200 mA LDO for noise-sensitive supply rails
The MAX16910CASA9+T is a positive-output linear regulator from Analog Devices, delivering 200 mA with a dropout voltage of 0.6 V at full load. That 0.6 V headroom means the input rail must stay at least 0.6 V above the output voltage across the load range — if you are regulating a 3.3 V rail from a 5 V supply, you have margin; from a 3.8 V rail, you are right at the edge. Its 60 dB PSRR at 100 Hz makes it a solid choice for cleaning up ripple from a switching preregulator feeding an analog front-end — the 60 dB rejection at line frequency knocks down 100/120 Hz hum by a factor of 1000 before it reaches the load.
30 V input with automotive temp range
The input range goes up to 30 V, which covers a 12 V automotive bus with room for load-dump transients — the internal protection handles over-temperature and short-circuit events without latching up.
Adjustable output with fixed-voltage options
Quiescent current is 30 µA typical, low enough to keep the regulator powered on a battery-backed rail without draining the cell during sleep modes.
Package and thermal path
The part is active in production with no end-of-life notice from Analog Devices, and it is ROHS3 compliant — no exemption issues for EU or California markets.