A circuit has a variable output that changes an output of a fixed input inversion amplification circuit, which includes a first operation amplifier with one input terminal that is applied with a fixed input value. The circuit includes an intermediate inversion amplification circuit having a second operation amplifier with an output terminal that is connected to another input terminal of the operation amplifier included in the fixed input inversion amplification circuit. One input terminal of the second operation amplifier is applied with the same input value as the fixed input value applied to the one input terminal of the first operation amplifier. Another input terminal of the second operation amplifier is applied with a variable input corresponding to an output of the first operation amplifier.

A circuit has a variable output that changes an output of a fixed input inversion amplification circuit, which includes a first operation amplifier with one input terminal that is applied with a fixed input value. The circuit includes an intermediate inversion amplification circuit having a second operation amplifier with an output terminal that is connected to another input terminal of the operation amplifier included in the fixed input inversion amplification circuit. One input terminal of the second operation amplifier is applied with the same input value as the fixed input value applied to the one input terminal of the first operation amplifier. Another input terminal of the second operation amplifier is applied with a variable input corresponding to an output of the first operation amplifier.

Methods and apparatus relating to a low ripple mechanism of mode change in switched capacitor voltage regulators are described. In an embodiment, a mode change of a Switching Capacitor Voltage Regulator (SCVR) is caused based at least in part on a comparison of an output voltage of the SCVR and a reference voltage. The output voltage is sensed based at least in part on a clock signal. Other embodiments are also disclosed and claimed.

Methods and apparatus relating to a low ripple mechanism of mode change in switched capacitor voltage regulators are described. In an embodiment, a mode change of a Switching Capacitor Voltage Regulator (SCVR) is caused based at least in part on a comparison of an output voltage of the SCVR and a reference voltage. The output voltage is sensed based at least in part on a clock signal. Other embodiments are also disclosed and claimed.

A charger circuit for providing a charging power to a battery includes a power delivery unit and a power conversion circuit. The power conversion circuit includes at least one conversion switch coupled to an inductor, a front stage switch conducting a DC power generated by the power delivery unit to generate a mid-stage power, and a direct charging switch. In a switching charging mode, the conversion switch converts the mid-stage power to the charging current onto a charging node. In a direct charging mode, the power delivery unit regulates the DC current, and the front stage switch and the direct charging switch conduct the DC current onto the charging node. The body diodes of the front stage switch and the direct charging switch are reversely coupled, and the body diodes of the front stage switch and the conversion switch are reversely coupled, for blocking the parasitic body current.

A charger circuit for providing a charging power to a battery includes a power delivery unit and a power conversion circuit. The power conversion circuit includes at least one conversion switch coupled to an inductor, a front stage switch conducting a DC power generated by the power delivery unit to generate a mid-stage power, and a direct charging switch. In a switching charging mode, the conversion switch converts the mid-stage power to the charging current onto a charging node. In a direct charging mode, the power delivery unit regulates the DC current, and the front stage switch and the direct charging switch conduct the DC current onto the charging node. The body diodes of the front stage switch and the direct charging switch are reversely coupled, and the body diodes of the front stage switch and the conversion switch are reversely coupled, for blocking the parasitic body current.

A control circuit of a switching power-supply device that converts a first DC voltage supplied from an input power source to a second DC voltage, includes: a first A/D converter that converts the second DC voltage into a first digital value, in response to a sampling clock depending on a first sampling clock and a second sampling clock; a control signal generation unit that generates a control signal for controlling on-and-off of the switching element based on of a difference between the first digital value and a target value; a regeneration completion sensing unit that senses completion of regeneration of the inductor and outputs a regeneration completion signal; and a sampling clock generation unit that: generates the first sampling clock, in response to the control signal to turn on the switching element, and generates the second sampling clock, in response to the regeneration completion signal.

A synchronous regulator controller, including a synchronous switch that is coupled between a first node and a second node. The controller also includes a first voltage divider that includes a first resistive device that is coupled between the first node and a third node, and a second resistive device that is coupled between the third node and a second node. The controller also includes a comparator having a first input that is coupled to the first node, and a second input that is coupled to a forth node. The controller also includes a current source that is arranged to provide a current to the fourth node. The controller also includes a third resistive device that is coupled between the third node and the fourth node.

A multiphase power converter and a corresponding method is presented. The multiphase power converter contains a first and a second constituent switched-mode power converter. The first constituent switched-mode power converter provides, both in a first mode of operation and in a second mode of operation, a first phase current to an output of the converter. The second constituent switched-mode power converter provides, in the second mode, a second phase current to the output of the converter. The converter switches, depending on an operation condition of the converter, between the first mode and the second mode. A first transconductance of the first constituent switched-mode power converter is adapted when switching between the first mode and the second mode. By adapting the first transconductance, unsteadiness of the output voltage of the converter occurring during the switching between both modes of operation is minimized.

A multiphase power converter and a corresponding method is presented. The multiphase power converter contains a first and a second constituent switched-mode power converter. The first constituent switched-mode power converter provides, both in a first mode of operation and in a second mode of operation, a first phase current to an output of the converter. The second constituent switched-mode power converter provides, in the second mode, a second phase current to the output of the converter. The converter switches, depending on an operation condition of the converter, between the first mode and the second mode. A first transconductance of the first constituent switched-mode power converter is adapted when switching between the first mode and the second mode. By adapting the first transconductance, unsteadiness of the output voltage of the converter occurring during the switching between both modes of operation is minimized.