Datasheet

User's Guide
SLVU475A–June 2011– Revised June 2011
TPS740xxDGKEVM-722 Evaluation Module
This user’s guide describes the characteristics, operation, and use of the TPS74001DGKEVM-722 and
TPS74012DGKEVM-722 evaluation modules (EVM). The TPS740xxDGKEVM-722 is a fully assembled
and tested platform for evaluating the performance of the TPS740xx low-dropout voltage regulator in a
power MSOP-8 package. The TPS740xx family is a set of wide bandwidth, very low-dropout, 1.5-A
voltage regulators, ideal for powering microprocessors, with adjustable output voltages between 0.9 V and
4 V. TPS74001DGKEVM-722 EVM has an output voltage of 1.5 V, set by external resistors, whereas the
TPS74012DGKEVM-722 has an output voltage of 1.2 V, set by internal resistors and cannot be changed.
This user’s guide includes setup configuration instructions, a complete schematic diagram, bill of materials
, and printed-circuit board layout drawings for the evaluation module.
Contents
1 Introduction .................................................................................................................. 2
1.1 Features ............................................................................................................. 2
1.2 Orderable Options ................................................................................................. 2
2 Schematic .................................................................................................................... 3
3 Setup and Board Description .............................................................................................. 3
3.1 EVM Input/Output Connectors and Test Jumpers ............................................................. 3
3.2 Connection Setup .................................................................................................. 3
4 Operation ..................................................................................................................... 4
4.1 Adjustable Output Voltage ........................................................................................ 4
4.2 Transient Response ............................................................................................... 5
4.3 Dropout Voltage, V
DO
.............................................................................................. 6
4.4 Enable/Shutdown, Fixed Voltage Version Only – TPS74012DGK .......................................... 6
4.5 Internal Current Limit .............................................................................................. 6
4.6 Thermal Protection ................................................................................................. 6
5 Board Layout ................................................................................................................ 7
6 Bill of Materials .............................................................................................................. 9
List of Figures
1 TPS74001DGK-722 Rev-A Schematic................................................................................... 3
2 Quick-Start Connection Setup............................................................................................. 4
3 Transient Response of TPS74001DGKEVM With V
IN
= 3.5 V, V
BIAS
= 5 V, Load = 1.2 A......................... 5
4 Dropout Voltage, V
DO
, Measurement of TPS74001DGKEVM for V
BIAS
= 5 V, V
OUT
= 1.5 V........................ 6
5 Silkscreen Layer ............................................................................................................ 7
6 Assembly Layer ............................................................................................................. 7
7 Top Layer Routing .......................................................................................................... 8
8 Bottom Layer Routing ...................................................................................................... 8
List of Tables
1 List of Input and Output Connectors...................................................................................... 3
2 Sample Resistor Values for Common Output Voltages for TPS74001DGK ........................................ 4
3 Bill of Materials .............................................................................................................. 9
4 Assembly Number and Corresponding Label Text ..................................................................... 9
1
SLVU475A–June 2011–Revised June 2011 TPS740xxDGKEVM-722 Evaluation Module
Submit Documentation Feedback
Copyright © 2011, Texas Instruments Incorporated