Patent ID: 6754086
Filing Date: 2004-06-22
Classification: G06F,H01L,H01R,H02M,H05K

Abstract:
A synchronous voltage regulation circuit, comprising:an input inductor having an input inductor first terminal coupled to an input signal and an input inductor second terminal; a first switch, having a first switch first terminal coupled to the input inductor second terminal, a first switch second terminal, and a first switch control terminal coupled to a control signal; a second switch, having a second switch first terminal coupled to the first switch second terminal, a second switch second terminal coupled to ground, and a second switch control terminal; an output inductor magnetically coupled to the input inductor according to a first coupling coefficient loosely coupled, the output inductor having an output inductor first terminal coupled to the second switch first terminal, and an output inductor second terminal coupled to an output signal; an auxiliary inductor having a first auxiliary inductor terminal coupled to ground via a first capacitor and a second auxiliary inductor terminal coupled to the second switch control terminal via a resistor, wherein the auxiliary inductor is magnetically coupled to the input inductor according to a second coupling coefficient higher than the first coupling coefficient; and a third switch, having a third switch first terminal coupled to the second switch control terminal, a control terminal coupled to the control signal.