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Texas Instruments LM27341, User Manual

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Texas Instruments LM27341 User Manual Download Page 7

6 PCB Layout

Figure 6-1. Top Layer and Overlay

Figure 6-2. Internal Layer 1

www.ti.com

PCB Layout

SNVA381B – NOVEMBER 2008 – REVISED DECEMBER 2021

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LM27341 Step-Down Converter Evaluation Module User's Guide

7

Copyright © 2021 Texas Instruments Incorporated

Summary of Contents for LM27341

Page 1: ...evision History 8 List of Figures Figure 4 1 Conversion Efficiency Versus Output Current 5 Figure 4 2 Output Voltage During a Typical Start Up Sequence 5 Figure 6 1 Top Layer and Overlay 7 Figure 6 2 Internal Layer 1 7 Figure 6 3 Internal Layer 2 8 Figure 6 4 Bottom Layer 8 List of Tables Table 5 1 Bill of Materials 6 Trademarks All trademarks are the property of their respective owners www ti com...

Page 2: ...the bottom layer The LM27342 is thermally tied to the ground planes by thermal vias directly underneath the device The second internal layer is tied half to VIN and half to VOUT This application report contains the evaluation board schematic a quick setup procedure and a bill of materials BOM For complete circuit design information see the LM27341 LM27342 LM27341Q LM27342Q 2 MHz 1 5A 2A Wide Input...

Page 3: ...hematic www ti com Evaluation Board Schematic SNVA381B NOVEMBER 2008 REVISED DECEMBER 2021 Submit Document Feedback LM27341 Step Down Converter Evaluation Module User s Guide 3 Copyright 2021 Texas Instruments Incorporated ...

Page 4: ... MHz VOUT should remain in regulation with a nominal 3 3 V output Monitor SYNC and SW to observe the synchronization behavior 3 2 Starting Up The EN pin is tied to VIN to simplify start up The pullup resistor allows the power supply design engineer to toggle EN independently if desired and observe the start up behavior of the LM27342 3 3 Overcurrent Protection The evaluation board is configured wi...

Page 5: ...g power to the LM27342 evaluation board a soft start sequence occurs Figure 4 2 shows the output voltage during a typical start up sequence Output Current 1A Figure 4 2 Output Voltage During a Typical Start Up Sequence www ti com Performance Characteristics SNVA381B NOVEMBER 2008 REVISED DECEMBER 2021 Submit Document Feedback LM27341 Step Down Converter Evaluation Module User s Guide 5 Copyright 2...

Page 6: ...ata Catch Diode D1 Schottky Diode Vf 0 32 V CMS06 Toshiba Inductor L1 2 7 µH CDRH5D18BHHPNP 2R7M Sumida Feedback Resistor R1 430 Ω MCR03EZPFX4300 Rohm Feedback Resistor R2 187 Ω MCR03EZPFX1870 Rohm Pullup Resistor REN 4 7 kΩ MCR03EZPFX4701 Rohm Pulldown Resistor R_S 4 7 kΩ MCR03EZPFX4701 Rohm Connectors VIN GND GND VOUT EN SYNC Turret 160 2043 02 01 00 Cambion Test Point SW Miniature Test Point 50...

Page 7: ...nd Overlay Figure 6 2 Internal Layer 1 www ti com PCB Layout SNVA381B NOVEMBER 2008 REVISED DECEMBER 2021 Submit Document Feedback LM27341 Step Down Converter Evaluation Module User s Guide 7 Copyright 2021 Texas Instruments Incorporated ...

Page 8: ... to Revision B December 2021 Page Updated the numbering format for tables figures and cross references throughout the document 2 Updated the user s guide title 2 Edited user s guide for clarity 2 Revision History www ti com 8 LM27341 Step Down Converter Evaluation Module User s Guide SNVA381B NOVEMBER 2008 REVISED DECEMBER 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated...

Page 9: ...other than TI b the nonconformity resulted from User s design specifications or instructions for such EVMs or improper system design or c User has not paid on time Testing and other quality control techniques are used to the extent TI deems necessary TI does not test all parameters of each EVM User s claims against TI under this Section 2 are void if User fails to notify TI of any apparent defects...

Page 10: ... These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation...

Page 11: ...y for convenience and should be verified by User 1 Use EVMs in a shielded room or any other test facility as defined in the notification 173 issued by Ministry of Internal Affairs and Communications on March 28 2006 based on Sub section 1 1 of Article 6 of the Ministry s Rule for Enforcement of Radio Law of Japan 2 Use EVMs only after User obtains the license of Test Radio Station as provided in R...

Page 12: ... any interfaces electronic and or mechanical between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electrical shock hazard User assumes all responsibility and liability for any improper or unsafe handling or use of the EVM by User or its employees affiliates contractors or designees 4 4 User assumes all...

Page 13: ...OR DAMAGES ARE CLAIMED THE EXISTENCE OF MORE THAN ONE CLAIM SHALL NOT ENLARGE OR EXTEND THIS LIMIT 9 Return Policy Except as otherwise provided TI does not offer any refunds returns or exchanges Furthermore no return of EVM s will be accepted if the package has been opened and no return of the EVM s will be accepted if they are damaged or otherwise not in a resalable condition If User feels it has...

Page 14: ...o change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reproduction and display of these resources is prohibited No license is granted to any other TI intellectual property right or to any third party intellectual property right TI disclaims responsibility for and you will fully indemn...

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