User’s Guide
TPS548A20 SWIFT™ Step-Down Converter Evaluation
Module User's Guide
Table of Contents
1 Introduction.............................................................................................................................................................................2
2 Description.............................................................................................................................................................................. 3
2.1 Typical Applications............................................................................................................................................................3
2.2 Features............................................................................................................................................................................. 3
3 Electrical Performance Specifications................................................................................................................................. 4
4 Schematic................................................................................................................................................................................5
5 Test Setup................................................................................................................................................................................7
5.1 Test Equipment.................................................................................................................................................................. 7
5.2 Recommended Test Setup.................................................................................................................................................8
6 Configurations........................................................................................................................................................................ 9
6.1 Switching Frequency Selection.......................................................................................................................................... 9
6.2 Mode Selection.................................................................................................................................................................. 9
6.3 VDD Pin Supply Selection................................................................................................................................................10
7 Test Procedure...................................................................................................................................................................... 11
7.1 Line and Load Regulation and Efficiency Measurement Procedure.................................................................................11
7.2 Control-Loop Gain and Phase-Measurement Procedure................................................................................................. 11
7.3 List of Test Points............................................................................................................................................................. 12
7.4 Equipment Shutdown....................................................................................................................................................... 12
8 EVM Assembly Drawing and PCB Layout.......................................................................................................................... 13
9 Bill of Materials..................................................................................................................................................................... 17
10 Revision History................................................................................................................................................................. 18
List of Figures
Figure 4-1. TPS548A20EVM-737 Schematic.............................................................................................................................. 6
Figure 5-1. Tip and Barrel Measurement for Output Voltage Ripple............................................................................................7
Figure 5-2. TPS548A20EVM-587 Top Layer for Test Setup........................................................................................................ 8
Figure 8-1. TPS548A20EVM-587 Top-Layer Assembly Drawing.............................................................................................. 13
Figure 8-2. TPS548A20EVM-587 Bottom-Layer Assembly Drawing.........................................................................................13
Figure 8-3. TPS548A20EVM-587 Top Layer, Copper................................................................................................................14
Figure 8-4. TPS548A20EVM-587 Layer Two, Copper...............................................................................................................14
Figure 8-5. TPS548A20EVM-587 Layer Three, Copper............................................................................................................15
Figure 8-6. TPS548A20EVM-587 Layer Four, Copper.............................................................................................................. 15
Figure 8-7. TPS548A20EVM-587 Layer Five, Copper.............................................................................................................. 16
Figure 8-8. TPS548A20EVM-587 Bottom Layer, Copper.......................................................................................................... 16
List of Tables
Table 3-1. TPS548A20EVM-737 Electrical Performance Specifications(1) .................................................................................4
Table 4-1. Device Pin-Out Difference Summary.......................................................................................................................... 5
Table 6-1. Switching Frequency Selection...................................................................................................................................9
Table 6-2. Mode Selection........................................................................................................................................................... 9
Table 6-3. Enable Selection....................................................................................................................................................... 10
Table 7-1. Test Point Functions..................................................................................................................................................12
Table 9-1. EVM Components List (Based on the Schematic, See Figure 4-1).......................................................................... 17
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SLUUBC0A – DECEMBER 2015 – REVISED AUGUST 2021
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TPS548A20 SWIFT™ Step-Down Converter Evaluation Module User's Guide 1
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