Patent ID: 7508181
Filing Date: 2009-03-24
Classification: H02M

Abstract:
1. A switching regulator capable of compensating output errors comprising: a power stage, the power stage comprising: an output capacitor coupled to the output inductor with an output voltage across the capacitor; a reference voltage generator used for generating a reference voltage; a comparator having a first input end coupled to the output inductor and the output capacitor and a second input end, the comparator used for comparing signals received by these two input ends; a constant-time trigger coupled between an output end of the comparator and a control end of the power stage, the constant-time trigger used for controlling turning on and off the first switch and the second switch of the power stage according to a result of the comparator; an error amplifier having a first input end coupled to the output inductor and the output capacitor for receiving the output voltage, and a second input end coupled to the reference voltage generator for receiving the reference voltage, the error amplifier used for generating a compensation signal according to signals received by these two input ends; and an operator having a first input end coupled to the reference voltage generator for receiving the reference voltage, a second input end coupled to an output end of the error amplifier for receiving the compensation signal, and an output end coupled to the second input end of the comparator, the operator used for generating a compensation reference voltage according to the reference voltage and the compensation signal.