A low-dropout regulator includes a comparator for comparing a feedback voltage with a reference voltage to output a comparison signal, which corresponds to a comparison result, to a control node; an internal voltage generator coupled to the control node, and for generating the feedback voltage and an internal voltage based on the comparison signal; and a controller coupled to the control node, and for monitoring the internal voltage based on the comparison signal, and controlling a voltage level of the comparison signal according to a monitoring result.

A low dropout regulator includes a first stage that generate a first output voltage and a second stage that generates a second output voltage different from the first output voltage. The first stage and the second stage are coupled in parallel to a node, the stages are selectively controlled respective first and second output signals based on different conditions. One condition may be operation of a load in one or more predetermined modes. Another condition may be transition between modes. Selective control of the first stage during a mode transition may reduce voltage undershoot or voltage overshoot in the load.

A low dropout regulator includes a first stage that generate a first output voltage and a second stage that generates a second output voltage different from the first output voltage. The first stage and the second stage are coupled in parallel to a node, the stages are selectively controlled respective first and second output signals based on different conditions. One condition may be operation of a load in one or more predetermined modes. Another condition may be transition between modes. Selective control of the first stage during a mode transition may reduce voltage undershoot or voltage overshoot in the load.

An amplifier circuit includes an amplifier and an output transistor. The amplifier is coupled to an output node of the output transistor for providing an output voltage to a load device. The amplifier circuit also includes a slew-rate control circuit coupled to a gate node of the output transistor and configured to control voltage rise of the gate node of the output transistor during power-up to reduce output voltage overshoot.

An amplifier circuit includes an amplifier and an output transistor. The amplifier is coupled to an output node of the output transistor for providing an output voltage to a load device. The amplifier circuit also includes a slew-rate control circuit coupled to a gate node of the output transistor and configured to control voltage rise of the gate node of the output transistor during power-up to reduce output voltage overshoot.

A power control device includes: an output voltage controller configured to control an output voltage based on a feedback voltage corresponding to the output voltage; and an overvoltage protector configured to continue or stop the operation of the output voltage controller based on a first detection result of whether the output voltage has exceeded an output voltage threshold value and a second detection result of whether the feedback voltage has fallen to or below a feedback voltage threshold value.

A power control device includes: an output voltage controller configured to control an output voltage based on a feedback voltage corresponding to the output voltage; and an overvoltage protector configured to continue or stop the operation of the output voltage controller based on a first detection result of whether the output voltage has exceeded an output voltage threshold value and a second detection result of whether the feedback voltage has fallen to or below a feedback voltage threshold value.

An electrical circuit for detecting circuit defects and/or for preventing overvoltages in controllers. The electrical circuit including a power controller circuit, encompassing a first transistor, a control loop including an operation amplifier and a first reference voltage source, and feedback resistors, and an overvoltage suppression circuit, encompassing a second transistor, a control loop including an operation amplifier and a reference voltage source, and feedback resistors, the power controller circuit being provided to make a voltage available for the overvoltage suppression circuit and the overvoltage suppression circuit being provided to make a protected voltage available.

An electrical circuit for detecting circuit defects and/or for preventing overvoltages in controllers. The electrical circuit including a power controller circuit, encompassing a first transistor, a control loop including an operation amplifier and a first reference voltage source, and feedback resistors, and an overvoltage suppression circuit, encompassing a second transistor, a control loop including an operation amplifier and a reference voltage source, and feedback resistors, the power controller circuit being provided to make a voltage available for the overvoltage suppression circuit and the overvoltage suppression circuit being provided to make a protected voltage available.

A method and apparatus for operating a power distribution system, includes providing a solid state switch downstream of a power source and upstream of an electrical load, the solid state switch operable in a conducting mode that enabling conduction from upstream to the output and a non-conducting mode that disables conduction from the input to the output, and providing a transient voltage suppressor defining a breakdown voltage upstream of the solid state switch.