A power converter configured to convert an input voltage at an input of the power converter into an output voltage at an output of the power converter, wherein the power converter comprises - a DC-to-DC converter comprising a high side switch; - a bypass transistor parallel to the DC-to-DC converter, configured to couple a load at the output of the power converter to the input voltage during an on-state of the bypass transistor; - current sensing means configured to sense a current through the high side switch; - a voltage error detection unit configured to determine an error voltage based on the output voltage and a reference voltage; - a saw wave signal generation unit configured to generate a saw wave signal at a cycle rate of the DC-to-DC converter; - adding means configured to determine a feedback voltage by overlaying the saw wave signal and a voltage derived from the sensed current; - a peak detector configured to determine a peak voltage from the feedback voltage, such that the peak voltage takes on a maximum value of the feedback voltage within a predetermined preceding time interval; - a difference unit configured to compare the error voltage with the peak voltage, to provide an output of the difference unit which indicates a situation where the DC-to-DC converter cannot provide sufficient current to the load at the output of the power converter to maintain a desired output voltage; and - a bypass control and driver unit which is coupled to the output of the difference unit; wherein the bypass control and driver unit is configured to apply a drive signal to a gate of the bypass transistor to turn on the bypass transistor, based on the output of the difference unit; wherein, if the bypass transistor is turned on, a current through the bypass transistor is provided to the load at the output of the power converter in addition to the current provided by the DC-to-DC converter. - a DC-to-DC converter comprising a high side switch; - a bypass transistor parallel to the DC-to-DC converter, configured to couple a load at the output of the power converter to the input voltage during an on-state of the bypass transistor; - current sensing means configured to sense a current through the high side switch; - a voltage error detection unit configured to determine an error voltage based on the output voltage and a reference voltage; - a saw wave signal generation unit configured to generate a saw wave signal at a cycle rate of the DC-to-DC converter; - adding means configured to determine a feedback voltage by overlaying the saw wave signal and a voltage derived from the sensed current; - a peak detector configured to determine a peak voltage from the feedback voltage, such that the peak voltage takes on a maximum value of the feedback voltage within a predetermined preceding time interval; - a difference unit configured to compare the error voltage with the peak voltage, to provide an output of the difference unit which indicates a situation where the DC-to-DC converter cannot provide sufficient current to the load at the output of the power converter to maintain a desired output voltage; and - a bypass control and driver unit which is coupled to the output of the difference unit; wherein the bypass control and driver unit is configured to apply a drive signal to a gate of the bypass transistor to turn on the bypass transistor, based on the output of the difference unit; wherein, if the bypass transistor is turned on, a current through the bypass transistor is provided to the load at the output of the power converter in addition to the current provided by the DC-to-DC converter.