System and method for controlling an error amplifier between control mode changes

An error amplifier circuit comprising:

• a first stage comprising a first current source;
• a second stage comprising a second current source and at least one compensation component that is connected to the first stage through a signal line;
• a first buffer circuit that is connected between the signal line and the at least one compensation component;
• a first switch circuit that is connected between the first buffer circuit and the at least one compensation component;
• a second buffer circuit that is connected between the second current source and the at least one compensation component;
• and
• a second switch circuit that is connected between the second buffer circuit and the at least one compensation component.

A method comprising the steps of:

• providing a first stage of an error amplifier circuit, the first stage comprising a first current source;
• providing a second stage of the error amplifier circuit, the second stage comprising a second current source and at least one compensation component that is connected to the first stage through a signal line, the at least one compensation component comprising a compensation resistor and a compensation capacitor connected in series;
• connecting a buffer circuit between the signal line and the at least one compensation component;
• and
• connecting a switch circuit between the buffer circuit and the at least one compensation component.

A direct current to direct current converter that comprises an error amplifier, the error amplifier comprising:

• a first stage comprising a first current source;
• a second stage comprising a second current source and at least one compensation component that is connected to the first stage through a signal line;
• a buffer circuit that is connected between the signal line and the at least one compensation component;
• and
• a switch circuit that is connected between the buffer circuit and the at least one compensation component;
• wherein the buffer circuit provides a first value of current to the at least one compensation component when the buffer circuit is connected to the at least one compensation component through the switch circuit, the first value of current larger than a second value of current that is provided to the at least one compensation component when the signal line is connected to the at least one compensation component through the switch circuit.