A Board-level 10-Watt Step-down Buck Converter

1 A Board-level 10 Watt Step-down Buck Converter 

Maximum output current Output ripple voltage Output regulation  

Output power Input power Power switeh loss Cateh diode loss  

The worst ease operating eondition is at the high input voltage. 

The induetor is to be a surfaee mount toroid on a J-leaded plastie mounting board. There are standard surfaee mount induetors available from many suppliers. I have ehosen the part D03340P-104 from Coileraft. 

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