The ADP1872 is synchronous buck controller. Theoretically, synchronous buck converters can be used as bidirectional converters. So keeping that in mind the ADP1872 should also be bidirectional (i.e it should be able to deliver current from and to both sides if required). Is it so ?
The ADP1872 is not a good choice for a bidirectional converter because it is a current mode part. It would be better to choose a voltage mode part like the ADP1828 or ADP1829. We have in fact used these parts for high current DDR termination applications.