LM4431 Micropower Shunt Voltage Reference | TI.com

LM4431 (ACTIVE) Micropower Shunt Voltage Reference

Micropower Shunt Voltage Reference - LM4431


Ideal for space critical applications, the LM4431 voltage reference is available in the sub-miniature (3 mm x 1.3 mm) SOT-23 surface-mount package. The LM4431's advanced design eliminates the need for an external stabilizing capacitor while ensuring stability with any capacitive load, thus making the LM4431 easy to use. The operating current range is 100 μA to 15 mA.

The LM4431 utilizes fuse and zener-zap reverse breakdown voltage trim during wafer sort to ensure that the parts have an accuracy of better than ±2.0% at 25°C. Bandgap reference temperature drift curvature correction and low dynamic impedance ensure stable reverse breakdown voltage accuracy over a wide range of operating temperatures and currents.


  • Small Package: SOT-23
  • No Output Capacitor Required
  • Tolerates Capacitive Loads
  • Fixed Reverse Breakdown Voltage of 2.50V

Key Specifications

  • Output Voltage Tolerance: 25°C: ±2.0% (Max)
  • Low Output Noise (10 Hz to 10 kHz): 35 μVrms (Typ)
  • Wide Operating Current Range: 100 μA to 15 mA
  • Commercial Temperature Range: 0 to +70 °C
  • Low Temperature Coefficient: 30 ppm/°C (Typ)

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Part number Order Reference voltage VO (V) VO adj (Min) (V) VO adj (Max) (V) Initial accuracy (Max) (%) Rating Operating temperature range (C) Iz for regulation (Min) (uA) Iout/Iz (Max) (mA) Package Group
LM4431 Order now Fixed     2.5     2.5     2.5     2     Catalog     0 to 70     100     15     SOT-23 | 3