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The AN431 series ICs are three-terminal adjustable shunt regulators with guaranteed thermal stability over a full operation range. These ICs feature sharp turn-on characteristics, low temperature coefficient and low output impedance, which make them ideal substitutes for Zener diodes in applications such as switching power supply, charger and other adjustable regulators. The output voltage of these ICs can be set to any value between VREF (2.5V) and the maximum cathode voltage (36V). The AN431 precision reference is offered in two voltage tolerance: 0.5% and 1.0%.


  • Charger
  • Voltage Adapter
  • Switching Power Supply
  • Graphic Card
  • Precision Voltage Reference


  • Programmable Precise Output Voltage from 2.5V to 36V
  • High Stability under Capacitive Load
  • Low Temperature Deviation: 4.5mV Typical
  • Low Equivalent Full-range Temperature Coefficient with 20PPM/oC Typical
  • Low Dynamic Output Resistance: 0.15Ω typical
  • Sink Current Capacity from 1mA to 100mA
  • Low Output Noise
  • Wide Operating Range of -40 to +125°C
  • Product Specifications

    Product Parameters

    Compliance (Only Automotive supports PPAP) Standard
    Qualified to AEC-Q10x No
    ReferenceVoltage (V) 2.5 V
    Accuracy (%) 0.5, 1 %
    MaximumInput Voltage (V) 36 V
    Sink Current (mA) 100 mA
    Minimum Cathode Current for Regulation Typ (µA) 400 µA
    Maximum Slope Resistance (Ω) 0.5 Ω
    Operating Ambient Temperature Range (°C) -40 to 125 °C

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    Our shunt voltage regulator portfolio includes 2.5V, 1.24V, and 0.6V reference voltage devices covering consumer, computing, industrial, and automotive applications.

    It includes industry standard TL431 and TL432 equivalents, as well as footprint compatible, very low minimum (knee) current for latest low standby power isolated power supplies. Additionally, it includes a well enhanced operating voltage range TLV431 (1.24V) equivalents. All of the 2.5V and 1.24V support operating temperatures up to 125°C as standard, therefore reducing the number of variants that need to be qualified and stocked.

    Automotive-compliant variants are available which are qualified to AEC-Q100 Grade 1 in IATF 16949 facilities supporting PPAP documentation.

    Orderable Part Number Buy from Distributor / Contact Sales Request Samples


    Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
    Mouser Electronics Inc. 37 9/17/2021 South America, North America, Asia, Europe, Middle East Buy Now
    Digi-Key Electronics 171 9/16/2021 Europe, Asia, North America Buy Now
    Request Sample


    Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
    Arrow Electronics 270 9/17/2021 United States Buy Now
    Farnell, An Avnet Company 3000 9/17/2021 England Buy Now
    Farnell, An Avnet Company 3000 9/17/2021 England Buy Now
    Request Sample


    Product Change Notices

    PCN # Issue Date Implementation Date Subject
    PCN-2514 2021-03-09 2021-06-09 Additional Wafer Source JKFAB
    PCN-2471 2020-07-01 2020-11-29 Additional Wafer Source - GFAB