Switching regulator having high speed response
AssigneeRicoh Company, Ltd.
InventorJunji Nishida
Life of this patent
Estimating the term…
Abstract
A step-down switching regulator that converts an input voltage to a predetermined lower voltage than the input voltage for output as an output voltage which includes a first switch, an inductor, a second switch, a controller and a detector to detect a proportional voltage of the output voltage and output detection results to the controller when the proportional voltage exceeds a first predetermined reference voltage, or falls below a second predetermined reference voltage which is lower than the first predetermined reference voltage. The controller shuts the first switch off when the proportional voltage exceeds the first predetermined reference voltage and shuts the second switch off when the proportional voltage falls below the second predetermined reference voltage.
Claims17
A step-down switching regulator comprising:
- a first switch configured to switch in accordance with a first control signal;
- an inductor configured to store charge from an input voltage based on the first switch;
- a second switch configured to discharge the charge stored in the inductor in accordance with a second control signal;
- a controller configured to generate a proportional voltage based on an output voltage and to control the first and second switches so as to make the proportional voltage similar to a predetermined main reference voltage;
- and
- a detector configured to detect a change of the proportional voltage and output detection results to the controller when the proportional voltage exceeds a first predetermined reference voltage;
- or falls below a second predetermined reference voltage that is lower than the first predetermined reference voltage,
- wherein the controller shuts the first switch off when the proportional voltage exceeds the first predetermined reference voltage and shuts the second switch off when the proportional voltage falls below the second predetermined reference voltage.
A step-up switching regulator comprising:
- a first switch configured to switch in accordance with a first control signal;
- an inductor configured to store charge from an input voltage based on the first switch;
- a second switch configured to discharge the charge stored in the inductor in accordance with a second control signal;
- a controller configured to generate a proportional voltage based on an output voltage and to control the first and second switches so as to make the proportional voltage similar to a predetermined main reference voltage;
- and
- a detector configured to detect the proportional voltage and output detection results to the controller when the proportional voltage exceeds a first predetermined reference voltage,
- wherein the controller shuts the first switch off in accordance with a detection signal from the detector.
Dependencies are inferred from the claim text.