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IMXRT USB VBUS

Question asked by Henry Lovett on May 20, 2019
Latest reply on May 22, 2019 by Jorge Antonio Alcala Vazquez

Hi, 

 

The USB VBUS specification on the IMXRT1064 says it needs 4.4V - 5.5V which is then dropped to 3V using the internal LDO. In my application, I do not have a 5V supply as I don't need to supply it to the USB peripheral (in effect, I'm connecting to a self powered device).

Will the USB VBUS operate to 3.3V? Or can I supply 3V directly to the VCC_USB_CAP pin and not the VBUS pins? If possible, I'd like to avoid putting another entire supply down. 

 

Many thanks,

Henry 

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