User's Guide
SNVU580 – November 2018
LMR360xxxEVM User’s Guide
The Texas Instruments LMR36015A and LMR36006B evaluation modules (EVM) help designers evaluate
the operation and performance of the LMR36015 and LMR36006 wide-input buck regulators. The
LMR36015 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 LMR36006 uses the same EVM PCB and
components, but the current limit is modified to 0.6 A. The LMR360xxxEVMs feature a selectable output
voltage of 3.3 V or 5 V and a switching frequency of 400 kHz and 1 MHz. See the LMR36006 and
LMR36015 data sheets for additional features, detailed descriptions, and available options.
The EVM options are found in Table 1.
Table 1. Device and Package Configurations
1
2
3
4
5
6
EVM
U1
FREQUENCY
Output Current
LMR36015AEVM
LMR36015
400 kHz
1.5 A
LMR36006BEVM
LMR36006
1 MHz
600 mA
Contents
Posts, Probes, and Jumpers ............................................................................................... 3
Operation ..................................................................................................................... 5
Schematic ..................................................................................................................... 6
Board Layout ................................................................................................................. 7
Bill of Materials ............................................................................................................. 13
Test Results ................................................................................................................. 14
List of Figures
1
EVM Board Connections.................................................................................................... 3
2
Jumper Locations ............................................................................................................ 4
3
LMR360xxxEVM 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
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
LMR36006BEVM 5 VOUT Efficiency
19
LMR36006BEVM 3.3 VOUT Efficiency .................................................................................... 16
......................................................................................
......................................................................................
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16
1
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20
LMR36006BEVM 5 VOUT Load Regulation .............................................................................. 16
21
LMR36006BEVM 3.3 VOUT Load Regulation ............................................................................ 16
22
LMR36006BEVM 5 VOUT Load Transient, 24 VIN, IOUT = 0 A to 0.6 A, TR = TF = 1 µs .............................. 17
23
LMR36006BEVM 3.3 VOUT Load Transient, 24 VIN, IOUT = 0 A to 0.6 A, TR = TF = 1 µs............................ 17
24
LMR36006BEVM 5 VOUT Start-Up Waveform, 24 VIN,1.5 A Load .................................................... 17
25
LMR36006BEVM 3.3 VOUT Start-Up Waveform, 24 VIN,1.5 A Load .................................................. 17
List of Tables
1
Device and Package Configurations ...................................................................................... 1
2
Bill of Materials
.............................................................................................................
13
Trademarks
All trademarks are the property of their respective owners.
2
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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 LMR36006BEVM.
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 LMR36006 data sheet and
LMR36015 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 LMR36006
data sheet and LMR36015 data sheet for input supply requirements.
• IN– - System ground including an EMI filter.
• VOUT - Output of EVM — connect to desired load.
VOUT
Connection:
Load
VIN
Connection
with EMI Filter:
Input Supply
VIN
Connection:
Input Supply
Figure 1. EVM Board Connections
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Posts, Probes, and Jumpers
1.2
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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 2to-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.
Feedback
Jumper
Power Good
Jumper
Enable Jumper
Figure 2. Jumper Locations
1.3
Test Points
•
•
•
•
•
•
4
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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Operation
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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 device or
600 mA with the LMR36006 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 470µF, 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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Schematic
3
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Schematic
Figure 3. LMR360xxxEVM Schematic
6
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Board Layout
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Board Layout
Figure 4. Top View of EVM
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Board Layout
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Figure 5. EVM Top Copper Layer
8
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Board Layout
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Figure 6. EVM Mid Layer One
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Board Layout
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Figure 7. EVM Mid Layer Two
10
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Board Layout
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Figure 8. EVM Bottom Copper Layer
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Board Layout
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Figure 9. EVM Bottom View
12
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Bill of Materials
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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
C9, C10
CAP, CERM, 0.047 µF, 100 V, +/- 10%,
X7S, 0603
TDK
CGA3E3X7S2A473K080AB
2
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
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
U1
4.2V to 60V, 1.5A Synchronous Step-Down
Texas Instruments
LMR36015
1
L1
Inductor, Shielded, Composite, 10 uH, 3 A,
0.084 ohm, SMD
Coilcraft
XAL4040-153MEB
1
L2
Inductor, Shielded, Composite, 1 uH, 8.75 A,
0.01 ohm, SMD
Coilcraft
XAL4040-102MEB
1
L3
Ferrite Bead, 600 ohm @ 100 MHz, 3 A,
1210
Taiyo Yuden
FBMH3225HM601NT
1
C1, C2, C3, C4
CAP, CERM, 22 µF, 16 V, +/- 10%, X7R,
1210
MuRata
GRM32ER71C226KE18L
4
C6
CAP, AL, 47 uF, 80 V, +/- 20%, 0.7 ohm,
SMD
Chemi-Con
EMZA800ADA470MJA0G
1
C7, C8, C12, C14
CAP, CERM, 2.2 µF, 100 V,+/- 10%, X7R,
1206
MuRata
GRM31CR72A225KA73L
4
C13, C15
CAP, CERM, 0.047 µF, 100 V, +/- 10%,
X7S, 0603
TDK
CGA3E3X7S2A473K080AB
2
U1
4.2V to 60V, 0.6A Synchronous Step-Down
Texas Instruments
LMR36006
1
L1
Inductor, Shielded, Composite, 15 uH, 2.8 A,
0.109 ohm, SMD
Coilcraft
XAL4040-153MEB
1
C1, C2, C3
CAP, CERM, 22 µF, 16 V, +/- 10%, X7R,
1210
MuRata
GRM32ER71C226KE18L
3
LMR36015AEVM: Adjustable 3.3V/5V Output, 400kHz, 1.5A
LMR36006BEVM: Adjustable 3.3V/5V Output, 1MHz, 0.6A
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Test Results
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Test Results
Section 6.1 details the test results from the LMR36015AEVM variant. Section 6.2 details the test results
from the LMR36006BEVM.
6.1
LMR36015AEVMTest Results
The LMR36015AEVM variant is used for all figures from Figure 10 to Figure 17 variant.
Efficiency and Load Regulation
100%
100%
90%
90%
80%
80%
70%
70%
60%
60%
Efficiency
Efficiency
6.1.1
50%
40%
30%
10%
0
0.001
0.005
0.02 0.05 0.1 0.20.3 0.5
Output Current (A)
1
40%
30%
8 VIN
12 VIN
24 VIN
48 VIN
60 VIN
20%
50%
6 VIN
12 VIN
24 VIN
48 VIN
60 VIN
20%
10%
0
0.001
2
Figure 10. LMR36015AEVM 5 VOUT Efficiency
1
2
LMR3
3.34
5.04
5.02
5
4.98
6 VIN
12 VIN
24 VIN
48 VIN
60 VIN
3.33
Output Voltage (V)
8 VIN
12 VIN
24 VIN
48 VIN
60 VIN
5.06
Output Voltage (V)
0.02 0.05 0.1 0.20.3 0.5
Output Current (A)
Figure 11. LMR36015AEVM 3.3 VOUT Efficiency
5.08
3.32
3.31
3.3
3.29
4.96
3.28
0
0.25
0.5
0.75
1
Output Current (A)
1.25
1.5
0
0.25
LMR3
Figure 12. LMR36015AEVM 5 VOUT Load Regulation
14
0.005
LMR3
0.5
0.75
1
Output Current (A)
1.25
1.5
LMR3
Figure 13. LMR36015AEVM 3.3 VOUT Load Regulation
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Test Results
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6.1.2
Load Transients
PG
5V/div
PG
5V/div
VOUT
100mV/div
VOUT
100mV/div
ILOAD
370mA/div
ILOAD
370mA/div
100µs/div
100µs/div
Figure 14. LMR36015AEVM 5 VOUT Load Transient, 24 VIN,
IOUT = 0 A to 1.5 A, TR = TF = 1 µs
6.1.3
Figure 15. LMR36015AEVM 3.3 VOUT Load Transient, 24 VIN,
IOUT = 0 A to 1.5 A, TR = TF = 1 µs
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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Test Results
6.2
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LMR36006BEVM Test Results
The LMR36006BEVM variant is used for all figures from Figure 18 to Figure 25.
Efficiency and Load Regulation
100%
100%
90%
90%
80%
80%
70%
70%
60%
60%
Efficiency
Efficiency
6.2.1
50%
40%
30%
10%
0
0.001 0.002
0.005 0.01 0.02
0.05 0.1
Output Current (A)
0.2 0.3 0.5
40%
30%
8 VIN
12 VIN
24 VIN
48 VIN
60 VIN
20%
50%
6 VIN
12 VIN
24 VIN
48 VIN
60 VIN
20%
10%
0
0.001 0.002
1
LMR3
Figure 18. LMR36006BEVM 5 VOUT Efficiency
1
LMR3
3.34
5.04
5.02
5
4.98
6 VIN
12 VIN
24 VIN
48 VIN
60 VIN
3.33
Output Voltage (V)
8 VIN
12 VIN
24 VIN
48 VIN
60 VIN
5.06
Output Voltage (V)
0.2 0.3 0.5
Figure 19. LMR36006BEVM 3.3 VOUT Efficiency
5.08
3.32
3.31
3.3
3.29
4.96
3.28
0
0.1
0.2
0.3
0.4
Output Current (A)
0.5
0.6
0
0.1
LMR3
Figure 20. LMR36006BEVM 5 VOUT Load Regulation
16
0.005 0.01 0.02
0.05 0.1
Output Current (A)
0.2
0.3
0.4
Output Current (A)
0.5
0.6
LMR3
Figure 21. LMR36006BEVM 3.3 VOUT Load Regulation
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6.2.2
Load Transients
PG
5V/div
PG
5V/div
VOUT
100mV/div
100µs/div
ILOAD
150mA/div
Figure 22. LMR36006BEVM 5 VOUT Load Transient, 24 VIN,
IOUT = 0 A to 0.6 A, TR = TF = 1 µs
6.2.3
VOUT
100mV/div
100µs/div
ILOAD
150mA/div
Figure 23. LMR36006BEVM 3.3 VOUT Load Transient, 24 VIN,
IOUT = 0 A to 0.6 A, TR = TF = 1 µs
Start Up Waveforms
Figure 24. LMR36006BEVM 5 VOUT Start-Up Waveform,
24 VIN,1.5 A Load
Figure 25. LMR36006BEVM 3.3 VOUT Start-Up Waveform,
24 VIN,1.5 A Load
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