Yeah, as stated. It appears I have blown up part of the v.reg circuit on my T3.5 board. Robot turned over, and something shorted out, duh.
I can supply 3.3V to the Teensy module from an external v.reg, but not sure how to do it properly. If I simply backfeed 3.3V into the module, the T3.5 boots up and appears to function ok, but the external regulator overheats, so I'm assuming the LP38691 doesn't like being backfed, or else it's toasted.
Is there an "easy" way to cut the trace from the LP38691 output to the rest of the ckt? Top side of the module, as the bottom side is inaccessible. Or can I desolder the LP38691? FWIW, I can't even figure out which chip is the LP38691, as none of the labelling on the chips seems to be obvious.
I can supply 3.3V to the Teensy module from an external v.reg, but not sure how to do it properly. If I simply backfeed 3.3V into the module, the T3.5 boots up and appears to function ok, but the external regulator overheats, so I'm assuming the LP38691 doesn't like being backfed, or else it's toasted.
Is there an "easy" way to cut the trace from the LP38691 output to the rest of the ckt? Top side of the module, as the bottom side is inaccessible. Or can I desolder the LP38691? FWIW, I can't even figure out which chip is the LP38691, as none of the labelling on the chips seems to be obvious.