Switching regulator and operating method
AssigneeSamsung Electronics Co., Ltd.
InventorsHyosang Youn, Minwoo Kim, Hyungju Park, Deokgi Lee, Changseok Chae
Life of this patent
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Abstract
A switching regulator generates an output voltage from an input voltage and includes; a charge sharing circuit that selectively forms one of a first charge sharing path between a first flying capacitor and a second bootstrap capacitor and a second charge sharing path between a second flying capacitor and a first bootstrap capacitor based on first and second conversion modes.
Claims26
A switching regulator that generates an output voltage from an input voltage, the switching regulator comprising:
- a first switching circuit including a first transistor that is connected to a first node receiving the input voltage in response to a first switching control signal in a boost mode;
- a second switching circuit including a second transistor that is connected to a second node outputting the output voltage in response to a second switching control signal in a buck mode;
- and
- a charge sharing circuit configured to form a second charge sharing path for boosting the first switching control signal in the boost mode and a first charge sharing path for boosting the second switching control signal in the buck mode.
A switching regulator that generates an output voltage from an input voltage, the switching regulator comprising:
- a first switching circuit including a first transistor, a first bootstrap capacitor, and a flying capacitor, wherein in a buck mode, the first transistor is configured to selectively connect a first node receiving the input voltage in response to a first switching control signal the input voltage;
- a second switching circuit including a second transistor and a second bootstrap capacitor, wherein in the buck mode, the second transistor is configured to selectively connect a second node outputting the output voltage in response to a second switching control signal;
- and
- a charge sharing circuit configured to form a charge sharing path between the flying capacitor and the second bootstrap capacitor, in the buck mode.
A switching regulator that generates an output voltage from an input voltage, the switching regulator comprising:
- a first switching circuit including a first transistor and a first bootstrap capacitor, wherein in a boost mode, the first transistor connects a first node receiving the input voltage in response to a first switching control signal, and the first bootstrap capacitor boosts the first switching control signal;
- a second switching circuit including a second transistor, a second bootstrap capacitor, and a flying capacitor, wherein in the boost mode, the second transistor is configured to selectively connect a second node outputting the output voltage in response to a second switching control signal;
- and
- a charge sharing circuit configured to form a charge sharing path between the flying capacitor and the first bootstrap capacitor, in the boost mode.
A switching regulator that generates an output voltage from an input voltage, the switching regulator comprising:
- a first switching circuit including a first transistor connected to a first node receiving the input voltage based on a first switching control signal;
- a second switching circuit including a second transistor connected to a second node outputting the output voltage based on a second switching control signal;
- a charge sharing circuit configured to control any one of a second charge sharing path for boosting the first switching control signal and a first charge sharing path for boosting the second switching control signal, based on a control signal;
- and
- a controller configured to generate the first switching control signal, the second switching control signal, and the control signal, based on a mode selected from a buck mode and a boost mode.
Dependencies are inferred from the claim text.