Datasheet

User's Guide
SLVU388–August 2010
TPS62122EVM
This user’s guide describes the characteristics, operation, and use of the TPS62122 evaluation module
(EVM). The TPS62122EVM-586 is a fully assembled and tested circuit for evaluating the performance of
the TPS62122 high-input voltage step-down converter. This document includes schematic diagrams, a
printed circuit board (PCB) layout, bill of materials, and test data. Throughout this document, the
abbreviation EVM and the term evaluation module are synonymous with the TPS62122EVM-586 unless
otherwise noted.
Contents
1 Introduction .................................................................................................................. 2
1.1 Features ............................................................................................................. 2
1.2 Applications ......................................................................................................... 2
2 TPS62122EVM Schematic ................................................................................................ 2
3 Connector and Test Point Descriptions .................................................................................. 3
3.1 Enable Jumpers/Switches (RefDes) TPS62122 ............................................................... 3
4 Test Configuration .......................................................................................................... 4
4.1 Hardware Setup .................................................................................................... 4
4.2 Procedure ........................................................................................................... 5
5 TPS62122EVM Test Data ................................................................................................. 5
5.1 Efficiency ............................................................................................................ 5
5.2 Start-Up ............................................................................................................. 6
5.3 Load Transient Response ........................................................................................ 7
5.4 Typical Operation, 60 mA ......................................................................................... 7
5.5 Typical Operation, 10 mA ......................................................................................... 8
5.6 Current Limit Operation ........................................................................................... 8
6 TPS62122EVM Assembly Drawings and Layout ....................................................................... 9
7 Bill of Materials ............................................................................................................. 12
List of Figures
1 TPS62122EVM Schematic ................................................................................................ 2
2 Hardware Board Connection .............................................................................................. 4
3 EFFICIENCY vs INPUT VOLTAGE V
IN
(V
OUT
= 3.0V) .................................................................. 5
4 TPS62122EVM Efficiency versus Load Current ........................................................................ 5
5 TPS62122EVM Startup into 300-Ω Load(V
IN
= 8.0 V, V
OUT
= 3.0 V) ................................................. 6
6 TPS62122EVM Start-Up from a High-Impedance Source(V
IN
= 12.0 V, V
OUT
= 3.0 V) ............................ 6
7 TPS62122 Load Transient Response(V
IN
= 8.0 V, V
OUT
= 1.8 V) ..................................................... 7
8 TPS62122EVM Output Ripple, 60-mA Load(V
IN
= 8.0 V, V
OUT
= 3.0 V) ............................................. 7
9 TPS62122EVM Output Ripple, 10-mA Load(V
IN
= 8.0 V, V
OUT
= 3.0 V) ............................................. 8
10 Current Limit Operation .................................................................................................... 8
11 TPS62122EVM Component Placement (Top View).................................................................... 9
12 TPS62122EVM Top-Side Copper (Top View) ......................................................................... 10
13 TPS62122EVM Bottom-Side Copper (Bottom View) ................................................................. 11
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SLVU388–August 2010 TPS62122EVM
Copyright © 2010, Texas Instruments Incorporated