A method of generating a regulated voltage, comprising: generating an output voltage from a high voltage source; providing an inductor having a first terminal and a second terminal linked to a low voltage source by a capacitor, the second inductor terminal supplying the output voltage to a load; generating command signals as a function of a high voltage supplied by the high voltage source and the output voltage, to reduce a difference between the output voltage and a reference voltage lower than the high voltage; and connecting the first inductor terminal exclusively either to the high input voltage or the low voltage or to the inductor second terminal, as a function of the command signals; wherein when the output voltage is lower than the reference voltage reduced by a tolerance voltage, the first inductor terminal is connected to the high voltage source for a clock period in accordance with the command signals, and wherein when the output voltage is greater than the reference voltage reduced by a tolerance voltage and lower than the reference voltage, the first inductor terminal is connected to the high voltage source for a first period, and connected to the low voltage source for a second period adjacent to the first period in accordance with the command signals; wherein the first period is the clock period multiplied by a first positive integer number, and the second period is the clock period multiplied by a second positive integer number, the first and second positive integer numbers being defined such that the ratio of the first integer number to a sum of the first and second positive integer numbers is lower or equal to the ratio of the output voltage to the high voltage. generating an output voltage from a high voltage source; providing an inductor having a first terminal and a second terminal linked to a low voltage source by a capacitor, the second inductor terminal supplying the output voltage to a load; generating command signals as a function of a high voltage supplied by the high voltage source and the output voltage, to reduce a difference between the output voltage and a reference voltage lower than the high voltage; and connecting the first inductor terminal exclusively either to the high input voltage or the low voltage or to the inductor second terminal, as a function of the command signals; wherein when the output voltage is lower than the reference voltage reduced by a tolerance voltage, the first inductor terminal is connected to the high voltage source for a clock period in accordance with the command signals, and wherein when the output voltage is greater than the reference voltage reduced by a tolerance voltage and lower than the reference voltage, the first inductor terminal is connected to the high voltage source for a first period, and connected to the low voltage source for a second period adjacent to the first period in accordance with the command signals; wherein the first period is the clock period multiplied by a first positive integer number, and the second period is the clock period multiplied by a second positive integer number, the first and second positive integer numbers being defined such that the ratio of the first integer number to a sum of the first and second positive integer numbers is lower or equal to the ratio of the output voltage to the high voltage.