The MAX1589ETT150+ is a low-dropout linear regulator from Maxim Integrated, delivering a fixed 1.5 V output at up to 500 mA from a maximum 3.6 V input rail. Quiescent current draws 140 µA typical, making it suitable for battery-powered or always-on subsystems where the regulator's own consumption matters at light load. Power-supply rejection is 70 dB at 1 kHz, meaning ripple on the input at that frequency is attenuated by a factor of roughly 3,160 before reaching the output — a meaningful figure for analog front-ends or RF stages sharing a rail with a switching converter.
Package and board-fit considerations
Surface-mount assembly with the 6-WDFN footprint; the pad layout should follow the recommended land pattern in the datasheet to avoid solder bridging on the narrow leads.
Protection features and operating range
On-chip over-temperature and short-circuit protection guard the regulator and downstream load against fault conditions — the output current folds back during a short, limiting junction temperature rise. Control features include an enable pin for shutdown and a reset output that flags when the output drops out of regulation — useful for sequencing multiple rails on power-up.