A method is provided for controlling turn-on of phases of a multiphase regulator. According to the method, there are tested the conditions necessary for the turn-on of a phase to be turned-on indicated by a first cell of the phase register, and in response to a positive result a corresponding ramp signal is reset. There is then tested the conditions necessary for the turn-on of a phase successive to the phase to be turned on according to the list of priorities of the phase register, and corresponding ramp signals are reset if there is a positive result. In response to no positive results of testing conditions necessary for the turn-on of all phases successive to the phase to be turned on, there is reset a ramp signal corresponding to a phase successive to a last turned on phase indicated by a last cell of the phase register.