ZR431

ADJUSTABLE PRECISION ZENER SHUNT REGULATOR

ZR431

Document number: DS33255 Rev. 6 - 2

1 of 9

www.diodes.com

October 2011

© Diodes Incorporated

Description

The ZR431 is a three terminal adjustable shunt regulator

offering excellent temperature stability and output current

handling capability up to 100mA. The output voltage may be

set to any chosen voltage between 2.5 and 20 volts by

selection of two external divider resistors.

The devices can be used as a replacement for zener diodes

in many applications requiring an improvement in zener

performance.

Features

•

Surface mount SOT223 and SOT23 packages

•

2%, 1 % and 0.5% tolerance

•

Max. temperature coefficient 55 ppm/°C

•

Temperature compensated for operation

•

over the full temperature range

•

Programmable output voltage

•

50

μA to 100mA current sink capability

•

Low output noise

•

All package options available in “Green” Molding

Compound (No Br, Sb) and Lead Free Finish/ RoHS

Compliant (Note 1)

Pin Assignments

Applications

•

Shunt regulator

•

Series regulator

•

Voltage monitor

•

Over voltage/ under voltage protection

•

Switch mode power supplies

Notes:

1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at

http://www.diodes.com/products/lead_free.html.

Typical Application Circuit

 

+

V

REF

V

Z

GND

GND

V

REF

V

Z

1

3

2

SOT23

(Top View)

1

2

3

4

V

Z

GND

V

REF

GND

SOT223

Pin 4 floating or

connected to pin 2

(Top View)