TL431 Precision Programmable Reference IC

TL431 is a shunt regulator diode IC available in TO-92 and other packages. This is a three terminal IC. The output voltage can be adjusted from 2.5V to 36V with the help of a resistor divider connected with its reference pin or pin1. Moreover this IC can be operated from 1mA to 100mA current range with typical ouput impedance value of 0.22 Ohms. It is also capable to provide stable performance on its wide temperature range. It can be used as a replacement for the zener diode in wide variety of applications because it works just like a zener diode the only difference is that its output is adjustable.
Applications: Voltage Comparator Circuits, Battery Charger & Monitor Circuits, Solar Applications, Switching Supply Circuits.