An apparatus includes a controller a current mode controller that produces an output voltage by supplying output current from at least one power supply phase of a power supply to power a load. The controller produces an error current signal based on a difference between a magnitude of the output current supplied from the power supply to a load and a phase current setpoint. Based on a magnitude of the error current signal, control a pulse width setting of a pulse width modulation signal controlling the at least one power supply phase. The controller varies a leading edge and a falling edge of a pulse width ON-time of the pulse width modulation signal over each of multiple control cycles depending on variations in the magnitude of the pulse width setting.

An apparatus includes a controller that monitors an error voltage indicating a difference between an output voltage and a setpoint voltage. Based on the monitored error voltage, the controller generates modulation adjustment signals including a frequency adjustment signal and an ON-time adjustment signal. The controller generates a pulse width modulation signal of a first power supply phase in accordance with both the frequency modulation adjustment signal and the ON-time adjustment signal.

A main circuit includes a switching element, and converts electric power input to the main circuit and supplies a result of the conversion to a load. The controller switches a control scheme of the main circuit from a first control scheme to a second control scheme at a first time point when the output value starts to vary and switches the control scheme of the main circuit from the second control scheme to the first control scheme at a second time point when a determination is made that switching of a variation direction of the output value will occur on the basis of a detection value of the detector.

A capacitor is discharged to a point where ring back in an output voltage across the capacitor is eliminated in response a transient event to high side and low side switching devices conductively coupled to an inductor and the capacitor before turning on the high side switch and varying an output voltage with a change in a load current.

A method for controlling a battery-powered power supply. The method includes generating a first output from a first power supply within the battery-powered power supply. The first output is coupled to an output bus. The method further includes monitoring a voltage of the output bus, and determining, using a controller of the battery-powered power supply, whether the voltage of the output bus is less than a first predetermined level. The method further includes deactivating the first power supply in response to determining that the voltage of the output bus is below the first predetermined level, and generating a second output from a second power supply within the battery-powered power supply. The second output is configured to be coupled to the output bus. The second power supply has a higher output rating than the first power supply.

A power supply is configured to perform an at least partial compensation of a voltage variation caused by a load change using a voltage variation compensation mechanism which is triggered in response to an expected load change. An Automated test equipment for testing a device under test comprises a power supply, which is configured to supply the device under test. The automated test equipment comprises a pattern generator configured to provide one or more stimulus signals for the device under test. The power supply is configured to perform an at least partial compensation of a voltage variation caused by a load change using a voltage variation compensation mechanism which is activated in synchronism with one or more of the stimulus signals and/or in response to one or more response data signals from the device under test. Corresponding methods and a computer program are also described.

A control circuit for controlling switching operation of a switching stage of a converter includes a phase detector circuit that generates a pulse-width modulated (PWM) signal in response to a phase comparison of two clock signals. A first clock signal has a frequency determined as a function of a first feedback signal proportional to converter output voltage. A first transconductance amplifier generates a first current indicative of a difference between a reference voltage and the first feedback signal, and a second transconductance amplifier generates a second current indicative of a difference between the reference voltage and a second feedback signal proportional to a derivative of the converter output voltage. A delay line introduces a delay in the first clock signal that is dependent on the first and second currents as well as a compensation current dependent on a selected operational mode of the converter.

A sub-circuit of a voltage regulator includes a load condition detection circuit and a controllable circuit. The load condition detection circuit is arranged to detect a load transient frequency of a load powered by the voltage regulator, and generate a control signal according to a detection result of the load transient frequency. The controllable circuit is arranged to receive the control signal, wherein an operational behavior of the controllable circuit dynamically changes in response to the control signal.

A feedback loop circuit of a voltage regulator includes a loadline and a compensation circuit. The loadline generates a feedback signal according to a sensed current signal that provides information of an inductor current of the voltage regulator, and outputs the feedback signal to a controller circuit of the voltage regulator for regulating an output voltage of the voltage regulator. The compensation circuit generates a compensation signal to compensate for a deviation of the output voltage, wherein the feedback signal generated from the loadline is affected by the compensation signal.

In an example, a method includes storing a pending PWM pulse for a switching voltage regulator. The method also includes determining a switching voltage regulator is operating in a current limit mode, where an inductor current is above a current limit threshold. The method includes providing a predetermined number of PWM pulses in the current limit mode. The method also includes, responsive to providing the predetermined number of PWM pulses, ceasing storage of pending PWM pulses for the switching voltage regulator.