Here is a schematic, that i designed.
I turned on this schematic variant and it works without current flowing from VOUT to VIN and it works well. After that I wanted to turn off "Power save mode" by setting PS/SYNC to VBAT. I changed Lion battery to adjustable power supply, turned on, set EN to High and then voltage on VBAT increased up to 6.8V and i don`t understand why.
So, the questions are:
1) can i connect and use schematic as i mentioned above or this connection has unexpected reactions?
2) what is the reason of voltage increasing in VBAT by setting PS/SYNC pin to HIGH?
P.S. output current is 2.2A in peak