Texas Instruments LMR36015FSCEVM User manual

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LMR36015xxxEVM User’s Guide
User's Guide
SNVU636–November 2018
LMR36015xxxEVM User’s Guide
The Texas Instruments LMR36015FSCEVM and LMR36015AEVM evaluation modules (EVM) help
designers evaluate the operation and performance of the LMR36015-Q1 wide-input buck regulators. The
LMR36015-Q1 is an easy-to-use synchronous step-down DC/DC converter capable of driving up to 1.5 A
of load current from an input voltage of up to 60 V. The LMR36015FSCEVM features a selectable output
voltage of 3.3 V or 5 V and a switching frequency of 2.1 MHz. The LMR36015AEVM features a selectable
output voltage of 3.3 V or 5 V and a switching frequency of 400 kHz. See the LMR36015-Q1 data sheets
for additional features, detailed descriptions, and available options.
The EVM options are found in Table 1.
Table 1. Device and Package Configurations
EVM U1 FREQUENCY FPWM SPREAD SPECTRUM CURRENT
LMR36015AEVM LMR36015-Q1 400 kHz Disabled Disabled 1.5 A
LMR36015FSCEVM LMR36015-Q1 2.1 MHz Enabled Enabled 1.5 A
Contents
1 Posts, Probes, and Jumpers ............................................................................................... 3
2 Operation ..................................................................................................................... 5
3 Schematic..................................................................................................................... 6
4 Board Layout ................................................................................................................. 7
5 Bill of Materials ............................................................................................................. 13
6 Test Results................................................................................................................. 14
List of Figures
1 EVM Board Connections.................................................................................................... 3
2 Jumper Locations............................................................................................................ 4
3 LMR36015xxxEVM Schematic............................................................................................. 6
4 Top View of EVM ............................................................................................................ 7
5 EVM Top Copper Layer..................................................................................................... 8
6 EVM Mid Layer One......................................................................................................... 9
7 EVM Mid Layer Two ....................................................................................................... 10
8 EVM Bottom Copper Layer ............................................................................................... 11
9 EVM Bottom View.......................................................................................................... 12
10 LMR36015AEVM 5 VOUT Efficiency ...................................................................................... 14
11 LMR36015AEVM 3.3 VOUT Efficiency .................................................................................... 14
12 LMR36015AEVM 5 VOUT Load Regulation .............................................................................. 14
13 LMR36015AEVM 3.3 VOUT Load Regulation............................................................................ 14
14 LMR36015AEVM 5 VOUT Load Transient, 24 VIN, IOUT = 0 A to 1.5 A, TR= TF= 1 µs.............................. 15
15 LMR36015AEVM 3.3 VOUT Load Transient, 24 VIN, IOUT = 0 A to 1.5 A, TR= TF= 1 µs............................ 15
16 LMR36015AEVM 5 VOUT Start-Up Waveform, 24 VIN,1.5 A Load .................................................... 15
17 LMR36015AEVM 3.3 VOUT Start-Up Waveform, 24 VIN,1.5 A Load.................................................. 15
18 LMR36015A Low Frequency Conducted EMI Results for 5 VOUT (Blue-Average and Yellow-Peak) ........... 16
19 LMR36015AEVM High Frequency Conducted EMI Results for 5 VOUT (Blue-Average and Yellow-Peak)...... 16

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20 LMR36015FSCEVM 5 VOUT Efficiency................................................................................... 17
21 LMR36015FSCEVM 3.3 VOUT Efficiency................................................................................. 17
22 LMR36015FSCEVM 5 VOUT Load Regulation........................................................................... 17
23 LMR36015FSCEVM 3.3 VOUT Load Regulation ........................................................................ 17
24 LMR36015FSCEVM 5 VOUT Load Transient, 12 VIN, IOUT = 0 A to 1.5 A, TR= TF= 1 µs .......................... 18
25 LMR36015FSCEVM 3.3 VOUT Load Transient, 12 VIN, IOUT = 0 A to 1.5 A, TR= TF= 1 µs........................ 18
26 LMR36015FSCEVM 5 VOUT Start-Up Waveform, 12 VIN,1.5 A Load................................................. 18
27 LMR36015FSCEVM 3.3 VOUT Start-Up Waveform, 24 VIN,1.5 A Load .............................................. 18
28 LMR36015FSCEVM Low Frequency Conducted EMI Results for 3.3 VOUT With Spread Spectrum (Blue-
Average and Yellow-Peak)................................................................................................ 19
29 LMR36015FSCEVM High Frequency Conducted EMI Results for 3.3 VOUT With Spread Spectrum (Blue-
Average and Yellow-Peak)................................................................................................ 19
List of Tables
1 Device and Package Configurations ...................................................................................... 1
2 Bill of Materials ............................................................................................................. 13
Trademarks
All trademarks are the property of their respective owners.

VOUT
Connection:
Load
VIN
Connection
with EMI Filter:
Input Supply
VIN
Connection:
Input Supply
www.ti.com Posts, Probes, and Jumpers
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1 Posts, Probes, and Jumpers
This section describes the test points and connectors on the EVM and how to properly connect, set up,
and use the LMR36015AEVM and the LMR36015FSCEVM.
1.1 Screw Terminal Connectors
The screw terminals on the top of the board can be used for connecting to the input and output of the
EVM. See Figure 1 for the screw terminal connections. The functions of the screw terminal connections
are:
•VIN - Input supply to EVM. Connect to a suitable input supply. See LMR36015-Q1 data sheet for input
supply requirements.
•GND - System ground.
•IN+ - Input supply to EVM including an EMI filter. Connect to a suitable input supply. See LMR36015-
Q1 data sheet for input supply requirements.
•IN– - System ground including an EMI filter.
•VOUT - Output of EVM — connect to desired load.
Figure 1. EVM Board Connections

Power Good
Jumper Enable Jumper
Feedback
Jumper
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1.2 Jumpers
See Figure 2 for jumper locations.
•EN - This jumper allows the ENABLE input to be connected to either GND (OFF) or VIN (ON). The 2-
to-3 position enables the device; while the 1-to-2 position disables the device. Remove this jumper to
allow an external logic signal to control the EN function.
•VOUT - Use this jumper to select one of the two pre-defined output voltages. The 2-to-3 position
provides a 3.3-V output; while the 1-to-2 position provides a 5-V output.
•PGOOD - Use this jumper to select the PGOOD pullup configuration. PGOOD can be connected to
either VOUT or VCC. The 2-to-3 position connects PGOOD to VOUT, while the 1-to-2 position
connects PGOOD to VCC.
Figure 2. Jumper Locations
1.3 Test Points
•VOUTS - Output voltage sense connection; connect to DMM. Also, use for frequency response
analyzer connection.
•VINS - Input voltage sense connection; connect to DMM.
•GNDS1 and GNDS2 - Ground sense point for analog measurements; connect to DMM.
•VCC - Test point to measure internal VCC of device; approximately 5 V.
•EN - Connection for external EN logic input. Remove EN jumper and connect controlling logic to EN
test point for external enable control.
•PGOOD - Power-good flag output. This test point is connected to VCC or VOUT through a 100-kΩ
resistor. The power-good function can be monitored at this test point.

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2 Operation
2.1 Quick Start
1. Connect the voltage supply between VIN and GND screw terminal connectors using short and thick
wires.
2. Connect the load between VOUT and GND screw terminal connectors using short and thick wires.
3. Set the supply voltage at an appropriate level between 4.2 V to 60 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 = 5 V.
5. Monitor the output voltage. The maximum load current must be 1.5 A with the LMR36015-Q1 device.
2.2 Efficiency Measurement
1. Connect power supply to VIN and GND screw terminal connectors and make sure the power supply
provides sufficient current.
NOTE: There is no reverse polarity protection or fuse on the evaluation board.
2. Connect electronic load to VOUT and GND screw terminal connectors. For all power wires it is
preferable to use twisted lab wires. If the power supply wires are very long > 50 cm, solder an
additional 470-µF, 100-V bulk capacitor to posts VIN and GND. Use sufficient power wires to avoid
voltage drops, and use short sense probe connection for the measurement.
NOTE: These sense lines are not designed to carry power.
3. To accurately sense input and output voltage use the test points VINS, VOUTS, and GNDS.
Alternatively, sense wires can be soldered directly over input capacitors CIN1 or CIN2 and the output
capacitors CO1 or CO2.
4. Make sure the IC is enabled by having jumper J5 set to [EN-VIN] and check that test point EN is driven
high. While measuring IQ(unloaded input current) remove all the input and output voltage probes that
are most likely causing additional current draw.
2.3 Measure Load Transient
1. Connect power supply to VIN and GND screw terminal connectors, and make sure the power supply
can provide sufficient peak current.
NOTE: There is no reverse polarity protection or fuse on the evaluation board.
2. Connect transient load to VOUT and GND screw terminal connectors. For all power wires use
preferable twisted lab wires. If the power supply wires are very long > 50 cm, solder an additional 470-
µF, 100-V bulk capacitor to posts VIN and GND. Use short sense probe connection for the
measurement.
3. To accurately sense the output voltage, place the scope probe directly over the output capacitors CO1
or CO2. Make sure to connect scope probe GND ring directly to the output capacitor GND pad for
minimal ground loop. Ground loops can introduce ringing in observed waveforms, which is an artifact
and not present on the PCB. Alternatively, use differential probe over output capacitors CO1 or CO2. Do
not use wires to differential probe and always probe directly with shortest possible pins. Make sure the
IC is enabled by having jumper J5 set to [EN-VIN] and check test point EN is driven high and not
drooping during the load transient.

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3 Schematic
Figure 3. LMR36015xxxEVM Schematic

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4 Board Layout
Figure 4. Top View of EVM

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Figure 5. EVM Top Copper Layer

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Figure 6. EVM Mid Layer One

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Figure 7. EVM Mid Layer Two

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Figure 8. EVM Bottom Copper Layer

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Figure 9. EVM Bottom View

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5 Bill of Materials
Table 2. Bill of Materials
Designator Description Manufacturer Part Number Quantity
C5 CAP, AL, 68 µF, 63 V, +/- 20%, 0.65 ohm,
AEC-Q200 Grade 2, SMD Panasonic EEE-FK1J680UP 0
C7, C8 CAP, CERM, 2.2 µF, 100 V,+/- 10%, X7R,
1206 MuRata GRM31CR72A225KA73L 2
C9, C10, C13 CAP, CERM, 0.047 µF, 100 V, +/- 10%,
X7S, 0603 TDK CGA3E3X7S2A473K080AB 3
C11 CAP, CERM, 4.7 µF, 100 V, +/- 10%, X7S,
AEC-Q200 Grade 1, 1210 TDK CGA6M3X7S2A475K200A 1
C16 CAP, CERM, 0.1 uF, 25 V, +/- 10%, X7R,
0402 MuRata GRM155R71E104KE14D 1
C17 CAP, CERM, 1 uF, 25 V, +/- 10%, X7R,
0603 TDK C1608X7R1E105K080AB 1
C18 CAP, CERM, 22 pF, 50 V,+/- 5%, C0G/NP0,
AEC-Q200 Grade 1, 0603 TDK CGA3E2C0G1H220J080AA 1
H1, H2, H3, H4 Machine Screw, Round, #4-40 x 1/4, Nylon,
Philips panhead B&F Fastener Supply NY PMS 440 0025 PH 2
H5, H6, H7, H8 Standoff, Hex, 0.5"L #4-40 Nylon Keystone 1902C 4
J1, J2, J3 Terminal Block, 3.5mm Pitch, 2x1, TH On-Shore
Technology ED555/2DS 3
J4, J5, J6 Header, 100mil, 3x1, Gold, TH Samtec HTSW-103-07-G-S 3
L2 Inductor, Shielded, Composite, 1 uH, 8.75 A,
0.01 ohm, SMD Coilcraft XAL4020-102MEB 1
L3 Ferrite Bead, 600 ohm @ 100 MHz, 3 A,
1210 Taiyo Yuden FBMH3225HM601NT 1
LBL1 Thermal Transfer Printable Labels, 0.650" W
x 0.200" H - 10,000 per roll Brady THT-14-423-10 1
R1, R2 RES, 10.0 k, 1%, 0.1 W, 0603 Vishay-Dale CRCW060310K0FKEA 2
R3 RES, 100 k, 1%, 0.1 W, 0603 Vishay-Dale CRCW0603100KFKEA 1
R4 RES, 135 k, 0.1%, 0.1 W, 0603 Yageo America RT0603BRD07135KL 1
R5 RES, 100 k, 1%, 0.1 W, 0603 Yageo America RC0603FR-07100KL 1
R6 RES, 24.9 k, 1%, 0.1 W, 0603 Vishay-Dale CRCW060324K9FKEA 1
SH-J1, SH-J2,
SH-J3 Shunt, 100mil, Gold plated, Black 3M 969102-0000-DA 3
TP1, TP4 Test Point, Multipurpose, Red, TH Keystone 5000 2
TP2, TP3 Test Point, Multipurpose, Black, TH Keystone 5001 2
TP5, TP6, TP7 Test Point, Multipurpose, Yellow, TH Keystone 5014 3
LMR36015AEVM: Adjustable 3.3V/5V Output, 400kHz, 1.5A
U1 4.2V to 60V, 1.5A Synchronous Step-Down Texas Instruments LMR36015AQRNXRQ1 1
C1, C2, C3, C4 CAP, CERM, 22 µF, 16 V, +/- 10%, X7R,
1210 MuRata GRM32ER71C226KE18L 4
C12, C14 CAP, CERM, 2.2 µF, 100 V,+/- 10%, X7R,
1206 MuRata GRM31CR72A225KA73L 2
C15 CAP, CERM, 0.047 µF, 100 V, +/- 10%,
X7S, 0603 TDK CGA3E3X7S2A473K080AB 1
L1 Inductor, Shielded, Composite, 10 uH, 3 A,
0.084 ohm, SMD Coilcraft XAL4040-103MEB 1
LMR36015FSCEVM: Adjustable 3.3V/5V Output, 2.1MHz, 1.5A
U1 4.2V to 60V, 1.5A Synchronous Step-Down Texas Instruments LMR36015FSCQRNXRQ1 1
C1, C2 CAP, CERM, 22 µF, 16 V, +/- 10%, X7R,
1210 MuRata GRM32ER71C226KE18L 2
C6 CAP, AL, 47 uF, 80 V, +/- 20%, 0.7 ohm,
SMD Chemi-Con EMZA800ADA470MJA0G 1

Output Current (A)
Output Voltage (V)
0 0.25 0.5 0.75 1 1.25 1.5
4.96
4.98
5
5.02
5.04
5.06
5.08
LMR3
8 VIN
12 VIN
24 VIN
48 VIN
60 VIN
Output Current (A)
Output Voltage (V)
0 0.25 0.5 0.75 1 1.25 1.5
3.28
3.29
3.3
3.31
3.32
3.33
3.34
LMR3
6 VIN
12 VIN
24 VIN
48 VIN
60 VIN
Output Current (A)
Efficiency
0.001 0.005 0.02 0.05 0.1 0.20.3 0.5 1 2
0
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
LMR3
8 VIN
12 VIN
24 VIN
48 VIN
60 VIN
Output Current (A)
Efficiency
0.001 0.005 0.02 0.05 0.1 0.20.3 0.5 1 2
0
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
LMR3
6 VIN
12 VIN
24 VIN
48 VIN
60 VIN
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Table 2. Bill of Materials (continued)
Designator Description Manufacturer Part Number Quantity
L1 Inductor, Shielded, Composite, 2.2 uH, 5.6
A, 0.04 ohm, SMD Coilcraft XAL4020-222MEB 1
6 Test Results
Section 6.1 details the test results from the LMR36015AEVM variant. Section 6.2 details the test results
from the LMR36015FSCEVM.
6.1 LMR36015AEVMTest Results
The LMR36015AEVM variant is used for all figures from Figure 10 to Figure 19 variant.
6.1.1 Efficiency and Load Regulation
Figure 10. LMR36015AEVM 5 VOUT Efficiency Figure 11. LMR36015AEVM 3.3 VOUT Efficiency
Figure 12. LMR36015AEVM 5 VOUT Load Regulation Figure 13. LMR36015AEVM 3.3 VOUT Load Regulation

VOUT
100mV/div
ILOAD
370mA/div
PG
5V/div
100µs/div
VOUT
100mV/div
ILOAD
370mA/div
PG
5V/div
100µs/div
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6.1.2 Load Transients
Figure 14. LMR36015AEVM 5 VOUT Load Transient, 24 VIN,
IOUT = 0 A to 1.5 A, TR= TF= 1 µs Figure 15. LMR36015AEVM 3.3 VOUT Load Transient, 24 VIN, IOUT = 0 A to 1.5 A, TR= TF= 1 µs
6.1.3 Start Up Waveforms
Figure 16. LMR36015AEVM 5 VOUT Start-Up Waveform,
24 VIN,1.5 A Load Figure 17. LMR36015AEVM 3.3 VOUT Start-Up Waveform,
24 VIN,1.5 A Load

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6.1.4 Conducted EMI
Figure 18. LMR36015A Low Frequency Conducted EMI
Results for 5 VOUT (Blue-Average and Yellow-Peak) Figure 19. LMR36015AEVM High Frequency Conducted
EMI Results for 5 VOUT (Blue-Average and Yellow-Peak)

Output Current (A)
Output Voltage (V)
0 0.25 0.5 0.75 1 1.25 1.5
4.94
4.96
4.98
5
5.02
5.04
LMR3
8 VIN
12 VIN
24 VIN
Output Current (A)
Output Voltage (V)
0 0.25 0.5 0.75 1 1.25 1.5
3.27
3.275
3.28
3.285
3.29
3.295
3.3
3.305
3.31
3.315
3.32
LMR3
6 VIN
12 VIN
18 VIN
Output Current (A)
Efficiency
0 0.25 0.5 0.75 1 1.25 1.5
0
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
LMR3
8 VIN
12 VIN
24 VIN
Output Current (A)
Efficiency
0 0.25 0.5 0.75 1 1.25 1.5
0
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
LMR3LMR3
6 VIN
12 VIN
18 VIN
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6.2 LMR36015FSCEVM Test Results
The LMR36015FSCEVM variant is used for all figures from Figure 20 to Figure 29.
6.2.1 Efficiency and Load Regulation
Figure 20. LMR36015FSCEVM 5 VOUT Efficiency Figure 21. LMR36015FSCEVM 3.3 VOUT Efficiency
Figure 22. LMR36015FSCEVM 5 VOUT Load Regulation Figure 23. LMR36015FSCEVM 3.3 VOUT Load Regulation

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6.2.2 Load Transients
Figure 24. LMR36015FSCEVM 5 VOUT Load Transient, 12
VIN, IOUT = 0 A to 1.5 A, TR= TF= 1 µs Figure 25. LMR36015FSCEVM 3.3 VOUT Load Transient, 12 VIN, IOUT = 0 A to 1.5 A, TR= TF= 1 µs
6.2.3 Start Up Waveforms
Figure 26. LMR36015FSCEVM 5 VOUT Start-Up Waveform,
12 VIN,1.5 A Load Figure 27. LMR36015FSCEVM 3.3 VOUT Start-Up Waveform, 24 VIN,1.5 A Load

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6.2.4 Conducted EMI Results
Figure 28. LMR36015FSCEVM Low Frequency Conducted
EMI Results for 3.3 VOUT With Spread Spectrum (Blue-
Average and Yellow-Peak)
Figure 29. LMR36015FSCEVM High Frequency Conducted
EMI Results for 3.3 VOUT With Spread Spectrum (Blue-
Average and Yellow-Peak)

STANDARD TERMS FOR EVALUATION MODULES
1. 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. User's acceptance of the EVM is expressly subject to the following terms.
1.1 EVMs are intended solely for product or software developers for use in a research and development setting to facilitate feasibility
evaluation, experimentation, or scientific analysis of TI semiconductors products. EVMs have no direct function and are not
finished products. EVMs shall not be directly or indirectly assembled as a part or subassembly in any finished product. For
clarification, any software or software tools provided with the EVM (“Software”) shall not be subject to the terms and conditions
set forth herein but rather shall be subject to the applicable terms that accompany such Software
1.2 EVMs are not intended for consumer or household use. EVMs may not be sold, sublicensed, leased, rented, loaned, assigned,
or otherwise distributed for commercial purposes by Users, in whole or in part, or used in any finished product or production
system.
2Limited Warranty and Related Remedies/Disclaimers:
2.1 These terms do not apply to Software. The warranty, if any, for Software is covered in the applicable Software License
Agreement.
2.2 TI warrants that the TI EVM will conform to TI's published specifications for ninety (90) days after the date TI delivers such EVM
to User. Notwithstanding the foregoing, TI shall not be liable for a nonconforming EVM if (a) the nonconformity was caused by
neglect, misuse or mistreatment by an entity other than TI, including improper installation or testing, or for any EVMs that have
been altered or modified in any way by an entity 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 in the EVMs within ten (10)
business days after delivery, or of any hidden defects with ten (10) business days after the defect has been detected.
2.3 TI's sole liability shall be at its option to repair or replace EVMs that fail to conform to the warranty set forth above, or credit
User's account for such EVM. TI's liability under this warranty shall be limited to EVMs that are returned during the warranty
period to the address designated by TI and that are determined by TI not to conform to such warranty. If TI elects to repair or
replace such EVM, TI shall have a reasonable time to repair such EVM or provide replacements. Repaired EVMs shall be
warranted for the remainder of the original warranty period. Replaced EVMs shall be warranted for a new full ninety (90) day
warranty period.
3Regulatory 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. This kit is not a finished product and when assembled may not be resold or
otherwise marketed unless all required FCC equipment authorizations are first obtained. Operation is subject to the condition
that this product not cause harmful interference to licensed radio stations and that this product accept harmful interference.
Unless the assembled kit is designed to operate under part 15, part 18 or part 95 of this chapter, the operator of the kit must
operate under the authority of an FCC license holder or must secure an experimental authorization under part 5 of this chapter.
3.1.2 For EVMs annotated as FCC – FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant:
CAUTION
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not
cause harmful interference, and (2) this device must accept any interference received, including interference that may cause
undesired operation.
Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to
operate the equipment.
FCC Interference Statement for Class A EVM devices
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to
correct the interference at his own expense.