If my application uses the RTC functionality and requires the RTC-only mode, the internal LDO is required to enable proper wakeup signalling from the RTC domain. My understanding is that AM3352 will consume more power in this mode comparing to (1) RTC functionality and no RTC-only mode and (2) No RTC functionality and no RTC-only mode.
Does anyone know how much power it will consume from VDDS_RTC (which is powered by an external 1.8V LDO) while in the RTC-only mode?