- supplied the XNOR gate with 5V instead of 3.3V
- added a MOSFET to drive the 3.3V DC/DC converter's EN pin
- removed a pull-up resistor at the ON/OFF line
- updated the 5V line (diode connected sources - USB and DC/DC)
- proposed a power on-off circuit based on a XNOR gate
- reannotated the schematic
- updated the PDF
* Second TPS562203-based converter for 3.3 V rail.
* Changed inductors for a thinner variant 2.8 mm instead of 4.8 mm
* Recommended inductors are SRN6028-4R7M or FNR6028S4R7MT
* Removed 3.3V LDO output from the SoM
* Maximum expected power consumption: 3.2 W
* Maximum output current from the DC/DC converter: 0.65 A + 20%
* L3 inductor is missing footprint, will be added later
