Abstract: The present invention provides a switching converter with pulse skipping mode. The switching converter comprises a switching circuit having at least one switch, a controller and a feedback circuit. The controller comprises an error amplifying circuit, a logic circuit, a ramp signal generator and a pulse skipping circuit. The error amplifying circuit generates a compensation signal based on comparing the feedback signal with a reference signal. The logic circuit generates a control signal to control the ON and OFF switching of the at least one switch based on the compensation signal. The ramp signal generator generates a ramp signal. The pulse skipping circuit generates a pulse skipping signal based on the compensation signal, the ramp signal and a threshold voltage. The logic circuit skips one or more switching pulses of the control signal in accordance with the pulse skipping signal.

Abstract: The present application discloses a control circuit of a switching power converter, wherein the switching power converter comprises a power switch, and is configured to convert an input voltage into an output voltage, the control circuit comprises: a first time generating circuit configured to generate a first time signal; a phase lock circuit configured to generate a second time signal; and a switching signal generating circuit configured to generate a switching signal to control the ON and OFF switching of the power switch. The phase lock circuit generates the second time signal in accordance with the frequency difference between the switching signal and a reference clock signal, so as to get the frequency of the switching signal to be substantially equal to the frequency of the reference clock signal.

Abstract: A constant ON-time converter is disclosed. The constant ON-time converter comprises a feedback circuit, a slope compensation circuit and a buffer circuit. The feedback signal comprises an output configured to provide a feedback signal indicating an output voltage of the constant ON-time converter. The slope compensation circuit comprises an output configured to provide a slope compensation signal. The buffer circuit is coupled between the output of the feedback circuit and the output of the slope compensation circuit to avoid the feedback signal and the output voltage of the constant ON-time converter is influenced by the slope compensation signal.

Abstract: A sample and hold circuit and the method thereof are disclosed. The sample and hold circuit may be applied in voltage regulators or other circuits. The sample and hold circuit comprises: an input terminal configured to receive an input signal; an output terminal configured to provide an output signal; a control circuit configured to receive the input signal and the output signal, and wherein based on the input signal and the output signal, the control circuit generates a digital signal, and wherein the digital signal increases when the output signal is lower than the input signal, and maintains when the output signal is larger than or equal to the input signal; a digital-to-analog converter (DAC) configured to convert the digital signal to the output signal.

Abstract: In one embodiment, a switch mode power supply comprising a switch and a control circuit is disclosed. The control circuit may comprise a multi-function pin configured to receive a first current sampling signal and a first voltage sampling signal. A first comparing signal may be provided by comparing the first voltage sampling signal with a first threshold signal when the switch is turned OFF, and a second comparing signal may be provided by comparing the first current sampling signal with a second threshold signal when the switch is turned ON. The control circuit may be configured to control the switch in accordance with the first comparing signal and the second comparing signal.

Abstract: A DC-DC converter includes a switching stage and a control circuit coupled to provide an accurate current limit for peak current mode for the DC-DC converter. The control circuit is operative to provide a peak value of the peak current mode.

Abstract: A wireless system includes a radio and a voltage regulator, which provides a supply voltage to the radio. The voltage regulator includes a storage element, at least one switch that is coupled to the storage element and a controller. The controller operates the voltage regulator in a continuous mode of operation, operates the voltage regulator in a discontinuous mode of operation in response to an output current of the voltage regulator decreasing below a predetermined threshold; operates the switch(es) to energize the storage element in response to a detection of whether an output voltage is below a threshold level; operates the switch(es) to halt the energization of the storage element in response to detecting a current in the storage element reaching a predetermined current threshold; operates the switch(es) to energize and de-energize the storage element in the discontinuous mode of operation; and operates the switch(es) to energize the storage element in synchronization with a periodic clock signal.

Abstract: A voltage converter includes an input circuit that is designed to receive an input voltage. The voltage converter includes a switch circuit comprising a pair of switches that receive the input voltage through the input circuit. The voltage converter includes an output circuit configured to supply current at a regulated voltage. The voltage converter includes a feedback circuit that generates a feedback signal. The voltage converter includes a switch control circuit that generates a switch control signal during an operational mode of circuit operation. The voltage converter includes an idle mode control circuit that generates an idle mode control signal during the operational mode and causes the switch circuit to turn off one of the switches for a period of time. The voltage converter includes a switch turn-off circuit that generates a second control signal, which causes the switch circuit to turn off the other switch.

Abstract: A system includes a sampler to sample an input voltage and a switching regulator. The switching regulator is adapted to regulate a switching operation of the regulator in response to the sampling by the sampler.

Abstract: The present invention discloses an accurate current limit for peak current mode DC-DC converters by detecting the peak value of the slope compensation.

Abstract: A wireless system includes a radio and a voltage regulator, which provides a supply voltage to the radio. The voltage regulator includes a storage element, at least one switch that is coupled to the storage element and a controller. The controller operates the voltage regulator in a continuous mode of operation, operates the voltage regulator in a discontinuous mode of operation in response to an output current of the voltage regulator decreasing below a predetermined threshold; operates the switch(es) to energize the storage element in response to a detection of whether an output voltage is below a threshold level; operates the switch(es) to halt the energization of the storage element in response to detecting a current in the storage element reaching a predetermined current threshold; operates the switch(es) to energize and de-energize the storage element in the discontinuous mode of operation; and operates the switch(es) to energize the storage element in synchronization with a periodic clock signal.

Abstract: A technique includes energizing a storage element of a voltage regulator in response to the detection of an output voltage of the voltage regulator falling below a threshold level. The technique includes halting the energization of the storage element in response to the detection of a current in the storage element reaching a predetermined threshold.

Abstract: A switching regulator circuit includes a switching circuit that may be configured to alternately apply a supply voltage and a reference voltage to an inductor coupled between a first node and an output node. The switching regulator circuit also includes a switch such as a transistor, for example, that is coupled across the inductor. The switch may shunt the inductor when the current in the inductor reaches a predetermined current level.

Abstract: A system includes a sampler to sample an input voltage and a switching regulator. The switching regulator is adapted to regulate a switching operation of the regulator in response to the sampling by the sampler.

Abstract: A system includes a sampler to sample an input voltage and a switching regulator. The switching regulator is adapted to regulate a switching operation of the regulator in response to the sampling by the sampler.

Abstract: An undervoltage detection circuit includes a first transistor and a second transistor coupled to a supply voltage node and arranged to form a current mirror. The undervoltage detection circuit also includes a first bipolar transistor and a second bipolar transistor. A collector of the first bipolar transistor is coupled to the first transistor, and an emitter of the first bipolar transistor is coupled to a reference voltage node. A collector of the second bipolar transistor is coupled to the second transistor and an emitter of the second bipolar transistor is coupled to the reference voltage node through a first resistor. The undervoltage detection circuit further includes a third transistor coupled through a second resistor to an input voltage node. An output signal indicative of an input voltage is derived from a voltage established at the collector of the second bipolar transistor.

Abstract: A regulator circuit includes a first transistor coupled to a supply voltage and a second transistor coupled between the first transistor and an output node. The regulator circuit also includes a dynamic bias circuit that may selectively provide a bias voltage to a gate of the second transistor. During a first mode such as a low power mode, for example, the bias circuit may provide the bias voltage at a fixed percentage of the supply voltage as the supply voltage varies. In addition, during a second mode such as a high power mode, for example, the bias circuit may provide the bias voltage at a fixed offset from the supply voltage as the supply voltage varies.

Abstract: A switching regulator circuit includes a switching circuit that may be configured to alternately apply a supply voltage and a reference voltage to an inductor coupled between a first node and an output node. The switching regulator circuit also includes a switch such as a transistor, for example, that is coupled across the inductor. The switch may shunt the inductor when the current in the inductor reaches a predetermined current level.

Abstract: An amplifier includes a first amplifier stage, a second amplifier stage and an output stage. The output stage is driven in response to a first signal and a second signal to provide an output signal. The first amplifier stage provides the first signal in response to an indication of the second signal and a first component of a differential input signal. The second amplifier stage provides the second signal in response to an indication of the first signal and a second component of the differential input signal.

Abstract: A system includes a sampler to sample an input voltage and a switching regulator. The switching regulator is adapted to regulate a switching operation of the regulator in response to the sampling by the sampler.