Method and apparatus for controlling power supply

A device for controlling a power supply of an integrated circuit, the power supply comprising a power supply unit intended to be powered by a main voltage and possessing several transistor groups, which device comprises a control stage (CTRL) configured to control a turn-on of at least two transistor groups in succession in order to deliver, as output from each group, to at least one part of the integrated circuit, an elementary supply voltage derived from the main voltage, characterized in that it comprises a detection stage, comprising:

• a defining stage able to define voltage thresholds respectively associated with the transistor groups;
• and
• a comparator configured to compare an elementary supply voltage delivered by the group turned on last with the voltage threshold associated with the following transistor group, and in that the control stage is furthermore configured to control the turn-on of a transistor group when the elementary supply voltage delivered by the group turned on last is higher than or equal to the voltage threshold associated with said transistor group.

A device for controlling a power supply of an integrated circuit, the power supply comprising a power supply unit intended to be powered by a main voltage and possessing several transistor groups, which device comprises a control stage configured to control a turn-on of at least two transistor groups in succession in order to deliver, as output from each group, to at least one part of the integrated circuit, an elementary supply voltage derived from the main voltage, characterized in that it comprises a detection stage, comprising:

• defining means able to define voltage thresholds respectively associated with the transistor groups;
• and
• comparing means configured to compare an elementary supply voltage delivered by the group turned on last with the voltage threshold associated with the following transistor group, and in that the control stage is furthermore configured to control the turn-on of a transistor group when the elementary supply voltage delivered by the group turned on last is higher than or equal to the voltage threshold associated with said transistor group.