Some questions about the LP5907 3.3V Regulator on the Cyton

I'm trying to build a Cyton board with some modifications, namely one without an RFduino module. But it looks like the RFduino is used as a 3V enable for the LP5907. If I'm not using the RFduino, how would I set up the enable pin for the regulator?

Also, the LP5907 datasheet tells me that the recommended operating input voltage range is between 2.2V and 5.5V. The absolute maximum voltage is 6V. If I'm using a 6V battery(like the one that comes with the Cyton in the shop), wouldn't this cause problems with the LP5907?

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