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TLIN1029A-Q1: EN pin leakage current interpretation

Sri Viswa Sathiamoorthy
Prodigy 195 points
Part Number: TLIN1029A-Q1

Tool/software:

Hi,

We are planning to remove external pull-down resistance for EN pin.

To analyze the impact of removing, we need following info,

  • -5uA/+5uA leakage current is specified when EN=0: Whether the leakage current flows through the 800kohm resistor?
  • MCU pin connected to EN pin of TLIN1029 has a leakage current of 0.5uA. When the MCU pin is floating, 0.5uA leakage current flowing through 800kohm from MCU causes voltage to be 0.4V at EN pin. Do you see any leakage current from TLIN1029 in addition to 0.5uA MCU leakage current from TLIN1029 may cause turn ON of TLIN1029?

Is it ok to rely on internal pull down resistance in this case to avoid false turn-on when MCU is not driving the EN pin?

Thanks

  • +1
    TI__Guru 51636 points

    Hi Sri,

    Yes, 0.4 V is well below the VIL spec of the EN pin and will be considered a low. Hence, can rely on the internal pull-down, thanks.

    • Yes, the leakage path includes the path through the 800 kohms.
    • No, 0.4 V is below 0.8 V VIL and will be considered a valid low as 2 V VIH will be needed for a valid high.

    Best Regards,

    Michael.