The TL431 is three terminal adjustable shunt regulator offering excellent temperature stability and output current handling capability up to 100mA. The output voltage may be set to any chosen voltage between 2.5 and 36 volts by selection of two external divider resistors. The devices can be used as a replacement for zener diodes in many applications requiring an improvement in zener performance. Diodes’ TL431 has the same electrical specifications as the industry standard ‘431 and is available in 2 grades with initial tolerances of 1% and 0.5% for the A and B grades respectively.
Secondary side regulation
Temperature range -40 to 125°C
Reference Voltage Tolerance at 25°C
TL431A: 2.495V ± 1.0%.
TL431B: 2.495V ± 0.5%
Low Output Noise
0.2Ω Typical Output Impedance
Sink Current Capability: 1mA to 100mA
Adjustable Output Voltage: VREF to 36V
SOT23 and SOT25: Available in “Green” Molding Compound (No Br, Sb) and Lead Free Finish/ RoHS Compliant