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     The TL431 is a three-terminal adjustable regulator series with a guaranteed thermal stability over applicable temperature ranges. The output voltage may be set to any value between Vref (approximately 2.495 volts) and 40 volts with two external resistors. These devices have a typical dynamic output impedance of 0.2Ω. Active output circuitry provides a very sharp turn-on characteristic making these devices excellent replacement for zener diodes in many applications. The TL431  is characterized for operation from -40 to +125.



  • Programmable output voltage to 36V

  • Low dynamic output Impedance 0.2Ω.

  • Sink current capability of 1 mA to 100 mA.

  • Equivalent full-range temperature coefficient of 50 ppm/

  • Temperature compensated for peration over full Rated  operating Temperature Range

  • Low output noise voltage .

  • Fast turn on respons.

  • Provided pb-free packages.

  • ESD tolerance (human body model) 2000V.

  • Package outline: TO-92, SOT-23.

Internal Function Block Diagram



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