SNVU739A October   2020  – August 2021 LM5157-Q1

 

  1.   Trademarks
  2. 1Features and Electrical Performance
    1. 1.1 Electrical Parameters
    2. 1.2 Configuration Points
  3. 2Application Schematic
  4. 3EVM Picture
  5. 4Test Setup and Procedure
    1. 4.1 Test Setup
    2. 4.2 Test Equipment
  6. 5Test Results
    1. 5.1 Efficiency Curve
    2. 5.2 Load Regulation Curve
    3. 5.3 Thermal Performance
    4. 5.4 Steady State Waveforms
    5. 5.5 Start-Up Waveforms
    6. 5.6 Load Transient Waveforms
    7. 5.7 AC Loop Response Curves
  7. 6Design Files
    1. 6.1 Schematic
    2. 6.2 Bill of Materials
  8. 7Revision History

1 Features and Electrical Performance

The LM5157EVM-BST supports the following features and performance capabilities:

  • Tightly regulated output voltage of 12 V with 1% accurate reference voltage
  • High conversion efficiency of > 92% at full load
  • Constant cycle-by-cycle peak inductor current limit over input voltage range
  • Programmable hiccup mode for output overcurrent protection
  • User-adjustable soft-start time using CSS
  • Output overvoltage protection
  • Multiple BIAS pin and VCC pin connections to test multiple configurations
    • BIAS connect to VCC
    • BIAS supplied with external power supply
    • BIAS supplied by output voltage
  • Power-good (PGOOD) indicator with selectable pullup source
  • 2.1-MHz switching frequency
  • External clock synchronization
  • Programmable dual random spread spectrum reduces the EMI