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TPS61288: SW quiescent current

Blaž Kvas
Prodigy 50 points
Part Number: TPS61288

Hi,

I am designing a backup power supply system with supercaps where leakage currents are very important.

I looked through the datasheet but I couldn't find the leakage current into the SW pin when EN is low. Can you please direct me to a correct location for this specification?

Vin in this case is also disconnected with a switch to limit leakage currents from supercaps.

Regards,

Blaz

  • +1
    TI__Genius 12495 points

    Hi Blaz,

    When EN is low, the device stops switching and there will be only current flew into Vin Pin.

    Please take care that when EN is low, Vo voltage will be around input voltage as the device gets a body diode from SW to Vo.

    So, for the SW current, it includes the FB load current and output leakage current.

    Best Regards,

    Fergus