Semiconductor device

摘要

A semiconductor device includes a first semiconductor chip which includes a first power supply terminal and into which a circuit block which is operated by a power supply voltage supplied to the first power supply terminal is integrated, a power circuit that includes switching transistors and supplies the power supply voltage to the first power supply terminal, and a DCDC control unit that is formed on the first semiconductor chip and generates a control signal for controlling the turning on and off of the switching transistors in response to an information signal from the circuit block and a voltage information signal corresponding to an output voltage from the power circuit.

主权项

1. A semiconductor device comprising:
a first semiconductor chip which includes a first power supply terminal and into which a circuit block operated by a power supply voltage supplied to the first power supply terminal is integrated; a power circuit that includes a first switching transistor and supplies the power supply voltage to the first power supply terminal; and a control circuit that is formed on the first semiconductor chip and generates a control signal for controlling the turning on and off of the first switching transistor in response to an information signal from the circuit block and a voltage information signal corresponding to the power supply voltage, wherein the control circuit includes: a voltage error signal generation circuit that compares the power supply voltage with a predetermined reference voltage and generates a first control signal on the basis of the comparison result; a frequency error signal generation circuit that compares the operating frequency and phase of the circuit block with the frequency and phase of the power circuit and generates a second control signal on the basis of the comparison result; and a circuit that generates a signal for controlling the ratio of the turning on and off of the first switching transistor of the power circuit in response to the first control signal and the second control signal.