SLVUD36 November   2024 LM25190-Q1

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 Test Setup and Procedure
      1. 2.1.1 EVM Connections
      2. 2.1.2 Test Equipment
      3. 2.1.3 Recommended Test Setup
        1. 2.1.3.1 Input Connections
        2. 2.1.3.2 Output Connections
      4. 2.1.4 Test Procedure
        1. 2.1.4.1 Basic Test Procedure
  8. 3Implementation Results
    1. 3.1 Test Data and Performance Curves
      1. 3.1.1 Efficiency
      2. 3.1.2 Operating Waveforms
        1. 3.1.2.1 Start-Up and Shutdown With EN
        2. 3.1.2.2 Switching
        3. 3.1.2.3 Load Transient (CV), ISET Modulation (CC)
      3. 3.1.3 Thermal Performance
      4. 3.1.4 Bode Plot
      5. 3.1.5 EMI Performance
  9. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials
  10. 5Additional Information
    1. 5.1 Trademarks
  11. 6Device and Documentation Support
    1. 6.1 Device Support
      1. 6.1.1 Development Support
    2. 6.2 Documentation Support
      1. 6.2.1 Related Documentation
        1. 6.2.1.1 PCB Layout Resources
        2. 6.2.1.2 Thermal Design Resources

1.1 Introduction

The LM25190QEVM-2100 EVM is a synchronous buck DC/DC regulator with constant-current constant-voltage (CCCV) regulation. The EVM operates over a wide input voltage range of 5.5V to 42V (VIN terminal), providing a regulated current of 5A in CC mode and a regulated voltage of 5V in CV mode. The average inductor current is programmed by controlling the ISET pin voltage and the output voltage is adjusted by modifying the feedback resistor values.

The EVM supports internal (for the fixed 5V, 12V) or external feedback, selectable DRSS, FPWM/PFM selection jumper and injection point for CV mode loop response measurement. The free-running switching frequency is 2100kHz and is synchronizable to an external clock signal at a higher or lower frequency. External feedback resistors and 50Ω injection resistor can be populated to measure the loop response in CV mode.