Patent ID: 7977929

Claim:
A method for regulating a voltage, comprising: comparing a feedback signal with a second reference signal to generate a second control signal and amplifying a difference between the feedback signal and a first reference signal to generate a first control signal; in response to the feedback signal being greater than the first reference signal: generating the first control signal at an output of a transconductance amplifier, the first control signal having a first value; and using the first control signal to discharge an energy storage element; in response to the feedback signal being greater than the second reference signal: generating the second control signal at an output of a comparator, the second control signal having a first signal level; and using the second control signal at the first signal level to couple a third control signal to a pulse width modulation circuit, the third control signal having a substantially constant voltage; in response to the feedback signal being less than the first reference signal: generating the first control signal at the output of the transconductance amplifier to have a second value; and using the first control signal at the second value to charge the energy storage element; in response to the feedback signal being less than the second reference signal: generating the second control signal at the output of the comparator, the second control signal at a second signal level; and using the second control signal at the second signal level to decouple the third control signal from the input of the pulse width modulation circuit.