A low-dropout regulator (LDO) capable of providing high power-supply rejection ratio (PSRR) and good reverse isolation. The LDO may include a core circuitry and a reverse isolation circuitry. The core circuitry may include a PSRR circuitry coupled to an output node and configured to provide high PSRR at the output node. The reverse isolation circuitry may be configured to provide good reverse isolation at the output node by, for example, providing current in response to ripples at the output node. The reverse isolation circuitry may be configured with bandwidth higher than that of the core circuitry such that it can provide fast transient response. The reverse isolation circuitry may be configurable and/or reconfigurable for a desirable reverse isolation performance. The reverse isolation circuitry may be configurable and/or reconfigurable to trade off between power consumed by the reverse isolation circuitry and a leakage current flowing through the core circuitry.

A DLDO has a configuration that mitigates performance degradation associated with limit cycle oscillation (LCO). The DLDO comprises a clocked comparator, an array of power transistors, a digital controller and a clock pulsewidth reduction circuit. The digital controller comprises control logic configured to generate control signals that cause the power transistors to be turned ON or OFF in accordance with a preselected activation/deactivation control scheme. The clock pulsewidth reduction circuit receives an input clock signal having a first pulsewidth and generates the DLDO clock signal having the preselected pulsewidth that is narrower that the first pulsewidth, which is then delivered to the clock terminals of the clocked comparator and the digital controller. The narrower pulsewidth of the DLDO clock reduces the LCO mode to mitigate performance degradation caused by LCO.

A circuit for stealing power from an external system without interfering with a communication protocol may include wiring connectors configured to receive wires from the external system; a first voltage regulator to regulate a voltage on the plurality of wiring connectors at a plurality of voltage levels to encode a first multi-bit binary message according to the communication protocol to be sent to the external system; a current monitor to measure a plurality of current levels received through the plurality of wiring connectors and decode the plurality of current levels to determine a second multi-bit binary message sent from the external system according to the communication protocol; and a power converter that adjusts an amount of power stolen from the plurality of wiring connectors based at least in part on the voltage on the plurality of wiring connectors.

A circuit for stealing power from an external system without interfering with a communication protocol may include wiring connectors configured to receive wires from the external system; a first voltage regulator to regulate a voltage on the plurality of wiring connectors at a plurality of voltage levels to encode a first multi-bit binary message according to the communication protocol to be sent to the external system; a current monitor to measure a plurality of current levels received through the plurality of wiring connectors and decode the plurality of current levels to determine a second multi-bit binary message sent from the external system according to the communication protocol; and a power converter that adjusts an amount of power stolen from the plurality of wiring connectors based at least in part on the voltage on the plurality of wiring connectors.

A power supply comprises an output stage configured to provide a supply current, in order to obtain a supply voltage. The power supply also comprises a digital regulator configured to receive a reference voltage information and a measured voltage information and to provide a control signal. The power supply further comprises an inner analog control loop, wherein the inner analog control loop is configured to provide an analog feedback signal, which is based on the supply voltage, to the output stage, to make an analog regulation contribution to a regulation of the supply voltage. A method for supplying power to a load is also disclosed.

Embodiments of this invention provide a voltage output test circuit, a voltage divider output circuit, and a memory. The voltage output test circuit includes: a first voltage divider unit, including a first terminal and a second terminal, where the first terminal of the first voltage divider unit is connected to a test power supply, and the second terminal of the first voltage divider unit is connected to an output terminal; a second voltage divider unit, including a first terminal and a second terminal, where the first terminal of the second voltage divider unit is connected to a ground, and the second terminal of the second voltage divider unit is electrically connected to the output terminal; and a third voltage divider unit, configured to adjust a resistance between the output terminal and the ground.

Embodiments of this invention provide a voltage output test circuit, a voltage divider output circuit, and a memory. The voltage output test circuit includes: a first voltage divider unit, including a first terminal and a second terminal, where the first terminal of the first voltage divider unit is connected to a test power supply, and the second terminal of the first voltage divider unit is connected to an output terminal; a second voltage divider unit, including a first terminal and a second terminal, where the first terminal of the second voltage divider unit is connected to a ground, and the second terminal of the second voltage divider unit is electrically connected to the output terminal; and a third voltage divider unit, configured to adjust a resistance between the output terminal and the ground.

The present disclosure describes a device for determining information regarding a connection of a circuit component that is connected to an output of a regulator in order to reduce fluctuations of an output signal at the output of the regulator. The device includes a processing unit that is configured to generate a statistical value that is a measure of fluctuations of the measurement signals, and thus of the output signal at the output of the regulator, based on a plurality of measurement signals, each of which has information regarding the output signal of the regulator and is recorded while a load component generates an electrical load at the output of the regulator. The processing unit is configured to compare the statistical value with a limit value and to determine the information regarding the connection of the circuit component based on the result of the comparison.

The present disclosure describes a device for determining information regarding a connection of a circuit component that is connected to an output of a regulator in order to reduce fluctuations of an output signal at the output of the regulator. The device includes a processing unit that is configured to generate a statistical value that is a measure of fluctuations of the measurement signals, and thus of the output signal at the output of the regulator, based on a plurality of measurement signals, each of which has information regarding the output signal of the regulator and is recorded while a load component generates an electrical load at the output of the regulator. The processing unit is configured to compare the statistical value with a limit value and to determine the information regarding the connection of the circuit component based on the result of the comparison.

In a power supply device, a voltage controller includes: a reference voltage circuit that generates a reference voltage based on an input voltage; a voltage control circuit that generates ate output voltage of the voltage controller based on the input voltage by controlling an output current of the voltage controller so that the output voltage of the voltage controller corresponds to the reference voltage; and a first current detector circuit that detects the output current of the voltage controller, and generates a first current detection signal corresponding to the output current thereof. A current controller includes: a second current detector circuit that detects an output current of the current controller, and generates a second current detection signal corresponding to the output current thereof; and a current control circuit controls the output current of the current controller so that the second current detection signal corresponds to the first current detection signal.