1
Introduction
1.1
Background
User's Guide
SLVU163 – April 2006
TPS5420EVM-175 SWIFT™ Regulator Evaluation Module
Contents
1
Introduction
..........................................................................................
1
2
Test Setup and Results
............................................................................
3
3
Board Layout
........................................................................................
8
4
Schematic and Bill of Materials
.................................................................
11
List of Figures
1
Measured Efficiency, TPS5420
...................................................................
4
2
Load Regulation
....................................................................................
4
3
Line Regulation
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5
4
Load Transient Response, TPS5420
............................................................
5
5
Measured Loop Response, TPS5420, VIN = 25 V
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6
6
Measured Output Voltage Ripple, TPS5420
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6
7
Input Voltage Ripple, TPS5420
...................................................................
7
8
Power Up, VOUT Relative to VIN
...............................................................
7
9
Start-Up Waveform, VOUT Relative to ENA
...................................................
8
10
Top-Side Layout
....................................................................................
9
11
Bottom-Side Layout (Looking From Top Side)
................................................
10
12
Top-Side Assembly
...............................................................................
11
13
TPS5420EVM-175 Schematic
...................................................................
12
List of Tables
1
Input Voltage and Output Current Summary
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2
2
TPS5420EVM-175 Performance Specification Summary
.....................................
2
3
Output Voltages Available
.........................................................................
3
4
EVM Connectors and Test Points
................................................................
3
5
TPS5420EVM-175 Bill of Materials
.............................................................
13
This user's guide contains background information for the TPS5420 as well as support documentation for
the TPS5420EVM-175 evaluation module (HPA175). Also included are the performance specifications, the
schematic, and the bill of materials for the TPS5420EVM-175.
The TPS5420 dc/dc converter is designed to provide up to a 2-A continuous, 3-A peak output from an
input voltage source of 5.5 V to 36 V. Rated input voltage and output current range for the evaluation
module is given in
Table 1
. This evaluation module is designed to demonstrate the small
printed-circuit-board areas that may be achieved when designing with the TPS5420 regulator and does
not reflect the high input voltages that may be used when designing with this part. The switching
frequency is internally set at a nominal 500 kHz. The high-side MOSFET is incorporated inside the
SWIFT, PowerPAD are trademarks of Texas Instruments.
SLVU163 – April 2006
TPS5420EVM-175 SWIFT™ Regulator Evaluation Module
1
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