Precision Adjustable

Shunt Reference

TL431

FEATURES

DESCRIPTION

The TL431 is an adjustable shunt regulator designed to act as

an open-loop error amplifier with a 2.5V temperature

compensated reference.

Its highly accurate 1% bandgap

reference is perfect for applications requiring stability and

accuracy over temperature and life.

Sharp turn-on characteristics and a low temperature coefficient

make the TL431 an excellent replacement for many zener

diode applications, programmable to any value greater than

2.5V and up to 36V by using two external resistors. As a

combination error amplifier and reference, it can be used to

manage control loops such as switching power supplies.

ORDERING INFORMATION

Part

Package

Temperature Range

TL431LP

TO-92

0 to 105

TL431D

8-Pin Plastc SOIC

0 to 105

TL431S

SOT-89

0 to 105

CORPORATION

CATHODE

ANODE

REFERENCE

TO-92 (LP)

1G-33

SOIC (D)

8

7

6

5

1

2

3

4

REFERENCE

ANODE

ANODE

N/C

CATHODE

ANODE

ANODE

N/C

1G-34

1G-35

CATHODE

ANODE

REFERENCE

SOT-89 (S)

PIN CONFIGURATION (Top View)