The SMD431 is a 3‑terminal adjustable shunt voltage reference with 0.5%/1.0% accuracy, programmable output up to 36 V and sink current up to 100 mA.
The SMD431 provides a precise adjustable shunt regulator with guaranteed temperature stability. Output voltage can be set from 2.5 V to 36 V using external resistor dividers, making it suitable for precision shut regulators, high‑current shunt applications, and voltage monitoring.
The device is offered in TO‑92 and SOT‑23 packages, with absolute maximum ratings of 37 V cathode voltage and -100 mA to 150 mA cathode current. Detailed electrical characteristics, power dissipation tables, and package dimensions are provided for design reference.
| Initial voltage reference accuracy | 0.5% and 1.0% |
|---|---|
| Sink current capability | 1 mA to 100 mA |
| Typical output dynamic impedance | <200 mΩ |
| Maximum cathode voltage | 37 V |
| Cathode current range (continuous) | -100 mA to 150 mA |
| Reference input current range | 0.05 µA to 10 µA |
| Storage temperature range | -65 °C to 150 °C |
The device is rated for a maximum cathode voltage of 37 V.
It can sink current from 1 mA up to 100 mA.
Yes, it offers 0.5% or 1.0% initial voltage reference accuracy and low dynamic impedance, making it ideal for precision shut regulators and voltage monitors.