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User's Guide
SLVU741A–May 2012–Revised August 2013
TPS7A47xxEVM-094 Evaluation Module
This user’s guide describes the functional operation of the TPS7A47xxEVM-094 Evaluation Module (EVM)
for use as a design reference and as a general engineering demonstration for the TPS7A47xx low dropout
linear (LDO) regulator. Included in this User’s Guide are setup instructions, a schematic diagram, layout
and thermal guidelines, a bill of materials, and test results.
Contents
1 Introduction .................................................................................................................. 1
2 Setup ......................................................................................................................... 2
2.1 Input/Output Connector-Headers and Jumper Descriptions .................................................. 2
2.2 Soldering Guidelines ............................................................................................... 2
2.3 Initial Setup and Equipment Interconnect ....................................................................... 3
3 Operation ..................................................................................................................... 3
4 Test Results ................................................................................................................. 3
4.1 Turn On Characteristic ............................................................................................ 3
4.2 Output Load Transient ............................................................................................. 4
5 Thermal Guidelines and Layout Recommendations ................................................................... 4
6 Board Layout ................................................................................................................ 5
7 Schematic and Bill of Materials ........................................................................................... 7
7.1 Schematic ........................................................................................................... 7
7.2 Bill of Materials ..................................................................................................... 8
List of Figures
1 Turn On Sequence ......................................................................................................... 3
2 Step Load and Output Voltage Transient Response .................................................................. 4
3 Assembly Layer ............................................................................................................. 5
4 Top Layer Routing .......................................................................................................... 6
5 Bottom Layer Routing ...................................................................................................... 6
6 TPS7A47xxEVM-094 Schematic.......................................................................................... 7
List of Tables
1 J10 Jumper Voltages....................................................................................................... 2
2 Thermal Resistance, θ
JA
, and Maximum Power Dissipation........................................................... 4
3 TPS7A47xxEVM-094 Bill of Materials.................................................................................... 8
1 Introduction
This EVM is designed to help engineers evaluate the operation and performance of the TPS7A47xx linear
regulator for possible use in their own circuit application. Notable features of this LDO regulator include
thermal and current limit shutdown protection, pin selectable output voltage, low dropout, and low noise
(~3.5 µV / √Hz). The EVM contains a single linear regulator in a 5 mm × 5 mm, QFN (RGW), thermally
enhanced (PowerPad™) package. This regulator, including external components, is capable of delivering
up to 1.0 A to a dynamic load across the full recommended input and output voltage range of the LDO. A
multi-pin header with jumpers is provided to enable easy manual selection of the output voltage.
PowerPad is a trademark of Texas Instruments.
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SLVU741A–May 2012–Revised August 2013 TPS7A47xxEVM-094 Evaluation Module
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