U3 to IC1 Transfer
Phase A: verify Stage 1 state, exact-part availability, and TPS63802 footprint geometry
Phase B: replace L3, add and wire U3, and add feedback divider
Verify capacitor evidence, touched-net diffs, ERC, and all negative checks independently
DFE201612E-R47M=P2REG_SW2; U3 pin 9/L3 pin 1=REG_SW1PGOOD_N unchanged