In a load supply using P-MOS, the input to source is 25V. We found unfortunately that the MOSFET we chose and soldered has only 20V maximum gate-source voltage. Although there are voltage dividers consisting of R1 and R2, we are not sure upon the sudden turning on of NMOS, whether VGS could temporarily reach 25V, and whether the P-MOSFET Q1 could stand it.
We haven’t yet found MOSFETs having rated VGS>20V yet.
Questions:



http://www.diodes.com/datasheets/ZXMP6A17G.pdf


Could someone recommend PMOS having larger maximum VGS?
The application of using PMOS for high voltage switch should be common and VCC=25V is unlikely to be at the high end of typical applications. So how do applications typically handle voltage exceeding maximum VGS?


Matt


Question: I want to travel to the USA while working remotely for my non-US employer
Answer: The intent of the law is to preserve U.S. work for U.S. workers.  Everything else is fuzzy.

From the USCIS web site: "Employment — Any service or labor performed by an employee for an employer within the United States, but not including casual domestic employment or duties performed by  nonimmigrant crewmen (D-1 or D-2)."

You can't be employed on a "B" visa.  As an attorney I could argue that "within the United States" applies to the employer, but if I was prosecution and someone cared enough to push it, the phrase could apply to the physical location of the employee and be grounds for removal from the United States.

So look at the intent.  Can anything I might do take work away from legal U.S. workers?

As for user16885, I suspect that you said something in the interview that indicated you would be doing "employment".  If you have a transcript (which you don't, because there is no appeal from a State Department decision on things like this) I could probably pick it out.