Power tree sharing of two LX2160A

[Anandsharmi]

Hi,

We are planning to build a product using for gNB with two LX2160A SOCs.

We would like to know whether Power devices(each power rail of SOC) can be shared with two LX2160A.

Also please share any existing reference design with two processors.

[Bulat]

We do not have reference boards with two LX2160 processors. As a result, we do not have recommendations for power supply design for such configuration.

I believe some power sources can be common for two processors, these mainly supplies with low current consumption.

For high current power sources, like VDD, the user needs to regulate the voltage at the processor's pins (not at the pins of power source). This requires to use a feedback from the processor to the power supply, so one power source can not be used for two processors.

I would add that in our LX2RDB design several power sources besides VDD are used with feedback from the processor's pins.

Regards,

Bulat