What the MAX884ESA+ actually does
It can be configured as an adjustable regulator with an output down to 1.25V, or strapped for a fixed 3.3V output — the datasheet calls this 'Adjustable (Fixed)' because the same die supports both modes depending on the feedback pin connection. Output current is rated at 200mA, and the maximum input voltage is 11.5V, so it covers common 5V and 9V rails cleanly. Dropout voltage maxes out at 0.64V at the full 200mA load, meaning the input needs to stay at least that much above the output to maintain regulation. For a 3.3V output, a 3.9V or higher input rail gives comfortable headroom. Quiescent current is a low 15 µA typical, and the maximum supply current is 25 µA — this is a part you leave powered on a battery-backed rail without worrying about drain. Control features include an enable pin and a low-battery detection output. Protection covers over-current, over-temperature, and reverse polarity — useful for designs where the input supply might get connected backwards or see a transient overload.
The 8-SOIC footprint (3.90mm width, 0.154" pitch) is a standard surface-mount package that reflows easily and doesn't need a thermal pad — the junction-to-ambient thermal resistance of an SOIC-8 is adequate for 200mA at moderate voltage drops, but if you're dropping more than a few volts at full current, a bit of copper pour on the PCB helps keep the die cool. Positive output configuration only. Output current 200mA.