TL431 Voltage Reference


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The TL431 is a three−terminal programmable shunt regulator diode.  This can be used to create a stable voltage reference, a constant current sink / source, and a variety of other useful circuits!

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SKU: IC-023 Manufacturer: ON Semiconductor Mfg Part Number: TL431BILPG Category: Tags: ,


The TL431 is a three−terminal programmable shunt regulator diode. This monolithic IC voltage reference operates as a low temperature coefficient Zener which is programmable from Vref to 36V with two external resistors. They exhibit a wide operating current range of 1.0mA to 100mA with a typical dynamic impedance of 0.22 ohms.

The characteristics of these references make them excellent replacements for Zener diodes in many applications such as digital voltmeters, power supplies, and op-amp circuitry. The 2.5V reference makes it convenient to obtain a stable reference from 5.0V logic supplies, and since the TL431 operates as a shunt regulator, it can be used as either a positive or negative voltage reference.


  • Programmable Output Voltage to 36V
  • Voltage Reference Tolerance: ±0.4%, Typ @ 25°C
  • Low Output Noise Voltage
  • Temperature Compensated
  • Sink Current Capability of 1.0mA to 100mA
  • Minimum Operating Temperature: -40°C
  • Maximum Operating Temperature: 85°C
  • Temperature Coefficient: 50 PPM/°C

Package Contents

  • 1 x TL431 Voltage Reference

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  Difficulty Level

Soldering Skill: N/A
Prototyping Skill: Intermediate
Programming Skill: N/A

  Product Certifications

  Product Attributes

Weight: 1 g

  Warranty Policy

This product has a 30 Day Warranty from the date of delivery. The item must not be modified, abused, incorrectly hooked up, or used for purposes outside the original scope of design.

  Return Policy

This product is returnable Within 14 Days of delivery for a store credit. Item must be unopened, unused, and in re-saleable condition.

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