FEATURES

• Programmable Output Voltage to 40V

• Low Dynamic Output Impedance 0.2Ω

• Sink Current Capability of 0.1 mA to 100 mA

• Temperature Compensated for Operation over Full Rated

Operating Temperature Range

• Low Output Noise Voltage

• Fast Turn on Respons

• TO-92 or SOT-23 and SOT-89 ,SO8packages

PIN CONNECTIONS

DESCRIPTION

The TL431A is a three-terminal adjustable regulator series with a guaranteed thermal stability over applicable temperature ranges.

The output voltage may be set to any value between Vref (approximately 2.5 volts) and 36 volts with two external resistors. These

devices have a typical dynamic output impedance of 0.2

Ω. Active output circuitry provides a very sharp turn-on characteristic,

making these devices excellent replacement for zener diodes in many applications.

The TL431A is characterized for operation from -0

SYMBOL

FUNCTIONAL BLOCK DIAGRAM

ABSOLUTE MAXIMUM RATINGS

(Operating temperature range applies unless otherwise specified)

Characteristic

Symbol

Value

Unit

Cathode Voltage

40

V

Cathode Current Range (Continuous)

100 ~ 150

mA

Reference Input Current Range

0.05 ~ 10

mA

Power Dissipation at 25

TO – 92 Package (R

SOT – 23 – 3 Package (R

0.7

0.2

W

W

Junction Temperature Range

0 ~ 150

Operating Temperature Range

0 ~ 70

Storage Temperature Range

-65 ~ +150

TL431A

Adjustable Precision Shunt Regulator

1

2

3

4

8

7

6

5

CATHODE

ANODE

ANODE

NC

REF

ANODE

ANODE

NC

SO8

TL431ACMX

TO-92

TL431ACLP--Bulk Pack

R

A

K

R

A

K

R

A

K

SOT-89

TL431ACPK

TL431ALT1

SOT-23

R

K

A

1

TL431ACLPM-Ammo Pack