Advanced Analog Technology, Inc.
April 2007
AAT1164/AAT1164B/AAT1164C
Feedback
If external compensation components are needed for
stability, they should also be placed close to the IC.
Take care to avoid the feedback voltage-divider
resistors’ trace near the SW. Minimize feedback track
lengths to avoid the digital signal noise of TFT control
board.
Ground Plane
The grounds of the IC, input capacitors, and output
capacitors should be connected close to a ground plane.
It would be a good design rule to have a ground plane
on the PCB. This will reduce noise and ground loop
errors as well as absorb more of the EMI radiated by the
inductor. For boards with more than two layers, a
ground plane can be used to separate the power plane
and the signal plane for improved performance.
PC Board Layout
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Advanced Analog Technology, Inc. –
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