Due to availability, I would like to use TPS259535 instead of TPS259531 on an already designed CCA. In the current design using TPS259531, pin 6 is left floating. However, for the TPS259535, pin 6 has a different function which is Quick Output Discharge. Can the QOD pin be left floating or does it need to be tied to VOUT? Datasheet only mentions that it "can" be tied to the output, but doesn't mention if it can remain floating.