SNVU838A October   2022  – November 2022 LMR51450

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
    1. 1.1 LMR51450 Synchronous Step-Down Voltage Converter
    2. 1.2 LMR51450 Evaluation Module
  4. 2Quick Start
  5. 3Detailed Descriptions
    1. 3.1 Connectors
    2. 3.2 Jumpers
  6. 4Schematic
  7. 5Board Layout
  8. 6Bill of Materials
  9. 7Revision History

Board Layout

Figure 5-1 through Figure 5-6 show the board layout for the LMR51450 EVM. The EVM offers resistors, capacitors, and test points to configure the following:

  • Output voltage
  • Precision enable
  • Set frequency

The 12-pin WSON package offers a very small solution size. 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 to connect to all four layers.

Test points have been provided for ease of use to connect the power supply and required load, and to monitor critical signals.

GUID-20220920-SS0I-ZLDT-XCCB-C39QRCFLQR9T-low.pngFigure 5-1 Top 3D View
GUID-20220921-SS0I-KXWF-CJDQ-NVMKJ0XHHVJZ-low.pngFigure 5-3 Signal Layer 1 - Ground Plane
GUID-20220921-SS0I-QJQ4-MF87-XJMDG56WCFL3-low.pngFigure 5-5 Bottom Layer
GUID-20220921-SS0I-0V02-68LT-FVJWRWWLZL1Q-low.pngFigure 5-2 Top Layer
GUID-20220921-SS0I-FPXQ-MN2V-F03Q2RJCVK41-low.pngFigure 5-4 Signal Layer 2 - Routing
GUID-20220920-SS0I-XH01-9HZ5-9BMDPNSM8HCX-low.pngFigure 5-6 Bottom 3D view