Description
The AS431 is a three-terminal adjustable shunt regulator with guaranteed thermal stability over a full operation range. It features sharp turn-on characteristics, low temperature coefficient and low output impedance, which make it ideal substitute for Zener diode in applications such as switching power supply, charger and other adjustable regulators.

Features
 • 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/°C Typical
 • Sink Current Capacity from 1mA to 100mA
 • Low Output Noise
 • Wide Operating Range of -40 to +125°C
 • Lead-Free Packages: SOT23, SOT25, TO92 (Ammo Packing), SOT89
     • Totally Lead-Free; RoHS Compliant (Notes 1 & 2)
 • Lead-Free Packages, Available in “Green” Molding Compound: SOT23, SOT25, TO92 (Ammo Packing), SOT89
    ◾ Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
    ◾ Halogen and Antimony Free. “Green” Device (Note 3)

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