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LM431 - Adjustable Precision Zener Shunt Regulator

General Description

The LM431 is a 3-terminal adjustable shunt regulator with ensured temperature stability over the entire temperature range of operation.

The output voltage may be set at any level greater than 2.5 V (VREF) up to 36 V merely by selecting two external resistors that act as a voltage divided network.

Key Features

  • 1 Average Temperature Coefficient 50 ppm/°C.
  • Temperature Compensated for Operation Over the Full Temperature Range.
  • Programmable Output Voltage.
  • Fast Turnon Response.
  • Low-Output Noise.
  • Low-Dynamic Output Impedance.
  • Available in Space-Saving SOIC-8, SOT-23, and TO-92 Packages 2.

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Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM431 SNVS020H – MAY 2000 – REVISED JANUARY 2016 LM431 Adjustable Precision Zener Shunt Regulator 1 Features •1 Average Temperature Coefficient 50 ppm/°C • Temperature Compensated for Operation Over the Full Temperature Range • Programmable Output Voltage • Fast Turnon Response • Low-Output Noise • Low-Dynamic Output Impedance • Available in Space-Saving SOIC-8, SOT-23, and TO-92 Packages 2 Applications • Adjustable Voltage or Current Linear and Switching Power Supplies • Voltage Monitoring • Current Source and Sink Circuits • Circuits Requiring Precision References • Zener Diode Replacements 3 Description The LM431 is a 3-terminal adjustable shunt regulator with ensured temperature stability over t