TL431 – Programmable Reference Voltage

RWF 500.00

TL431 is a regulator diode whose output voltage can be programmed by changing the value of resistors connected to it.


It acts almost like a Zener diode except for that the voltage rating of this IC is programmable. It is commonly used to provide negative or positive voltage references.


  • Programmable Zener diode
  • Output voltage: 2.5V to 36V
  • Output Current: 1mA to 100mA (sink current)
  • Output voltage tolerance: ±4%
  • Output Impedance: 0.22 ohms


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