Fixed 5V rail for always-on and battery-backed supplies
The MAX15006BASA+T is a single-output positive linear regulator delivering a fixed 5V output at up to 50mA from a 40V maximum input rail.
Dropout voltage and input headroom
Maximum dropout is 0.525V at the full 50mA load — the input rail needs to stay above 5.525V to keep the output in regulation across temperature and load. With a 40V absolute maximum input, the part handles 12V, 24V, and 48V nominal rails with margin for transients; the wide input range eliminates the need for a pre-regulator in many designs.
PSRR and ripple rejection from rectified mains
Power-supply rejection ratio is 66 dB at 100 Hz — this is the fundamental ripple frequency from a full-wave rectified 50 Hz mains, so the LDO attenuates the bulk-capacitor ripple by a factor of roughly 2000 before it reaches the 5V rail.
Protection features and compliance
Built-in over-temperature shutdown and short-circuit protection mean the regulator survives a sustained output fault without external crowbar or fuse — the thermal loop cycles the output until the fault clears.