US Patent 11188110 Multi-voltage chip

The disclosure provides a multi-voltage chip, including a regulator circuit, a high-voltage domain controller, a low-voltage domain controller, and a digital logic circuit. The regulator circuit receives and responds to a feedback signal, a regulating start signal, and a reference voltage to convert a system high voltage into a regulated voltage. The high-voltage domain controller receives a power signal and the system high voltage to provide the reference voltage and the regulating start signal. The low-voltage domain controller is coupled to the high-voltage domain controller and receives the regulated voltage to provide a system start signal in response to the regulating start signal. The digital logic circuit is coupled to the regulator circuit to receive the regulated voltage and provide the feedback signal, and is coupled to the low-voltage domain controller to operate in response to the system start signal.