Read the data sheet

My bad, I threw the 5V Boost/Buck converter on the board with minimal concern for the layout. Eventually all the 5V converters would die, probably due to a bad layout. Got new tools to remove these parts, not to replace them but to bypass them for now (see big black wire)So the 5V stuff that I wanted to run at a higher voltage to get more punch and to be able to disable for power savings, is now running off 3.3 V. But no more smoked components. And the I2C bus is happy because all the ships are always powered up. BTW even with the new microscope and lots of capton tape, removing the converters is very hard. Took out extra components the first time, but they were in support of the converter so no loss. Boards are now stable, LED’s ar eworking, but no sound, haptic or imu (accelerometer), yet.