The invention relates to a control device for regulating a multiphase dc-dc converter having at least one first converter branch and one second converter branch connected in parallel to the first converter branch. The control device comprises a switching signal generation device that is designed to determine measurement values for the current in the converter branches, to compare, for a first of the converter branches, the determined measurement value of the current in the first converter branch to a first upper threshold current value and a first lower threshold current value and, on the basis of the comparisons, to generate a first control signal for switching devices of the first converter branch, and for a second of the converter branches, to compare the determined measurement value of the current in the second converter branch to a second upper threshold current value and a second lower threshold current value and, on the basis of the comparisons, to generate a second control signal for switching devices of the second converter branch. The control device further comprises a threshold value generator, which is coupled to the switching signal generation device and is designed to generate upper and lower threshold current values for the switching signal generation device, to determine an actual current phase offset of the control signals for the switching devices in the first and second converter branches, and on the basis of the determined phase offset, to temporarily modify the second upper current threshold value and/or the second lower current threshold value.