Patent ID: 8476886

Claim:
A hysteretic DC-DC converter comprising: a reference circuit configured to generate a reference signal; a hysteretic comparator having a first differential amplifier and a second differential amplifier, the hysteretic comparator being configured to compare a monitored output signal to the reference signal using the first differential amplifier to generate a first difference signal and to compare a load ground to a reference signal ground using the second differential amplifier to generate a second difference signal, the hysteretic comparator being further configured to add the first difference signal to the second difference signal and to generate an output signal based on the addition of the first difference signal and the second difference signal, the output signal being indicative of an output of the converter provided to a load, the load ground being a ground reference of the load and the reference signal ground being a ground reference of the reference signal; and a control circuit configured to maintain the output of the converter provided to the load within regulation based on the output signal of the hysteretic comparator.