This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TUSB320: TUSB320

Part Number: TUSB320

I have a customer that is using the TUSB320 in several products. In one, they need to detect the loss of VBUS (5V power from USB). Using the recommended component values, the TUSB320 detects loss of VBUS when it falls below 3.3V. Normally that operation is fine, but in this application they want to turn on a battery boost regulator when VBUS is below 4.6V so that the attached system sees uninterrupted 5V power.

The TUSB320 data sheet suggests a value of 909K in order to set the VBUS loss threshold at 3.3V (closest 1% resistor value to 900K). The data sheet gives a typical value for Rvbus_pd of 95K. Given that, a VBUS_DET resistor value of 1.3M should set the VBUS loss threshold at ~4.6V. Is there any reason to think that the TUSB320 would not work properly with such a value?

Note, in this application they are not required to strictly adhere to the VBUS detect threshold of the USB specification.