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Texas Instruments LM73605 User Manual
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Texas Instruments LM73605 User Manual

Texas Instruments LM73605 User Manual

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The LM73605 / LM73606 evaluation module (EVM) is designed to help customers evaluate the
performance of the LM73605 / LM73606 synchronous step-down voltage converters. The EVM contains
one LM73605 or LM73606 device in the 30-pin wettable flanks QFN (WQFN) package, as shown in
Table
1. It is capable of delivering 5-V output voltage and up to 5-A (LM73605) or 6-A (LM73606) load
current with exceptional efficiency and output accuracy in a very small solution size. The EVM provides
multiple power connectors and test points, as well as mode setting options and enable input options, for
customer convenience. It also provides a good layout example, which is optimized for EMI performance
and thermal performance.
CONVERTER
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Trademarks
All trademarks are the property of their respective owners.
SNVU579 - September 2017
Submit Documentation Feedback
LM73605 / LM73606 EVM User's Guide
Table 1. Device and Package Configurations
IC
LM73605
LM73606
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Copyright © 2017, Texas Instruments Incorporated
PACKAGE
30-pin wettable flanks QFN (WQFN)
6 mm × 4 mm × 0.8 mm
Contents
LM73605 / LM73606 EVM User's Guide
User's Guide
SNVU579 - September 2017
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Summary of Contents for Texas Instruments LM73605

  • Page 1: Table Of Contents

    LM73605 or LM73606 device in the 30-pin wettable flanks QFN (WQFN) package, as shown in Table 1. It is capable of delivering 5-V output voltage and up to 5-A (LM73605) or 6-A (LM73606) load current with exceptional efficiency and output accuracy in a very small solution size. The EVM provides multiple power connectors and test points, as well as mode setting options and enable input options, for customer convenience.

  • Page 2: Introduction

    The LM73605/LM73606 family of devices are easy-to-use synchronous step-down DC-DC converters capable of driving up to 5 A (LM73605) or 6 A (LM73606) of load current from a supply voltage ranging from 3.5 V to 36 V. The LM73605/LM73606 provide exceptional efficiency and output accuracy in a very small solution size.

  • Page 3: Quick Start

    4. Turn on the power supply. With the default configuration, the EVM should power up and provide V 5 V. 5. Monitor the output voltage. The maximum load current should be 5 A with LM73605, or 6 A with LM73606.

  • Page 4: Detailed Descriptions

    VIN-EMI — Input voltage to input filter of the converter If the input filter is desired between the supply voltage and the LM73605/6, connect the supply voltage between VIN-EMI and GND-EMI. The supply voltage should be connected to the board with short and thick wires to handle pulsing input current.
  • Page 5 VIN (VIS), VOUT (VOS_P), and GND (VSNS-). See the schematic in Figure 4 all the signals connected to the edge connector. SNVU579 – September 2017 LM73605 / LM73606 EVM User’s Guide Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...

  • Page 6: Schematic

    Section 6. The LM73605EVM_5V_400K Schematic is shown in Figure 4 as an example. Figure 4. LM73605EVM_5V_400K Schematic LM73605 / LM73606 EVM User’s Guide SNVU579 – September 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...

  • Page 7: Board Layout

    The 12-pin edge connector can also be used to facilitate the use of a cable harness if one is required. Figure 5. Top Layer and Silkscreen Layer SNVU579 – September 2017 LM73605 / LM73606 EVM User’s Guide Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
  • Page 8 Board Layout www.ti.com Figure 6. Top Layer Routing Figure 7. Mid-Layer 1 Ground Plane LM73605 / LM73606 EVM User’s Guide SNVU579 – September 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
  • Page 9 Board Layout www.ti.com Figure 8. Mid-Layer 2 Routing Figure 9. Bottom Layer Routing SNVU579 – September 2017 LM73605 / LM73606 EVM User’s Guide Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...

  • Page 10: Bill Of Materials

    Bill of Materials www.ti.com Bill of Materials There are three sets of variants for the LM73605/LM73606 EVM, as shown in Table 2. The bills of materials of the three variants are shown in Table Table 4 Table Table 3. LM73605EVM-5V-2MHz 5-A 2.2-MHz EVM Bill of Materials...
  • Page 11 0603 L-IN Inductor, Shielded, Composite, 2.2uH, 12.9A, Coilcraft XAL7030-222MEB 0.0137 ohm, SMD RSYNC RES, 100, 1%, 0.1 W, 0603 Vishay-Dale CRCW0603100RFKEA SNVU579 – September 2017 LM73605 / LM73606 EVM User’s Guide Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...
  • Page 12 0603 L-IN Inductor, Shielded, Composite, 2.2uH, 12.9A, Coilcraft XAL7030-222MEB 0.0137 ohm, SMD RSYNC RES, 100, 1%, 0.1 W, 0603 Vishay-Dale CRCW0603100RFKEA LM73605 / LM73606 EVM User’s Guide SNVU579 – September 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated...

  • Page 13: Performance Curves

    0.01 0.02 0.05 0.1 0.2 2 3 4 56 Load Current (A) Load Current (A) EFF_ EFF_ Figure 10. LM73605 5-V 2.2-MHz Efficiency in Auto Mode Figure 11. LM73605 5-V 2.2-MHz Efficiency in FPWM Mode 5.05 5.16 5.04 5.12 5.03 5.08...
  • Page 14 0.01 0.02 0.05 0.1 0.2 2 3 4 56 Load Current (A) Load Current (A) EFF_ EFF_ Figure 16. LM73605 5-V 400-kHz Efficiency in Auto Mode Figure 17. LM73605 5-V 400-kHz Efficiency in FPWM Mode 5.05 5.16 5.04 5.12 5.03 5.08...
  • Page 15 DIV AC) Time (200 µs/DIV) Figure 26. LM73606 5-V 400-kHz Load Transient V = 12 V, Figure 27. LM73605 5-V 400-kHz EVM Thermal Picture with = 10 mA to 6 A to 10 mA = 12 V I = 6 A SNVU579 –...
  • Page 16 (20 mV/DIV) CISPR22 ClassB CISPR25 Class5 (5 V/DIV) Time (500 µs/DIV) Figure 30. LM73605 400-kHz Board Radiated EMI Result vs CISPR25 Limits, with I = 4 A LM73605 / LM73606 EVM User’s Guide SNVU579 – September 2017 Submit Documentation Feedback...
  • Page 17 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 18 FCC Interference Statement for Class B EVM devices NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
  • Page 19 【無線電波を送信する製品の開発キットをお使いになる際の注意事項】 開発キットの中には技術基準適合証明を受けて いないものがあります。 技術適合証明を受けていないもののご使用に際しては、電波法遵守のため、以下のいずれかの 措置を取っていただく必要がありますのでご注意ください。 1. 電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用 いただく。 2. 実験局の免許を取得後ご使用いただく。 3. 技術基準適合証明を取得後ご使用いただく。 なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。 上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。 日本テキサス・イ ンスツルメンツ株式会社 東京都新宿区西新宿６丁目２４番１号 西新宿三井ビル 3.3.3 Notice for EVMs for Power Line Communication: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page 電力線搬送波通信についての開発キットをお使いになる際の注意事項については、次のところをご覧ください。http:/ /www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page 3.4 European Union 3.4.1 For EVMs subject to EU Directive 2014/30/EU (Electromagnetic Compatibility Directive): This is a class A product intended for use in environments other than domestic environments that are connected to a low-voltage power-supply network that supplies buildings used for domestic purposes.
  • Page 20 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 © 2017, Texas Instruments Incorporated...
  • Page 21 IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES Texas Instruments Incorporated (‘TI”) technical, application or other design advice, services or information, including, but not limited to, reference designs and materials relating to evaluation modules, (collectively, “TI Resources”) are intended to assist designers who are developing applications that incorporate TI products;...
  • Page 22 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Texas Instruments LM73605EVM-5V-2MHZ LM73605EVM-5V-400K LM73606EVM-5V-400K...

This manual is also suitable for:

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