Embedded computer using Allwinner H3 - Power management

[dingari]

Hi, my team is staring work on an embedded computer using the Allwinner H3 SOC and we have a few questions to get out of the way regarding the power management.

I've looked at the FriendlyArm NanoPi (both NEO and M1) and OrangePi Plus schematics (all using Allwinner H3), and they seem to be using seperate regulator ICs for the different voltage rails. While the CHIP computer (Allwinner R8) is using a single AXP209 PMU IC (including a battery charger).

My product will run from a battery, so I'm leaning more toward the single PMU IC route. I've found AXP209, AXP221, AXP223 and AXP809, which all seem to be fitting. I've not looked too much into the differences, but the AXP221 or 223 seem appropriate at first glance. The AXP809 is also much more expensive than the others.

Is this a cost / size / availability tradeoff? Or is there another reason the H3 boards all utilize seperate ICs?

Also, what WiFi + Bluetooth chip would you recommend?

NanoPi M1 schematic: http://wiki.friendlyarm.com/wiki/images/d/d8/NanoPi-M1-1603-Schematic.pdf
NanoPi NEO schematic: http://wiki.friendlyarm.com/wiki/images/a/aa/NanoPi-NEO-1606-Schematic.pdf
OrangePi Plus schematic: http://pan.baidu.com/s/1bnppzv5
CHIP schematic: https://github.com/NextThingCo/CHIP-Hardware/blob/master/CHIP%5Bv1_0%5D/CHIP_v1_0_SCHEMATIC_20151203.pdf