What is the role of the power management IC on a hard drive PCB?

The power management IC on a hard drive PCB is responsible for managing the power supply to the hard drive. It regulates the voltage and current that is supplied to the hard drive, and ensures that the power supply is stable and reliable. The power management IC also provides protection against power surges, spikes, and other electrical disturbances that can damage the hard drive. The power management IC is an essential component of the hard drive, as any malfunction can cause the hard drive to fail or become damaged.