Adjustable shunt reference — 2.495 V to 36 V, 100 mA cathode
Its output is set with two external resistors anywhere between 2.495 V and 36 V, sourcing up to 100 mA through the cathode. The ±2% initial tolerance places this in the commercial bin — adequate for typical SMPS and linear regulator feedback, but not for precision instrumentation where tighter grades are needed.
Housed in an 8-SOIC wide-body package (0.209-inch body width, 5.30 mm), the TL431CPS uses the standard SOIC-8 footprint but takes more board area than the narrow SOIC-8 option. The 1 mA minimum cathode current must be maintained for proper regulation; designs with light load currents need a pull-up resistor to guarantee this bias.
Last Buy — sourcing window is closing
Production is winding down, and the final order window is active. Buyers should secure their lifetime or bridge quantities now — once the window closes, only surplus and broker channels will carry this part. For ongoing designs, consider migrating to an active TL431 variant in the same SOIC-8 footprint, such as the TL431A or TL431B series with tighter tolerance grades.