Some suggestions for parts in the OPL

Seeed Services Fusion PCB/ PCBA Services
2

Another issue: the N-channel transistor that is available is only 20 V DS and 8 V GS.
I’d like a small N-channel transistor with at least 30 V DS and 20 V GS. This is useful for:

  • Reverse polarity protection on input. GS needs to be maximum supported input voltage.
  • Backflow prevention after a bipolar regulator like the 7805 or 1117. (A CMOS regulator like the MCP1804 doesn’t need this.)