The TL431 is a three-terminal adjustable shunt regulator and is output voltage adjustable to any value between Vref (approximately 2.5 V) and 36 V, with two external resistors. Typical output impedance of 0.2 Ohms. Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacements for Zener diodes.
Voltage Range: (Ref)2.5V to 36V
Current Sink Range: 1 to 100mA
Low temperature drift over it's entire temperature range of 0°C to 70°C.
MFG: Texas Instruments