WEBENCH® Tools/TPS568215: Cin Cout Lout value

Tool/software: WEBENCH® Design Tools

Our customer consider to use TPS568215.

Please check attached WEBENCH result.

<Condition>

Vin:11.5-12.5

Vout:1.0V

Io:5A

Option

　fsw:1.2MHz

　Output Cap option:Ceramic

WBDesign95.pdf

(1)Is Cin value correct ? Cin of typical application in datasheet is 22uF x4.

WBDesign95-1.pdf

(2)Cout option Electrolytic+Ceramic

　They set Co=47uFx3 and change option Electrolytic+Ceramic..

    The result is added 47uF  Electrolytic capacitor.They don't know why 47uF Electrolytic is added. 

(3)Lo = 680nH is selected in this simulation result.

   This value is different from datasheet recommend value.Please give us your comment.

   0.33uH@Vo=0.6V/fsw=1200kHz

   0.47uH@Vo=1.2V/fsw=1200kHz