Switching regulator
AssigneeRealtek Semiconductor Corp.
InventorsPao-Cheng Chiu, Chieh-Min Feng, Ming-Han Lee
Life of this patent
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Abstract
A switching regulator includes a reference voltage generator and a switching-regulating module. The reference voltage generator receives a digital control signal and generates a reference voltage according to the digital control signal. The switching-regulating module is connected to the reference voltage generator and generates an output voltage according to the reference voltage. The value of the digital control signal is gradually increased to make the reference voltage being gradually increased at the initial stage of the activation of the switching regulator.
Claims14
A switching regulator, comprising:
- a reference voltage generator for receiving a digital control signal and generating a reference voltage according to the digital control signal;
- and
- a switching-regulating module connected to the reference voltage generator for generating am output voltage according to the reference voltage;
- wherein the digital control signal is generated by a logic control unit, and the logic control unit comprising:
- a counter for receiving a counting clock and generating a counting value used as the digital control signal:
- a comparator for comparing the counting value and a preset value to generate a comparison signal;
- and
- a logic gate for receiving a reference clock and the comparison signal and generating the counting clock.
A switching regulator, comprising:
- a logic control unit for generating a digital control signal;
- a digital-to-analog converter for receiving the digital control signal and generating a reference voltage;
- and
- a switching-regulating module connected to the digital-to-analog converter for generating an output voltage according to the reference voltage;
- wherein the logic control unit comprising:
- a counter for receiving a counting clock and generating a counting value used as the digital control signal;
- a comparator for comparing the counting value and a preset value to generate a comparison signal;
- and
- a logic gate for receiving a reference clock and the comparison signal and generating the counting clock;
- wherein the level of the counting clock is fixed when the counting value is larger than the preset value.
A reference voltage generator for outputting a reference voltage to a switching-regulating module, comprising:
- a logic control unit for generating a digital control signal;
- and
- a digital-to-analog converter connected to the logic control unit for generating the reference voltage according to the digital control signal;
- wherein the logic control unit comprises:
- a counter for receiving a counting clock and generating a counting value used as the digital control signal;
- a comparator for comparing the counting value and a preset value to generate a comparison signal;
- and
- a logic gate for receiving a reference clock and the comparison signal and generating the counting clock;
- wherein the level of the counting clock is fixed when the counting value is larger than the preset value.
A reference voltage generator for outputting a reference voltage to a switching-regulating module, comprising:
- a logic control unit for generating a digital control signal;
- a digital-to-analog converter connected to the logic control unit for generating the reference voltage according to the digital control signal;
- wherein the digital-to-analog converter comprises, a current source, and a variable resistor module, and the resistance of the variable resistor module is adjusted according to the digital signal;
- and
- wherein the digital control signal is generated by said logic control unit, and the logic control unit comprising:
- a counter for receiving a counting clock and generating a counting value used as the digital control signal;
- a comparator for comparing the counting value and a preset value to generate a comparison signal;
- and
- a logic gate for receiving a reference clock and the comparison signal and generating the counting clock.
Dependencies are inferred from the claim text.