343S00327 Power Management IC for iPad Pro 12.9 4th Gen (2020)

The 2020 iPad Pro 12.9-inch spreads its power over a big main PMIC and a couple of smaller Apple power chips. This listing covers the 169-pin part, which matters when the main PMIC tests fine but the iPad still won't start or loses a function.

It's the Apple 343S00327 power management IC for the iPad Pro 12.9-inch 4th gen (A2229, A2069, A2232). The listing gives its pin count as 169. The store also lists 343S00326 (342 pins) and 343S00328 (182 pins) for this iPad, so check the number on the chip you're replacing.

Possible reasons to replace it

• A missing rail with inputs and enables present.

• No boot while the main PMIC works.

• A short traced to the chip.

• Cracked joints after the chassis was bent.

On the bench

Measure each power chip's rails separately, so you know which one is at fault. The 12.9-inch board is large and thin; preheat it evenly and support it during removal.

Once fitted, check the rails and test boot, Face ID, LiDAR and charging before reassembly. If the chassis is bent, fix that as well, so the new joints aren't under strain.