Dual-rail LDO in a single TSOT-23-6
The MIC5320-SJYD6-TR: That means one part powers both the analog front-end and the digital core on a mixed-signal board, saving the second regulator footprint and the extra ceramic caps on its output. Dropout is 0.1 V max at 150 mA per channel — the headroom between the input rail and the 2.5 V output must stay above 100 mV across the full load range, or the output falls out of regulation. For a 3.3 V input feeding the 2.5 V rail, that leaves 0.7 V of margin; plenty until the input dips below 2.6 V.
PSRR roll-off and where it matters
PSRR measures 65 dB at 1 kHz and drops to 45 dB at 20 kHz — the crossover frequency where upstream switching noise from a buck converter starts passing through. If the input rail carries 500 kHz ripple, the LDO attenuates it by maybe 20 dB at best; a pi filter ahead of the LDO is worth the two ceramic caps and a ferrite bead. Quiescent current is 120 µA per channel, 190 µA max supply current for both rails combined. For an always-on sensor node drawing 50 µA from the 3.3 V rail, the LDO's own consumption dominates the sleep budget — a load-switch to cut the LDO when the system sleeps doubles battery life.
Industrial temperature and protection
A motor-drive control board sitting at 85°C ambient still has 40°C of margin before the thermal shutdown kicks in. Over-current and over-temperature protection are built in; the LDO folds back current on a shorted output and recovers when the junction cools.