The raw incoming voltage before any regulation.
Real geometry: CORE3588 copper, drawn from our board file (top and bottom layers; this net in amber)
VIN on CORE3588 is the net VBUS_RAW: the raw 5 V straight from the USB-C cable, before anything has checked or changed it.
- 1The USB-C socket: power arrives here from the cable.
- 2VIN ends at the input of the protection chip (U1). After it, the voltage has a new name.