5V fixed rail with 150 mA capability
The MAX8868EUK50-T: The maximum dropout voltage is 165 mV at full load, meaning the input rail must stay at least 165 mV above 5 V across the load range to maintain regulation — a 5.2 V minimum input is a safe budget. Power-supply rejection is 63 dB at 10 kHz, which attenuates switching-noise ripple from a preceding DC-DC converter by roughly three orders of magnitude — relevant when powering analog front-ends or precision references from a noisy bus.
Protection and control features
The regulator integrates over-current, over-temperature, reverse-polarity, and short-circuit protection, covering the common fault conditions in a single-supply portable or industrial design. An Enable pin allows the output to be gated for sequenced power-up or low-power sleep modes. Quiescent current is 180 µA typical, with a maximum supply current of 100 µA — moderate for an always-on rail but acceptable for battery-backed applications where the load itself dominates the power budget.
Package and temperature grade
Housed in a SOT-23-5 (SC-74A) surface-mount package, the part suits compact PCB layouts where board area is constrained. The Bulk packaging means the parts are supplied in tubes or trays rather than tape-and-reel — confirm pick-and-place compatibility if the line expects reel-fed components.
RoHS compliance note
For BOMs requiring RoHS conformance, verify the exemption status or consider the lead-free variant in the same family.