What is it?

TS431 series 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
volts with two external resistors. These devices exhibit a
wide operating current range of 0.3 to 100mA with a
typical dynamic impedance of 0.22Ohm.
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 2.495V reference makes it
convenient to obtain a stable reference from 5.0V logic
supplies, and since The TS431 series operates as a
shunt regulator, it can be used as either a positive or
negative stage reference.

Use cases

• Constant Current source
• Precision reference voltage for operational amplifier
• (High current) Shunt regulator
• Output Control for Three Terminal Fixed Regulator

Additional components are necessary!

You get

• the chips in tape like shown on the photo
• the 1% type TS431ACX RF