Could you tell me what the maximum allowable input voltage is for the EN_VCC33 pin?
I could not find a specification dedicated to this pin in the datasheet.
The datasheet states “The other pins … –0.3 V to +4 V”, but when I look at the schematic of the evaluation board (EVM3698‑BH‑02A), this pin is pulled up to VIN, which can go up to 16 V on the evaluation board.
This makes me wonder whether the EN_VCC33 pin can actually tolerate voltages up to the VIN level on the EVM, or if the absolute maximum is still limited to +4 V as described for “other pins.”
Could you clarify the correct maximum input voltage rating for the EN_VCC33 pin?
Hello Ken,
Apologies for the delayed response. This is the following description of the pin as specified in the MPM3698 datasheet:
As for that note in the datasheet, this must be what you are referring to:
On page 12, the datasheet mentions the following internal pull-down resistor:
This is meant to manage the voltage at EN_VCC33 to ensure the voltage doesn’t exceed 4V.
Best,
Krishan
Thank you for your response.
In the evaluation board schematic, the EN_VCC33 pin is pulled up with a 100 kΩ resistor. You mentioned that the EN_VCC33 pin is pulled down with 1 MΩ.
Based on this, the EN_VCC33 pin voltage will exceed 4 V. Wouldn’t that be an issue?
Hello again Ken,
Let me consult some colleagues on this subject. We have not seen issues with this module before, especially with EN_VCC33 and its configuration as shown in the EVB schematic. You’ll hear back from me in this thread soon.
Best,
Krishan
