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TPS552882: Rsns and CDC parameters

Part Number: TPS552882

Hi all,

I have a question regarding the design of a TPS552882 Buck-Boost converter that is not clearly stated in the schematic. Is it mandatory to use the Rsns (connected between pins ISP and ISN) to compensate for the output voltage drop? Can I not leave Rsns = 0 and RCDC floating? 

Thank you for your time. Best regards,

Juan