A system may include a switch, a multiple stage voltage converter, and a regulation circuit. The switch may generate a pre-regulation signal based on an input signal. The multiple stage voltage converter may generate an output signal based on the input signal using a clock. The regulation circuit may generate a regulation signal based on the output signal and may generate a clock reference based on at least one of the pre-regulation signal and the regulation signal. The regulation circuit may generate the clock based on at least one of the pre-regulation signal, the regulation signal, and the clock reference and determine whether a voltage level of the regulation signal is within a range. If the voltage level of the regulation signal is within the range, the regulation circuit may generate a switch signal. The switch may adjust a voltage level of the pre-regulation signal based on the switch signal.

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 voltage regulator includes an operational amplifier that compares a feedback voltage that is proportional to an output voltage and a predetermined reference voltage that corresponds to a desired output voltage. The operational amplifier controls the conduction state of an output transistor according to the comparison. A detecting circuit monitors the operating state of the operational amplifier, and in the case that the operational amplifier is not operating, outputs a signal which causes the output transistor to be placed in a non-conductive state.

A voltage regulator includes an operational amplifier that compares a feedback voltage that is proportional to an output voltage and a predetermined reference voltage that corresponds to a desired output voltage. The operational amplifier controls the conduction state of an output transistor according to the comparison. A detecting circuit monitors the operating state of the operational amplifier, and in the case that the operational amplifier is not operating, outputs a signal which causes the output transistor to be placed in a non-conductive state.

A circuit structure for realizing circuit pin multiplexing, comprising an MCU module, a temperature sensing circuit and a functional module circuit. The output end of the temperature sensing circuit is connected with an enable signal interface of the MCU module, the output voltage of the temperature sensing circuit is always higher than the threshold voltage of the enable signal, and the MCU module is connected with the functional module circuit. The circuit structure of the present invention realizes the mutual influence of analog signal output and digital signal transmission by designing a temperature sensing output curve, and achieves multi-function multiplexing of a single pin, so that the output of the analog signal and the input of the digital signal can share the pins, it solves the problem of the limitation of the number of pins, and promotes the transmission of the signal and improves the cost performance of the circuit.

A circuit structure for realizing circuit pin multiplexing, comprising an MCU module, a temperature sensing circuit and a functional module circuit. The output end of the temperature sensing circuit is connected with an enable signal interface of the MCU module, the output voltage of the temperature sensing circuit is always higher than the threshold voltage of the enable signal, and the MCU module is connected with the functional module circuit. The circuit structure of the present invention realizes the mutual influence of analog signal output and digital signal transmission by designing a temperature sensing output curve, and achieves multi-function multiplexing of a single pin, so that the output of the analog signal and the input of the digital signal can share the pins, it solves the problem of the limitation of the number of pins, and promotes the transmission of the signal and improves the cost performance of the circuit.

A transistor semiconductor die includes a first current terminal, a second current terminal, and a control terminal. A semiconductor structure is between the first current terminal, the second current terminal, and the control terminal and configured such that a resistance between the first current terminal and the second current terminal is based on a control signal provided at the control terminal. Short circuit protection circuitry is coupled between the control terminal and the second current terminal. In a normal mode of operation, the short circuit protection circuitry is configured to provide a voltage drop that is greater than a voltage of the control signal. In a short circuit protection mode of operation, the short circuit protection circuitry is configured to provide a voltage drop that is less than a voltage of the control signal.

A transistor semiconductor die includes a first current terminal, a second current terminal, and a control terminal. A semiconductor structure is between the first current terminal, the second current terminal, and the control terminal and configured such that a resistance between the first current terminal and the second current terminal is based on a control signal provided at the control terminal. Short circuit protection circuitry is coupled between the control terminal and the second current terminal. In a normal mode of operation, the short circuit protection circuitry is configured to provide a voltage drop that is greater than a voltage of the control signal. In a short circuit protection mode of operation, the short circuit protection circuitry is configured to provide a voltage drop that is less than a voltage of the control signal.

An apparatus includes an amplifier, a pass transistor connected to a load and to an input of the amplifier, and a capacitor connected between the amplifier and the pass transistor.

An apparatus includes an amplifier, a pass transistor connected to a load and to an input of the amplifier, and a capacitor connected between the amplifier and the pass transistor.