Patent ID: 8498134

Claim:
A voltage converter circuit for a clocked supply of energy to an energy storage based on an input voltage applied at an input of the voltage converter circuit, comprising: an energy storage; a switch arrangement, wherein the switch arrangement comprises a first switch and a second switch which are connected in parallel, wherein the switch arrangement is coupled to the energy storage, wherein the first switch comprises a turn-on voltage which is smaller, according to amount, than the second switch, wherein a control terminal of the first switch is wired up such that the first switch is active in a startup phase of the voltage converter circuit to supply energy to the energy storage, and wherein a control terminal of the second switch is wired up such that the second switch is active after the startup phase to supply energy to the energy storage in a clocked way; and a feedback circuit which is implemented to provide a feedback signal depending on a change of the energy stored in the energy storage or depending on an amount of energy stored in the energy storage, wherein the feedback circuit comprises a switchable coupling element which is implemented to couple the feedback signal to the control terminal of the second switch, wherein the switchable coupling element is implemented to provide a stronger coupling effect in a startup phase than after the startup phase.