| 摘要 |
A switching regulator and controller and an electronic device using same are disclosed in which the controller includes a sense circuit, an error amplifier circuit, a filter and reference circuit, and a comparator circuit. The switching regulator includes a pulse switch circuit coupled to an output inductor for developing an output voltage. The sense circuit provides a sense signal indicative of current through the output inductor. The error amplifier circuit develops an error signal indicative of error of the output voltage. The filter and reference circuit high pass filters the sense signal to provide a filtered sense signal and which balances the filtered sense signal and the error signal at a common DC level. The comparator circuit develops a pulse control signal using the error signal and the filtered sense signal, where the pulse control signal is for controlling switching of the pulse switch circuit. |
