The PA3489U-1MPC is actually a replacement AC adapter (power charger) for Toshiba Satellite laptops, not an internal component like a Wi-Fi or sound card. Therefore, it does not require a software driver.
The most significant issue facing users searching for the PA3489U-1MPC driver today is obsolescence. As technology marches forward, manufacturers often retire support pages for hardware that is considered "End of Life" (EOL). Toshiba Satellite Pa3489u-1mpc Driver
Follow this sequence exactly. Installing drivers out of order can lead to device conflicts. The PA3489U-1MPC is actually a replacement AC adapter