The TL431, A, B integrated circuits are three-terminal programmable shunt regulator diodes. These monolithic IC voltage erences operate as a low temperature coefficient zener which is programmable from V to 36 V with two external resistors. These devices exhibit a wide operating current range of 1.0 mA to 100 mA with a typical dynamic impedance of 0.22 . The characteristics of these erences make them excellent replacements for zener diodes in many applications such as digital voltmeters, power supplies, and op amp circuitry. The 2.5 V erence makes it convenient to obtain a stable erence from 5.0 V logic supplies, and since the TL431, A, B operates as a shunt regulator, it can be used as either a positive or negative voltage reference.
Programmable Output Voltage to 36 V
Voltage Reference Tolerance:+/- 0.4%, Typ @ 25°C (TL431B)
Low Dynamic Output Impedance, 0.22 W Typical
Sink Current Capability of 1.0 mA to 100 mA
Equivalent Full-Range Temperature Coefficient of 50 ppm/ °C Typical
Temperature Compensated for Operation over Full Rated Operating Temperature Range