Hello specialist,Please let me know about PMIC.
Q1:If I connect a supercapacitor to VBAT and want to maintain the RTC clock (keep the time moving) even during a power outage, would it be enough to set register 0x08 [4] RTC INT to 0: Disable the FOUT/IRQ function in battery backup mode in order to achieve the current consumption value of "Max 950nA" listed in the datasheet?Please let me know if any other setting changes are necessary.
Q2:Am I correct in understanding that the only difference with using register 0x08 [4] RTC INT with the default setting of 1 is whether or not the frequency clock is output from the INT# terminal?*(Am I correct in understanding that if FOUT is not used externally, the backup time can be extended by setting register 0x08 [4] to 0?)
Best regards,ACGUY
Q1.Yes, set register 0x08 [4] RTC INT to 0. Current into the VBAT pin is IBAT, which is 950nA maximum.If FOUT is enabled, then current into VBAT pin is IOP_RTC, which is maximum 5uA.
Q2.Yes, but I’m sure you also know that if FOUT is enabled, then INT# is disabled.Yes, if FOUT is disabled, then backup time will be greater than when FOUT is enabled.