Patent ID: 7170264

Claim:
A compensation circuit in a monolithic switching regulator controller being incorporated in a closed loop feedback system of a switching regulator, the switching regulator controller including an input terminal receiving an input voltage, an output terminal providing a switching output voltage corresponding to a regulated output voltage, a feedback terminal for receiving a feedback voltage corresponding to the regulated output voltage, and an error amplifier comparing a signal indicative of the feedback voltage and a reference voltage and generating an error output voltage, the compensation circuit comprising: an amplifier including a non-inverting input terminal coupled to the feedback terminal for receiving the feedback voltage, an inverting input terminal coupled to a first terminal of the switching regulator controller, and an output terminal; a first resistor connected between the inverting input terminal and the output terminal of the amplifier; a second resistor connected between the output terminal of the amplifier and a first input terminal of the error amplifier, the first input terminal receiving the signal indicative of the feedback voltage; and a first capacitor and a third resistor connected in series between the first input terminal and an output terminal of the error amplifier, the output terminal of the error amplifier providing the error output voltage, wherein the first capacitor and the third resistor operate to introduce a first zero in the closed loop feedback system.