4 PCB Layout
through
show the board layout for the LMR38020EVM. The EVM offers resistors,
capacitors, and test points to configure the output voltage, precision enable, and switching frequency.
The 8-pin SO PowerPAD™ package offers an exposed thermal pad, which must be soldered to the copper
landing on the PCB for optimal thermal performance. The PCB consists of a 4-layer design. There are 2-oz
copper planes on the top and bottom and 1-oz copper mid-layer planes to dissipate heat with an array of thermal
vias under the thermal pad to connect to all four layers.
Test points have been provided for ease of use to connect the power supply, required load, and to monitor critical
signals.
Figure 4-1. Top Layer and Silkscreen Layer
PCB Layout
8
LMR38020EVM User Guide
SNVU787 – JULY 2021
Copyright © 2021 Texas Instruments Incorporated
