User's Guide

SLVU659A – March 2012 – Revised March 2012

TPS62125EVM-044 Evaluation Module

This user’s guide describes the characteristics, operation, and use of the Texas Instruments TPS62125

evaluation module (EVM). This EVM is designed to help the user easily evaluate and test the operation

and functionality of the TPS62125. The EVM converts a 4-V to 17-V input voltage to a regulated 3.3-V

output voltage that delivers 300 mA. This user’s guide includes setup instructions for the hardware,

printed-circuit board layouts for the EVM, a schematic diagram, a bill of materials, and test results for the

EVM.

Contents

1

Introduction

.................................................................................................................. 2

2

Setup

......................................................................................................................... 2

3

TPS62125EVM-044 Test Results

......................................................................................... 3

4

Board Layout

................................................................................................................ 9

5

Schematic and Bill of Materials

.......................................................................................... 11

List of Figures

1

Efficiency (R1, R2, and R3 not installed. JP1 connected between ON and EN.)

.................................. 3

2

Load Regulation

............................................................................................................. 4

3

Line Regulation With Iout = 250 mA

...................................................................................... 4

4

Loop Response With Vin = 12 V and Iout = 250 mA

................................................................... 4

5

Input Voltage Ripple With Vin = 12 V and Iout = 250 mA

............................................................. 5

6

Output Voltage Ripple With Vin = 12 V and Iout = 250 mA

........................................................... 5

7

Load Transient Response With Vin = 12 V

.............................................................................. 6

8

Start-Up on Vin With 250-mA Load

....................................................................................... 6

9

Start-Up on EN With 250-mA Load

....................................................................................... 7

10

Shutdown on EN With 250-mA Load

..................................................................................... 7

11

Prebias Start-Up and Shutdown on EN With 250-mA Load

........................................................... 8

12

Thermal Performance With Vin = 12 V and Iout = 250 mA

........................................................... 8

13

Top Silk Layer

............................................................................................................... 9

14

Top Layer

.................................................................................................................... 9

15

Bottom Layer

............................................................................................................... 10

16

Top Assembly Layer

...................................................................................................... 10

17

TPS62125EVM-044 Schematic

.......................................................................................... 11

List of Tables

1

Performance Specification Summary

..................................................................................... 2

2

TPS62125EVM-044 Bill of Materials

.................................................................................... 12

1

SLVU659A – March 2012 – Revised March 2012

TPS62125EVM-044 Evaluation Module

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