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TPS22917: Load switch used as a level translator

TISL
Expert 4630 points
Part Number: TPS22917

Dear Support,

My customer is looking for a 1.8V to 5V level translator, with a low quiescent current and just one power supply. The 1.8V signal is a simple information 0 or 1, with no specific data rate and doesn't need any specific output current (just used to bias another IC).

We get the idea to use the TPS22917, applying a 5V on Vin and the signal on the input "ON".

Do you confirm that the input thresholds allow this kind of use?

Do you see anything which is not recommended in that case?

Regards,

  • 0
    TI__Genius 13760 points

    Hello,

    Thank you for reaching out to the E2E forum!

    The TPS22917 has an ON pin high level input voltage threshold of 1V minimum. This means that the 1.8V is enough to enable the load switch and output the 5V source if you connect it to the VIN pin. Furthermore, the device does have a low level input voltage for the ON pin of 0.35V. This means that once the device is enabled the voltage on the ON pin would have to drop lower than 0.35V for the device to turn off. This will keep your system operating even if there is some slight fluctuations on the 1.8V rail.

    At this point I see no flaw in the design. If you encounter any issues do reach out, either in a new thread or keep commenting on this post.

    Regards,

    Andy Robles