343S00543 Power Management IC for iPad Air 5 (2022, 46B0)

Of the power chips on an iPad Air 5 board, the largest has 440 pins and handles much of the board's power. When it fails, the Air 5 usually won't start, and a partly working board can also show display or touch faults that trace back to missing rails.

This listing sells the Apple 343S00543 power management IC, marked 46B0 according to the listing, for the iPad Air 5th gen (A2588, A2589, A2591). The listing gives its pin count as 440.

Typical reasons to replace it

• No boot with a good battery and charge port.

• Abnormal current at power-on.

• Display or touch faults that remain with known-good screen parts.

• A short traced to the PMIC.

Plan the job

Rule out the two smaller power chips (343S00465 and the 343S00480/343S00544 auxiliary IC) by measuring their rails first. If the 440-pin chip is the problem, use a preheater, remove underfill slowly and prepare the pads carefully.

After fitting, check the rails and test boot, touch, Touch ID and charging before sealing the screen with new adhesive. Let it charge fully once to be sure the rails hold.