Patent ID: 7667526

Claim:
An apparatus comprising: a pin to receive information; a select circuit responsive to the information received at the pin to select a selected burst switching frequency from multiple selectable burst switching frequencies based on a value of the information received at the pin, wherein the pin is configured to couple to resistors that form a voltage divider, and the value of the information received at the pin is based on values of the resistors, wherein the select circuit includes a generator to generate a plurality of first selectable signals having frequencies corresponding to the multiple selectable frequencies, a comparator to compare the information received at the pin with a voltage to produce a comparison result, and an election unit responsive to the comparison result to select one of the first selectable signals to be a selected signal, and wherein the selected burst switching frequency corresponds to the frequency of the selected signal; a drive circuit to provide a signal to switch a switch to transfer power from an input node to an output node during a normal mode and a burst mode; and a control circuit coupled to the select circuit and the drive circuit to enable the drive circuit to switch the switch at the selected burst switching frequency during the burst mode.