Adjustable shunt reference in SOT-23-5
The LMV431ACM5-TI: As a shunt reference, it behaves like a Zener diode — it sinks current through the cathode to regulate the output voltage. The 80 µA minimum cathode current means the external resistor must supply at least that much to keep the part in regulation; the 15 mA maximum output current sets the upper load limit.
The supplier device package is SOT-23-5, a common footprint shared with many small-signal references and op-amps — the board layout matches the JEDEC standard MO-178 pattern. The part ships in Bulk packaging, not tape-and-reel — factor this into your pick-and-place setup if the line expects reels; a tube or tray feeder may be needed.