Error amplifier with programmable on-chip and off-chip compensation

A switching converter circuit, comprising:

• a pulse-width modulation (PWM) comparator;
• an error amplifier circuit coupled to an input of the PWM comparator, wherein the error amplifier circuit comprises:
• an error amplifier with a reference voltage input and with a feedback voltage input;
• an internal compensation circuit coupled to an output of the error amplifier, wherein the internal compensation circuit includes an internal compensation switch;
• a transconductance stage coupled to an output of the error amplifier;
• and
• an external compensation switch coupled between an output of the transconductance stage and the internal compensation switch;
• and
• an external compensation pad coupled to the external compensation switch and the output of the transconductance stage.

An error amplifier circuit, comprising:

• an error amplifier;
• a transconductance stage coupled to an output of the error amplifier;
• an internal compensation circuit coupled to an output of the error amplifier, wherein the internal compensation circuit comprises an internal compensation switch;
• an external compensation switch coupled to the internal compensation switch, wherein the error amplifier circuit is configured to selectively use one of internal compensation based on the internal compensation circuit and external compensation.