ACE431S

Adjustable Precision Shunt Regulator

VER 1.2

1 

Description

The ACE431S is a low voltage three terminal adjustable shunt regulator with a guaranteed thermal

stability over applicable temperature ranges. The output voltage can be set to any value between VREF

(approximately 2.5 V) to 18V with two external resistors. This device has a typical output impedance of

0.08Ω. Active output circuitry provides a very sharp turn on characteristic, making this device excellent

replacement for Zener diodes in many applications.

The ACE431S is characterized for operation from -40oC to 85oC, and five package options (SOT-23-3,

SOT-23-5, SOP-8, TO-92 and SOT-89-3) allow the designer the opportunity to select the proper package

for their applications.

Features

Application

● Linear Regulators

● Adjustable Supplies

● Switching Power Supplies

● Battery Operated Computers

● Instrumentation

● Computer Disk Drives

Absolute Maximum Ratings

Parameter

Symbol

Max

Unit

Cathode Voltage

18

V

Continuous Cathode Current

80

mA

Reference Current

1

mA

Operating Junction Temperature Range

-40 to 85

Storage Temperature Range

-65 to 150

SOT-89-3 120

SOT-23-3 230

SOT-23-5 230

SOP-8 150

Thermal Resistance

TO-92 220