50 mA fixed 5V LDO with a tight dropout — what that means on the rail
The Analog Devices ADP3300ARTZ-5REEL7 is a single-output, positive fixed 5V linear regulator from the anyCAP® series, delivering up to 50 mA. Its maximum dropout voltage of 0.17V at the full 50 mA load means you can hold the 5V rail with an input as low as 5.17V — useful when the pre-regulator bus is marginal or you're running from a battery near its end-of-discharge voltage. The quiescent current sits at 300 µA, and the maximum supply current is 1.7 mA, so it's not a micropower part but it won't waste the rail on a lightly loaded board. Control features include an error flag and a shutdown pin, and protection covers overcurrent and overtemperature events.
SOT-23-6 — small footprint, reworkable
The part comes in a 6-lead SOT-23 package (SOT-23-6). That's a small, low-profile surface-mount package that reflows cleanly with standard profiles and is hand-reworkable with hot air if you're careful — the leads are on the sides, not under the body, so you can see the joints and touch them up. No exposed pad, so thermal dissipation goes through the leads and the board copper; at 50 mA continuous the junction rise is modest, but if you're pushing near the limit in a warm enclosure, give the output trace some copper area. Pin 1 orientation is marked by a dot or notch on the package body.
The anyCAP® series is stable with any output capacitor type — ceramic, tantalum, or electrolytic — which simplifies the BOM and avoids the ESR windowing that older LDOs require.