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TPS54312-Q1 Datasheet(PDF) 10 Page - Texas Instruments |
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TPS54312-Q1 Datasheet(HTML) 10 Page - Texas Instruments |
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10 / 20 page  TPS54311-Q1, TPS54312-Q1 TPS54313-Q1, TPS54314-Q1 TPS54315-Q1, TPS54316-Q1 SGLS242G − OCTOBER 2004 − REVISED SEPTEMBER 2008 www.ti.com 10 web site under the TPS54314 product folder and in the application note, Texas Instruments literature number SLVA111. LAYOUT CONSIDERATIONS FOR THERMAL PERFORMANCE For operation at full rated load current, the analog ground plane must provide adequate heat dissipating area. A 3 inch by 3 inch plane of 1 ounce copper is recommended, though not mandatory, depending on ambient temperature and airflow. Most applications have larger areas of internal ground plane available, and the PowerPAD should be connected to the largest area available. Additional areas on the top or bottom layers also help dissipate heat, and any area available should be used when 3 A or greater operation is desired. Connection from the exposed area of the PowerPAD to the analog ground plane layer should be made using 0.013 inch diameter vias to avoid solder wicking through the vias. Six vias should be in the PowerPAD area with four additional vias located under the device package. The size of the vias under the package, but not in the exposed thermal pad area, can be increased to 0.018. Additional vias beyond the ten recommended that enhance thermal performance should be included in areas not under the device package. Minimum Recommended Exposed Copper Area For Powerpad. 5mm Stencils may Require 10 Percent Larger Area 0.2454 0.0150 0.06 0.0256 0.1700 0.1340 0.0620 0.0400 0.0400 0.0400 0.0600 0.0227 0.0600 0.1010 6 PL ∅ 0.0130 4 PL ∅ 0.0180 Connect Pin 1 to Analog Ground Plane in This Area for Optimum Performance Minimum Recommended Top Side Analog Ground Area Minimum Recommended Thermal Vias: 6 × .013 dia. Inside Powerpad Area 4 × .018 dia. Under Device as Shown. Additional .018 dia. Vias May be Used if Top Side Analog Ground Area is Extended. 0.2560 Figure 11. Recommended Land Pattern for 20-Pin PWP PowerPAD |
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Similar Description - TPS54312-Q1 |
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