SLVSB64I November 2011 – March 2018 TPS65217
The PWR_EN pin is used to keep the device in the ACTIVE mode after it detects a wakeup event as described in the Device Functional Modes section. If the PWR_EN pin is not asserted within 5 s of the nWAKEUP pin being pulled low, the device shuts down the power and goes to either the OFF or SLEEP state, depending on the OFF bit in the STATUS register. The PWR_EN pin is level-sensitive, meaning that PWR_EN may be pulled high before the wake-up event.
The PWR_EN pin can also be used to toggle between the ACTIVE and SLEEP states. For more information, see SLEEP in the PMIC States section.