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TPS62095: TPS62095

Part Number: TPS62095

The issue is below:   we use TPS62095 to converte 5.0V to 2.5v,and we provide the 2.5v  to FPGA, but it couses some spurious signals interval 144KHz. If we provide a 2.5v to FPGA via DC POWER SUPPLY instead, then there is no the spurious signals interval 144KHz.

I also tried using this external DC source as input supply for the TPS62095 instead of the +5V_Block_FPGA,and the result was there were still some spurious signal every 144KHz. The spurious signals are the red lines around the blue line in the screenshot as the below attachment    (ps: the blue line is known for us,and you no need to care)

How can we eliminate the spurious signals interval 144KHz? Thank you. some screenshots are in attachment as below

(ps:the issue case is CS0090769)