Hi,
I have a design with MPQ8875A converter. I have watched in its datasheet, in “ABSOLUTE MAXIMUM RATINGS” paragraph (page 7) that the maximum voltage for this pin is 5,5V (All other pins … -0.3V to +5.5V)
BUT in several examples of design (pages 63, 64), it has a Pull-Up to VIN (up to 36V).
I would like to clarify the maximum voltage that I can apply to EN pin.
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Hello @jjvv ,
The EN pin will be able to handle up to the abs max of PVIN, 42V. The evaluation board shows a design with the MPQ8875A that has been tested, so as long as Vin is within the recommended range it can be used as a pull up for EN.
Apologies for the confusion from our end regarding EN maximum voltage.
Hope this helps!
Regards,
Jonathan
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Ok, thanks for your answer!
Thanks. Hope MPQ8875A datasheet updated soon.
I would be surprised if it didn’t blow up. The eval board shows also a current limiting resistor.
Typically the EN pin has a 6V ish ESD protection device like a zener on it. If you apply high voltage from a low impedance source it will blow, if you apply high voltage through a current limiting resistor the EN pin will sit at 6V or so the part will operate and not blow up.