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TPS54116-Q1: TPS54116 VTTREF Gnd connection--AGND or PGND

Part Number: TPS54116-Q1

Hi All,

In the datasheet of TPS54116, there are something conflict for VTTREF rail Gnd connection, in the pin description, it mentions to connect ceramic capacitor to AGND, but in the schematic, it is connection to the PGND, could you please let me know, which one to connect. 

Best Regards

Charles Zhang