Patent attributes
A buck-boost regulator for converting an input voltage to an output voltage which includes an inductor, an error circuit providing an error voltage, buck and boost switching circuits, buck and boost ripple circuits, and buck and boost hysteretic comparator circuits. The buck switching circuit switches a first end of the inductor, the buck ripple circuit replicates ripple current through the inductor based on the buck pulse signal and provides a buck ripple voltage, and the buck hysteretic comparator circuit develops the buck pulse signal based on a buck window voltage range using the error voltage. The boost switching circuit switches a second end of the inductor, the boost ripple circuit replicates ripple current through the inductor based on the boost pulse signal and provides a boost ripple voltage, and the boost hysteretic comparator circuit develops the boost pulse signal based on a boost window voltage range using the error voltage.
