A voltage regulator connected to a memory cell is configured by identifying at least a first and a second operation regions of the cell and associating the first and second operation regions with respective first and second operation conditions of the memory cell. An operative condition of the memory cell involved in a programming operation is detected, and at least a configuration signal of the regulator according to said detected operative condition is generated, this configuration signal taking a first and a second value associated with the first and second operation conditions.