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 Answer
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10 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.
- \$\begingroup\$ So, could you tell me what should I connect it to if I am not using? Unable to get clarity? \$\endgroup\$user220456– user2204562022-10-20 12:51:46 +00:00Commented Oct 20, 2022 at 12:51
- \$\begingroup\$ You don't need to connect it to anything if you don't use it @Newbie \$\endgroup\$Andy aka– Andy aka2022-10-20 12:52:55 +00:00Commented Oct 20, 2022 at 12:52
- \$\begingroup\$ Ok, shall I leave it open if I am not using? \$\endgroup\$user220456– user2204562022-10-20 12:53:12 +00:00Commented Oct 20, 2022 at 12:53
- \$\begingroup\$ 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). \$\endgroup\$Andy aka– Andy aka2022-10-20 12:55:17 +00:00Commented Oct 20, 2022 at 12:55
- 1\$\begingroup\$ 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. \$\endgroup\$Andy aka– Andy aka2022-10-20 13:16:22 +00:00Commented Oct 20, 2022 at 13:16