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Board Layout

3 Board Layout

Figure 7, Figure 8 and Figure 9 show the board layout for the TPS65300EVM PWB. The EVM offers

jumpers to enable the device in various ways and to select supply rails for 3.3V and 1.2V linear regulators.

Figure 10 shows the schematic.

The TPS65300 converter offers high efficiency, but does dissipate power. The PowerPAD™ package

offers an exposed thermal pad to enhance thermal performance. This must be soldered to the copper

landing on the PCB for optimal performance. The PCB provides a GND-plane on the bottom side to

dissipate heat from the device, transferred via the PowerPad™ and thermal vias underneath the device.

The external transistors have a smaller area on the top side connected to their collector to allow heat

dissipation.

Figure 7. Top Assembly Layer

SLVU685–February 2012 TPS65300EVM

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