The invention relates to a method for regulating a light source (5) to which a DC-DC converter (11) supplies power. In said method, in which a control value is regulated by predefining a desired value for an operational parameter of the DC-DC converter, the following steps are carried out: the switching frequency of the DC-DC converter (11) is increased by a boosting value prior to quick changes of the desired value; a certain dwell time (tRZ) is allowed to pass; the new desired value is set; a total dwell time (t2) is allowed to pass; the switching frequency of the DC-DC converter (11) is reduced by the boosting value.