The PMD9645 is the original Qualcomm baseband power management IC (BBPMU_RF) used in iPhone 7 and iPhone 7 Plus logic boards. This small 103-pin power IC regulates voltage supply to the baseband section, directly controlling network stability, signal detection, and modem power sequencing. Technicians replace this chip when a phone shows no service, drops network randomly, gets stuck searching, or goes dead after a failed flash attempt. Reflow or replacement demands hot air precision and a steady hand, since the pads sit close to other RF components. Stock this IC for your baseband and network-issue repair bench.
