The TL431A, B integrated circuits are three−terminal

programmable shunt regulator diodes. These monolithic IC voltage

references operate as a low temperature coefficient zener which is

programmable from Vref 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 references make them excellent replacements for zener diodes in

many applications such as digital voltmeters, power supplies, and op

amp circuitry. The 2.5 V reference makes it convenient to obtain

a stable reference from 5.0 V logic supplies, and since the TL431A,

B operates as a shunt regulator, it can be used as either a positive or

negative voltage reference.

Features

• Programmable Output Voltage to 36 V

• Voltage Reference Tolerance: ±0.4, Typ @ 25°C (TL431B)

• Low Dynamic Output Impedance, 0.22  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

• Low Output Noise Voltage

• NCV/SCV Prefixes for Automotive and Other Applications

Requiring Unique Site and Control Change Requirements;

AEC−Q100 Qualified and PPAP Capable

• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant