Texas Instruments TPS7A74EVM-068 User Manual
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Texas Instruments TPS7A74EVM-068 User Manual

Evaluation module
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User's Guide
TPS7A74EVM-068 Evaluation Module
This user's guide describes the operational use of the TPS7A74EVM-068 evaluation module (EVM) as a
reference design for engineering demonstration and evaluation of the TPS7A74 low-dropout linear regulator
(LDO). Included in this user's guide are setup and operating instructions, thermal and layout guidelines, a
printed-circuit board (PCB) layout, a schematic diagram, and a bill of materials (BOM).
Throughout this document, the terms evaluation board, evaluation module, and EVM are synonymous with the
TPS7A74EVM-068.
SBVU076 – APRIL 2022
Submit Document Feedback
ABSTRACT
Figure 1-1. TPS7A74EVM-068 Evaluation Module
Copyright © 2022 Texas Instruments Incorporated
TPS7A74EVM-068 Evaluation Module
1

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Summary of Contents for Texas Instruments TPS7A74EVM-068

  • Page 1 ABSTRACT Figure 1-1. TPS7A74EVM-068 Evaluation Module This user's guide describes the operational use of the TPS7A74EVM-068 evaluation module (EVM) as a reference design for engineering demonstration and evaluation of the TPS7A74 low-dropout linear regulator (LDO). Included in this user's guide are setup and operating instructions, thermal and layout guidelines, a printed-circuit board (PCB) layout, a schematic diagram, and a bill of materials (BOM).

  • Page 2: Table Of Contents

    Figure 1-1. TPS7A74EVM-068 Evaluation Module........................Figure 2-1. TPS7A74EVM-068 Turn-On............................5 Figure 2-2. TPS7A74EVM-068 With Current Probes Attached....................Figure 2-3. TPS7A74EVM-068 Load Transient Results: 50-μA to 1.42-A Load Step..............7 Figure 2-4. TPS7A74EVM-068 Load Transient Results: 1.42-A to 50-μA Load Step..............7 Figure 3-1. Top Assembly Layer and Silk Screen........................8...

  • Page 3: Introduction

    Introduction 1 Introduction The Texas Instruments TPS7A74EVM-068 evaluation module (EVM) helps designers evaluate the operation and performance of the TPS7A74 LDO voltage regulator. As shown in Table 1-1, the TPS7A74EVM-068 contains one TPS7A74 LDO voltage regulator in the DSD package. An optional load transient circuit is also included to assist the user with high-speed load transient testing.

  • Page 4: Optional Load Transient Input/Output Connector Descriptions

    EVM. Setpoint resistors are prepopulated on the TPS7A74EVM-068 to provide an output voltage of 1 V, 1.2 V, 1.5 V, 1.8 V, or 3.3 V. Select one of these output voltages by using the provided shunt to short the necessary pin on header J16.

  • Page 5: Figure 2-1. Tps7A74Evm-068 Turn-On

    The slots were sized to fit most current probes, such as the LeCroy ™ AP015 or CP031 current probes. Figure 2-2. TPS7A74EVM-068 With Current Probes Attached SBVU076 – APRIL 2022 TPS7A74EVM-068 Evaluation Module Submit Document Feedback...

  • Page 6: Optional Load Transient Circuit Operation

    Optional kelvin sense points are provided using the SMA connectors J1 (VIN) and J2 (VOUT). 2.4 Optional Load Transient Circuit Operation The TPS7A74EVM-068 evaluation module contains an optional high-performance load transient circuit to allow efficient testing of the TPS7A74 LDO load transient performance. To use the optional load transient circuit, install the correct components in accordance with the application.

  • Page 7: Figure 2-3. Tps7A74Evm-068 Load Transient Results: 50-Μa To 1.42-A Load Step

    R12, R13, R14, R15, and R16 provide 1.42 A of pulsed load. The resulting test data shows a 50-μA to 1.42-A load step on VOUT of the LDO, with only a 47-μF capacitor on the output of the LDO. Figure 2-3. TPS7A74EVM-068 Load Transient Figure 2-4. TPS7A74EVM-068 Load Transient Results: 50-μA to 1.42-A Load Step...

  • Page 8: Board Layout

    TPS7A74EVM-068 PCB. The TPS7A74EVM-068 dissipates power, which may cause some components to experience an increase in temperature. The TPS7A74 LDO and pulsed resistors R12, R13, R14, R15, and R16 are most at risk of raising the junction temperature during normal operation.

  • Page 9: Figure 3-5. Layer 4

    Board Layout Figure 3-5. Layer 4 Figure 3-6. Layer 5 Figure 3-7. Bottom Layer Routing Figure 3-8. Bottom Assembly Layer and Silk Screen SBVU076 – APRIL 2022 TPS7A74EVM-068 Evaluation Module Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...

  • Page 10: Tps7A74Evm Schematic

    TPS7A74EVM Schematic www.ti.com 4 TPS7A74EVM Schematic Figure 4-1 shows a schematic for the TPS7A74EVM-068. Vin Re comme nde d Ma x = 5.5V 7.15k BIAS Re comme nde d Ma x = 5.5V Vout Ma x = 3.6V BIAS BIAS Iout Ma x = 1.5A...

  • Page 11: Bill Of Materials

    TPS7A74EVM Schematic 5 Bill of Materials Table 5-1 shows the bill of materials for the TPS7A74EVM-068. Table 5-1. Bill of Materials Designator Quantity Value Description PackageReference PartNumber Manufacturer Alternate Alternate PartNumber Manufacturer !PCB1 Printed Circuit Board LP068 4.7uF CAP, CERM, 4.7 uF, 10 V, +/- 10%, X5R,...
  • Page 12 Connector, SMA Jack, Vertical, Gold, 142-0711-201 Cinch Connectivity J6, J21 Jumper, SMT shorting jumper, JMP-36-30X40SMT Any J7, J8 Header, 100mil, 2x2, Gold, TH 2x2 Header TSW-102-07-G-D Samtec TPS7A74EVM-068 Evaluation Module SBVU076 – APRIL 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...
  • Page 13 RES, 0, 5%, 0.125 W, AEC-Q200 Grade ERJ-6GEY0R00V Panasonic 0, 0805 R21, R22 RES, 0, 1%, 0.1 W, AEC-Q200 Grade 0, RMCF0603ZT0R00 Stackpole 0603 Electronics Inc SBVU076 – APRIL 2022 TPS7A74EVM-068 Evaluation Module Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...
  • Page 14 STANDARD TERMS FOR EVALUATION MODULES Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, and/or documentation which may be provided together or separately (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms set forth herein.
  • Page 15 www.ti.com Regulatory Notices: 3.1 United States 3.1.1 Notice applicable to EVMs not FCC-Approved: FCC NOTICE: This kit is designed to allow product developers to evaluate electronic components, circuitry, or software associated with the kit to determine whether to incorporate such items in a finished product and software developers to write software applications for use with the end product.
  • Page 16 www.ti.com Concernant les EVMs avec antennes détachables Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à...
  • Page 17 www.ti.com EVM Use Restrictions and Warnings: 4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS. 4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling or using the EVM, including without limitation any warning or restriction notices.
  • Page 18 Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief in any United States or foreign court. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2019, Texas Instruments Incorporated...
  • Page 19 TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products. TI objects to and rejects any additional or different terms you may have proposed. IMPORTANT NOTICE Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2022, Texas Instruments Incorporated...

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