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User's Guide
TPS7A21EVM-059 Evaluation Module
This user's guide describes the operational use of the TPS7A21EVM-059 evaluation module (EVM) as a
reference design for engineering demonstration and evaluation of the TPS7A21 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
TPS7A21EVM-059.
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Trademarks..............................................................................................................................................................................2
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Introduction.............................................................................................................................................................................3
3
Setup........................................................................................................................................................................................3
Operation...................................................................................................................................................5
3.4 Optional Load Transient Circuit Operation.........................................................................................................................
Layout...........................................................................................................................................................................8
5 TPS7A21 EVM Schematic....................................................................................................................................................
Materials......................................................................................................................................................................11
SBVU072 - OCTOBER 2021
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ABSTRACT
Figure 1-1. TPS7A21EVM-059 Evaluation Module
Table of Contents
Descriptions.........................................................................................................................3
Descriptions..........................................................................................3
Copyright © 2021 Texas Instruments Incorporated
Table of Contents
TPS7A21EVM-059 Evaluation Module
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Summary of Contents for Texas Instruments TPS7A21EVM-059
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Page 1: Table Of Contents
ABSTRACT Figure 1-1. TPS7A21EVM-059 Evaluation Module This user's guide describes the operational use of the TPS7A21EVM-059 evaluation module (EVM) as a reference design for engineering demonstration and evaluation of the TPS7A21 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 List of Figures Figure 1-1. TPS7A21EVM-059 Evaluation Module........................Figure 3-1. TPS7A21EVM-059 Turn On............................Figure 3-2. TPS7A21EVM-059 With Current Probes Attached....................Figure 3-3. TPS7A21EVM-059 Load Transient Results......................Figure 4-1. Top Assembly Layer and Silk Screen........................8 Figure 4-2. Top Layer Routing..............................
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Page 3: Introduction
Introduction 2 Introduction The Texas Instruments TPS7A21EVM-059 evaluation module (EVM) helps designers evaluate the operation and performance of the TPS7A21 LDO voltage regulator. As shown in Table 2-1, the TPS7A21EVM-059 contains one TPS7A21 LDO voltage regulator in the DSBGA package. An optional load transient circuit is also included to assist the user with high-speed load transient testing. - Page 4 TP2 and TP3 allow the user to measure the gate drive resistance R8 when power is turned off to the EVM. 3.2.9 TP4 TP4 is the enable pin to enable the gate driver device. Tie this pin to GND to enable the gate driver. TPS7A21EVM-059 Evaluation Module SBVU072 – OCTOBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated...
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Page 5: Tps7A21 Ldo Operation
TPS7A21 LDO after VIN is applied. Figure 3-1 shows the result of the TPS7A21EVM-059 during turn on. The blue trace is the enable voltage, and the red trace is the output voltage. Figure 3-1. TPS7A21EVM-059 Turn On SBVU072 – OCTOBER 2021... -
Page 6: Optional Load Transient Circuit Operation
Optional kelvin sense points are provided using the SMA connectors J1 (VIN) and J2 (VOUT). 3.4 Optional Load Transient Circuit Operation The TPS7A21EVM-059 evaluation module contains an optional high-performance load transient circuit to allow efficient testing of the TPS7A21 LDO load transient performance. To use the optional load transient circuit, install the correct components in accordance with the application. -
Page 7: Figure 3-3. Tps7A21Evm-059 Load Transient Results
The resulting test data shows a 1-mA to 500-mA load step on VOUT of the LDO, with only a 1-μF capacitor on the output of the LDO. Figure 3-3. TPS7A21EVM-059 Load Transient Results SBVU072 – OCTOBER 2021... -
Page 8: Board Layout
Figure 4-6 show the board layout for the TPS7A21EVM-059 PCB. The TPS7A21EVM-059 dissipates power, which may cause some components to experience an increase in temperature. The TPS7A21 LDO, LMG1020YFFR gate driver, and pulsed resistors R2, R3, R4, R5, and R6 are most at risk of raising to a high junction temperature during normal operation. -
Page 9: Figure 4-5. Bottom Layer Routing
Board Layout Figure 4-5. Bottom Layer Routing Figure 4-6. Bottom Assembly Layer and Silk Screen SBVU072 – OCTOBER 2021 TPS7A21EVM-059 Evaluation Module Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 10: Tps7A21 Evm Schematic
TPS7A21 EVM Schematic www.ti.com 5 TPS7A21 EVM Schematic Figure 5-1 shows a schematic for the TPS7A21EVM-059. Re vis ion His tory ECN # Approved Da te Approved by Notes VOUT Vout Ma x = 6.5V Vin Ma x = 6.5V... -
Page 11: Bill Of Materials
TPS7A21 EVM Schematic 6 Bill of Materials Table 6-1 shows the bill of materials for the TPS7A21EVM-059. Table 6-1. Bill of Materials Designator Quantity Value Description PackageReference PartNumber Manufacturer Alternate Alternate PartNumber Manufacturer !PCB1 Printed Circuit Board LP059 1µF ±10% 10V Ceramic Capacitor X7R... - Page 12 RES, 0, 5%, 0.125 W, AEC-Q200 Grade ERJ-6GEY0R00V Panasonic 0, 0805 RES, 0, 1%, 0.1 W, AEC-Q200 Grade 0, Stackpole R10, R11 RMCF0603ZT0R00 0603 Electronics Inc TPS7A21EVM-059 Evaluation Module SBVU072 – OCTOBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated...
- Page 13 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 14 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 15 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 16 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 17 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 18 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 © 2021, Texas Instruments Incorporated...
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