US Patent 9991775 Constant on-time converter having fast transient response

The present disclosure provides a constant on-time converter having fast transient response, which adaptively adjusts an on-time and an off-time by a first compensation circuit and a second compensation circuit, to accordingly adjust an inductive current. When a load converts a light loading into a heavy loading, the constant on-time converter adaptively adjusts the on-time of the clock signal. When the load converts a heavy loading into a light loading, the constant on-time converter adaptively adjusts the off-time of the clock signal. Therefore, the output voltage can be adjusted rapidly in response to different load changes to enhance the transient response of the output voltage.