A voltage regulat ng device comprising • a power stage comprising an inductor between a first node (P 1) and a second node (P 2); a first switch between the first node (P 1) and a power supply node (P 3) for which the potential (V bat) is non-zero and of constant polarity; a first capacitor (C neg) between a node (P 5) at a reference potential and a second switch coupled to the first node (P 1); a second capacitor (C pos) between a node (P 7) at the reference potential and a third switch coupled to the second node (P 2); a fourth switch between the second node (P 2) and a node (P 8) at the reference potential; a fifth switch between the first node (P 1) and a node (P 9) at the reference potential; a first output (P 4) for delivering a first voltage corresponding to the voltage at the terminals of the first capacitor (C neg); a second output (P 6) for delivering a second voltage corresponding to the voltage at the terminals of the second capacitor (C pos); the power stage being arranged to adopt one of the following configurations as a function of the control signals: a first configuration (C 1, Fig.3a) in which only the first and the third switches are closed; a second configuration (C 2, Fig.3b) in which only the first and the fourth switches are closed; a third configuration (C 3, Fig.3c) in which only the second and the fourth switches are closed; a fourth configuration (C 4, Fig.3d) in which only the third and the fifth switches are closed; and • a control circuit for synchronizing and controlling the switches (34, 38) in order to apply a given control strategy, the control circuit being coupled to the power stage and being able to produce error signals (V err1, V rr2) as a function of the difference between the reference potential and the first and second voltages, and to generate the control signals, characterized in that the control circuit comprises a first subtractor able to calculate a first comparison signal representing the result of the difference between the first voltage and the second voltage; said control circuit comprising a second subtractor arranged to calculate a second comparison signal representing the result of the sum of the second voltage and the first voltage, and wherein the first comparison signal is compared with a reference potential (ref) to produce a first one (Verr1) of the error signals, and the second comparison signal is compared with said reference potential to produce a second one (Verr2) of the error signals. • a power stage comprising an inductor between a first node (P 1) and a second node (P 2); a first switch between the first node (P 1) and a power supply node (P 3) for which the potential (V bat) is non-zero and of constant polarity; a first capacitor (C neg) between a node (P 5) at a reference potential and a second switch coupled to the first node (P 1); a second capacitor (C pos) between a node (P 7) at the reference potential and a third switch coupled to the second node (P 2); a fourth switch between the second node (P 2) and a node (P 8) at the reference potential; a fifth switch between the first node (P 1) and a node (P 9) at the reference potential; a first output (P 4) for delivering a first voltage corresponding to the voltage at the terminals of the first capacitor (C neg); a second output (P 6) for delivering a second voltage corresponding to the voltage at the terminals of the second capacitor (C pos); the power stage being arranged to adopt one of the following configurations as a function of the control signals: a first configuration (C 1, Fig.3a) in which only the first and the third switches are closed; a second configuration (C 2, Fig.3b) in which only the first and the fourth switches are closed; a third configuration (C 3, Fig.3c) in which only the second and the fourth switches are closed; a fourth configuration (C 4, Fig.3d) in which only the third and the fifth switches are closed; and • a control circuit for synchronizing and controlling the switches (34, 38) in order to apply a given control strategy, the control circuit being coupled to the power stage and being able to produce error signals (V err1, V rr2) as a function of the difference between the reference potential and the first and second voltages, and to generate the control signals,