Other Parts Discussed in Thread: UCD90120
Hi, In one of our project we are using LMZ31704 power module (same as ZC706 design). Below design 30th Pin mentioned ALWAYS ENABLED. Is this module requires enable pin for Enable the power module (LMZ31704)?
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Hi Vydha,
The INH pin has an internal pull-up current of 1.15 µA. This means if the pin is left floating, the device will be enabled by default. However, this pull-up current is somewhat weak and you would need to make sure to not load the pin with more then 1-MΩ of resistance. If this pin is loaded too much, the internal pull-up current would not be enough to pull the INH pin above its 1.3-V minimum voltage required to turn it on.
Let me know if you have any further question.
Anthony
Hi VYDHA REKHAA,
I see you rejected this as being resolved. Could you let me know what additional questions you have?
Hi Rekha,
Yes, I would recommend that if it's an option in your application. You can also use a resistor divider to VIN to ensure enough current to pull-up the pin. Whichever is easiest.