Patent ID: 7863872

Claim:
A buck-boost switching regulator comprising: (1) a first loop including: a first and a second switch electrically connected with each other, the first switch having an end electrically connected with an input voltage, and the second switch having an end electrically connected with ground; and a first control circuit controlling the operation of the first and the second switch; (2) a second loop including: a third and a fourth switch electrically connected with each other, the third switch having an end electrically connected with ground, and the fourth switch having an end electrically connected with an output voltage; and a second control circuit controlling the operation of the third and the fourth switch; and (3) an inductor electrically connected between a node between the first and the second switch, and a node between the third and the fourth switch; wherein the first loop includes a first error amplifier which compares a first feedback voltage obtained from the output voltage with a first reference voltage; wherein the second loop includes a second error amplifier which compares the first feedback voltage obtained from the output voltage with a second reference voltage.