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1.24V cost effective shunt regulator

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The ZTLV431 is a three terminal adjustable shunt regulator offering excellent temperature stability and output current handling capability up to 20mA. The output voltage may be set to any chosen voltage between 1.24 volts and 10 volts by selection of two external divider resistors. The ZTLV431 can be used as a replacement for zener diodes in many applications requiring an improvement in zener performance. The ZTLV431 is available as standard as an A grade which has an initial tolerance of 1% and covers the -40°C to 125°C temperature range as standard.


  • Opto-coupler linearization
  • Linear regulators
  • Improved Zener
  • Variable reference


  • Low voltage operation VREF = 1.24V
  • Temperature range -40 to 125°C
  • Reference voltage tolerance at 25°C
  • 1% ZTLV431A
  • Typical temperature drift
  • 4 mV (0°C to 70°C)
  • 6 mV (-40°C to 85°C)
  • 11mV (-40°C to 125°C)
  • 100μA minimum cathode current
  • 0.25Ω typical output impedance
  • Adjustable output voltage 1.24V to 10V
  • Product Specifications

    Product Parameters

    Compliance (Only Automotive supports PPAP) Standard
    Qualified to AEC-Q10x No
    ReferenceVoltage (V) 1.24 V
    Accuracy (%) 1 %
    MaximumInput Voltage (V) 10 V
    Sink Current (mA) 15 mA
    Minimum Cathode Current for Regulation Typ (µA) - µA
    Maximum Slope Resistance (Ω) 0.4 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.