Table of Contents
LM431 can be used like a zener diode, but with an adjustable output voltage.
![LM431 Programmable Shunt Regulator Adjustable Voltage component diagram by electronzap electronzapdotcom](https://electronzap.com/wp-content/uploads/2022/01/LM431-Programmable-Shunt-Regulator-Adjustable-Voltage-component-diagram-by-electronzap-electronzapdotcom.png)
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Other circuit fragments:
![LM431 shunt regulator and single supply comparator schematic diagrams by electronzap electronzapdotcom](https://electronzap.com/wp-content/uploads/2022/01/LM431-shunt-regulator-and-single-supply-comparator-schematic-diagrams-by-electronzap-electronzapdotcom.png)
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