The TL431 is a programmable shunt voltage reference with guaranteed temperature stability over the entire operating temperature range. The device's temperature range is extended for the automotive version from - 40 °C up to + 125 °C. The output voltage can be set to any value between 2.5 and 36 V with two external resistors. The TL431 operates with a wide current range from 1 to 100 mA with a typical dynamic impedance of 0.22 Ω.
