SN0903048 SMC Reset Controller IC

The SN0903048 is a System Management Controller (SMC) reset timing IC used in Apple MacBook logic boards. It ensures proper sequencing of power rails before the system enables the SMC, helping maintain stable power-on functionality. If this IC becomes faulty, the laptop may show no power or no response to the power button. The chip is commonly found on various MacBook Air and Pro logic boards in a compact QFN-8 package and is typically identified by markings such as R33E or R33U.

• Product Name: SN0903048 SMC Reset Controller IC
• Markings on IC: R33E / R33U
• Location on Board: U5000-series area (varies by model)
• Package Type: QFN-8 / DFN-8
• Application: MacBook motherboard SMC power sequencing
• Manufacturer: OEM – MacBook PMIC Series
• Stock: Ready Stock in Nehru Place, Delhi
• Condition: New & Properly Packed
• Warranty: Testing Warranty
• Quality: Quality tested by OKSpare