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Powering of am335x with TPS650250

Vishnu Harihar1
Prodigy 245 points

Hi There,

In our design we are powering AM335X with TPS650250. The RTC section of processor is powered from VLDO1. It gives 1.8V when the board is powered but that LDO is not working with RTC backup battery. Both EN_LDO pin and VIN_LDO are connected to the back up battery and main power input through a diode mechanism. Why that LDO is not working with backup battery only? 

Due to this problem i'm not getting the RTC backup.

Any help will be appreciated.

Thanks

VH