A power supply circuit comprising: - two output terminals (102a, 102b) for providing a current ( i out); - a current generator configured to generate a regulated current ( i L), wherein said current generator comprises: a) a switching stage comprising one or more electronic switches (SW 1) and one or more inductors, said switching stage being configured to provide said regulated current ( i L) as a function of one or more drive signals ( DRV 1), b) a current sensor configured to detect at least one feedback signal indicative of said regulated current ( i L) provided by said switching stage, and c) a regulator circuit comprising a comparison circuit and configured to generate said one or more drive signals ( DRV 1) for said switching stage as a function of said at least one feedback signal and one or more reference/threshold signals (REF; TH H, TH L), whereby said regulated current ( i L) comprises a ripple and said regulated current ( i L) varies periodically between an upper threshold ( TH H) and a lower threshold ( TH L); - a further electronic switch (SW 2; SW 21, SW 22, SW 23) configured to selectively short circuit the output of said current generator as a function of a further drive signal ( DRV 2); and - a control circuit configured to generate said further drive signal ( DRV 2) for opening or closing selectively said further electronic switch (SW 2; SW 21, SW 22, SW 23); characterized in that said current generator is configured to activate or deactivate the generation of said regulated current ( i L) as a function of an enable signal, and said control circuit is configured to generate said enable signal and said further drive signal ( DRV 2), in order to repeat periodically the following steps: a) after a first time-interval ( T DIS), activating said current generator; b) after a second time-interval ( T on), opening said further electronic switch (SW 2; SW 21, SW 22, SW 23), c) after a third time-interval ( T ON2), closing said further electronic switch (SW 2; SW 21, SW 22, SW 23), and d) after a fourth time-interval ( T off), deactivate said current generator, wherein the duration of said second time interval ( T on) corresponds substantially to the time required until the current provided by the current generator reaches said upper threshold ( TH H) after an activation of said current generator. - two output terminals (102a, 102b) for providing a current ( i out); - a current generator configured to generate a regulated current ( i L), wherein said current generator comprises: a) a switching stage comprising one or more electronic switches (SW 1) and one or more inductors, said switching stage being configured to provide said regulated current ( i L) as a function of one or more drive signals ( DRV 1), b) a current sensor configured to detect at least one feedback signal indicative of said regulated current ( i L) provided by said switching stage, and c) a regulator circuit comprising a comparison circuit and configured to generate said one or more drive signals ( DRV 1) for said switching stage as a function of said at least one feedback signal and one or more reference/threshold signals (REF; TH H, TH L), whereby said regulated current ( i L) comprises a ripple and said regulated current ( i L) varies periodically between an upper threshold ( TH H) and a lower threshold ( TH L); a) a switching stage comprising one or more electronic switches (SW 1) and one or more inductors, said switching stage being configured to provide said regulated current ( i L) as a function of one or more drive signals ( DRV 1), b) a current sensor configured to detect at least one feedback signal indicative of said regulated current ( i L) provided by said switching stage, and c) a regulator circuit comprising a comparison circuit and configured to generate said one or more drive signals ( DRV 1) for said switching stage as a function of said at least one feedback signal and one or more reference/threshold signals (REF; TH H, TH L), whereby said regulated current ( i L) comprises a ripple and said regulated current ( i L) varies periodically between an upper threshold ( TH H) and a lower threshold ( TH L); - a further electronic switch (SW 2; SW 21, SW 22, SW 23) configured to selectively short circuit the output of said current generator as a function of a further drive signal ( DRV 2); and - a control circuit configured to generate said further drive signal ( DRV 2) for opening or closing selectively said further electronic switch (SW 2; SW 21, SW 22, SW 23); a) after a first time-interval ( T DIS), activating said current generator; b) after a second time-interval ( T on), opening said further electronic switch (SW 2; SW 21, SW 22, SW 23), c) after a third time-interval ( T ON2), closing said further electronic switch (SW 2; SW 21, SW 22, SW 23), and d) after a fourth time-interval ( T off), deactivate said current generator,