The AZ431-B is a three-terminal adjustable shunt regu- lator with guaranteed thermal stability over a full oper- ation range. It features sharp turn-on characteristics, low temperature coefficient and low output impedance, which make it ideal substitute for Zener diode in appli- cations such as switching power supply, charger and other adjustable regulators.
The output voltage of AZ431-B can be set to any value between VREF (2.5V) and the corresponding maximum cathode voltage. The AZ431-B precision reference is offered in two voltage tolerance: 0.4% and 0.8%. This IC is available in 4 packages: TO-92 (bulk or ammo packing), SOT-23, SOT-23-5 and SOT-89.