P9038 LAYOUT GUIDE
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08/23/15
AN-894
Figure 12. P9038 PCB Footprint Design Guidance
Thermal Performance
PCB design can have a substantial impact on operating temperature and efficiency. In order to allow the P9038 to operate at the
lowest possible temperature, the EPAD must be connected directly to a GND plane and traces on the bottom layer should be
kept as short as possible and be routed as far away from the EPAD as possible to promote heat flow paths and heat dissipation.
Traces, vias, or voids will block heat flow and result in increased operating temperatures. The 2.1" x 1.134" reference board, as
designed, operates near 49°C when delivering 5 W.
