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TPS61299: Minimizing Input Current Ripple

Part Number: TPS61299

I am trying to design a boost converter module that will take a 1.6 V input source, with a capacity on the order of 1 mAh, and boost the output voltage to 1.8 or 3.3 V.  The output load current for my application will be between 1-10 mA.  However, the capacity of my input battery power source reduces significantly when there are large current spikes.  I am currently using the TPS61299, and on the data sheet, it says that it operates with a fixed inductor ripple current of 350 mA.  When I test my battery source with the TPS61299 evaluation board, I find that the battery life is significantly lower than expected, likely due to these current spikes.  Is there a way I can reduce the input current ripple, ideally at least by an order of magnitude?  I am open to using other boost converter devices outside of the TPS61299 if necessary.

  • Hi Nikhil ,

    You can reduce the input current ripple by adding more capacitors on the input. 

    Note that electrolytic capacitors have large leakage current and are therefore not recommend since you are using a very small battery on the input.

    Best Regards,

    Travis