7.4.1.2 ACTIVE State

This state is the typical mode of operation when the system is up and running. All DC/DC converters, LDO regulators, load switches, the WLED driver, and the battery charger are operational and can be controlled through the I²C interface.

After a wake-up event, the PMIC enables all rails not controlled by the sequencer and pulls the nWAKEUP pin low to signal the event to the host processor. The device goes to the ACTIVE state only if the host asserts the PWR_EN pin within 5 s after the wake-up event. Otherwise, the device goes to the OFF state. In the ACTIVE state, the sequencer is triggered to automatically enable the remaining power rails. The nWAKEUP pin returns to the Hi-Z state after the PWR_EN pin has been asserted. Figure 3 shows a timing diagram. The device can also go directly to the ACTIVE state from the SLEEP state by pulling the PWR_EN pin high. For more information, see the description of the SLEEP State.

The PWR_EN pin must be pulled low for the device to go from ACTIVE state.