BAT-RTC: current consumption too high


#1

Hi.
We are using SL6087 modem in our design. In work state modem takes about 250uA to supply RTC; in power off like specified in Table 44 of Technical Specification - from 3.0 to 3.6uA. Is it normal situation or we have some kind of flaw in our design? What is recommended design limiting current usage of RTC during work state?

I would appreciate any help.

Regards, Marcin Smoczyński.

(edited)


#2

Hi,

I guess as mentioned in the PTS ,this pin is used as back-up power supply for the internal RTC. so
when VBATT is available the back-up battery would be charged that is why you see the 250uA current
in power on state.