SLVUCL2 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

Abstract

LM(Q)64408(-Q1), LM(Q)644A0(-Q1) and LM(Q)644A2(-Q1) Dual, Buck DC/DC Converter family provides flexibility, scalability, and optimized solution size for a wide range of applications. With integrated power MOSFETs, the device is stackable up to 6 phases for higher output currents up to 36 A, and uses a current-mode control architecture for easy loop compensation. The device supports input voltage surge up to 36 V and dip as low as 3 V. The switching frequency is adjustable from 100 kHz to 2.2 MHz using the RT pin and also can be synchronized to an external clock to eliminate beat frequencies in noise-sensitive applications. The output regulation target is programmed to a fixed 3.3 V, 5 V or adjustable using external feedback resistors. Available EMI mitigation features include spread spectrum, integrated input bypass capacitors and low package parasitic with enhanced QFN package.

Table 1-1 LM(Q)644xx(-Q1) Dual Buck DC/DC Converter Family
Part NumberRATED IOUTPACKAGEDIMENSIONS
LM(Q)64408(-Q1)4 A per channel Enhanced QFN (25)5.0 mm × 4.0 mm
LM(Q)644A0(-Q1)5 A per channel
LM(Q)644A2(-Q1)6 A per channel