It is part of TI's Automotive, AEC-Q100 qualified series, which means every unit is manufactured and tested to the automotive reliability standard — not just a commercial-grade part that happens to survive under the hood. The reference is adjustable from a minimum of 1.24V up to 6V, set by two external resistors, with a guaranteed tolerance of ±1% over the full -40°C to 125°C operating range.
Where it fits in a BOM — shunt topology and the cathode current budget
The TLV431 regulates by sinking current through its cathode to ground. The cathode current must stay above 100 µA to maintain regulation and must not exceed 15 mA. The ±1% tolerance holds over temperature.
Lifecycle and sourcing — no LTB clock ticking
The ROHS3 compliance is also confirmed — no conflict with EU or China RoHS directives for the production run.
Packaging and marking — what to verify on incoming inspection
This package is compatible with standard SOT-23-5 footprints, simplifying PCB layout for automotive designs.