A power supply circuit comprising: a plurality of circuit blocks (104-1; 104-2, 104-3;104-4) configured to convert an input voltage (Vin) to an output voltage (Vout); each circuit block comprising a respective driver circuit (306-1, 306-2, 306-3, 306-4) coupled to respective power elements (304-1; 304-2, 304-3; 304-4) and configured to drive the power elements (304-1; 304-2, 304-3; 304-4); a regulator controller (108; 328) coupled to the circuit blocks (104-1; 104-2, 104-3; 104-4) via respective driver circuit (306-1, 306-2, 306-3, 306-4) and configured to control the power elements (304-1; 304-2, 304-3; 304-4) for the conversion of the input voltage to the output voltage; and at least one bypass switch (112-1; 112-2; 312-1, 312-2) coupled to the circuit blocks (104-1; 104-2, 104-3; 104-4) wherein the at least one bypass switch (112-1; 112-2; 312-1, 312-2) is used to bypass at least one of the circuit blocks (104-1, 104-2, 104-3, 104-4), the power supply circuit is configured to operate in a buck operational mode or a boost operational mode, wherein the circuit blocks (104-1; 104-2, 104-3; 104-4) are further configured to convert the input voltage to the output voltage that is lower than the input voltage in the buck operational mode, and wherein the circuit blocks (104-1; 104-2, 104-3; 104-4) are further configured to convert the input voltage to the output voltage that is higher than the input voltage in the boost operational mode, the power supply circuit being characterized in that each of the at least one bypass switch (112-1; 112-2; 312-1, 312-2) is further configured to bypass one of the circuit blocks (104-1; 104-2, 104-3; 104-4) that is not needed for the buck operational mode or the boost operational mode in which the power supply circuit is operating. a plurality of circuit blocks (104-1; 104-2, 104-3;104-4) configured to convert an input voltage (Vin) to an output voltage (Vout); each circuit block comprising a respective driver circuit (306-1, 306-2, 306-3, 306-4) coupled to respective power elements (304-1; 304-2, 304-3; 304-4) and configured to drive the power elements (304-1; 304-2, 304-3; 304-4); a regulator controller (108; 328) coupled to the circuit blocks (104-1; 104-2, 104-3; 104-4) via respective driver circuit (306-1, 306-2, 306-3, 306-4) and configured to control the power elements (304-1; 304-2, 304-3; 304-4) for the conversion of the input voltage to the output voltage; and at least one bypass switch (112-1; 112-2; 312-1, 312-2) coupled to the circuit blocks (104-1; 104-2, 104-3; 104-4) wherein the at least one bypass switch (112-1; 112-2; 312-1, 312-2) is used to bypass at least one of the circuit blocks (104-1, 104-2, 104-3, 104-4), the power supply circuit is configured to operate in a buck operational mode or a boost operational mode, wherein the circuit blocks (104-1; 104-2, 104-3; 104-4) are further configured to convert the input voltage to the output voltage that is lower than the input voltage in the buck operational mode, and wherein the circuit blocks (104-1; 104-2, 104-3; 104-4) are further configured to convert the input voltage to the output voltage that is higher than the input voltage in the boost operational mode, the power supply circuit being characterized in that each of the at least one bypass switch (112-1; 112-2; 312-1, 312-2) is further configured to bypass one of the circuit blocks (104-1; 104-2, 104-3; 104-4) that is not needed for the buck operational mode or the boost operational mode in which the power supply circuit is operating.