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TPS3701 input current draw and input voltage with no VDD applied

William Haller
Prodigy 20 points
Other Parts Discussed in Thread: TPS3701

Hi,

I have an application which has VDD = 0 volts (the TPS3701 is not powered) but a voltage applied to both INA and INB inputs through the standard 3 resistor divider as discussed in the data sheet. The question is what is the maximum voltage which can be applied to both INA and INB with VDD = 0 volts, and what is the expected input current draw? The data sheet values are unclear if they apply to VDD = 0 volts.

Thanks,

--Bill

  • 0
    TI__Guru 55940 points
    Hi Bill,

    Due to the fact that INA and INB are simply inputs to a comparator, the expected voltage and current draw for the input pins would be the same as what they would be in the operating range of the device. Please note that with VDD = 0V, these conditions are outside of where we tested and characterized this device. The intended use case is Vdd is the recommended range of 1.8V to 36V.

    Very Respectfully,
    Ryan