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User's Guide

SLVU266 – August 2008

TPS720xxEVM-307

This user’s guide describes the characteristics, operation, and use of the TPS720xxEVM-307 evaluation

module (EVM). This EVM demonstrates the Texas Instruments TPS720xx tiny low dropout (LDO) linear

regulator in a 5-pin WCSP package. The TPS720xx supplies up to 350 mA of output current at a fixed

output voltage from a 1.1 V to 4.5 V input source. This user’s guide includes setup instructions, test

results, schematic diagram, bill of materials (BOM), and PCB layout drawings for the EVM.

Contents

1 Introduction ................................................................................................................... 2

2 EVM Jumpers and Connectors ............................................................................................ 3

3 Operation ..................................................................................................................... 3

4 Test Results .................................................................................................................. 4

5 Board Layout, Schematic and Bill of Materials .......................................................................... 5

List of Figures

1 Startup From Enable of the TPS72015EVM-307 into 350 mA Load (V

= 2V, V

BIAS

= 2.9V) ..................... 4

2 Load Transient of the TPS72015EVM-307, V

= 2V, V

BIAS

= 2.9V, I

OUT

= 0mA to 300mA to 0mA .............. 4

3 Top Assembly Layer ......................................................................................................... 5

4 Top Layer ..................................................................................................................... 6

5 Bottom Layer ................................................................................................................. 6

6 TPS720xxEVM-307 Schematic ............................................................................................ 7

List of Tables

1 Typical Performance Specification Summary ............................................................................ 2

2 TPS720xxEVM-307 Jumpers and Connectors........................................................................... 3

3 Bill of Materials ............................................................................................................... 8

SLVU266 – August 2008 TPS720xxEVM-307 1

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Summary of content (10 pages)

PAGE 1
User's Guide SLVU266 – August 2008 TPS720xxEVM-307 This user’s guide describes the characteristics, operation, and use of the TPS720xxEVM-307 evaluation module (EVM). This EVM demonstrates the Texas Instruments TPS720xx tiny low dropout (LDO) linear regulator in a 5-pin WCSP package. The TPS720xx supplies up to 350 mA of output current at a fixed output voltage from a 1.1 V to 4.5 V input source.
PAGE 2
Introduction 1 www.ti.com Introduction The TPS720xxEVM-307 evaluation module (EVM) assists designers in evaluating the operation and performance of the TPS720xx low dropout (LDO) linear regulator. This LDO provides up to 350 mA of output current at a fixed output programmed at the factory. The board features the 1,33-mm × 0,96-mm 5-pin WCSP package for a tiny solution size. 1.
PAGE 3
EVM Jumpers and Connectors www.ti.com 2 EVM Jumpers and Connectors This section describes the jumpers and connectors on the EVM as well as how to properly connect, set up, and use the TPS720xxEVM-307. Table 2. TPS720xxEVM-307 Jumpers and Connectors 3 JUMPER DESCRIPTION DIRECTIONS J1 - pin 1 Input Bias Voltage Connection Connect the lead from the power terminal of the bias input source to this input. The supply must be between 2.5 V and 5.5 V. The supply must also be at least 1.
PAGE 4
Test Results 4 www.ti.com Test Results This section provides typical performance waveforms using the TPS720xxEVM-307 printed circuit board. Enable Output Voltage Figure 1. Startup From Enable of the TPS72015EVM-307 into 350 mA Load (VIN = 2V, VBIAS = 2.9V) Output Voltage Load Current Figure 2. Load Transient of the TPS72015EVM-307, VIN = 2V, VBIAS = 2.
PAGE 5
Board Layout, Schematic and Bill of Materials www.ti.com 5 Board Layout, Schematic and Bill of Materials This section provides the TPS720xxEVM-307 board layout, schematic and bill of materials. 5.1 Board Layout Board layout is important for all LDO power supplies. If the layout is not carefully done, the regulator could show stability problems. Therefore, use wide and short traces for the main current path and for the power ground tracks.
PAGE 6
Board Layout, Schematic and Bill of Materials www.ti.com Figure 4. Top Layer Figure 5.
PAGE 7
Board Layout, Schematic and Bill of Materials www.ti.com 5.2 Schematic and Bill of Materials Figure 6.
PAGE 8
Board Layout, Schematic and Bill of Materials www.ti.com Table 3. Bill of Materials COUNT -001 -002 8 RefDes Value Description SIZE Part Number MFR 0 0 C1 Open Capacitor, Ceramic, 10V, X5R, 20% 0805 Std Std 1 1 C2 1.0uF Capacitor, Ceramic, 10V, X5R, 20% 0603 Std Std 1 1 C3 0.1uF Capacitor, Ceramic, 6.3V, X5R, 20% 0603 Std Std 1 1 C4 2.2uF Capacitor, Ceramic, 6.3V, X5R, 10% 0603 Std Std 0 0 C5 Open Capacitor, Ceramic, 6.
PAGE 9
EVALUATION BOARD/KIT IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
PAGE 10
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.