Precision shunt reference in a compact footprint
The Texas Instruments TL431BCDCKT is an adjustable shunt voltage reference from the industry-standard TL431 family, offering a ±0.5% tolerance on the 2.495 V internal reference. This tighter grade (B suffix) makes it the choice for precision power-supply feedback loops, error amplifiers, and reference circuits where the standard 1% or 2% grades leave too little margin. The 100 mA cathode current rating sets the maximum load the shunt can sink, which directly sizes the bias resistor and the power dissipation in the SC-70-6 package.
SC-70-6 package and thermal considerations
The 600 µA minimum cathode current ensures the shunt stays in regulation even at light load.