Techniques and apparatus for current-based transitioning between a buck converter mode and a charge pump mode in an adaptive combination power supply circuit. One example power supply circuit generally includes a switching regulator and control logic coupled to the switching regulator. The control logic is generally configured to compare an indication of a current associated with the switching regulator to a threshold and to control a transition of the switching regulator between a buck converter mode and a charge pump mode based on the comparison.

Disclosed embodiments may include a power converter having a first and a second terminal, a charge pump power conversion circuit, and a protection circuit. The first terminal may be to receive an input voltage. The second terminal may be to output an output voltage. The charge pump power conversion circuit may be electrically coupled between the first terminal and the second terminal, and to convert the input voltage to the output voltage. The protection circuit may be electrically coupled to the charge pump power conversion circuit. The protection circuit may include a first switching device to, in response to a control signal, block a power flow from the first terminal to the second terminal, and from the second terminal to the first terminal.

A power delivery system may include a first voltage regulator configured to output an upper intermediate voltage about an expected discharge voltage plateau of a battery for use by the power delivery system, a switched capacitive charge pump configured to down convert the upper intermediate voltage of the first voltage regulator to a lower intermediate voltage, and a second voltage regulator configured to use the lower intermediate voltage to provide power to a load.

Analog circuit made with digital parts can be made at deep sub-micron feature size. The use of capacitor ladders, configured to be switched from series to parallel to series electronically, permit precision outputs to be achieved without precision parts. This invention is operable in two phases, “Sample” and “Calculate (or Reference)” During the sample phase, input voltage is stored as charge, and in the calculate phase, the charges are re-arranged to perform the desired mathematical operation; while the output is expressed with a mechanism that supplies the calculated voltage at necessary current without consuming charge.

Various implementations described herein are directed to an integrated circuit. The integrated circuit may include a first voltage source providing a first voltage having a first polarity. The integrated circuit may include a second voltage source providing a second voltage having a second polarity that is opposite the first polarity. The integrated circuit may include a first circuit portion configured to receive the first and second voltages and provide one or more feedback voltages. The integrated circuit may include a second circuit portion configured to receive the first and second voltages along with the one or more feedback voltages and provide an output voltage that is proportional to the first voltage based on a rational conversion ratio that is derived by selection of at least one of the first and second voltages and the one or more feedback voltages.

A regulator system includes a multi-bit detector system and a multi-cell charge/discharge circuit. The multi-bit detector system includes a plurality of detectors. Each of the plurality of detectors has a predetermined threshold voltage. The multi-cell charge/discharge circuit includes a plurality of charge pumps. Each of the charge pumps is configured to generate a predetermined charge. Each of the charge pumps is associated with a predetermined threshold voltage of the detector circuit.

Switched capacitor circuit architectures that may enable high efficiency step-up or step-down dc-dc conversion from a primary, fixed supply input voltage using a four-switch switched capacitor topology and a separate auxiliary supply input voltage. The auxiliary supply input voltage can be optimized within the system or chosen from among other readily available supplies in the system to achieve the highest efficiency conversion ratio, without modifying the switch and flying capacitor arrangement. The auxiliary supply input voltage may be applied to other fixed conversion ratio converters to achieve higher efficiency conversion.

A main circuit power supply device includes: a plurality of voltage-division power storage elements connected in series; voltage adjustment circuits for adjusting each of voltages of the plurality of voltage-division power storage elements through mutual transfer of power between the plurality of voltage-division power storage elements; and at least one DC/DC converter which is connected to at least one of the voltage-division power storage elements and supplies a control power source to a main circuit control circuitry to control a main circuit.

A bipolar output charge pump circuit having a network of switching paths for selectively connecting an input node and a reference node for connection to an input voltage, a first pair of output nodes and a second pair of output nodes, and two pairs of flying capacitor nodes, and a controller for controlling the switching of the network of switching paths. The controller is operable to control the network of switching paths when in use with two flying capacitors connected to the two pairs of flying capacitor nodes, to provide a first bipolar output voltage at the first pair of output nodes and a second bipolar output voltage at the second pair of bipolar output nodes.

An integrated driver applied to a voltage converter having a switched capacitor conversion circuit, the integrated driver including: a first die having a first-type power transistor; a second die including at least one second-type power transistor, where a withstand voltage of the first-type power transistor is higher than a withstand voltage of the second-type power transistor; and where the first die and the second die are coupled in series between a high potential terminal and a low potential terminal of the voltage converter, such that the first-type power transistor receives a high voltage signal.