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FN7370.1

December 21, 2005

PCB Layout Considerations

The layout is very important for the converter to function

and GND pins. Longer traces to the LEDs are OK. Similarly,

the supply decoupling cap and the output filter cap should be

The heat of the IC is mainly dissipated through the GND pin.

Maximizing the copper area connected to this pin is

preferable. In addition, a solid ground plane is always helpful

for the EMI performance.

The demo board is a good example of layout based on the

principle. Please refer to the ISL97631 Application Brief for

the layout.

ISL97631