65 V input LDO for industrial analog rails
The MAX5024SASA+: Output is adjustable from a 2.5 V minimum up to 11 V, with a fixed 3.3 V option on the same die — a single BOM position covers two voltage plans depending on the feedback divider.
PSRR and quiescent current — analog front-end fit
54 dB PSRR at 100 Hz means the regulator attenuates mains-frequency ripple by a factor of ~500 — enough to keep a 100 mVpp input ripple down to ~200 µVpp at the output, which is clean enough for a 12-bit ADC reference or a sensor bias rail. Quiescent current is 140 µA typical, low enough to leave the regulator powered continuously in a battery-backed or always-on subsystem without draining the hold-up capacitor overnight. Dropout voltage is 1.5 V maximum at the full 150 mA load — the input rail must stay at least 1.5 V above the programmed output voltage across the load range to maintain regulation.
Package and control interface
Three control pins — Enable, Hold, and Reset — give the system architect sequencing and reset generation without an external supervisor IC; the Hold pin lets the output stay in regulation during a brief input sag. Built-in over-temperature and short-circuit protection means the regulator survives an output short or a thermal event without latching off or damaging the load.
RoHS3 compliant (2011/65/EU + 2015/863), with no restricted substances above the threshold limits; suitable for EU-market equipment without an exemption claim.