Adjustable Precision Shunt Regulator

AP431/AP431A

This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of

this product. No rights under any patent accompany the sale of the product.

Rev.1.0 May.7, 2004

1/17

Features

•

Precision reference voltage

AP431 : 2.495V ± 1%

AP431A : 2.495V ± 0.5%

•

Sink current capability: 200mA

•

Minimum cathode current for regulation: 300μA

•

Equivalent full-range temp coefficient: 30 ppm/

•

Fast turn-on response

•

Low dynamic output impedance: 0.2Ω

•

Programmable output voltage to 36v

•

Low output noise.

•

Packages: TO92, SOT89, SOT23, SOT25 and

SOP

Description

The AP431/AP431A are 3-terminal adjustable

precision

shunt

regulators

with

guaranteed

temperature stability over the applicable extended

commercial temperature range. The output voltage

up to 36V merely by selecting two external resistors

that act as a voltage divider network. These devices

have a typical output impedance of 0.2Ω. 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 AP431/431A 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.

Ordering Information

A P 4 3 1 X X X X X

Package

Packing

Blank : Tube or bulk

A

: Taping

Reference Voltage

Tolerance:

Blank : +/- 1%

A

: +/- 0.5%

Operating Temp. Range

Blank : SOP-8L

Y

: SOT89-3L

V

: TO92-3L

W

: SOT23-3L

R

: SOT23-3L

Q

: SOT25

Lead Free

Blank : Normal

L : Lead Free Package

Typical Application Circuit

+

+

R2

R1

Precision Regulator

AP431