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

• Fast Turnon Response act as a voltage divided network. Due to the sharp

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

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