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User's Guide

SLVU476–June 2011

TPS740xxDPTEVM-713 Evaluation Module

This user’s guide describes the characteristics, operation, and use of the TPS74001DPTEVM-713 and

TPS74012DPTEVM-713 evaluation modules (EVM). The TPS740xxDPTEVM-713 is a fully assembled

and tested platform for evaluating the performance of the TPS740xx low-dropout voltage regulator in a Jr

S-Pak™ package. The TPS740xx family is a set of wide bandwidth, very low-dropout, 1.5A voltage

regulators, ideal for powering microprocessors, with adjustable output voltages between 0.9V and 4.0V.

TPS74001DPTEVM-713 EVM has an output voltage of 1.5V, set by external resistors, while the

TPS74012DPTEVM-713 has an output voltage of 1.2V, set by internal resistors and cannot be changed.

This user’s guide includes setup configuration instructions, a complete schematic diagram, bill of materials

(BOM), and printed circuit board (PCB) 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 .................................................................................................. 4

4 Operation ..................................................................................................................... 4

4.1 Adjustable Output Voltage ........................................................................................ 4

4.2 Transient Response ............................................................................................... 5

4.3 Dropout Voltage, V

.............................................................................................. 5

4.4 Enable / Shutdown (Fixed Voltage Version Only – TPS74012DPT) ........................................ 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 TPS74001DPTEVM-713 Rev A Schematic ............................................................................. 3

2 Quick Start Connection Setup............................................................................................. 4

3 Transient Response of TPS74001DPTEVM-713 with V

= 3.5V, V

BIAS

= 5.0V, Load = 1.2A..................... 5

4 Dropout Voltage, V

, measurement of TPS74001DPTEVM-713 for V

BIAS

= 5.0V, V

OUT

= 1.5V .................. 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 TPS74001DPT EVM .................................. 5

3 Bill of Materials .............................................................................................................. 9

4 Assembly Number and Corresponding Label Text ..................................................................... 9

SLVU476– June 2011 TPS740xxDPTEVM-713 Evaluation Module

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Summary of content (11 pages)

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User's Guide SLVU476 – June 2011 TPS740xxDPTEVM-713 Evaluation Module This user’s guide describes the characteristics, operation, and use of the TPS74001DPTEVM-713 and TPS74012DPTEVM-713 evaluation modules (EVM). The TPS740xxDPTEVM-713 is a fully assembled and tested platform for evaluating the performance of the TPS740xx low-dropout voltage regulator in a Jr S-Pak™ package. The TPS740xx family is a set of wide bandwidth, very low-dropout, 1.
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Introduction 1 www.ti.com Introduction The TPS740xxDPTEVM-713 helps designers evaluate the operation and performance of the TPS740xx low voltage, low-dropout regulator in a 5-pin Jr S-Pak™ package. This particular EVM configuration contains a low voltage, low-dropout 1.5A voltage regulator (LDO) with dual input voltages with input voltage range of 1.2V to 5.5V and input VBIAS range of 3.0V to 5.5V.
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Schematic www.ti.com 2 Schematic Figure 1. TPS74001DPTEVM-713 Rev A Schematic 3 Setup and Board Description 3.1 EVM Input/Output Connectors and Test Jumpers Table 1. List of Input and Output Connectors Connector Label Description J1 BIAS VBIAS input power supply connection: 3.0V to 5.5V. Used to power error amplifier, reference, and internal control circuits. J2 GND Return connection for VBIAS input power supply. J3 VIN VIN input power supply connection: 1.2V to 5.5V.
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Operation 3.2 www.ti.com Connection Setup 1. 1 Connect power supply #1 to VIN (J3) and its return connection to J5 as shown in Figure 2. VIN should be at least 300mV (or VDO) greater than VOUT, up to 5.5V. 2. Connect power supply #2 to VBIAS (J1) and its return connection to J2 as shown in Figure 2. VBIAS must be between 3.0V and 5.5V. 3. An ammeter can be connected in series with either power supply to measure the supply current or bias current. 4.
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Operation www.ti.com Table 2. Sample Resistor Values for Common Output Voltages for TPS74001DPT EVM R1 [kΩ] R2 [kΩ] VOUT [V] 0.9 Short Open 0.562 5.11 1.0 0.75 4.53 1.05 1.07 4.99 1.1 1.58 4.75 1.2 1.91 2.87 1.5 2.43 2.43 1.8 3.01 1.69 2.5 4.22 1.58 3.3 5.23 1.74 3.6 TPS74012DPTEVM is a fixed output voltage IC and cannot be modified. The output voltage is fixed at 1.2V. 4.
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Operation www.ti.com 0.12 Dropout Voltage - V 0.1 0.08 0.06 0.04 0.02 0 0 200 400 600 800 1000 1200 IO - Output Current - mA 1400 1600 1800 Figure 4. Dropout Voltage, VDO, measurement of TPS74001DPTEVM-713 for VBIAS = 5.0V, VOUT = 1.5V 4.4 Enable / Shutdown (Fixed Voltage Version Only – TPS74012DPT) The EN pin is active high and enables the regulator. When VEN is above 1.1V, the regulator turns on. When VEN is below 0.4V, the regulator turns off.
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Board Layout www.ti.com 5 Board Layout This section provides the TPS740xxDPTEVM-713 board layout and illustrations. NOTE: Board layouts are not to scale. These figures are intended to show how the board is laid out; they are not intended to be used for manufacturing TPS740xxDPTEVM-713 PCBs. Figure 5. Silkscreen Layer Figure 6.
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Board Layout www.ti.com Figure 7. Top Layer Routing Figure 8.
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Bill of Materials www.ti.com 6 Bill of Materials Table 3. Bill of Materials HPA713-001 HPA713-002 Count Count RefDes Value Description Size Part Number MFR 2 2 C1, C4 10 µF Capacitor, Ceramic,10V, X5R 20% 0805 STD STD 0 0 C2 DNI Capacitor, Ceramic 0603 STD STD 1 1 C3 1 µF Capacitor, Ceramic, 6.3V, X5R, 10% 0805 STD STD 0 0 C5 DNI Capacitor, Ceramic 6032 STD STD 6 6 J1, J2, J3, J4, J5, J6 PEC02SAAN Header, Male 2-pin, 100mil spacing 0.
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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.
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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.