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LM2788MM-2.0 Datasheet(PDF) 11 Page - National Semiconductor (TI) |
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LM2788MM-2.0 Datasheet(HTML) 11 Page - National Semiconductor (TI) |
11 / 12 page Application Information (Continued) Even under these peak power dissipation and ambient tem- perature conditions, the junction temperature of the LM2788 is below the maximum operating rating of 125˚C. As an additional note, the ambient temperature operating rating range listed in the specifications is provided merely for convenience. The LM2788 may be operated outside this rating, so long as the junction temperature of the device does not exceed the maximum operating rating of 125˚C. Layout Guidelines Proper board layout to accommodate the LM2788 circuit will help to ensure optimal performance. The following guide- lines are recommended: • Place capacitors as close to the LM2788 as possible, and preferably on the same side of the board as the IC. • Use short, wide traces to connect the external capacitors to the LM2788 to minimize trace resistance and induc- tance. • Use a low resistance connection between ground and the GND pin of the LM2788. Using wide traces and/or mul- tiple vias to connect GND to a ground plane on the board is most advantageous. Figure 2 is a sample single-layer board layout that accom- modates the LM2788 typical application circuit, as pictured on the cover of this datasheet 20044424 FIGURE 2. Sample single-layer board layout of the LM2788 Typical Application Circuit (Vias to a ground plane, assumed to be present, are located in the center of the LM2788 footprint.) www.national.com 11 |
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