Voltage attack detection circuit and chip

A chip, comprising:

• a power management unit;
• and
• a voltage attack detection circuit, comprising;
• at least one voltage regulation circuit, wherein the at least one voltage regulation circuit is connected to an external supply respectively, the at least one voltage regulation circuit is configured to convert the external supply to at least one internal supply, and the at least one internal supply is configured to output at least one first voltage respectively;
• and
• at least one voltage sensor, wherein the at least one voltage sensor is connected to the at least one internal supply respectively, to receive the at least one first voltage respectively, each voltage sensor of the at least one voltage sensor is configured to output a first signal based on a received reference voltage and a received first voltage of the at least one first voltage, and the first signal is configured to indicate whether the received first voltage is within a preset voltage range;
• wherein the power management unit is connected to the voltage attack detection circuit, and the voltage attack detection circuit is configured to detect whether a supply voltage of the power management unit is under voltage attack.