SLVUCA5 June   2022

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
    1. 1.1 Before You Begin
  4. 2TPS7B4255EVM-062 Schematic
  5. 3Setup
    1. 3.1 LDO Input/Output Connector Descriptions
      1. 3.1.1 VIN and GND
      2. 3.1.2 VOUT and GND
      3. 3.1.3 EN
    2. 3.2 Optional Load Transient Input/Output Connector Descriptions
      1. 3.2.1 VDD and GND
      2. 3.2.2 J15
      3. 3.2.3 J18
      4. 3.2.4 J19
      5. 3.2.5 J21
      6. 3.2.6 J22
      7. 3.2.7 J23
      8. 3.2.8 J26
      9. 3.2.9 TP3
    3. 3.3 TPS7B4255-Q1 LDO Operation and Component Selection
    4. 3.4 Optional Load Transient Circuit Operation
  6. 4Board Layout
  7. 5Bill of Materials

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