A DC-to-DC voltage regulator circuit comprising: an output node; a pull-up switch and a pull-down switch with an output node coupled between them; a reactive circuit element coupled to the output node; a pull-up setting voltage circuit coupled to provide a pull-up setting voltage that is a function of a voltage at the output node; a pull-down setting voltage circuit coupled to provide a pull-down setting voltage that is a function of the voltage at the output node; a first comparator coupled to cause the pull-up switch to transition between open switch state and its closed switch state based upon a comparison of the pull-up setting voltage and a control voltage; and a second comparator coupled to cause the pull-down switch to transition between its open switch state and its closed switch state.