The TL431 is three-terminal adjustable shunt regulator with specified termal stability.
The output voltage may be set to any value between V REF (Approx. 2.5V) and 36V with two external resistors.
This device has a typical output inpedance of 0.2Ω.
Active output circuitry provides a very sharp turn-on characteristic, making this device excellent replacement for zener diodes in many application.

FEATURES
● Equivalent Full Range Temperature Coefficient 50PPM/℃
● Temperature Compensated For Operation Over Full Rate Operating Temperature Range
● Adjustable Output Voltage
● Fast Turn-on Response
● Sink Current Capability 1㎃ to 100㎃
● Low (0.2Ω Typ.) Dynamic Output Impedance
● Low Output Noise