Quad MxL7218
140A Multiphase
EVK User Manual
MaxLinear Confidential
TBD/18
• www.maxlinear.com
026UMR00• 026UMR00
i
Quad MxL7218 140A Multiphase EVK User Manual
Revision History
Revision History
Document No.
Release Date
Change Description
026UMR00
12/7/20
Initial Preliminary Release
12/7/20
026UMR00
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Quad MxL7218 140A Multiphase EVK User Manual
Table of Contents
Table of Contents
Introduction......................................................................................................................................................... 1
Quick EVK Set Up and Start Up ....................................................................................................................................1
Factory Settings ...................................................................................................................................................1
Quick Start Up ......................................................................................................................................................1
Reference Documentation ................................................................................................................................. 3
Ordering Information.......................................................................................................................................... 3
Evaluation Board Overview ............................................................................................................................... 4
Configuration and I/O Interfaces ....................................................................................................................... 5
EXT_CLK, Jumper JP1 .................................................................................................................................................5
RUN, Jumper JP2 .........................................................................................................................................................5
TRACK_CONTROL.......................................................................................................................................................5
PGOOD .........................................................................................................................................................................5
EXTVCC ........................................................................................................................................................................5
EXT PULSE...................................................................................................................................................................5
Set-Up Options.................................................................................................................................................... 6
Jumper JP1 CLK ...........................................................................................................................................................6
Jumper JP2 RUN ..........................................................................................................................................................6
Jumpers JP4 - JP8 VOUT SELECT ..............................................................................................................................6
Test Interfaces..................................................................................................................................................... 7
Load Transient Circuit ...................................................................................................................................................7
Performance........................................................................................................................................................ 8
Efficiency .......................................................................................................................................................................8
Load Transient Response .............................................................................................................................................8
Output Ripple ................................................................................................................................................................9
Thermal .........................................................................................................................................................................9
Quad MxL7218 EVK Schematic ....................................................................................................................... 10
Quad MxL7218 EVK PCB Layers..................................................................................................................... 14
Quad MxL7218 EVK Bill of Materials .............................................................................................................. 18
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Quad MxL7218 140A Multiphase EVK User Manual
List of Figures
List of Figures
Figure 1: Monitoring VIN and VOUT .........................................................................................................................................2
Figure 2: Top View of MxL7218 140A Multiphase EVK..........................................................................................................3
Figure 3: Quad MxL7218 140A Multiphase EVK Block Diagram ...........................................................................................4
Figure 4: Load Transient Circuit .............................................................................................................................................7
Figure 5: Measured Efficiency (VIN = 12V) .............................................................................................................................8
Figure 6: Load Transient Response, VIN = 12V, VOUT = 1V, 0A to 35A Load Step, fSW = 400kHz .......................................8
Figure 7: Measured Output Voltage Ripple (VIN = 12V, VOUT = 1V, Load = 140A, fSW = 400kHz)........................................9
Figure 8: Thermal Capture (VIN = 12V, VOUT = 1V, Load = 140A, fSW = 400kHz, 400LFM)..................................................9
Figure 9: EVK Schematic .....................................................................................................................................................10
Figure 10: EVK Schematic, Continued .................................................................................................................................11
Figure 11: EVK Schematic, Continued .................................................................................................................................12
Figure 12: EVK Schematic, Continued .................................................................................................................................13
Figure 13: EVK PCB Silkscreen Top ....................................................................................................................................14
Figure 14: EVK PCB Layer 1................................................................................................................................................14
Figure 15: EVK PCB Layer 2................................................................................................................................................15
Figure 16: EVK PCB Layer 3................................................................................................................................................15
Figure 17: EVK PCB Layer 4................................................................................................................................................16
Figure 18: EVK PCB Layer 5................................................................................................................................................16
Figure 19: EVK PCB Layer 6................................................................................................................................................17
Figure 20: EVK PCB Silkscreen Bottom...............................................................................................................................17
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Quad MxL7218 140A Multiphase EVK User Manual
List of Tables
List of Tables
Table 1: Evaluation Board Ordering Part Number ................................................................................................ 3
Table 2: Factory Settings...................................................................................................................................... 6
Table 3: JP1 Options ............................................................................................................................................ 6
Table 4: JP2 Options ............................................................................................................................................ 6
Table 5: JP4 - JP8 Options................................................................................................................................... 6
Table 6: EVK Bill of Materials ............................................................................................................................. 18
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Quad MxL7218 140A Multiphase EVK User Manual
Introduction
Introduction
The Quad MxL7218 140A Multiphase Evaluation Board provides a platform to evaluate the features and performance of
four MxL7218 Power Modules connected in parallel to supply up to a 140A load. Each MxL7218 is a dual 18A Power
Module which are optimized for powering Telecom, Networking and Industrial equipment. This manual covers both the BGA
and LGA evaluation boards versions of this 140A multiphase application.
Quick EVK Set Up and Start Up
Factory Settings
In addition to utilizing the 4.5V to 15V input voltage range of the MxL7218’s and the 140A maximum load current rating
capabilities of using the four MxL7218 Power Modules together, the evaluation board has been set up with the factory
default configurations shown below for quick set up and operation. Do not exceed the EVK maximum load current
rating.
The factory default configuration (Table 2) for the Quad MxL7218 Evaluation Board is:
■
■
VIN = 4.5V to 15V
■
■
■
■
VOUT = 1.0V ±1.5%. For other VOUT see Jumpers JP4 JP8 VOUT SELECT.
■
IOUT = 0A to 140A
■
■
400kHz switching frequency
Run is enabled for both channels of all 4 of the
MxL7218’s (all 8 channels). See RUN, Jumper JP2.
Continuous current mode using internal clock. To use
an external clock, see EXT_CLK, Jumper JP1
One pin output voltage ramp up and down tracking
programmability
A 6.5ms soft-start is selected for all channels
Sensing diode biasing at 100µA for internal
temperature sense
Quick Start Up
To quickly see the regulator in operation:
1. Use the factory settings and default configuration. If
other settings or components are desired, apply them
before the next steps and see Set-Up Options for more.
2. With a power supply turned off and within a VIN
specification of 4.5V to 15V (12V typical), connect it to
VIN and GND with short, thick leads. Use test pins
VIN+ and VIN- to monitor VIN and GND respectively.
See locations in Figure 1.
3. For the output, connect a meter and electronic load
initially set to 0A, that will be no more than the above
maximum IOUT (140A ), to VOUT and GND with short /
thick leads capable of this current. See setup and
locations in Figure 1.
12/7/20
4. Turn on the power supply and check VOUT. Check to
make sure that JP2 is on the ON position. The EVK will
power up and (factory default) regulate the output at 1V
±1.5% (0.985V to 1.015V).
5. Set or vary the load (do not exceed the maximum IOUT)
and check VOUT and other desired performance levels
such as regulation and efficiency.
See Configuration and I/O Interfaces and Load Transient
Circuit for more on testing and monitoring.
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Quad MxL7218 140A Multiphase EVK User Manual
Quick EVK Set Up and Start Up
A
Load
+
A
+
V
-
V
+
VOUT
VIN
Figure 1: Monitoring VIN and VOUT
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Quad MxL7218 140A Multiphase EVK User Manual
Reference Documentation
Figure 2: Top View of MxL7218 140A Multiphase EVK
Reference Documentation
Please refer to the MxL7218 Data Sheet for additional information about the MxL7218. The datasheet includes a full list of
IC features, pinout, pin descriptions, typical performance characteristics and external component calculations. This manual
is meant to be used in conjunction with the datasheet.
This manual provides Quad MxL7218 EVK Schematic, Quad MxL7218 EVK PCB Layers and Quad MxL7218 EVK Bill of
Materials that can be utilized to assist in your board design. The schematics are also available on the MxL7218 product
page.
Ordering Information
Table 1: Evaluation Board Ordering Part Number(1)
Power Module
Evaluation Board
Description
MxL7218-ABA-T
MxL7218-EVK-2
Quad MxL7218 BGA Power Module Multiphase EVK
1. Refer to www.maxlinear.com/MxL7218 for most up-to-date Ordering Information.
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Quad MxL7218 140A Multiphase EVK User Manual
Evaluation Board Overview
Evaluation Board Overview
The block diagram shown in Figure 3 illustrates the 7 MxL7218 channels connected in parallel with the 8th channel as the
master and the connection points for VIN, VOUT, and VOUT2. Also represented are the CLKOUT to MODE_PLLIN
connections between the 4 MxL7218 ICs.
MxL7218
VOUT2
Load
VIN
MxL7218
A
+
V
+
-
-
VIN
A
MxL7218
VOUT
V
-
VOUT
+
MxL7218
0 - 140A
VOUT and VOUT2 connected via R22, R23, R24 and R26
VFB of all 8 channels connected
RUN of all 8 channels connected and connected to JP2
TRACK of all 8 channels connected and connected to TRACK_CONTROL point on board
PGOOD of all 8 channels (with pullups) connected and connected to PGOOD point on board
Figure 3: Quad MxL7218 140A Multiphase EVK Block Diagram
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Quad MxL7218 140A Multiphase EVK User Manual
Configuration and I/O Interfaces
Configuration and I/O Interfaces
EXT_CLK, Jumper JP1
Jumper J1 provides an option to connect and synchronize to an external clock or use an internal clock (default). See
EXT_CLK, Jumper JP1.
RUN, Jumper JP2
Jumper JP2 enables (ON) or disables (OFF) all 8 channels. See RUN, Jumper JP2.
TRACK_CONTROL
The board’s output voltage tracks the voltage on the TRACK_CONTROL test point when applied.
PGOOD
A PGOOD test point is provided for all 8 channels. PGOOD signals are tied to INTVCC through 10kΩ resistors.
EXTVCC
A connection point is provided to inject EXTVCC, if desired.
EXT PULSE
Used to test load transients. See Load Transient Circuit.
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Quad MxL7218 140A Multiphase EVK User Manual
Set-Up Options
Set-Up Options
Jumpers are factory installed per Table 2 to configure the EVK for operation. Jumper and testing options are described in
the next sections. Refer to the product datasheet for additional information.
Table 2: Factory Settings
Jumper
Label
Factory Setting
Description
JP1
CLK
Jumper 2-3
Internal clock
JP2
RUN
Jumper 1-2
On
JP4
0.9V
No Jumper
JP5
1.0V
Jumper 1-2
JP6
1.2V
No Jumper
JP7
1.5V
No Jumper
JP8
1.8V
No Jumper
VOUT SELECT
VOUT = 1.0V selected
Jumper JP1 CLK
Table 3: JP1 Options
Jumper Options
Description
Jumper 1-2
External clock may be applied to synchronize to.
Jumper 2-3 (default)
Internal clock.
Jumper JP2 RUN
Table 4: JP2 Options
Jumper Options
Description
Jumper 1-2 (default)
On, all channels are enabled.
Jumper 2-3
Off, all channels are disabled.
Jumpers JP4 - JP8 VOUT SELECT
Table 5: JP4 - JP8 Options
Jumper
JP4
JP5
JP6
JP7
JP8
12/7/20
Jumper Options
Description
Jumper 1-2
VOUT = 0.9V selected only.
No jumper (default)
VOUT = 0.9V not selected.
Jumper 1-2 (default)
VOUT = 1.0V selected only.
No jumper
VOUT = 1.0V not selected.
Jumper 1-2
VOUT = 1.2V selected only.
No jumper (default)
VOUT = 1.2V not selected.
Jumper 1-2
VOUT = 1.5V selected only.
No jumper (default)
VOUT = 1.5V not selected.
Jumper 1-2
VOUT = 1.8V selected only.
No jumper (default)
VOUT = 1.8V not selected.
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Quad MxL7218 140A Multiphase EVK User Manual
Test Interfaces
Test Interfaces
Load Transient Circuit
A load transient circuit is provided to allow optional testing of load transients. The EXT PULSE (E33) clock input is used to
drive the transient signal. The load step generated by the FETs (Q1 and Q2) is very fast; the step slew rate is >40A/µs for a
50A transient load test case.
To measure load transient response, use the circuit shown in Figure 4. Populate R101 and R102 and apply a small duty
cycle pulse signal to the EXT PULSE (E33) input (~ 1%). Adjust the amplitude of the EXT PULSE (E33) pulse to set the
load current. Start at a pulse amplitude of 2V and increase while monitoring the IOUT STEP (J12) voltage. The load current
at IOUT STEP (J12) is 5mV/A. For an example, a 100A load will occur when a 500mV pulse is observed at J12.
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12/7/20
026UMR00
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Quad MxL7218 140A Multiphase EVK User Manual
Performance
Performance
Efficiency
Efficiency (%)
100
90
80
VOUT = 1.8V
VOUT = 1.5V
70
VOUT = 1.2V
VOUT = 1.0V
60
VOUT = 0.9V
0
20
40
60
80
100
120
140
Load Current (A)
Figure 5: Measured Efficiency (VIN = 12V, fSW = 400kHz)
Load Transient Response
Figure 6: Load Transient Response, VIN = 12V, VOUT = 1V, 0A to 35A Load Step, fSW = 400kHz
12/7/20
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Quad MxL7218 140A Multiphase EVK User Manual
Output Ripple
Output Ripple
2. 140A load on J7 with standard demo circuit default setup.
Figure 7: Measured Output Voltage Ripple (VIN = 12V, VOUT = 1V, Load = 140A, fSW = 400kHz)
Thermal
3. Ambient temperature = 23.3°C, airflow = 400LFM, no heat sink.
Figure 8: Thermal Capture (VIN = 12V, VOUT = 1V, Load = 140A, fSW = 400kHz, 400LFM)
12/7/20
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Quad MxL7218 140A Multiphase EVK User Manual
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026UMR00
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Quad MxL7218 140A Multiphase EVK User Manual
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RI
Figure 10: EVK Schematic, Continued
12/7/20
026UMR00
11
Quad MxL7218 140A Multiphase EVK User Manual
Quad MxL7218 EVK Schematic
'
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RI
Figure 11: EVK Schematic, Continued
12/7/20
026UMR00
12
Quad MxL7218 140A Multiphase EVK User Manual
Quad MxL7218 EVK Schematic
9,1
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Figure 12: EVK Schematic, Continued
12/7/20
026UMR00
13
Quad MxL7218 140A Multiphase EVK User Manual
Quad MxL7218 EVK PCB Layers
Quad MxL7218 EVK PCB Layers
Figure 13: EVK PCB Silkscreen Top
Figure 14: EVK PCB Layer 1
12/7/20
026UMR00
14
Quad MxL7218 140A Multiphase EVK User Manual
Quad MxL7218 EVK PCB Layers
Figure 15: EVK PCB Layer 2
Figure 16: EVK PCB Layer 3
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15
Quad MxL7218 140A Multiphase EVK User Manual
Quad MxL7218 EVK PCB Layers
Figure 17: EVK PCB Layer 4
Figure 18: EVK PCB Layer 5
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Quad MxL7218 140A Multiphase EVK User Manual
Quad MxL7218 EVK PCB Layers
Figure 19: EVK PCB Layer 6
Figure 20: EVK PCB Silkscreen Bottom
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Quad MxL7218 140A Multiphase EVK User Manual
Quad MxL7218 EVK Bill of Materials
Quad MxL7218 EVK Bill of Materials
Table 6: EVK Bill of Materials
Item
Qty
Reference
Designator
Description
Manufacturer /
Part Number
1
1
PCB
MXL7218 Evaluation Board
MAXLINEAR
2
4
U1, U2, U3, U4
LGA-144
MAXLINEAR
MXL7218
15X15X4.41
3
2
Q1, Q2
MOSFET, N-CH, 40V, 14A
VISHAY
SUD50N04
TO-252
4
1
CIN1
CAP ALUM, 150UF,25V, 20%
Nichicon
UCD1E151MNL1GS
8.3X8.3MM
5
16
CIN3 - CIN10,
CIN12 - CIN19
CERAMIC CAP. 22uF, 25V, X5R, 10%
MURATA
GRM32ER61E226KE15L
1210
6
2
CIN2, CIN11
CERAMIC CAP. 1uF, 25V, X7R, 10%
KEMET
C1210C105K3RACTU
1210
12
COUT1, COUT5,
COUT7, COUT11,
COUT15, COUT18,
COUT20, COUT24,
COUT26, COUT30,
COUT34, COUT38
CERAMIC CAP. 100uF, 6.3V, X5R, 20%
MURATA
GRM32ER60J107ME20L
1210
8
10
COUT4, COUT6,
COUT10, COUT12,
COUT19, COUT23,
COUT25, COUT29,
COUT31, COUT37
CAP TANT POLY, 470uF, 4V, 12mOhm
PANASONIC
4TPE470MCL
2917(7343)
9
4
C4, C10, C19, C23
CERAMIC CAP. 2.2uF, 10V, X57R, 10%
MURATA
GRM188R71A225KE15D
0603
10
6
C6, C11, C18, C22,
C27, C28
CERAMIC CAP. 1.0uF, 16V, X7R, 10%
MURATA
GCM188R71C105KA64J
0603
11
3
C7, C24, C25
CERAMIC CAP. 0.1uF, 50V, X7R, 10%
MURATA
GRM188R71H104KA93D
0603
12
1
C1
CERAMIC CAP., 100pF, 50V, X7R, 10%
VISHAY VITRAMON
VJ0603Y101KXACW1BC
0603
13
1
C3
CERAMIC CAP., 1500pF, 50V, X7R, 10%
AVX Corp
06035C152KAZ2A
0603
14
15
C2, C5, C8, C9,
C12 - C17, C20,
C21, C26, C29, C30
DNP
DNP
DNP
15
4
R1, R3, R25, R29
Resistor 10.0 Ohm, 1/10W,1%,SMD
PANASONIC
ERJ-3EKF10R0V
0603
16
2
R4, R54
Resistor 10.0K Ohm, 1/10W,1%,SMD
PANASONIC
ERJ-3EKF1002V
0603
17
14
R6, R19, R20, R27,
R28, R32,
R33 - R35, R40,
R45, R46, R62, R63
Resistor 0.00 Ohm, Jumper, 1/10W, SMD
PANASONIC
ERJ-3GEY0R00V
0603
18
1
R15
Resistor 90.9K Ohm, 1/10W,1%,SMD
PANASONIC
ERJ-3EKF9092V
0603
7
12/7/20
026UMR00
Package
Size
18
Quad MxL7218 140A Multiphase EVK User Manual
Quad MxL7218 EVK Bill of Materials
Table 6: EVK Bill of Materials (Continued)
Item
Qty
Reference
Designator
Description
Manufacturer /
Part Number
Package
Size
19
1
R16
Resistor 60.4K Ohm, 1/10W,1%,SMD
PANASONIC
ERJ-3EKF6041V
0603
20
4
R22 - R24, R26
RES 0 OHM JUMPER 2010
VISHAY
WSL201000000ZEA9
2010
21
1
R17
Resistor 40.2K Ohm, 1/10W,1%,SMD
PANASONIC
ERJ-3EKF4022V
0603
22
1
R18
Resistor 30.1K Ohm, 1/10W,1%,SMD
PANASONIC
ERJ-3EKF3012V
0603
23
1
R60
Resistor 0.00 Ohm, Jumper, 1/4W, SMD
PANASONIC
ERJ-8GEY0R00V
1206
24
2
R56, R57
Resistor 0.01Ohm, 2W,1%, SMD
ROHM
PMR100HZPFU10L0
2512
25
4
R9, R31, R43, R51
RES, 0603 100k 1% 1/10W
VISHAY
CRCW0603100KFKEA
0603
26
5
R2, R14, R21, R39,
R47
Resistor 121K Ohm, 1/10W,1%,SMD
PANASONIC
ERJ-3EKF1213V
0603
27
1
R7
Resistor 10K Ohm, 1/10W,1%,SMD
PANASONIC
ERJ-3EKF1002V
0603
28
1
R8
Resistor 3.24K Ohm, 1/10W,1%,SMD
PANASONIC
ERJ-3EKF3241V
0603
29
14
R5, R10, R30, R37,
R38, R42, R44,
R48 - R50, R52,
R53, R55, R61
DNP
DNP
DNP
30
2
R58, R59
DNP
DNP
DNP
31
11
E1 - E4, E6 - E9,
E12, E13, E22
Terminal Turret Single Solder Terminal
Mill-Max Corp.
2308-2-00-80-00-00-07-0
32
2
E19, E20
Terminal Turret Connector
Mill-Max Corp.
2501-2-00-80-00-00-07-0
2.39mm
33
8
E5, E10, E11,
E14 - E18
DNP
DNP
DNP
34
1
E40
Single Pin
Wurth Elektronik
61300111121
2.54mm
35
2
JP1, JP2
3 Pin Header Single Row
Wurth Elektronik
62000311121
2MM
36
2
J7, J8
BNC Connevtor RCPT
DNP
112404
Through
Hole
37
5
JP4 - JP8
2 Pin Header Single Row
Wurth Elektronik
62000211121
2MM
38
6
J1 - J6
Broaching Stud
DNP
KFH-032-10ET
0.189"
12/7/20
026UMR00
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Quad MxL7218 140A Multiphase EVK User Manual
Disclaimer
MaxLinear, Inc.
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Carlsbad, CA 92008
760.692.0711 p.
760.444.8598 f.
www.maxlinear.com
The content of this document is furnished for informational use only, is subject to change without notice, and should not be construed as a commitment by
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