A boosted supply voltage generator is selectively activated and deactivated to allow operations that are sensitive to variations on the boosted voltage to be performed with a stable boosted voltage. Techniques for deactivating and reactivating the voltage generator are also disclosed that enable more rapid recovery from deactivation such that subsequent operations can be commenced sooner. Such techniques include storing state information corresponding to the voltage generator when deactivated, where the stored state information is used when reactivating the voltage generator. Stored state information can include a state of a clock signal provided to the voltage generator.