Changes with V1.2 PicoPD:
- Replace buck TPS62933 with LDO AP2204K-3.3. This will drop the total output current from 3A to 200mA. However, we get a much cleaner and more accurate 3V3 line to 0.5% (DeltaVout/Vout). Our internal ADC will happily accept this stable voltage. Lower dropout voltage means requesting PPS as low as 3.5V before messing up your ADC read scaling. Fortunately, the LDO output will still be stable, just less than 3.3V if the input is below 3.5V. The previous buck converter design will be unstable when the input voltage drops below 4V, causing the system to reset.
- Reduce component count.
Update on AP33772 library:
- Multiple users have tested the library and it seems to be stable.
- The latest release has included setMask and clearMask functions