Dear Team,
The specifications for all the 3V3 power rails were set at 3.0V to 3.6V except for VDD_USB_3P3. According to the specifications, the voltage range for VDD_USB_3P3 should be between 3.069V and 3.6V.
We have observed that the voltage minimum drops to 3.049V under full load, which does not meet the VDD_USB_3P3 specification.
Considering that VDD_USB_3P3 is intended to power the USB function, if we are not utilizing the USB function, can we disregard this failure?
| Volt (V) | Probe point | DUT | DC Voltage Vrms (V) | DC Voltage Vmax (V) | DC Voltage Vmin (V) | DC Voltage Criteria (V) |
| 3.3 | TP633 | idle | 3.3 | 3.318 | 3.292 | 3.069~3.6 |
| 3.3 | TP633 | full-load | 3.296 | 3.35 | 3.049 | 3.069~3.6 |
| 3.3 | TP633 | idle | 3.3 | 3.31 | 3.287 | 3.069~3.6 |
| 3.3 | TP633 | ful-load | 3.29 | 3.358 | 3.041 | 3.069~3.6 |
Please advise.
Hello,
If you are not using USB function, this should not be an issue but, please check that you are following the correct power-up sequence and volage levels at boot.
Best regards.