TECHNICAL DATA

Programmable Precision Reference

TL431

PIN CONNECTIONS

FEATURES

• Programmable Output Voltage to 40V

• Low Dynamic Output Impedance 0.2Ω

• Sink Current Capability of 0.1 mA to 100 mA

• Equivalent Full-Range Temperature

Coefficient of 50 ppm/

• Temperature Compensated for Operation over

Full Rated Operating Temperature Range

• Low Output Noise Voltage

• Fast Turn on Response

• TO-92, SOP- 8, SOT-23, SOT-89 packages

CATHODE

ANODE

REFERENCE

DESCRIPTION

The TL431 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 40 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 TL431 is characterized for operation from -25

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

0.7

0.2

W

W

Junction Temperature Range

-40 ~ 150

Operating Temperature Range

-40 ~ +85

Storage Temperature Range

-65 ~ +150

Rev. 00