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APL1431L

Low Voltage Adjustable Precision Shunt Regulator

Anpec Electronics 

APL1431L

Low Voltage Adjustable Precision Shunt Regulator

Features

General Description

• Precise Reference Voltage to 1.24V

• Guaranteed 0.5% or 1% Reference Voltage

Tolerance

• Sink Current Capability , 60mA to 100mA

• Quick Turn-on

• Adjustable Output Voltage , VO = VREF to 20V

• Low Operational Cathode Current , 60mA

Typical

• 0.1Ω Typical Output Impedance

• SOT-23-5 Packages

Applications

• Linear Regulators

• Adjustable Power Supply

• Switching Power Supply

The APL1431L is a 3-terminal low voltage adjust-

able precision reference with specified thermal sta-

bility over applicable commercial temperature ranges

. Output voltage may be set to any value between

V (1.24 V) and 20 V with two external resistors

REF

(see Figure 2) . When used with an photocoupler ,

the APL1431L is an ideal voltage reference in iso-

lated feedback circuits for 1.24V to 12V switching-

mode power supplies . This device has a typical

output impedance of 0.1Ω . Active output circuitry

provides a very sharp turn-on characteristic , mak-

ing the APL1431L excellent replacements for zener

diodes in many applications , including on-board

regulation and adjustable power supplies .

ANODE REF

5

4

12 3

Symbol

REF

NC NC CATHODE

Functional Diagram

Anode

Cathode

C a th od e

REF

+

−

VREF

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.4 - May., 2003

www.anpec.com.tw

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