A timer circuit including a ramp voltage generator configured to generate a ramp voltage, a comparator coupled on its input side to the ramp voltage generator to receive the ramp voltage and configured to compare the ramp voltage with a switching threshold, and a voltage pulse generating circuit configured to generate a reset signal as a response to a received output signal of the comparator, wherein the reset signal has a shorter time duration than an intrinsic reset time duration of the comparator.

A voltage adjustment apparatus, a chip, a power source, and an electronic device. The apparatus comprises: a voltage input module, used for receiving an input voltage; a current determining module, electrically connected to the voltage input module and used for determining an adjustment current on the basis of the input voltage and a load current; a control module, electrically connected to the current determining module and used for outputting a control signal on the basis of the adjustment current; and a voltage output module, electrically connected to the voltage input module, the current determining module, and the control module, and being used for outputting a target voltage on the basis of the control signal and the input voltage.

A power management system includes a direct current-direct current DC-DC conversion circuit, a first control circuit, a charging circuit, an input port, and an output port. The input port is configured to receive an input voltage. The output port is configured to supply an output voltage to a load. The DC-DC conversion circuit is configured to charge the output port from the input port, to adjust the output voltage. The first control circuit is configured to: obtain a second feedback voltage of the output voltage from the output port, generate a first control signal based on the second feedback voltage and a second reference signal, and supply the first control signal to the charging circuit. The charging circuit charges the output port from the input port based on the first control signal, to supplementally adjust the output voltage.

An apparatus includes a controller. The controller controls a main power supply to produce an output signal to power multiple dynamic loads such as disposed in series or other suitable configuration. The controller detects a transient power consumption condition associated with a first dynamic load of the multiple dynamic loads. The controller then adjusts control of the main power supply and generation of the output signal based on the detected transient power consumption condition.

An apparatus includes a controller. The controller monitors a magnitude of first current supplied by an output voltage of a first power converter to power a dynamic load. The controller controls a second power converter to supply second current through the dynamic load based on the monitored magnitude of first current.

A voltage regulator for providing power to a system includes feedforward circuitry receiving a signal from the system indicating the current needed by the system, and the feedforward circuitry causes the voltage regulator to change the voltage regulator output current in response to the signal from the system.

A feedback circuit of a voltage regulator with adaptive voltage positioning (AVP) includes a first sensing circuit, a second sensing circuit, a third sensing circuit, and a processing circuit. The first sensing circuit generates a first feedback signal that provides information of an inductor current of the voltage regulator. The second sensing circuit generates a second feedback signal that provides information of an output voltage of the voltage regulator. The third sensing circuit generates a third feedback signal that provides information of a capacitor current of an output capacitor of the voltage regulator. The processing circuit generates a control voltage signal according to the first feedback signal, the second feedback signal, and the third feedback signal, and outputs the control voltage signal to a controller circuit of the voltage regulator for regulating the output voltage of the voltage regulator.

A converter system (100) includes a switch (102) adapted to be coupled to a switching terminal (104). The switch (102) is configured to generate a switching signal having first and second states at the switching terminal (104). Ripple generating circuitry (122) is adapted to be coupled to the switching terminal (104) and is configured to: generate a filtered signal based on the switching signal; and keep the filtered signal within a particular range. Loop control circuitry (116) is coupled to the ripple generating circuitry (122) and is configured to control the switch (102) based on the filtered signal.

A fast-switching power management circuit operable to prolong battery life is provided. The power management circuit includes a voltage circuit that can generate an output voltage for amplifying an analog signal in a number of time intervals and a pair of hybrid circuits each causing the output voltage to change in any of the time intervals. A control circuit is configured to activate any one of the hybrid circuits during a preceding one of the time intervals to cause the output voltage to change in an immediately succeeding one of the time intervals. By starting the output voltage change earlier in the preceding time interval, it is possible to complete the output voltage change within a switching window in the succeeding time interval while concurrently reducing rush current associated with the output voltage change, thus helping to prolong battery life in a device employing the power management circuit.

One example includes a differential amplifier, a voltage weighting element, coupled to a voltage source which provides an input voltage, to provide a reference voltage with a constant power limit when the input voltage varies, an error amplifier configured to receive and compare the reference voltage provided from the voltage weighting element and a feedback sensed voltage provided from the differential amplifier to identify whether the sensed voltage exceeds the reference voltage, and a pulse width modulation (PWM) controller, coupled to a power transformer and the error amplifier, that reduces a transformer input current provided to the power transformer based on the comparison of the reference voltage from the voltage weighting element and the feedback sensed voltage from the differential amplifier.