tiwari.sachin
Full Member level 6
I need some suggestion on how can the MCU Vcc and USB Vcc and Analog Vcc can be powered up
All the above voltages are 3.3V
I am connecting 3.3V regulator outputs to all the above said Vcc... MCU Vcc and USB Vcc with a 100nF cap
Analog Vcc with a ferrite and 100nF cap before ferrite on Vcc and 100nF and 1uF after ferrite that goes to AVcc
Now products are working fine but we have products being returned and i see that Vcc and GND are short.
I got the failure analysis done from the MCU vendor and they say it could be electrical stress (over voltage or current) due to which the wires are damaged
I have the X-ray report too
Could anyone suggest me on the precautions I need to take to power up the MCU.
I have been connecting Regulator output to MCU pins all this time but this is something of new issue and I really need some expert advice
All the above voltages are 3.3V
I am connecting 3.3V regulator outputs to all the above said Vcc... MCU Vcc and USB Vcc with a 100nF cap
Analog Vcc with a ferrite and 100nF cap before ferrite on Vcc and 100nF and 1uF after ferrite that goes to AVcc
Now products are working fine but we have products being returned and i see that Vcc and GND are short.
I got the failure analysis done from the MCU vendor and they say it could be electrical stress (over voltage or current) due to which the wires are damaged
I have the X-ray report too
Could anyone suggest me on the precautions I need to take to power up the MCU.
I have been connecting Regulator output to MCU pins all this time but this is something of new issue and I really need some expert advice