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Fixed regulator on VBACKUP?

I am using the TPS65910A31A1RSLT PMU.

In our application, we would like to put a fixed regulator on the VABCKUP pin. It will always have power.

There is a lot of information regarding batteries and caps, (see post by on Oct 19 2012 08:33 AMbut I can't find any discussion regarding using a fixed regulator.

QUESTION:

(1) Can I use a fixed regulator to power the VBACKUP pin?

(2) Will this affect the TPS65910A31A1RSLT since it will try to to charge what's connected at the VBACKUP pin when at full power?