The MCP1825T-3002E/DC comes in a SOT-223-6 package with a supplier device package designation of SOT-223-5 — the thermal pad and pin 5 are internally connected, so the PCB footprint uses a 5-pad layout with the tab as the ground plane.
Dropout and PSRR — what they mean for the rail
PSRR is 60 dB at 100 Hz, which attenuates 100 mV of 100 Hz ripple to 100 µV at the output; this matters for analog supply rails where line-frequency hum couples into the signal chain.
