The TL431, A, 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 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 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 TL431, A, B operates as a shunt regulator, it can be used as either a positive or negative voltage reference.
●Features
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● 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
● Low Output Noise Voltage
● Pb-Free Packages are Available
