Resistor divider not accurate of Load Switch for Peripherals on i.MX8QXP MEK board.

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Resistor divider not accurate of Load Switch for Peripherals on i.MX8QXP MEK board.

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question2click6
Contributor II

Resistor divider not accurate of Load Switch for Peripherals on i.MX8QXP MEK board.

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Can you help to give a explaination on it?

best wishes,

Wenwen

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2 Replies

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Rita_Wang
NXP TechSupport
NXP TechSupport

Hi Wen,

   Vgs=3.3x10/(47+10)-3.3 = -2.72V

 

B.R,

Rita

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434 Views
question2click6
Contributor II

Hi Rita,

The worst case to OPEN this PMOS shoule be VGS<-3V, if we only have a -2.7V on Gate pin, the MOSFET will keep closed. So this circuit will not work. Please check, Thanks!

Regards,

Wenwen

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