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2

SNVU672 – February 2020

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Copyright © 2020, Texas Instruments Incorporated

LMR36503RFEVM User’s Guide

Contents

1

Setup

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3

2

Operation

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5

3

Schematic

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6

4

Board Layout

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7

5

Bill of Materials

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9

List of Figures

1

LMR36503RFEVM Board

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1

2

EVM Board Connections

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3

3

Jumper Locations

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4

4

LMR36503RFEVM Schematic

.............................................................................................

6

5

Top View of EVM

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7

6

EVM Top Copper Layer

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7

7

EVM Mid Layer One

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7

8

EVM Mid Layer Two

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8

9

EVM Bottom Copper Layer

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8

List of Tables

1

Device and Package Configurations

......................................................................................

1

2

Bill Of Materials

..............................................................................................................

9

Trademarks

All trademarks are the property of their respective owners.

Содержание LMR36503RFEVM

Страница 1: ...synchronous step down DC DC converter capable of driving up to 0 3 A of load current from an input voltage of up to 65 V The LMR36503RFEVM features an output voltage of 3 3 V or 5 V and a switching frequency of 1 MHz See the LMR36503 3 V 65 V 0 3 A Ultra Small Synchronous Buck Converter with Ultra Low IQ data sheet for additional features detailed descriptions and available options Table 1 Device ...

Страница 2: ... 7 5 Bill of Materials 9 List of Figures 1 LMR36503RFEVM Board 1 2 EVM Board Connections 3 3 Jumper Locations 4 4 LMR36503RFEVM Schematic 6 5 Top View of EVM 7 6 EVM Top Copper Layer 7 7 EVM Mid Layer One 7 8 EVM Mid Layer Two 8 9 EVM Bottom Copper Layer 8 List of Tables 1 Device and Package Configurations 1 2 Bill Of Materials 9 Trademarks All trademarks are the property of their respective owner...

Страница 3: ...round connection VIN Input supply to the IC Can be connected to DMM to measure input voltage after EMI filter VOUT Output voltage test point of EVM Can be connected to a desired load EN This test point is connected to the EN pin By default there is a pullup resistor R2 RENT to VIN to enable the IC PGOOD This test point is connected to the PGOOD pin from the IC It is an open drain output of the PGO...

Страница 4: ...this jumper to select the mode of operation in a MODE SYNC trim part Connecting a jumper between pin 1 and 2 cause the IC to operate in PFM Pulse Frequency Modulation mode for a higher efficiency at light load A jumper between pin 2 and pin 3 causes the IC to operate in FPWM mode Forced Pulse Width Modulation mode By default the jumper is connected between pin 1 and 2 In an RT trim part connecting...

Страница 5: ...n the VIN_EMI and GND test points 2 Connect the load between the VOUT and GND test points 3 Set the supply voltage at an appropriate level between 5 5 V to 65 V Set the current limit of the supply to an appropriate level 4 Turn on the power supply With the default configuration the EVM powers up and provides VOUT 3 3 V 5 Monitor the output voltage The maximum load current must be 0 3 A with the LM...

Страница 6: ...RFBT GND 22uF C5 COUT1 22uF C10 COUT2 DNP 10pF C13 CFF DNP 0 R4 RMODE VOUT 3 3V B A VIN VINEMI GND VOUT VOS AGND TP13 VCC TP12 SW TP14 GND 43 2k R7 RFBB1 59 0k R10 RFBB2 1 2 J4 JVOUT RT 1 PGOOD 2 EN UVLO 3 VIN 4 SW 5 BOOT 6 VCC 7 FB 8 GND 9 LMR36503RFRPET U1 39 2k R5 RT DNP 47uH L1 1 2 3 4 5 6 7 8 9 10 11 12 A B C D E F H J K L M N TOP BOT EC1 305 024 521 201 0 1uF C3 CB SH J1 SNT 100 BK G Assembl...

Страница 7: ... 7 SNVU672 February 2020 Submit Documentation Feedback Copyright 2020 Texas Instruments Incorporated LMR36503RFEVM User s Guide 4 Board Layout Figure 5 Top View of EVM Figure 6 EVM Top Copper Layer Figure 7 EVM Mid Layer One ...

Страница 8: ...d Layout www ti com 8 SNVU672 February 2020 Submit Documentation Feedback Copyright 2020 Texas Instruments Incorporated LMR36503RFEVM User s Guide Figure 8 EVM Mid Layer Two Figure 9 EVM Bottom Copper Layer ...

Страница 9: ... 102 07 G S 2 L1 MSS6132 473MLB Inductor Shielded Drum Core Ferrite 47 µH 0 93 A 0 38 Ω SMD Coilcraft MSS6132 473MLB 1 L2 FBMH3225HM601 NT Ferrite Bead 600 Ω at 100 MHz 3 A 1210 Taiyo Yuden FBMH3225HM601NT 1 LBL1 THT 14 423 10 Thermal Transfer Printable Labels 0 650 W x 0 200 H 10 000 per roll Brady THT 14 423 10 1 R1 RENB RES 100 k 1 0 063 W AEC Q200 Grade 0 0402 Vishay Dale CRCW0402100KFKED 0 R2...

Страница 10: ...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...

Страница 11: ... 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...

Страница 12: ...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...

Страница 13: ... 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...

Страница 14: ...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...

Страница 15: ...se resources are subject to 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...

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