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User's Guide
LMR43620-Q1 EVM User's Guide
The Texas Instruments LMR43620RQ5EVM-400 evaluation module (EVM) helps designers evaluate the
operation and performance of the LMR43620-Q1 wide-input buck converter. The LMR43620-Q1 is an easy-to-
use synchronous step-down voltage converter capable of driving up to 2 A of load current from an input voltage
of up to 36 V. The LMR43620RQ5EVM-400 features an output voltage of 5 V and a switching frequency of 400
kHz. See the data sheet for additional features, detailed descriptions, and available options.
EVM
LMR43620RQ5EVM-400
1
Setup........................................................................................................................................................................................3
Points..........................................................................................................................................................................3
1.2
Jumpers..............................................................................................................................................................................4
2
Operation.................................................................................................................................................................................5
Start..........................................................................................................................................................................5
3
Schematic................................................................................................................................................................................6
Layout...........................................................................................................................................................................7
5 Bill of Materials.....................................................................................................................................................................
..........................................................................................................................................................................12
Figure 1-1. EVM Board Connections...........................................................................................................................................
Figure 1-2. Jumper Locations......................................................................................................................................................
SNVU837 - JANUARY 2023
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ABSTRACT
Table 1-1. Device and Package Configurations
U1
FREQUENCY
LMR43620RS5QRPERQ1
LMR43620RQ5EVM-400 Board
Table of Contents
Results.............................................................................................................................12
List of Figures
Schematic.........................................................................................................................6
Copyright © 2023 Texas Instruments Incorporated
SPREAD SPECTRUM
400 kHz
Enabled
Table of Contents
CURRENT
PIN 1 TRIM
2 A
RT
LMR43620-Q1 EVM User's Guide
10
3
4
1
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Summary of Contents for Texas Instruments LMR43620RQ5EVM-400
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Page 1: Table Of Contents
2 A of load current from an input voltage of up to 36 V. The LMR43620RQ5EVM-400 features an output voltage of 5 V and a switching frequency of 400 kHz. See the data sheet for additional features, detailed descriptions, and available options. - Page 2 COUT............13 ≅ 42°C/W..............Figure 6-11. Thermal Capture, 12 V , 5 V , 2-A Load, 400 kHz, ϴ Figure 6-12. LMR43620RQ5EVM-400 Low Frequency Conducted EMI Results 12.5 V , 5 V = 2 A (Green- Average Scan and Yellow-Peak Scan)...........................14 Figure 6-13.
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Page 3: Setup
Make sure R9 (RJM) is installed and R8 (RT) is not installed when using jumper J3 (JRT) to connect the RT pin to Vcc or to GND. Input Supply Load Figure 1-1. EVM Board Connections SNVU837 – JANUARY 2023 LMR43620-Q1 EVM User’s Guide Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 4: Jumpers
1 MHz. Remove resistor R8 (RT) for proper operation. Resistor R9 (RJM) must be populated. Figure 1-2. Jumper Locations LMR43620-Q1 EVM User’s Guide SNVU837 – JANUARY 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 5: Operation
4. Turn on the power supply. With the default configuration, the EVM powers up and provides V = 5 V. 5. Monitor the output voltage. The maximum load current is rated at 2 A with the LMR43620-Q1 device. SNVU837 – JANUARY 2023 LMR43620-Q1 EVM User’s Guide Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 6: Schematic
Schematic www.ti.com 3 Schematic Figure 3-1. LMR43620RQ5EVM-400 Schematic LMR43620-Q1 EVM User’s Guide SNVU837 – JANUARY 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 7: Board Layout
Board Layout 4 Board Layout Figure 4-1. Top View of EVM Figure 4-2. EVM Top Copper Layer SNVU837 – JANUARY 2023 LMR43620-Q1 EVM User’s Guide Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 8: Figure 4-3. Mid-Layer One
Board Layout www.ti.com Figure 4-3. Mid-Layer One Figure 4-4. Mid-Layer Two LMR43620-Q1 EVM User’s Guide SNVU837 – JANUARY 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 9: Figure 4-5. Evm Bottom Copper Layer
Board Layout Figure 4-5. EVM Bottom Copper Layer SNVU837 – JANUARY 2023 LMR43620-Q1 EVM User’s Guide Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 10: Bill Of Materials
Terminal, Turret, TH, Double Keystone 1502-2 TP7, TP9 TP10, TP11, TP12, PGOOD, SYNC, Test Point, Multipurpose, White, TH Keystone 5012 TP14 EN, VCC LMR43620-Q1 EVM User’s Guide SNVU837 – JANUARY 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... - Page 11 Test Point, Multipurpose, Black, TH Keystone 5011 LMR43620RS5QR 36-V, 2-A Buck Converter with 1.5-µA IQ in Texas Instruments LMR43620RS5QRPERQ1 PERQ1 2-mm × 2-mm HotRod QFN SNVU837 – JANUARY 2023 LMR43620-Q1 EVM User’s Guide Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated...
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Page 12: Test Results
Test Results www.ti.com 6 Test Results 6.1 LMR43620RQ5EVM-400 Test Results The LMR43620RQ5EVM-400 variant is used for the following images. 6.1.1 Efficiency and Load Regulation 5.01 VIN = 12 V VIN = 24 V 5.0085 VIN = 36 V 5.007 5.0055 5.004... -
Page 13: Figure 6-7. Load Transient 12 Vin , 5 Vout , Iout = 0 A To 2 A, Slew Rate = 1 A/Μs (Auto) With 3 × 22 Μf Cout
1 mA Load with 2 × 22 μF COUT ≅ 42°C/W Figure 6-11. Thermal Capture, 12 V , 5 V , 2-A Load, 400 kHz, ϴ SNVU837 – JANUARY 2023 LMR43620-Q1 EVM User’s Guide Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 14: Figure 6-13. Lmr43620Rq5Evm-400 High Frequency Conducted Emi Results 12.5
Frequency Conducted EMI Results 12.5 V = 2 A (Green-Average Scan and Yellow- = 2 A (Green-Average Scan and Yellow- Peak Scan) Peak Scan) LMR43620-Q1 EVM User’s Guide SNVU837 – JANUARY 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... - Page 15 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 16 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 17 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 18 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 19 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 © 2023, Texas Instruments Incorporated...
- Page 20 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 © 2023, Texas Instruments Incorporated...