Dual buck converter
Component appearing in 1 repair guide(s).

Appears in 1 guide(s)

MacBook Air A1466 / 820-00165 — Level 3 Repair Guide 820-0016
ReferenceU7501
PartDual buck converter (QFN-24)
FunctionGenerates PP3V3_S5 (3.3V/6.5A) and PP5V_S4RS3 (5V/7.2A)
RailsPP3V3_S5 PP5V_S4RS3
⚠ Failure
PP3V3_S5 absent → no S5. Check EN1/EN2 (SMC_PM_G2_EN). Output short = heat on chip.