Key parametrics — what drives the fit
The MAX15007AASA+: Rated for 40 V maximum input, the part regulates down to a fixed 3.3 V output at up to 50 mA — a common rail for low-power microcontrollers, sensor front-ends, or isolated bias supplies in industrial and automotive environments. The 66 dB PSRR at 100 Hz means the output rejects 100 Hz ripple (from a mains rectifier or upstream switcher) by a factor of roughly 2000 — useful when the LDO sits after a noisy DC-DC converter feeding an analog circuit. Dropout voltage is 1 V maximum at the full 50 mA load, so the input rail must stay at least 1 V above 3.3 V across all load and temperature conditions to maintain regulation. Quiescent current is 18 µA typical, with a maximum supply current of 150 µA — the part's own draw is low enough for always-on or battery-backed rails where every microamp counts.
Package and temperature grade
Housed in an 8-SOIC with exposed pad (8-SOIC-EP), the package allows heat to sink through the PCB copper plane — the exposed paddle must be soldered to a thermal land on the board for rated current at high ambient. Supplied in tube format — the ordering code MAX15007AASA+ corresponds to the tube quantity; a tape-and-reel variant exists under a different suffix if the pick-and-place line requires reel feed.
Protection and control
Built-in over-temperature and short-circuit protection prevent damage from a faulted load or a soldering-iron incident during board rework. An Enable pin allows the regulator to be shut down under firmware control — useful for sequencing multiple rails or reducing system idle current to the 150 µA supply maximum.