Thanks to your support and Meir Mardechayev from Phoenix Technologies we decided to use ADP5052 at our design... few more question:
1. what is the deference between ADP5050&5052 beside the i2c interface and interrupt pin?
2. I'm plan to use ADP5052 without buck number 3. i thought about connecting EN3&Pin3 to GND and left all other related pin floated... is this configuration OK? what about not using power_good and connect is to GND?
3. UVLO precision enable - is it possible to use a single divider at EN1 and short EN2,EN4,EN5 to EN1? connecting UVLO directly to Vref will start the channels at vin=4.2?