ACT8810
Active- Semi
Rev 4, 01-Oct-09
STEP-DOWN DC/DC CONVERTERS
FUNCTIONAL DESCRIPTION CONT’D
close as possible to the IC, and avoiding the use of
vias if possible. The inductor, input filter capacitor, and
output filter capacitor should be connected as close
together as possible, with short, direct, and wide
traces. The ground nodes for each regulator’s power
loop should be connected at a single point in a star-
ground configuration, and this point should be
connected to the backside ground plane with multiple
vias. The output node for each regulator should be
connected to its corresponding OUTx pin through the
shortest possible route, while keeping sufficient
distance from switching nodes to prevent noise
injection. Finally, the exposed pad should be directly
connected to the backside ground plane using multiple
vias to achieve low electrical and thermal resistance.
Innovative PowerTM
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