Abstract
The present invention discloses a power booting sequence control system and the control method thereof, which optimizes a power booting sequence of a plurality of power switches in an integrated circuit. An initial module initializes a target charge value, a preset current value and a plurality of time slots. A current lookup module obtains a booting current across a power switch from a built-in current lookup table. A first and a second computing unit compute a first and a second power switch number respectively. A processing module selects the small number of the first and the second power switch number to get a maximum number of power booting switches under the time slots, and opens the maximum number of the power booting switches. Therefore, the power booting sequence control system keeps the in-rush current value under the preset current value and speeds up the ramp-up time when powering up an integrated circuit.