PM8956 Power IC

Every technician who has chased a dead board knows the drill: charger connected, current draw shows on the power supply, but the phone stays lifeless. On a lot of Snapdragon 617 and 650-family devices, that symptom traces straight back to the PM8956. This IC sits at the center of the power tree, taking input from the battery and charging circuit and stepping it down into the multiple regulated rails the CPU, RAM, and peripherals depend on. When it goes bad, the board loses its ability to sequence power correctly, and the phone won't boot no matter what software fix you try.
You'll usually get called to this chip after a liquid damage case, a drop that cracked a solder joint, or a board that's been sitting with a dead short for too long. Before reaching for the hot air station, confirm you're actually dealing with a PM8956 fault and not a charging IC or battery connector issue — check for shorts on the power rails first, since replacing a good IC won't fix a shorted rail elsewhere on the board.This part ships as a bare BGA chip, so reballing is part of the job. Use a matching stencil for the PM8956 footprint, keep your preheat stage controlled to avoid lifting neighboring components, and reflow with a hot air station set for lead-free solder if that's what the donor board originally carried.A microscope helps a lot here — the ball pitch is tight enough that a misaligned placement will cost you a second reflow cycle.Boards that use the PM8956 usually pair it with the PMI8952 audio/power companion chip and, depending on model, a WCN3615 or WCN3680B Wi-Fi/Bluetooth combo IC. If your dead-board diagnosis points to a wider power issue rather than a single failed rail, check those companion ICs too before you commit to a PM8956 swap — some boards fail at the companion chip level and the PM8956 tests fine.Confirmed devices using this exact IC include the Xiaomi Mi Max, Redmi Note 3 (Snapdragon 650 variant), and Samsung Galaxy A9 Pro 2016 (A910F / SM-C9000). If you're working a different model with a Snapdragon 617 or 650 chipset and a dead-after-flash or no-power fault, cross-check the schematic before ordering — power IC part numbers vary even within the same chipset family.Store and handle this component in an anti-static bag until you're ready to reball. PMICs are sensitive to ESD damage, and a chip that tests dead on arrival is almost always the result of poor static handling rather than a manufacturing fault. Keep your workbench grounded and use a wrist strap when handling the bare IC.
For repair shops running Snapdragon-based board-level work regularly, keeping a small stock of PM8956 units on hand alongside your ISP jig and hot air station cuts turnaround time on dead-phone jobs considerably — this is one of the more frequently replaced PMICs in the mid-range Snapdragon lineup.