Reviewed AP7381-33V-A against the official Diodes Incorporated datasheet and updated the project with:
https://www.diodes.com/datasheet/download/AP7381.pdf
Key findings:
- MPN: AP7381-33V-A
- Manufacturer: Diodes Incorporated
- Function: wide-input 150 mA ultra-low quiescent-current LDO regulator
- Output: fixed 3.3 V, ±2%
- Package code: V = TO92 ammo packing
- Status note: datasheet marks AP7381-XXV-A as not recommended for new design
- Recommended operating VIN: 3.3 V to 40 V
- Absolute max VIN: -0.3 V to 45 V
- Output current / current limit: 150 mA min
- Typical dropout at 100 mA, 3.3 V output: 1000 mV
- Ground current: 2.5 µA typ at no load, 25 µA typ at 100 mA
- Required external caps: CIN = 1 µF, COUT = 2.2 µF
Cross-check results:
- Symbol pin numbering matches the TO92 datasheet pinout:
- Pin 1 = VOUT
- Pin 2 = GND
- Pin 3 = VIN
- Footprint pad pitch is 2.54 mm with three through-hole pads, consistent with TO92 ammo packing.
- Footprint asset is labeled
AP738133VA.kicad_mod, matching the part/package intent.
Flagged mismatches / issues:
- Terminal pin types are currently Unspecified instead of VIN = power input, GND = ground, VOUT = power output.
- Terminal pin descriptions are minimal/missing compared with the datasheet descriptions.
- The part is marked not recommended for new design in the datasheet; consider AP7375 or another active Diodes LDO for new designs if lifecycle matters.