Patent ID: 8362756

Claim:
A system comprising: a controller to produce high-side and low-side control signals; a power stage including a power stage output capacitor, the high and low-side signals being used to switch high-side and low-side transistors in the power stage to control the voltage across the power stage output capacitor of the power stage; and a boost feedback charge pump including a charge pump output capacitor, the boost feedback charge pump receiving the low-side or high-side signal to increase the charge on the charge pump output capacitor; wherein the controller is configured to send Pulse Frequency Modulation (PFM) high and low-side signals that controls the voltage on the power stage output capacitor and charges the charge pump output capacitor and configured to send Boost Feedback (BFB) high and low-side signals that charge the boost feedback capacitor, but are designed to not significantly change the charge on the power stage output capacitor.