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LPC4370 - Voltage divider on USB0_VBUS really required?

Question asked by Mattia Dell'Oca on Aug 24, 2018
Latest reply on Aug 29, 2018 by Mattia Dell'Oca

Dear All,


I’m using an LPC4370 in a device which is self powered and is used only as an USB device.

At the moment USB pins are directly connected to the USB external line, so USB0_VBUS has a 5V voltage when USB is PLUGGED.

I saw that in my case a voltage divider is recommended because there could be the possibility to have 5V on USB0_VBUS pin when the device is turned off.

In your opinion/experiences is it really necessary? At the moment I haven’t broken USB port yet.

Could it depend on device to device and I’m just lucky now?

Should I review the design?

Best Regards,