Datasheet

User's Guide
SLVU578–December 2011
TPS54428, 4-A, SWIFT™ Regulator Evaluation Module
This user's guide contains information for the TPS54428 as well as support documentation for the
TPS54428EVM-052 evaluation module. Included are the performance specifications, schematic, and the
bill of materials of the TPS54428EVM-052 evaluation module.
Contents
1 Introduction .................................................................................................................. 2
2 Performance Specification Summary ..................................................................................... 3
3 Modifications ................................................................................................................. 3
3.1 Output Voltage Setpoint ........................................................................................... 3
3.2 Output Filter and Closed-Loop Response ...................................................................... 4
4 Test Setup and Results .................................................................................................... 4
4.1 Input/Output Connections ......................................................................................... 4
4.2 Start-Up Procedure ................................................................................................ 4
4.3 Efficiency ............................................................................................................ 5
4.4 Load Regulation .................................................................................................... 6
4.5 Line Regulation ..................................................................................................... 6
4.6 Frequency ........................................................................................................... 7
4.7 Load Transient Response ........................................................................................ 7
4.8 Output Voltage Ripple ............................................................................................. 8
4.9 Input Voltage Ripple ............................................................................................... 9
4.10 Start-Up and Shut-Down ........................................................................................ 10
5 Board Layout ............................................................................................................... 11
5.1 Layout .............................................................................................................. 11
6 Schematic, Bill of Materials, and Reference ........................................................................... 14
6.1 Schematic ......................................................................................................... 14
6.2 Bill of Materials .................................................................................................... 14
6.3 Reference .......................................................................................................... 14
List of Figures
1 TPS54428EVM-052 Efficiency ............................................................................................ 5
2 TPS54428EVM-052 Light-Load Efficiency............................................................................... 5
3 TPS54428EVM-052 Load Regulation, V
IN
= 5 V and V
IN
= 12 V ..................................................... 6
4 TPS54428EVM-052 Line Regulation..................................................................................... 6
5 TPS54428EVM-52 Frequency ............................................................................................ 7
6 TPS54428EVM-052 Load Transient Response, 1 A to 3 A ........................................................... 7
7 TPS54428EVM-052 Load Transient Response, 0.01 A to 2 A ....................................................... 7
8 TPS54428EVM-052 Output Voltage Ripple ............................................................................. 8
9 TPS54428EVM-052 Eco-mode™ Output Voltage Ripple ............................................................. 8
10 TPS54428EVM-052 Eco-mode™ Output Voltage Ripple at No Load ............................................... 9
11 TPS54428EVM-052 Input Voltage Ripple ............................................................................... 9
12 TPS54428EVM-052 Start-Up Relative to V
IN
.......................................................................... 10
13 TPS54428EVM-052 Shut-down Relative to V
IN
........................................................................ 10
14 TPS54428EVM-052 Start-Up Relative to EN .......................................................................... 10
SWIFT, Eco-mode, D-CAP2 are trademarks of Texas Instruments.
1
SLVU578–December 2011 TPS54428, 4-A, SWIFT™ Regulator Evaluation Module
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