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TPS3619-33-EP: Query on the datasheet

Nithin Kekuda
Prodigy 10 points
Part Number: TPS3619-33-EP
Other Parts Discussed in Thread: TPS3808, TPS3619

Tool/software:

As per the data given in the datasheet, please clarify on the current consumption from the supply when Vdd= Vbat.

  • 0
    TI__Expert 4860 points

    Hi Nithin, 

    Thank you for your question.

    VBAT only connects to VOUT  when VDD falls below the VIT and VBAT is greater than VDD. So VBAT is the backup to VDD when VDD voltage voltage is low. You can expect  the current consumption will be 40 uA since VBAT won't be able to switch over.

    Are you planning to connect Vbat and VDD pins? I don't think that is the intended use case for TPS3619.  I think TPS3808 can be a better option for you if you don't need VBAT Backup switchover. 

    I hope this helps! 

    Best Regards,

    Sila 

  • 0 in reply to Sila Atalar
    Prodigy 10 points

    I want to use both battery and main supply. But current consumption from battery by the IC is the concern. So when Vout is Vbat what is the supply current?

  • 0 in reply to Nithin Kekuda
    TI__Expert 4860 points

    Hi Nithin, 

    According to datasheet, when Vout is equal to Vbat, the supply current (IDD) is 40uA, and the current pull from battery (IBAT) is 0.5 uA.

    Best Regards,

    Sila