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APL1431AAI-TR

Adjustable Precision Shunt Regulator

Anpec Electronics 

APL1431

Adjustable Precision Shunt Regulator

Features

• Precise Reference Voltage to 2.500V

• Guaranteed 0.5% or 1% Reference Voltage

Tolerance

• Sink Current Capability , 1mA to 100mA

• Quick Turn-on

• Adjustable Output Voltage , VO = VREF to 20V

• Low Operational Cathode Current , 250µA

Typical

• 0.1Ω Typical Output Impedance

• SOT-23 , SOT-89 and TO-92 Packages

Applications

• Linear Regulators

• Adjustable Power Supply

• Switching Power Supply

General Description

The APL1431 is a 3-terminal adjustable voltage ref-

erence with specified thermal stability over applicable

commercial temperature ranges. Output voltage may

be set to any value between Vref (2.5 V) and 20 V with

two external resistors (see Figure 2). When used

with an photocoupler, the APL1431 is an ideal volt-

age reference in isolated feedback circuits for 2.5V

to 12V switching-mode power supplies. This device

has a typical output impedance of 0.1Ω. Active out-

put circuitry provides a very sharp turn-on

characteristic, making the APL1431 excellent replace-

ments for zener diodes in many applications, includ-

ing on-board regulation and adjustable power

supplies.

ANODE

3

1

2

CATHODE REF

SOT-23 (Top View)

Symbol

REF

Anode

Cathode

1

2

3

CATHODE ANODE REF

Functional Diagram

Cathode

REF

+

_

Vref

SOT-89 (Top View)

1 REF

2 ANODE

3 CATHODE

TO-92 (Top View)

Anode

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.

Copyright  ANPEC Electronics Corp.

1

Rev. A.3 - May., 2003

www.anpec.com.tw

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