TL431 has many uses in electronics, its most common uses are under voltage and over voltage monitoring, window voltage monitoring etc. 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. ![]() It is also capable to provide stable performance on its wide temperature range. Moreover this IC can be operated from 1mA to 100mA current range with typical ouput impedance value of 0.22 Ohms. 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. TL431 is a shunt regulator diode IC available in TO-92 and other packages.
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