SLVUCH5 july   2023 LMQ64480-Q1 , LMQ644A0-Q1 , LMQ644A2-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1EVM Description
    1. 1.1 Features and Electrical Performance
  5. 2EVM Performance and Specifications
  6. 3EVM Photo
  7. 4Test Setup and Procedure
    1. 4.1 EVM Connections
    2. 4.2 Test Equipment
    3. 4.3 EVM Setup
      1. 4.3.1 Input Connections
      2. 4.3.2 Output Connections
  8. 5Test Data and Performance Curves
    1. 5.1 Efficiency and Load Regulation Performance
    2. 5.2 Waveforms and Plots
    3. 5.3 EMI Performance
    4. 5.4 Thermal Performance
  9. 6EVM Documentation
    1. 6.1 Schematic
    2. 6.2 Bill of Materials
    3. 6.3 PCB Layout
  10. 7Device and Documentation Support
    1. 7.1 Device Support
      1. 7.1.1 Development Support
        1. 7.1.1.1 Custom Design With WEBENCH® Tools
    2. 7.2 Documentation Support
      1. 7.2.1 Related Documentation

1.1 Features and Electrical Performance

  • Dual 6-A outputs synchronous buck converter
  • Wide operating range of up to 36 V
  • Default output voltages: 5 V (CH1) and 3 V (CH2)
  • Default switching frequency: 2.1 MHz
  • High efficiency across a wide load-current range
  • Input EMI filter with electrolytic capacitor for parallel damping (input filter can handle up to 8-A input current)
  • Clock synchronization and FPWM mode provide constant switching frequency across the full load range
  • Integrated input capacitors enable low-noise switching performance
  • Pin selectable spread spectrum
  • Peak current-mode control architecture with integrated loop compensation.
  • Peak current limiting with hiccup-mode overcurrent protection
  • Thermal shutdown protection with hysteresis
  • PGOOD indicator
  • Programmable input UVLO
  • 6-layer, 2-oz PC board design