SN650839 PMU Power Supply Chip

The SN650839 PMU Power Supply Chip (commonly labeled as SN650839ZAJR, P650839, or P650839A0D, and designated in schematics as U7800) is the main System Power Management Integrated Circuit (PMIC) integrated into Apple MacBook Pro logic boards.

This central PMU chip regulates and generates several critical sub-voltage power rails required by the CPU, system controller, and peripheral circuitry. When liquid damage, electrical overstress, or power surges burn or short the SN650839 IC, the logic board will fail to power on entirely or get stuck in a low-power state. Replacing this chip is the standard micro-soldering solution to revive dead boards.

Key Features

• OEM-Grade PMU Component: High-precision Power Management IC designed for exact multi-rail voltage switching and power sequencing.

• Core Voltage Management: Controls and distributes essential low-voltage rails to bring the motherboard out of standby into full operational state.

• Direct Micro-Soldering Fix: Replaces blown or liquid-damaged main power management chips to restore complete system boot capabilities.

Compatible MacBook Models

• MacBook Pro 13-inch (Touch Bar):

  • A1706 (Late 2016 / 2017)

Compatible Logic Board Numbers

• 820-00923, 820-00239, and related platform schematics.

Technical Specifications

• Part Markings / MPN: SN650839 / SN650839ZAJR / P650839 / P650839A0D

• Schematic Designation: U7800

• Package Type: BGA168 (Ball Grid Array)

• Condition: Brand New

Note for Technicians: Replacing BGA PMIC IC chips requires advanced micro-soldering equipment, quality flux, a pre-heater, and hot air rework station experience. Always verify surrounding capacitors and power rails for shorts prior to applying power to the repaired logic board.