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LM431

SNVS020H – MAY 2000 – REVISED JANUARY 2016

LM431 Adjustable Precision Zener Shunt Regulator

1 Features

3 Description

The LM431 is a 3-terminal adjustable shunt regulator

1

•

Average Temperature Coefficient 50 ppm/°C

with ensured temperature stability over the entire

•

Temperature Compensated for Operation Over

temperature range of operation. The output voltage

the Full Temperature Range

may be set at any level greater than 2.5 V (VREF) up

•

Programmable Output Voltage

to 36 V merely by selecting two external resistors that

act as a voltage divided network. Due to the sharp

•

Fast Turnon Response

turnon characteristics this device is an excellent

•

Low-Output Noise

replacement for many Zener diode applications.

•

Low-Dynamic Output Impedance

The LM431 is available in space-saving SOIC-8,

•

Available in Space-Saving SOIC-8, SOT-23, and

SOT-23, and TO-92 packages.

TO-92 Packages

Device Information(1)

2 Applications

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

Adjustable Voltage or Current Linear and

SOIC (8)

4.90 mm × 3.91 mm

Switching Power Supplies

LM431

SOT-23 (3)

2.92 mm × 1.30 mm

•

Voltage Monitoring

TO-92 (3)

4.30 mm × 4.30 mm

•

Current Source and Sink Circuits

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

•

Circuits Requiring Precision References

•

Zener Diode Replacements

LM431 Symbol

Functional Block Diagram

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.