9

Board Layout Suggestions

When laying out the printed circuit board, the following checklist should be used to ensure proper

operation of the

HM1480. Check the following in your layout.

1.

The power traces, consisting of the GND trace, the SW trace and the VIN trace should be kept

short, direct and wide.

2.

Put the input capacitor as close as possible to the device pins (VIN and GND).

3.

SW node is with high frequency voltage swing and should be kept small area. Keep analog

components away from SW node to prevent stray capacitive noise pick-up.

4.

Connect all analog grounds to a command node and then connect the command node to the power

ground behind the output capacitors.