4 Board Layout

Figure 4-1 through Figure 4-8 illustrate the board layout for the TPS7B4255EVM-062 PCB.

The TPS7B4255EVM-062 dissipates power, which may cause some components to experience an increase in temperature. The TPS7B4255-Q1 LDO and pulsed resistors R9, R10, R11, R12, and R13 are most at risk of raising the junction temperature during normal operation. The LDO may become hot to the touch during normal operation; see the thermal impedance discussion in the TPS7B4255-Q1 data sheet.

Figure 4-1 Top Assembly Layer and Silkscreen

Figure 4-3 Internal Layer 1

Figure 4-5 Internal Layer 3

Figure 4-7 Bottom Layer Routing

Figure 4-2 Top Layer Routing

Figure 4-4 Internal Layer 2

Figure 4-6 Internal Layer 4

Figure 4-8 Bottom Assembly Layer and Silkscreen