Patent ID: 8928305
Filing Date: 2015-01-06
Classification: H02M

Abstract:
1. A switching regulator circuit, comprising: an input port configured to receive a power source voltage; an output port configured to provide an output voltage and an output current; a reference ground connected to a package ground pin via a resistive component, wherein the reference ground has an average offset voltage with respect to the package ground pin, and wherein the average offset voltage is proportional to the output current with a first factor; a switch module having a first terminal coupled to the input port, a second terminal coupled to the output port, a third terminal coupled to the reference ground, and a fourth terminal configured to receive a control signal, wherein the switch module is configured to switch on and off periodically in response to the control signal to convert the power source voltage into the output voltage; a control module configured to receive a first signal indicative of the output voltage and a first reference signal indicative of a desired output voltage value, and configured to provide the control signal to the switch module based on the first signal and the first reference signal; and a reference compensation module configured to receive a second reference signal having a bandgap reference voltage with respect to the reference ground and a reference compensation signal proportional to the output current with a second factor, and configured to provide the first reference signal based on compensating the second reference signal with the reference compensation signal to substantially cancel out the average offset voltage from the first reference signal with respect to the ground pin.