NOVELTY - The device (5) has a regulating unit (7) connected to a control unit (6') that controls a reversible direct current to direct current converter assembly (9') i.e. multiphase interleaved boost converter assembly. The regulating unit selects a preset functional mode among a set of possible functional modes of the assembly or a forced functional mode, based on occurrence of triggering signal (Tg) of the forced mode. The regulating unit communicates the selected mode with the control unit. The assembly has current converters (11'-13') that are electrically mounted in parallel.    USE - Electronic device for regulating voltage and current of an electrical architecture comprising a main electric energy storage e.g. very low voltage or low voltage electrochemical battery, of a vehicle e.g. motor vehicle (claimed) such as hybrid motor vehicle.    ADVANTAGE - The configuration of the regulating unit enables recharging the main electric energy storage of the electrical architecture in case of deceleration of the vehicle, with high and low recharging current. The direct current to direct current converter assembly is reversible so as to authorize large number of functional modes of the assembly, thus authorizing the controlling or regulating of the voltage and current of the electrical architecture of the vehicle. The current converters are electrically mounted in parallel so as to obtain high electric power of the device. The configuration of the device enables maintaining the voltage of an electric consumer unit of an on-board electrical network of the vehicle during starting and restarting of the vehicle comprising an engine having automatic start and stop function. The configuration of the device enables better management of utilization and recharging of the main storage to improve the service life of the main storage, reducing the capacity of the main storage and limiting stress on the consumer unit of the on-board electrical network of the vehicle to improve the service life of the consumer unit. The configuration of the device enables attaining high gain of carbondioxide of 60 g, on an urban rolling cycle during customer usage.    DETAILED DESCRIPTION - The control unit is formed of a driver of a metal oxide semiconductor (MOS) transistor. An INDEPENDENT CLAIM is also included for a vehicle comprising an electrical architecture.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of an electrical architecture, of a vehicle, comprising an electronic device.    Triggering signal (Tg)    Electronic device (5)    Control units (6, 6')    Regulating unit (7)    Reversible direct current to direct current converter assembly (9')    Current converters (11'-13')