SNVA381B November   2008  – December 2021 LM27341 , LM27341-Q1 , LM27342 , LM27342-Q1

 

  1.   Trademarks
  2. 1Introduction
  3. 2Evaluation Board Schematic
  4. 3Powering and Loading Considerations
    1. 3.1 Quick Start Procedure
    2. 3.2 Starting Up
    3. 3.3 Overcurrent Protection
    4. 3.4 Synchronization
    5. 3.5 Adjusting the Output Voltage
  5. 4Performance Characteristics
  6. 5Layout and Bill of Materials
  7. 6PCB Layout
  8. 7Revision History

4 Performance Characteristics

Efficiency Plots

Figure 4-1 shows the conversion efficiency versus output current for several input voltage conditions.

GUID-84A201A8-47CF-408A-8E09-37A29A732EC7-low.pngFigure 4-1 Conversion Efficiency Versus Output Current

Turn-On Waveform

When applying power to the LM27342 evaluation board a soft-start sequence occurs. Figure 4-2 shows the output voltage during a typical start-up sequence.

GUID-9114E7E2-A87E-4A91-BDE0-691487726738-low.png
Output Current = 1A
Figure 4-2 Output Voltage During a Typical Start-Up Sequence