Diodes Incorporated

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5.0V Low Knee Current voltage reference

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The ZRB500 uses a bandgap circuit design to achieve a precision micropower voltage reference of 5.0 volts. The device is available in small outline surface mount packages, ideal for applications where space saving is important, as well as packages for through hole requirements. The ZRB500 design provides a stable voltage without an external capacitor and is stable with capacitive loads. The ZRB500 is recommended for operation between 50μA and 15mA and so is ideally suited to low power and battery powered applications. Excellent performance is maintained to an absolute maximum of 25mA, however the rugged design and 20 volt processing allows the reference to withstand transient effects and currents up to 200mA. Superior switching capability allows the device to reach stable operating conditions in only a few microseconds.


  • ± 3%, 2% and 1% tolerance
  • Operating current 50μA to 15mA
  • Typical TC 15ppm/°C
  • Transient response, stable in less than 10μs
  • Industrial temperature range
  • Small outline SOT23 and TO92 style packages
  • Application(s)

  • Battery powered and portable equipment
  • Metering and measurement systems
  • Instrumentation
  • Test equipment
  • Data acquisition systems
  • Precision power supplies
  • Product Specifications

    Product Parameters

    Type Shunt reference
    Compliance (Only Automotive supports PPAP) Standard
    AEC Qualified No
    ReferenceVoltage (V) 5 V
    Tolerance (%) 2, 1 %
    Sink Current (mA) 15 mA
    Minimum Cathode Current for Regulation Typ (µA) 15 µA
    Typical Temperature Coefficient (ppm/°C) 15 ppm/°C
    Maximum Slope Resistance (Ω) 1.5 Ω
    Noise Voltage (µV/Hz) 105 µV/Hz
    Operating Ambient Temperature Range (°C) -40 to 85 °C

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