Datasheet

1 Introduction
User's Guide
SLVU233 – March 2008
Four-Channel, Power-Distribution Switch EVM
This user’s guide describes the TPS20xxEVM-295 family of evaluation modules (EVM). This guide
contains the EVM schematic, bill of materials, assembly drawings, and top and bottom board layouts.
Contents
1 Introduction ................................................................................................................... 1
2 EVM Options, Schematic, and Bill of Materials .......................................................................... 2
2.1 EVM Options ........................................................................................................ 2
2.2 Schematics .......................................................................................................... 3
2.3 Bill of Materials ...................................................................................................... 4
3 Board Layout ................................................................................................................. 5
3.1 TPS20xxEVM-295 Component Placement ...................................................................... 5
3.2 TPS20xxEVM-295 Top-Side Layout ............................................................................. 6
3.3 TPS20xxEVM-295 Bottom-Side Layout.......................................................................... 7
4 EVM Setup .................................................................................................................... 7
4.1 Recommended Test Equipment .................................................................................. 7
4.2 Measuring Current-Limit ........................................................................................... 8
4.3 Related Documentation from Texas Instruments ............................................................... 9
List of Figures
1 TPS20xxEVM-295 EVM Schematic ....................................................................................... 3
2 EVM Setup for Measuring Current Limit .................................................................................. 8
3 TPS2044BEVM-295 Short-Circuit Output Current and OCx Status .................................................. 8
List of Tables
1 TPS20xxEVM-295 Options ................................................................................................. 2
2 TPS20xxEVM-295 Bill of Materials ........................................................................................ 4
The TPS20xxEVM-295 family of evaluation modules (EVM) support the four-channel, current-limited,
power-distribution switches in Table 1 . These EVMs operate over a 2.7-V to 5.5-V range and provide a
continuous output current of up to 0.5 A. Test points provide convenient access to all critical node
voltages.
The silkscreen outline on the PCB top-side encloses components found in a typical USB application.
The TPS20xxEVM-295 accepts an S0-16 packaged power-distribution switch. These switches have an
enable input, an overcurrent status output, overtemperature shutdown, and identical pinouts.
Table 1 summarizes the available EVM options.
SLVU233 – March 2008 Four-Channel, Power-Distribution Switch EVM 1
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