Load dependent method to reduce quiescent current during multi-cell to single-cell battery regulation

A method for reducing quiescent power consumption in a battery-operated system, the method comprising:

• detecting, by a control logic circuit, a power state of the system;
• outputting, by the control logic circuit, one or more control signals to control one or more power circuits;
• in a first operating mode, selectively coupling a first regulated power signal from a first power circuit to a system load through an ideal diode circuit;
• in a second operating mode, selectively coupling a second regulated power signal from a second power circuit to the system load through the ideal diode circuit, wherein a quiescent current associated with the second power circuit is greater than a quiescent current associated with the first power circuit;
• and
• transitioning between the first operating mode and the second operating mode responsive to the detected power state of the system.

A method for controlling power delivery in a battery-operated system, the method comprising:

• operating a control logic circuit in a first operating mode in which a first power circuit is enabled to provide a regulated power signal to a system load and a second power circuit is disabled;
• detecting, by the control logic circuit, that system power is ON and responsively transitioning from the first operating mode to a second operating mode in which the second power circuit is enabled;
• detecting, by the control logic circuit, that system power is OFF during the second operating mode and responsively transitioning to a third operating mode in which a countdown timer is initiated;
• monitoring the countdown timer and system power during the third operating mode;
• when the system power is detected ON before expiration of the countdown timer, transitioning from the third operating mode to the second operating mode;
• and
• when the countdown timer expires without detecting system power ON, transitioning from the third operating mode to the first operating mode.