Combination of linear and adaptive non-linear control for fast transient response

A method for fast transient response during transient periods comprising the step of:

• receiving a load voltage;
• generating a linear output during steady state operation for stability;
• comparing the load voltage to a reference voltage to detect a transient period;
• and
• generating a non-linear output signal during the detected transient period transient operation comprising the steps of:
• summing the non-linear signal with the linear output by a first one shot circuit when the load voltage is less than the reference voltage, wherein only a first pulse of the step up non-linear signal is summed with the linear output during step up transient periods, wherein only a first pulse of the non-linear signal is summed with the linear output during step up transient periods;
• and
• subtracting the non-linear output signal from the linear output when the load voltage is greater than the reference voltage, wherein only a first pulse of the non-linear signal is subtracted from the linear output during step down transient periods, wherein the combination linear and non-linear control provides stability and reduces delay times for fast transient response.

A system for fast transient response comprising:

• a linear control compensation network for receiving a load voltage and generating a linear output during steady state operation for stability;
• a step up non-linear control circuit for comparing the load voltage to a step up reference voltage and generating a step up non-linear signal when the load voltage is less than the step up reference voltage fast transient response during step up load;
• a step down non-linear control circuit for comparing the load voltage to a step down reference voltage and generating a step down non-linear signal when the load voltage is greater than the step up reference voltage for fast transient response during step down load;
• and
• an error amplifier and pulse width modulator for comparing the load voltage to a reference voltage to detect a transient period and summing the step up signal with the linear output by a first one shot circuit, wherein only a first pulse of the step up non-linear signal is summed with the linear output during step up transient periods and subtracting the step down non-linear signal from the linear output by a second one shot circuit, wherein only a first pulse of the step down non-linear signal is subtracted from the linear output during step down transient periods, wherein the controller reduces response delay time for fast transient response.

A method for fast transient response during transient periods comprising the step of:

• receiving a load voltage;
• generating a linear output during steady state operation for stability;
• comparing the load voltage to a reference voltage to detect a transient period comprising the steps of:
• comparing the load voltage to a step up reference voltage;
• generating a step up non-linear signal when the load voltage is less than the step up reference voltage;
• summing the step up signal with the linear output by a first one shot circuit, wherein only a first pulse of the step up non-linear signal is summed with the linear output during step up transient periods;
• comparing the load voltage to a step down reference voltage;
• generating a step down non-linear signal when the load voltage is greater than the step down reference voltage;
• and
• subtracting the step down non-linear signal from the linear output by a second one shot circuit, wherein only a first pulse of the step down non-linear signal is subtracted from the linear output during step down transient periods;
• and
• generating a non-linear output signal during the detected transient period transient operation, wherein the combination linear and non-linear control provides stability and reduces delay times for fast transient response.