AP432/AP432A

ADJUSTABLE PRECISION SHUNT REGULATOR

AP432/AP432A

Document number: DS31003 Rev. 16 - 2

1 of 14

www.diodes.com

June 2010

© Diodes Incorporated

Features

•

Precision reference voltage

•

AP432 : 1.24V ± 1%

•

AP432A : 1.24V ± 0.5%

•

Sink current capability: 200mA

•

Minimum cathode current for regulation: 150

μA

•

Equivalent full-range temp coefficient: 30 ppm/oC

•

Fast turn-on response

•

Low dynamic output impedance: 0.2

Ω

•

Programmable output voltage to 20V

•

Low output noise

•

Lead Free packages: SOT25, SC59, SC59R, SOT89-3L

and TO92-3L

•

SOT23, SOT23R, SOT25, SC59, SC59R, SOP-8L,

SOT89-3L and TO92-3L: Available in “Green” Molding

Compound (No Br, Sb)

•

Lead Free Finish/ RoHS Compliant (Note 1)

Description

The AP432 and AP432A are 3-terminal adjustable precision

shunt regulators with guaranteed stable temperature over

the applicable extended commercial temperature range.

The output voltage may be set at any level greater than

resistors that act as a voltage divider network. These

devices have a typical output impedance of 0.2

Ω. Active

output circuitry provides very sharp turn-on characteristics,

making these devices excellent improved replacements for

Zener diodes in many applications.

The precise +/- 1% reference voltage tolerance of the

AP432/AP432A make it possible in many applications to

avoid the use of a variable resistor, consequently saving

cost and eliminating drift and reliability problems associated

with it.

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

+

+

R2

R1

P recision R egulator

A P 432