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TPS22943: Load switch with protection and very Low Iq - needed

Intellectual 490 points
Vikas Thukuntla75

Part Number: TPS22943

Hi,

I am designing a water meter product that runs on a battery. I have an external flow sensor that takes very less operating current (<1mA). Since this sensor is installed externally, I want to protect my electronics from external faults on this sensor. So, I am considering a Load switch with in-built protection features similar to TPS22943. However TPS22943 has very high Iq=40uA. Because of such high Iq, my battery will drain off faster. Can you suggest similar load switch that has in-built protection features like Over-current, etc and report the same? It will be better to have much more protections features than just over-current. I do not want to use any BGA packaged parts. Kindly suggest.

Regards,

Vikas Chandra Rao.

Intellectual 490 points
Vikas Thukuntla75
  • Expert 8580 points
    Rakesh
    Hi Vikas,

    Thanks for reaching out!.
    Clearly understand your requirement of low Iq, non BGA and protection against external faults. But unfortunately, we don't have device which matches your requirements. The closet I see are load switches TPS22917, TPS22960, TPS22860.

    Best Regards,
    Rakesh
  • Intellectual 490 points
    Vikas Thukuntla75

    In reply to Rakesh:

    Hi Rakesh,

    Thanks for your suggestions. One of the important features that I am looking for, is the Fault reporting mechanism. TPS22943 has OC pin that reports about the fault. The devices that you suggested do not have any fault report mechanisms. Are there any other devices closely matching my requirements and report the Fault status? If not, are there any devices in "Preview/Pre-Production" status that I can consider? Kindly suggest.

    Regards,

    Vikas Chandra Rao.

  • Expert 8580 points
    Rakesh

    In reply to Vikas Thukuntla75:

    Hi Vikas,

    I have informed the engineer who is looking after these products to suggest other possible options for you. He will get back to you soon. Please expect some delay due to holidays and sorry for the inconvenience.

    Best Regards,
    Rakesh
  • Genius 12600 points
    Aleksandras_Kaknevicius

    In reply to Vikas Thukuntla75:

    Hi Vikas,

    Rakesh has provided some of our best alternative options since the TPS2294x devices and TPS22951 are our only current limited load switches with flag pins. The only other current limited and fault reporting devices we have are our eFuses, and you can look at the TPS2595 as a starting point.

    Thanks,

    Alek Kaknevicius

  • Intellectual 490 points
    Vikas Thukuntla75

    In reply to Aleksandras_Kaknevicius:

    Hi Alek,

    TPS2595 and other eFuses seem to have much higher Iq than TPS2294x. Indeed, TPS22946 seem to be better but the only drawback is that it is BGA package.

    Can you suggest whether I should be checking in any other forum for getting a closest matching part, if not a perfect required part? Which forum should I be checking for the same? Kindly suggest.

    Thanks & Regards,
    Vikas Chandra Rao.
  • Genius 12600 points
    Aleksandras_Kaknevicius

    In reply to Vikas Thukuntla75:

    Hi Vikas,

    There is a bit of a trade off when it comes to protection features and Iq since usually a higher Iq is needed to keep those protection features active. If the eFuses have too high Iq and the TPS2294x devices do not work, then you could always check the Switches and Multiplexers forum for a solution. Because the current is so low, they may have a signal switch that could work for this application.

    Thanks,

    Alek Kaknevicius

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