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What would happen if I pull down the INH pin of this IC to GND?

I am unable to understand what would happen if I pulled to GND or make it HIGH?

Can someone help me ?

1 Answers1

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What would happen if I pull down the INH pin of this IC to GND?

It's an output (not an input) so I wouldn't go pulling it low in case the internal PMOS is trying to connect it to +Vsupply. From the data sheet page 8: -

The inhibit pin provides an internal switch toward the VS pin which is protected by temperature monitoring. If the device is in normal or Fail-Safe mode, the inhibit high-side switch is turned on. When the device is in Sleep mode, the inhibit switch is turned off, thus disabling the voltage regulator or other connected external devices.

Andy aka
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  • So, could you tell me what should I connect it to if I am not using? Unable to get clarity? –  Oct 20 '22 at 12:51
  • You don't need to connect it to anything if you don't use it @Newbie – Andy aka Oct 20 '22 at 12:52
  • Ok, shall I leave it open if I am not using? –  Oct 20 '22 at 12:53
  • Look on page 8 further down. It is used to enable an external microcontroller. If you don't need that functionality just leave it open (well, I'd connect it to a test point on a PCB just in case and, I might be tempted to connect it to a 10 kohm pull-down resistor too just in case you might want to see what is on the pin). – Andy aka Oct 20 '22 at 12:55
  • Shall I connect it to a 100k pull down to GND, if I am not using it? That wouldn't be a problem right? –  Oct 20 '22 at 12:56
  • It won't be a problem at all. – Andy aka Oct 20 '22 at 12:57
  • Thank you for the answer. But could you please include this in your original answer. In your original answer, you mentioned you would not pull it low. –  Oct 20 '22 at 13:00
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    The pull-down resistor would not pull it low. In the answer I said don't pull it low and that means don't short it to ground. A pull-down resistor won't short it to ground. – Andy aka Oct 20 '22 at 13:16
  • But isn't 100k a pull-down resistor? But is 10k a pull-up resistor @Andyaka? –  Oct 20 '22 at 16:28
  • A 100 kohm resistor can be used as a pull-up or pull-down resistor. Ditto a 10 k resistor. – Andy aka Oct 20 '22 at 16:42