herunterladen
User's Guide
SLAU430–February 2012
TPS7A7x00EVM-718 Evaluation Module
This user’s guide describes the functional operation of theTPS7A7200EVM-718 evaluation module (EVM)
for use as a reference design and as general engineering demonstration for the TPS7A7100, TPS7A7200,
and TPS7A7300 low-dropout (LDO) linear regulators. EVMs containing these other regulator integrated
circuits of the same family, and using the same printed-circuit board and circuitry are available and
orderable. 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 ............................................................................................... 3
2.3 Initial Setup and Equipment Interconnect ....................................................................... 3
3 Operation ..................................................................................................................... 3
4 Test Results ................................................................................................................. 3
4.1 Turnon Characteristic .............................................................................................. 3
4.2 Output Load Transient ............................................................................................. 4
5 Thermal Guidelines and Layout Recommendations ................................................................... 5
6 Board Layouts ............................................................................................................... 6
7 Schematic and Bill of Materials ........................................................................................... 7
7.1 Schematic ........................................................................................................... 7
7.2 Bill of Materials ..................................................................................................... 8
List of Figures
1 Turnon Sequence........................................................................................................... 4
2 Step-Load and Output Voltage Transient Response................................................................... 4
3 Assembly Layer ............................................................................................................. 6
4 Top Layer Routing .......................................................................................................... 6
5 Bottom Layer Routing ...................................................................................................... 7
6 TPS7A7x00EVM-718 Schematic ......................................................................................... 7
1 Introduction
Each of Texas Instruments EVMs, the TPS7A7100EVM-718, the TPS7A7200EVM-718, and the
TPS7A7300EVM-718, is designed with identical circuitry, excluding the LDO regulator itself, to help
engineers evaluate the operation and performance of the TPS7A7x00 linear regulator for possible use in
their own circuit application. Notable features of these LDO regulators include thermal and current- limit
shutdown protection, a Power Good function, pin-selectable output voltage, low dropout, and wideband
performance. The EVM contains a single linear regulator in a 5-mm x 5-mm, QFN (RGW), thermally
enhanced, PowerPad™ package. This regulator, including external components, is capable of delivering
up to 3 A (depending on the LDO regulator) to a dynamic load across the full recommended input and
output voltage range of the LDO regulator. A multipin header with jumpers is provided to enable easy
manual selection of the output voltage.
1
SLAU430–February 2012 TPS7A7x00EVM-718 Evaluation Module
Submit Documentation Feedback
Copyright © 2012, Texas Instruments Incorporated
Verzeichnis
