Custom carrier board for Cube - Hardware related queries

Hello,

I am starting a custom hardware design for a Orange Cube Carrier board. I am following the schematic available at The-Cube/CB_REV_C_Altium at master · proficnc/The-Cube · GitHub by @proficnc

  1. PSM section:
    a. Why is MIC5332 selected as the LDO? It is dual output device and here in the design only one output is used for VDD_3V3_SPEKTRUM . Is it for the form factor?
    b. I understand BQ24313 and /5 are used as overvoltage/overcurrent protection. But the BQ family is more specifically meant for battery related applications. There maybe cheaper ICs that can do the overvoltage and overcurrent protection. Any specific reason for selecting BQ24313?

This is my first hardware design in the drone space and my apologies if I missed something obvious. Awesome to see such good designs made opensource!

Thanks and cheers,
Abhijith