Power-on control circuit and integrated circuit having multiple power domains

A power-on control circuit for an integrated circuit, the power-on control circuit comprising:

• a signal generator circuit, configured to generate a power-on control signal according to a tracking signal operative in a first power domain of the integrated circuit;
• and
• a voltage tracking circuit, powered by a first supply voltage operative in the first power domain and a second supply voltage operative in a second power domain of the integrated circuit, the second power domain being different from the first power domain, wherein the voltage tracking circuit comprises:
• an output terminal, coupled to the signal generator circuit;
• a supply terminal, coupled to the first supply voltage;
• and
• a reference terminal, coupled to a reference voltage;
• wherein voltage tracking circuit is configured to, when the first supply voltage is ready, selectively turn on a first circuit path between the supply terminal and the output terminal according to the power-on control signal, control a conduction status of a second circuit path between the output terminal and the reference terminal according to the second supply voltage, and generate the tracking signal at the output terminal.