3V fixed rail with 150mA headroom
The ADP150ACBZ-3.0-R7 is a fixed 3V positive-output LDO regulator delivering up to 150mA continuous current from a 2.2V to 5.5V input rail. Maximum dropout is 160mV at the full 150mA load, meaning the input must stay above 3.16V across the load range to maintain regulation — a 3.3V rail with 5% tolerance (3.135V min) would risk dropout at high current; a 3.6V or 5V rail provides comfortable margin.
Quiescent budget and thermal envelope
Quiescent current is 22µA typical, rising to a maximum supply current of 320µA — this places the regulator in the low-Iq class suited for always-on sensor nodes or battery-backed domains where the LDO's own draw must not dominate the sleep budget. The 4-WLCSP package (0.76x0.76mm body) has a thermal resistance dictated by the board copper area under the bump array — the junction-to-ambient path is through the PCB, not a heatsink tab. Built-in protection includes over-current, over-temperature, and under-voltage lockout (UVLO) — the UVLO threshold prevents the pass element from operating in the linear region when the input rail sags, avoiding excessive dissipation.