The ADP3330ARTZ3.3-RL7 is a single-output, positive fixed 3.3V linear regulator from the anyCAP series, rated for 200mA continuous output. Its key parametric edge is a maximum dropout voltage of 0.23V at full load, which means a 3.6V input rail still holds regulation through a cold-crank or battery discharge event. Quiescent current is 50 µA typical, keeping standby draw low in always-on or battery-powered designs. Protection includes over-current and over-temperature shutdown, plus an error flag and a shutdown control pin for sequenced power-up.
Dropout headroom and quiescent current — the so-what
The 0.23V dropout (max) at 200mA is the headline number for this part. It dictates the minimum input-to-output differential: with a 3.3V output, the input must stay above 3.53V to maintain regulation. That 210 mV margin is tight for a 3.6V nominal rail, so factor in bulk decoupling and trace resistance. The 50 µA quiescent current is low for a 200mA LDO — compare against older bipolar designs that pull 2–5 mA. In a battery-powered sensor node, that difference extends standby life measurably.
Package and layout: SOT-23-6 thermal reality
The SOT-23-6 package (supplier device package SOT-23-6) is compact but thermally limited. At 200mA with a 1V dropout (e.g., 4.3V input), dissipation is 200 mW. In still air, the junction-to-ambient thermal resistance for SOT-23-6 is typically 200–250 °C/W, so junction rise could be 40–50°C above ambient. At 85°C ambient, junction temperature approaches 135°C — still within the 150°C abs-max, but derating margin is thin. Use a ground-plane pour under the package and keep the copper connected to the GND pin with a short, wide trace.