to 18V enables the ZXRE160 to be powered from

an auxiliary rail, while controlling a master rail which is above the

allows it to operate as a low-dropout voltage regulator for

microprocessor/DSP/PLD cores.

As with other shunt regulators (and shunt references), the

ZXRE160 compares its internal amplifier FB pin to a high

accuracy internal reference; if FB is below the reference then OUT

turns off, but if FB is above the reference then OUT sinks current

– up to a maximum of 15mA.