M005X02 Power IC

Board-level technicians see the same pattern on Samsung Galaxy S8 boards again and again: battery tests fine, charger tests fine, but the phone still won't charge or power on. In most of these cases the fault traces back to the M005X02, the small power IC sitting close to the charging circuit on S8, S8+, C9 and C9 Pro motherboards. This chip works as a power driver for the charging path. It takes input from the charging port, regulates it, and feeds it forward into the device's main power management IC. When it fails, charging current either drops, stops completely, or becomes unstable — the board may charge for a few seconds and cut off, or show zero response on the charging port entirely. On a workshop bench you'll usually confirm this with a current test on the charging line: normal draw with no voltage rise at the battery points to this IC rather than the battery or charging port itself. Replacing this IC is a hot air reballing or direct-solder job depending on your setup. Preheat the board evenly, protect nearby components with kapton tape, and pull the faulty chip with controlled hot air before cleaning the pads and reflowing the replacement. Because the M005X02 sits in a dense area of the board next to other small ICs, a fine-tip nozzle and steady hand matter more than raw heat — overheating the surrounding components is the most common way this repair goes wrong. Common tickets that lead technicians to this chip include dead after flash, no charging light, phone hangs on logo while plugged in, and boards that draw current but never register a charge. On C9 and C9 Pro boards specifically, this IC is also checked whenever a customer reports the phone charging only in a certain cable orientation or losing charge overnight while off. Keep in mind this chip is board-specific. It's built for the S8-family power architecture and shouldn't be substituted into other Samsung models even if the physical package looks similar — cross-fitting a wrong power IC risks damaging the main PMIC or the battery protection circuit. If you're stocking parts for a service center that handles regular S8/S8+/C9 volume, keeping a few of these on hand alongside your other Samsung charging-circuit chips saves board turnaround time on one of the more frequent repair tickets for this device family. For technicians doing frequent PMIC-side work, this IC pairs naturally with your existing hot air rework station and a decent board holder — precision placement matters more than raw skill here, since the pads are small and closely spaced to neighboring components.