80 mA fixed 3.3 V — sizing the rail
The MIC5203-3.3YM4-TR: This is a single-output positive LDO delivering a fixed 3.3 V at up to 80 mA continuous.
Industrial temperature and protection set
On-chip protection covers over-current, over-temperature, and reverse polarity — the reverse polarity clamp is the one that saves the part when a bench supply lead gets swapped during bring-up. The quiescent current sits at 750 µA typical, which matters for always-on circuits where the regulator's own draw competes with the sleep budget.
Housed in a 4-pin SOT-143 (TO-253AA equivalent) surface-mount package, the part occupies a compact footprint on the PCB. The supplier device package is listed as SOT-143 — confirm the land pattern matches the TO-253AA mechanical drawing before committing the layout. The enable pin (Control Features: Enable) allows the output to be gated by a logic signal, useful for power sequencing or shutting down a sub-circuit in sleep mode.
Compliance and regulatory pass-through
ROHS3 compliant per the lifecycle record — the part clears EU RoHS Directive 2011/65/EU and its amendment 2015/863.