LP2950-3.3100 mA low-dropout fixed regulator

LP2950-3.3 is a three-terminal low-dropout regulator for a fixed 3.3 V rail, supplying up to 100 mA when input headroom and temperature permit. The low ground current at light load makes it useful for modest battery-powered analog and digital circuits. This page covers TI C-grade LP2950CZ-3.3/NOPB in TO-92 and LP2950CDT-3.3/NOPB in TO-252. Their OUT and IN pin numbers are reversed: TO-92 uses OUT1/GND2/IN3, while TO-252 uses IN1/GND2/OUT3 with a grounded tab. All package views follow that selection. A suitable output capacitor is essential for stability. The illustrated 5 V to 3.3 V supply uses local 1 µF input bypass, a 10 µF output capacitor with verified ESR, and a 330 Ω test load. The related LP2951 adds control functions; the three-pin LP2950 has no shutdown or error output.