A driver circuit which is configured to generate a drive voltage for a load from an input voltage, wherein the driver circuit comprises - a power converter network comprising an inductor which is coupled to the input voltage; - a power transistor having a high voltage terminal which is coupled to the inductor and having a low voltage terminal; - a controller; and - a supply voltage capacitor for providing a logic supply voltage to the controller, characterised in that - the controller comprises a control transistor which is configured to couple the low voltage terminal of the power transistor directly to a low voltage potential or to decouple the low voltage terminal from the low voltage potential, in order to put the power transistor to a conduction-state or an off-state, respectively; - the controller comprises a charging transistor, arranged in parallel to the control transistor, and configured to couple or to decouple the low voltage terminal of the power transistor to the supply voltage capacitor, in order to put the power transistor to the conduction-state or off-state, respectively; and - the controller is configured to put the power transistor to the conduction-state using the charging transistor within a first time interval, and to put the power transistor to the conduction-state using the control transistor within a second time interval. - a power converter network comprising an inductor which is coupled to the input voltage; - a power transistor having a high voltage terminal which is coupled to the inductor and having a low voltage terminal; - a controller; and - a supply voltage capacitor for providing a logic supply voltage to the controller, characterised in that - the controller comprises a control transistor which is configured to couple the low voltage terminal of the power transistor directly to a low voltage potential or to decouple the low voltage terminal from the low voltage potential, in order to put the power transistor to a conduction-state or an off-state, respectively; - the controller comprises a charging transistor, arranged in parallel to the control transistor, and configured to couple or to decouple the low voltage terminal of the power transistor to the supply voltage capacitor, in order to put the power transistor to the conduction-state or off-state, respectively; and - the controller is configured to put the power transistor to the conduction-state using the charging transistor within a first time interval, and to put the power transistor to the conduction-state using the control transistor within a second time interval. - the controller comprises a control transistor which is configured to couple the low voltage terminal of the power transistor directly to a low voltage potential or to decouple the low voltage terminal from the low voltage potential, in order to put the power transistor to a conduction-state or an off-state, respectively; - the controller comprises a charging transistor, arranged in parallel to the control transistor, and configured to couple or to decouple the low voltage terminal of the power transistor to the supply voltage capacitor, in order to put the power transistor to the conduction-state or off-state, respectively; and - the controller is configured to put the power transistor to the conduction-state using the charging transistor within a first time interval, and to put the power transistor to the conduction-state using the control transistor within a second time interval.