SNVA870A March   2019  – April  2020 LM25143 , LM25143-Q1 , LM5143 , LM5143-Q1 , LM5143A-Q1

 

  1.   LM5143-Q1 4-phase Buck Regulator Design for Automotive ADAS Applications
    1.     Trademarks
    2. 1 High Density Reference Design Description
      1. 1.1 Typical Applications
      2. 1.2 Features and Electrical Performance
    3. 2 Design Specifications
    4. 3 Application Circuit Diagram
    5. 4 Photo
    6. 5 Test Data and Performance Curves
      1. 5.1 Conversion Efficiency
    7. 6 EVM Documentation
      1. 6.1 Schematic
      2. 6.2 Bill of Materials
      3. 6.3 PCB Layout
    8. 7 Device and Documentation Support
      1. 7.1 Device Support
        1. 7.1.1 Development Support
      2. 7.2 Documentation Support
        1. 7.2.1 Related Documentation
          1. 7.2.1.1 PCB Layout Resources
          2. 7.2.1.2 Thermal Design Resources
  2.   Revision History

1 High Density Reference Design Description

The LM5143-Q1EVM-2100 high-density EVM is designed to use a regulated or non-regulated high-voltage input rail ranging from 8 V to 18 V to produce a tightly-regulated output voltage of 5 V at a load current up to 30 A. This wide VIN range DC/DC solution offers outsized voltage rating and operating margin to withstand supply rail voltage transients.

The free-running switching frequency is 2.1 MHz and is synchronizable to an external clock signal at a higher or lower frequency. The selected power-train passive components, including buck inductors and ceramic input and output capacitors, are automotive AEC-Q200 rated and are available from multiple component vendors.