Fixed 3V LDO in SOT-23-5 — parametric fit for low-power rails
The MIC5203-3.0YM5-TR is a fixed-output 3V positive LDO regulator from Microchip Technology, delivering up to 80 mA in a SOT-23-5 package. Quiescent current is 750 µA typical — relevant for always-on or battery-backed circuits where the regulator's own draw competes with the load. An enable pin lets the system shut down the output when the rail is unused. Operating temperature spans -40°C to 125°C, covering industrial and under-hood automotive ambient without derating. Protection includes overcurrent, overtemperature, and reverse polarity — the reverse-polarity clamp saves an external Schottky on the input if the supply can be miswired.
Package and rework — SC-74A / SOT-753 footprint
Surface-mount assembly with standard reflow profiles; no special bake requirement beyond the MSL level on the reel label.
For a BOM hedge, the fixed 3V output and 80 mA ceiling are the binding constraints; any alternative must match the SOT-23-5 footprint and enable logic polarity.