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TPS62748: Maximum current in 100% duty cycle mode (for LiPo based application)

Theo Meyer
Prodigy 85 points
Part Number: TPS62748
Other Parts Discussed in Thread: TPS62840, TPS62808

Hi,

I would like to use the TPS62748 to regulate a 3.7V lithium polymer battery to 3V. The system could consume up to 350mA but will be mostly in low power mode (10µA). In the datasheet it seems that below Vout+0.7V the current is limited but it does not state what current can be achieved with lower headroom. What current can I expect at 3.2V input for 3V output?

  • 0
    TI__Guru**** 150650 points

    Hi Theo,

    No, it is not recommended to draw this much current with Vin close to Vout.

    However, we recently previewed TPS62840 which does not have this restriction.  Please have a look at this one as it supports higher current and has much lower Iq.  Samples and EVMs are available. 

    We also have TPS62808/2, which offer smallest size and much lower Rdson FETs for higher currents.