SNVU698B September   2020  – December 2020 LMQ61460-Q1

 

  1.   1
  2.   Trademarks
  3. 1Introduction
    1. 1.1 LMQ61460-Q1 Synchronous Step-Down Voltage Converter
  4. 2Quick Start Guide
  5. 3Detailed Descriptions
  6. 4Schematic
    1. 4.1 Alternative BOM Configurations
  7. 5Board Layout
  8. 6LMQ61460EVM-400K Board Test Results
    1. 6.1 EMI
    2. 6.2 Board Efficiency
    3. 6.3 Load Regulation
    4. 6.4 Thermals
  9. 7Bill of Materials
  10. 8Revision History

Board Efficiency

This section provides efficiency plots for the board with LMQ61460AAS populated for Auto mode efficiency and LMQ61460AFS populated for FPWM mode efficiency. For 2.1-MHz data, the output stage has to be changed from the default BOM. The inductor (L1) selected was XEL5030-102MEB.

GUID-6A8C9D2D-19FA-4F07-BA47-8D8FE00D3178-low.gifFigure 6-7 FSW = 400 kHz, 5 VOUT, Auto Mode
GUID-E6F8A0A7-A41E-42CC-B790-5F2050508898-low.gifFigure 6-9 FSW = 400 kHz, 3.3 VOUT, Auto Mode
GUID-FAA620E2-392D-4FA2-8FA0-88F3F0A69603-low.gifFigure 6-11 FSW = 2.1 MHz, 5 VOUT, Auto Mode
GUID-D7EABF3C-8017-4EA1-93A0-539C546FBE9E-low.gifFigure 6-13 FSW = 2.1 MHz, 3.3 VOUT, Auto Mode
GUID-C551966A-894B-4E09-B239-3B3282144293-low.gifFigure 6-8 FSW = 400 kHz, 5 VOUT, FPWM Mode
GUID-8AB11E86-AC39-4957-9277-62701A22510A-low.gifFigure 6-10 FSW = 400 kHz, 3.3 VOUT, FPWM Mode
GUID-5437D4D4-11EF-4A1F-AD12-3CE96CA31D22-low.gifFigure 6-12 FSW = 2.1 MHz, 5 VOUT, FPWM Mode
GUID-708DF881-796F-496D-824F-E54D9BFCD257-low.gifFigure 6-14 FSW = 2.1 MHz, 3.3 VOUT, FPWM Mode