SLVU157A March   2006  – October 2021 TPS5430 , TPS5431

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Background
    2. 1.2 Performance Specification Summary
    3. 1.3 Modifications
      1. 1.3.1 Output Voltage Set Point
  3. 2Test Setup and Results
    1. 2.1 Input/Output Connections
    2. 2.2 Efficiency
    3. 2.3 Output Voltage Load Regulation
    4. 2.4 Output voltage Line Regulation
    5. 2.5 Load Transients
    6. 2.6 Loop Characteristics
    7. 2.7 Output Voltage Ripple
    8. 2.8 Input Voltage Ripple
    9. 2.9 Powering Up
  4. 3Board Layout
    1. 3.1 Layout
  5. 4Schematic and Bill of Materials
    1. 4.1 Schematic
    2. 4.2 Bill of Materials
  6. 5Revision History

2.2 Efficiency

The efficiency for both EVMs peak at a load current of about 0.75 A and then decrease as the load current increases towards full load. Figure 2-1 shows the efficiency for the TPS5430EVM-173 at an ambient temperature of 25°C.

GUID-649C0F34-FE94-448F-B776-49F9BAD6A499-low.gifFigure 2-1 TPS5430 Efficiency

Figure 2-2 shows the efficiency for the TPS5431EVM-173 at an ambient temperature of 25°C.

GUID-C10BE31E-4D8E-436A-8E6C-77A23410D541-low.gifFigure 2-2 TPS5431 Efficiency

The efficiency is lower at higher ambient temperatures, due to temperature variation in the drain-to-source resistance of the MOSFETs.