A DC-to-DC converter comprising: a DC-input comprising a positive input terminal and a negative input terminal a DC-output comprising a positive output terminal and a negative output terminal, two or more inductors (L1, L2) coupled to a common core; three switches (A, B, C) including two or more active switches, a controller configured to control operation of the DC-to-DC converter by controlling the active switches a positive input branch, a negative input branch, a positive output branch, a negative output branch and an internal branch, and a positive internal node and a negative internal node; wherein: the positive input branch is connected between the positive input terminal and the positive internal node; the negative input branch is connected between the negative input terminal and the negative internal node; the internal branch is connected between the positive internal node and the negative internal node; the positive output branch is connected between the positive internal node and the positive output terminal; the negative output branch is connected between the negative internal node and the negative output terminal; wherein: the first of the at least two coupled inductors is located in series with the DC-input, either in the positive input branch or in the negative input branch; the second of the at least two coupled inductors is located in series with the DC-output, either in the positive or in the negative output branch; the first of the at least two active switches is located in series with the DC-input, either in the positive input branch or in the negative input branch the internal branch consists of the second of the at least two active switches; and the remaining third switch is located in series with the DC-output, either in the positive output branch or in the negative output branch; characterized in that, the controller is further configured to select a DC-DC topology among a set of more than one possible DC-DC topologies based on the input voltage of the DC-input, by controlling the at least two active switches so that one of the three switches is forced to conduct current permanently according to the selected topology, as long as the selected topology does not change, the remaining two switches are forced to alternately conduct current in a complementary way such that the total number of inductors conducting current is alternately changed and the DC-DC power conversion is performed according to the selected topology. a DC-input comprising a positive input terminal and a negative input terminal a DC-output comprising a positive output terminal and a negative output terminal, two or more inductors (L1, L2) coupled to a common core; three switches (A, B, C) including two or more active switches, a controller configured to control operation of the DC-to-DC converter by controlling the active switches a positive input branch, a negative input branch, a positive output branch, a negative output branch and an internal branch, and a positive internal node and a negative internal node; wherein: the positive input branch is connected between the positive input terminal and the positive internal node; the negative input branch is connected between the negative input terminal and the negative internal node; the internal branch is connected between the positive internal node and the negative internal node; the positive output branch is connected between the positive internal node and the positive output terminal; the negative output branch is connected between the negative internal node and the negative output terminal; wherein: the first of the at least two coupled inductors is located in series with the DC-input, either in the positive input branch or in the negative input branch; the second of the at least two coupled inductors is located in series with the DC-output, either in the positive or in the negative output branch; the first of the at least two active switches is located in series with the DC-input, either in the positive input branch or in the negative input branch the internal branch consists of the second of the at least two active switches; and the remaining third switch is located in series with the DC-output, either in the positive output branch or in the negative output branch; characterized in that, the controller is further configured to select a DC-DC topology among a set of more than one possible DC-DC topologies based on the input voltage of the DC-input, by controlling the at least two active switches so that one of the three switches is forced to conduct current permanently according to the selected topology, as long as the selected topology does not change, the remaining two switches are forced to alternately conduct current in a complementary way such that the total number of inductors conducting current is alternately changed and the DC-DC power conversion is performed according to the selected topology.