Copyright

 ANPEC Electronics Corp.

Rev. B.8 - Mar., 2005

APL431L

www.anpec.com.tw

1

ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise

customers to obtain the latest version of relevant information to verify before placing orders.

Low Voltage Adjustable Precision Shunt Regulator

Features

General Description

Applications

The APL431L is a 3-terminal low voltage adjustable

precision reference with specified thermal stability

over applicable commercial temperature ranges. Out-

put voltage may be set to any value between V

24 V) and 20 V with two external resistors (see Fig-

ure 2). When used with an photocoupler, the

APL431L is an ideal voltage reference in isolated feed-

back circuits for 3V to 12V switching-mode power

supplies. This device has a typical output imped-

ance of 0.1

Ω. Active output circuitry provides a very

sharp turn-on characteristic, making the APL431L ex-

cellent replacements for zener diodes in many

applications, including on-board regulation and ad-

justable power supplies.

•••••

Precise Reference Voltage to 1.24V

Tolerance

•••••

Sink Current Capability, 80uA to 100mA

•••••

Quick Turn-on

•••••

Adjustable Output Voltage, V

•••••

Low Operational Cathode Current, 80µA

Typical

•••••

0.1

Ω Typical Output Impedance

•••••

SOT-23-3, SOT-23-5, TO-92 and SOT-89

Packages

•••••

Linear Regulators

•••••

Adjustable Power Supply

•••••

Switching Power Supply

Symbol

Functional Diagram

+

_

Cathode

REF

Anode

SOT-23-3 (Top View)

REF

ANODE

CATHODE

12

3

SOT-89 (Top View)

REF

ANODE CATHODE

12

3

REF

AN O D E

CATHO D E

3

2

1

TO-92 (Top View)

Cathode

Anode

REF

REF

NC

CATHO DE

NC

ANO DE

12

3

4

5

SOT-23-5 (Top View)