DC to DC converter with pseudo constant switching frequency

A DC to DC converter comprising:

• a switch connected to a switching node to control a voltage of the switching node;
• and
• a switching controller that is adapted to turn on and off the switch at a substantially constant frequency based at least in part on the voltage of the switching node, wherein the switching controller includes:
• a modulator connected to a control electrode of the switch and that is adapted to actuate and deactuate the switch;
• and
• a first timer that is connected to the switching node and to the modulator, wherein the first timer uses the voltage of the switching node to determine an on-time for the switch, wherein the first timer further comprises:
• a comparator;
• a low pass filter connected between the switching node and a first input of the comparator;
• and
• a reference voltage generator that is connected to the modulator and a second input of the comparator.