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LM25149-Q1EVM-2100: 3.3V output

Part Number: LM25149-Q1EVM-2100

Hi, team

When set output to 3.3V, Do I need to both connect FB to VDDA and VCCX to GND? Is VCCX to GND must have? 

  • hi, 

    For 3.3 V is feasible simply by connecting FB to VDDA ,VCCX is optional input for an external bias supply , in use of fix 3.3V output, tie VCCX to GND is must to have..

    please refer to datasheet section 9.2, and pin function table.