Patent ID: 8587268
Filing Date: 2013-11-19
Classification: H02M

Abstract:
1. A buck regulator circuit for providing buck regulation to supply a regulated load current to a load, the buck regulator circuit operable with a buck inductor coupled to the buck regulator at a switch node and to the load at an output node, the buck regulator circuit comprising: a switcher circuit operable to provide buck regulation and supply an inductor current through the buck inductor to the load; and an analog bypass (ACB) circuit including: wherein the switcher circuit and the buck inductor are characterized by a switcher/inductor drop out resistance, and the ACB current source is characterized by an ACB resistance, such that a regulator drop out resistance at the output node corresponds to the switcher/inductor drop out resistance in parallel with the ACB resistance, which is less than the switcher/inductor drop out resistance; and wherein the ACB control circuit includes: