Power Supply System

A method comprising:

• executing a first operating mode of a power supply system comprising:
• a first node configured to be powered either directly by a voltage application source or through a switched-mode power supply coupled to the voltage application source;
• digital circuits and analog circuits, wherein the first node is configured to supply power to the digital circuits and the analog circuits, and wherein the digital circuits comprise a memory and at least one of a logic circuit or a processing unit;
• and
• a first linear regulator coupled between the digital circuits and the first node, wherein, during the first operating mode, the first node is powered by the switched-mode power supply, the first linear regulator is operational, and the memory and the logic circuit are powered.

A power supply system comprising:

• a voltage application source;
• a switched mode power supply having an output coupled to the voltage application source through a first path and through a second path different from the first path;
• a first node coupled to the output of the switched mode power supply, the switched mode power supply configured to couple the first node to the voltage application source through the first path in a first operating mode and through the second path in a different second operating mode;
• a digital regulator coupled to the first node;
• a digital circuit coupled to an output of the digital regulator;
• an analog regulator coupled to the first node;
• and
• an analog circuit coupled to an output of the analog regulator.