The MAX38903AATB+ comes in a 10-WFDFN exposed pad package (3x3 mm TDFN). Without a proper via array to a copper plane, the junction temperature will exceed the 125 °C rating under sustained load.
PSRR across the noise band
PSRR is 70 dB at 1 kHz, rolling off to 40 dB at 1 MHz. This means the regulator suppresses low-frequency ripple from a switching pre-regulator well, but above 100 kHz the rejection drops — a downstream LC filter or a second LDO stage may be needed if the noise floor at 1 MHz must stay below 1 mV.
Dropout and quiescent budget
Maximum dropout is 0.3 V at 1 A, so the input rail must stay at least 300 mV above the programmed output voltage across the full load range. Quiescent current is 2 mA — not a micropower LDO, but acceptable for always-on rails in a mixed-signal system where the 1 A output and protection set (over-current, over-temperature, reverse polarity) justify the overhead.