Texas Instruments TPS54521EVM-607, User Manual

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User’s Guide
TPS54521 Step-Down Converter Evaluation Module User's
Guide
Table of Contents
1 Introduction ............................................................................................................................................................................. 3
1.1 Background........................................................................................................................................................................ 3
1.2 Performance Specification Summary................................................................................................................................. 3
1.3 Modifications...................................................................................................................................................................... 4
2 Test Setup and Results .......................................................................................................................................................... 5
2.1 Input / Output Connections................................................................................................................................................ 5
2.2 Efficiency............................................................................................................................................................................ 6
2.3 Output Voltage Load Regulation........................................................................................................................................ 7
2.4 Output Voltage Line Regulation......................................................................................................................................... 7
2.5 Load Transients.................................................................................................................................................................. 8
2.6 Loop Characteristics.......................................................................................................................................................... 8
2.7 Output Voltage Ripple........................................................................................................................................................ 9
2.8 Input Voltage Ripple........................................................................................................................................................... 9
2.9 Powering Up..................................................................................................................................................................... 10
2.10 Hiccup Overcurrent Mode Operation.............................................................................................................................. 11
2.11 Thermal Characteristics.................................................................................................................................................. 11
3 Board Layout ......................................................................................................................................................................... 13
3.1 Layout.............................................................................................................................................................................. 13
3.2 Estimated Circuit Area..................................................................................................................................................... 14
4 Schematic and Bill of Materials ........................................................................................................................................... 15
4.1 Schematic........................................................................................................................................................................ 15
4.2 Bill of Materials................................................................................................................................................................. 17
5 Revision History ................................................................................................................................................................... 17
List of Figures
Figure 2-1. TPS54521EVM-607 Efficiency.................................................................................................................................. 6
Figure 2-2. TPS54521EVM-607 Low Current Efficiency.............................................................................................................. 6
Figure 2-3. TPS54521EVM-607 Load Regulation....................................................................................................................... 7
Figure 2-4. TPS54521EVM-607 Line Regulation........................................................................................................................ 7
Figure 2-5. TPS54521EVM-607 Transient Response................................................................................................................. 8
Figure 2-6. TPS54521EVM-607 Loop Response........................................................................................................................ 8
Figure 2-7. TPS54521EVM-607 Output Ripple........................................................................................................................... 9
Figure 2-8. TPS54521EVM-607 Input Ripple.............................................................................................................................. 9
Figure 2-9. TPS54521EVM-607 Start-Up Relative to V
IN
......................................................................................................... 10
Figure 2-10. TPS54521EVM-607 Start-Up Relative to Enable.................................................................................................. 10
Figure 2-11. TPS54521EVM-607 Overcurrent Hiccup Mode..................................................................................................... 11
Figure 2-12. TPS54521EVM-607 Thermal Image...................................................................................................................... 11
Figure 2-13. TPS54521EVM-607 Junction Temperature vs Load Current................................................................................ 12
Figure 3-1. TPS54521EVM-607 Top-Side Layout (Top View).................................................................................................... 13
Figure 3-2. TPS54521EVM-607 Layer 2 (X-Ray Top View)....................................................................................................... 13
Figure 3-3. TPS54521EVM-607 Layer 3 (X-Ray Top View)....................................................................................................... 14
Figure 3-4. TPS54521EVM-607 Bottom-Side Layout (Bottom View)........................................................................................ 14
Figure 3-5. TPS54521EVM-607 Top-Side Assembly................................................................................................................. 14
Figure 4-1. TPS54521EVM-607 Schematic............................................................................................................................... 16
List of Tables
Table 1-1. Input Voltage and Output Current Summary............................................................................................................... 3
Table 1-2. TPS54521EVM-607 Performance Specification Summary......................................................................................... 3
Table 1-3. Output Voltages Available........................................................................................................................................... 4
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SLVU379A – AUGUST 2010 – REVISED AUGUST 2021
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TPS54521 Step-Down Converter Evaluation Module User's Guide 1
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