MxL7218
18A Dual Phase
EVB User Manual
MaxLinear Confidential
TBD/18
• www.maxlinear.com
020UMR02• 020UMR02
i
MxL7218 18A Dual Phase EVB User Manual
Revision History
Revision History
Document No.
Release Date
Change Description
020UMR02
10/5/20
Initial release.
10/5/20
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MxL7218 18A Dual Phase EVB User Manual
Table of Contents
Table of Contents
Introduction......................................................................................................................................................... 1
Quick EVB Set Up and Start Up ....................................................................................................................................1
Factory Settings ...................................................................................................................................................1
Quick Start Up ......................................................................................................................................................1
Reference Documentation ................................................................................................................................. 4
Ordering Information.......................................................................................................................................... 4
Evaluation Board Overview ............................................................................................................................... 5
Configuration and I/O Interfaces ....................................................................................................................... 6
MODE............................................................................................................................................................................6
RUN1, RUN2 .................................................................................................................................................................6
TRACK1 SEL, TRACK2 SEL ........................................................................................................................................6
PHASMD .......................................................................................................................................................................6
EXTVCC ........................................................................................................................................................................6
TEMP ............................................................................................................................................................................6
PGOOD1, PGOOD2......................................................................................................................................................6
SW1, SW2 .....................................................................................................................................................................6
Set-Up Options.................................................................................................................................................... 7
Jumper J44 MODE ........................................................................................................................................................7
Jumpers J30 RUN1 and J29 RUN2...............................................................................................................................7
Jumper J26 TRACK1 SEL.............................................................................................................................................7
Jumper J25 TRACK2 SEL.............................................................................................................................................8
Jumper J45 PHASMD ...................................................................................................................................................8
Test Interfaces..................................................................................................................................................... 9
Load Transient Circuit ...................................................................................................................................................9
MxL7218 EVB Mode Selection.................................................................................................................................... 10
Performance...................................................................................................................................................... 12
Efficiency ..................................................................................................................................................................... 12
Load Transient Response ........................................................................................................................................... 13
Ripple ..........................................................................................................................................................................14
Thermal ....................................................................................................................................................................... 15
MxL7218EVB Schematic .................................................................................................................................. 16
MxL7218EVB PCB Layers ................................................................................................................................ 19
MxL7218EVB Bill of Materials.......................................................................................................................... 21
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List of Figures
List of Figures
Figure 1: Monitoring VIN and VOUT .........................................................................................................................................2
Figure 2: Top View of MxL7218 18A Dual Phase BGA EVB..................................................................................................3
Figure 3: Block Diagram MxL7218 Two Channel EVB...........................................................................................................5
Figure 4: Load Transient Circuit .............................................................................................................................................9
Figure 5: Mode 1 Block Diagram ..........................................................................................................................................11
Figure 6: Mode 2 Block Diagram ..........................................................................................................................................11
Figure 7: Mode 3 Block Diagram ..........................................................................................................................................11
Figure 8: Mode 4 Block Diagram ..........................................................................................................................................11
Figure 9: Mode 5 Block Diagram ..........................................................................................................................................11
Figure 10: Mode 6 Block Diagram ........................................................................................................................................11
Figure 11: Channel 1 Measured Efficiency (VOUT = 1.5V, fSW = 500kHz, Ch 2 Disabled) ................................ ...................12
Figure 12: Channel 2 Measured Efficiency (VOUT = 1.0V, fSW = 500kHz, Ch 1 Disabled) ................................ ...................12
Figure 13: Channel 1 Load Transient Response (VOUT = 1.5V, VIN = 12V).........................................................................13
Figure 14: Channel 2 Load Transient Response (VOUT = 1.0V, VIN = 12V).........................................................................13
Figure 15: Channel 1 Output Voltage Ripple (VIN = 12V, VOUT = 1.5V, Load = 18A, 500kHz) ......................... ...................14
Figure 16: Channel 2 Output Voltage Ripple (VIN = 12V, VOUT = 1V, Load = 18A, 500kHz) ...............................................14
Figure 17: Thermal Image, No Airflow..................................................................................................................................15
Figure 18: EVB Schematic ...................................................................................................................................................16
Figure 19: EVB Schematic, Continued .................................................................................................................................17
Figure 20: EVB Schematic, Continued .................................................................................................................................18
Figure 21: EVB PCB BGA Silkscreen Top ...........................................................................................................................19
Figure 22: EVB PCB BGA Layer 1 .......................................................................................................................................19
Figure 23: EVB PCB BGA Layer 2 .......................................................................................................................................19
Figure 24: EVB PCB BGA Layer 3 .......................................................................................................................................19
Figure 25: EVB PCB BGA Layer 4 .......................................................................................................................................20
Figure 26: EVB PCB BGA Layer 5 .......................................................................................................................................20
Figure 27: EVB PCB BGA Layer 6 .......................................................................................................................................20
Figure 28: EVB PCB BGA Silkscreen Bottom ......................................................................................................................20
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List of Tables
List of Tables
Table 1: Evaluation Board Ordering Part Number..................................................................................................................4
Table 2: Factory Settings........................................................................................................................................................7
Table 3: J44 Options ..............................................................................................................................................................7
Table 4: J30, J29 Options.......................................................................................................................................................7
Table 5: J26 Options ..............................................................................................................................................................7
Table 6: J25 Options ..............................................................................................................................................................8
Table 7: J45 Options ..............................................................................................................................................................8
Table 8: Board Stuffing for Operation Mode Selection .........................................................................................................10
Table 9: EVB BGA Bill of Materials ...................................................................................................................................... 21
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MxL7218 18A Dual Phase EVB User Manual
Introduction
Introduction
The MxL7218 evaluation board provides a platform to evaluate the features and performance of the MxL7218. The
MxL7218 is a dual 18A Power Module optimized for powering Telecom, Networking and Industrial equipment. This EVB
board supports 3 options: MxL7225, MxL7225-1, and MxL7218. This manual covers the 18A Dual Phase BGA Evaluation
Board for the MxL7218 Power Module.
Quick EVB Set Up and Start Up
Factory Settings
In addition to utilizing the 4.5V to 15V input voltage range and dual 18A maximum load current rating capabilities of the
MxL7218 Power Module, the Evaluation Board has been set up with the factory default configurations shown below for
quick set up and operation. Do not exceed the EVB maximum load current rating.
The factory default configuration (Table 2) for the MxL7218 Evaluation Board is:
■
■
■
■
■
VOUT1 = 1.5V ±1.5%
VOUT2 = 1.0V ±1.5%
■
500kHz Switching Frequency
CCM mode. For other modes, see Jumper J44 MODE.
■
Run is enabled for both channels. See Jumpers J30
RUN1 and J29 RUN2.
Soft-start is selected for both channels. See Jumper
J26 TRACK1 SEL and Jumper J25 TRACK2 SEL.
CLKOUT phase is 90 degrees, see Jumper J45
PHASMD.
Quick Start Up
VOUT2_GND (J61) to monitor VOUT2 and GND
respectively. See locations in Figure 1.
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. Connect a turned-off power supply that is within a VIN
specification of 4.5V to 15V, (12V typical) 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 channel 1 output, connect an electronic load
initially set to 0A, that will be no more than the above
maximum IOUT (18A ), to VOUT1 and GND with short /
thick leads. Use test pins VOUT1 (J52) and
VOUT1_GND (J60) to monitor VOUT1 and GND
respectively. See locations in Figure 1.
4. For the channel 2 output, connect an electronic load
initially set to 0A, that will be no more than the above
maximum IOUT (18A ), to VOUT2 and GND with short,
thick leads. Use test pins VOUT2 (J53) and
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5. Turn on the power supply and check VOUT of both
channels. The EVB will power up and (factory default)
regulate the channel 1 output at 1.5V ±1.5% (1.4775V
to 1.5225V) and channel 2 output at 1.0V ±1.5%
(0.985V to 1.015V). Output ripple should bemeasured
across the output capacitors for each channel: C8 for
VOUT1 and C22 for VOUT2. The test points J52 and
J53 can be used to monitor the VOUT1 and VOUT2
outputs, respectively.
6. 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. For Single Rail
Dual Phase 36A Operation and to vary VOUT see MxL7218
EVB Mode Selection.
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MxL7218 18A Dual Phase EVB User Manual
-
Load
-
A
Quick EVB Set Up and Start Up
V
+
+
V
-
+
+
-
A
+
VIN
A
Load
V
+ -
Figure 1: Monitoring VIN and VOUT
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Quick EVB Set Up and Start Up
Figure 2: Top View of MxL7218 18A Dual Phase BGA EVB
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MxL7218 18A Dual Phase EVB User Manual
Reference Documentation
Reference Documentation
Please refer to the MxL7218 Data Sheet for additional information about the MxL7218, including efficiency curves for this
configuration with VIN = 12V. The datasheet also 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 EVB schematics, PCB layout and 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
Power Module
Evaluation Board
Description
MxL7218-ABA-T
MxL7218-EVK-1
MxL7218 BGA Evaluation Board, Single Device, Dual Output
1. Refer to www.maxlinear.com/MxL7218 for most up-to-date Ordering Information.
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MxL7218 18A Dual Phase EVB User Manual
Evaluation Board Overview
Evaluation Board Overview
The block diagram shown in Figure 3 illustrates the connection points for the VIN, VOUT1, VOUT2, TRACK, MODE_PLL
and RUN pins.
VIN
CONNECTOR
VOUT1
CONNECTOR
J9
(J26)
TRACK1
SELECT
JUMPER
TRACK1
(J30)
RUN1
SELECT
JUMPER
RUN1
(J44)
MODE
SELECT
JUMPER
MODE
(J25)
TRACK2
SELECT
JUMPER
TRACK2
(J29)
RUN2
SELECT
JUMPER
RUN2
(J45)
PHASMD
SELECT
JUMPER
PHASMD
J6
VOUT1
VIN
MxL7218
VOUT2
CONNECTOR
J16
VOUT2
OUTPUT
CONFIG
OPTION
VOUT1
CONNECTOR
J6
TRANSIENT LOAD
CIRCUIT
VOUT1
VOUT2
DIFF
SENSE
OPTION
VOUT2
CONNECTOR
J16
IOSTEP
CONNECTOR
J58
Figure 3: Block Diagram MxL7218 Two Channel EVB
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MxL7218 18A Dual Phase EVB User Manual
Configuration and I/O Interfaces
Configuration and I/O Interfaces
MODE
The MODE (J44) jumper is provided for overall device configuration:
Force Continuous Mode, Pulse-Skipping Mode and External Synchronization are selectable.
RUN1, RUN2
A RUN jumper is provided for both channels (J30 for RUN1 and J29 for RUN2).
TRACK1 SEL, TRACK2 SEL
A TRACK jumper is provided for both channels.
VOUT, EXT and SOFTSTART are selectable.
Test points are allocated for probing of TRACK1 (J26) and TRACK2 (J25).
PHASMD
A CLKOUT (J45) jumper is provided for clock phase selection.
60, 90 or 120 degrees of phase offset is configurable.
EXTVCC
An EXTVCC test point (J2) is provided to monitor or inject EXTVCC.
TEMP
A TEMP test point (J3) is provided to monitor temperature.
PGOOD1, PGOOD2
A PGOOD test point is provided for both channels (J24 for PGOOD1 and J23 for PGOOD2).
Both PGOOD signals are tied to INTVCC through 10kΩ resistors.
Note: The silkscreen on the evaluation board is reversed for PGOOD1 and PGOOD2.
SW1, SW2
A SW test point is provided for both switching signals (TP1 for SW1 and TP2 for SW2).
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MxL7218 18A Dual Phase EVB User Manual
Set-Up Options
Set-Up Options
Jumpers are factory installed per Table 2 to configure the EVB 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
J44
MODE
Jumper 3-4
FCM
J30
RUN1
Jumper 1-2
On
J29
RUN2
Jumper 1-2
On
J26
TRACK1
Jumper 5-6
Soft-Start
J25
TRACK2
Jumper 5-6
Soft-Start
J45
PHASMD
No Jumper
90°
Jumper J44 MODE
Table 3: J44 Options
Jumper Options
Description
Jumper 1-2
PSM - Pulse Skipping Mode.
Jumper 3-4
FCM - Force Continuous Mode.
Pin 6
Apply an external clock to pin 6 to put both channels into continuous mode, synchronized to the applied clock.
Jumpers J30 RUN1 and J29 RUN2
Table 4: J30, J29 Options
Jumper Options
Description
Jumper 1-2
On. RUN1/2 connected to VIN.
Jumper 2-3
Off. RUN1/2 connected to GND.
Jumper J26 TRACK1 SEL
Table 5: J26 Options
Jumper Options
Description
Jumper 1-2
VOUT2 master track mode.
Jumper 3-4
External master track mode.
Jumper 5-6
Soft start. Track1 connected to cap to GND.
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MxL7218 18A Dual Phase EVB User Manual
Jumper J25 TRACK2 SEL
Jumper J25 TRACK2 SEL
Table 6: J25 Options
Jumper Options
Description
Jumper 1-2
VOUT1 master track mode.
Jumper 3-4
External master track mode.
Jumper 5-6
Soft start. Track1 connected to cap to GND.
Jumper J45 PHASMD
Table 7: J45 Options
Jumper Options
Description
Jumper 1-2
120°
No Jumper
90°
Jumper 2-3
60°
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MxL7218 18A Dual Phase EVB User Manual
Test Interfaces
Test Interfaces
Load Transient Circuit
A load transient circuit is provided to allow optional testing of load transients. The IOSTEP clock input is used to drive the
transient signal. The load step generated by the FET (Q1) is very fast; the step slew rate is >40A/µs for a 9A transient load
test case.
To measure load transient response for either channel, use the circuit shown in Figure 4. To test CH1, populate R56 and
depopulate R57 and apply a small duty cycle pule signal to IOSTEP CLK input (~ 1%). Adjust the amplitude of the
IOSTEP CLK pulse to set the load current. Start at a pulse amplitude of 2V and increase while monitoring the IOSTEP
(J59) voltage. The load current at IOSTEP (J59) is 10mV/A. For an example, a 9A load will occur when a 90mV pulse is
observed at J59.
To test load transient response on CH2, depopulate R56 and populate R57 and repeat procedure.
R56
R57
0 Ohm
DNP
(1,2) VOUT1
VOUT2 (1,2)
J60
1
0603 C38
1uF
0603 C39
1uF J61
1
3
Q1
SUD50N04
1
C40 0603 C41 0603
1uF
1uF
2
IOSTEP_CLK
1
IOSTEP
2512
0.01 ohm
2512
J58
2
J59
2
R58
1
0603
R60
10 Kohm
R59
DNP
Figure 4: Load Transient Circuit
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MxL7218 18A Dual Phase EVB User Manual
MxL7218 EVB Mode Selection
MxL7218 EVB Mode Selection
The MxL7218 EVB can be configured for 6 different modes of operation:
■
■
■
■
■
■
Mode 1: Dual 18A with no remote sense amplifier
Mode 2: Dual 18A with remote sense amplifier on VOUT1
Mode 3: Dual 18A with remote sense amplifier on VOUT2
Mode 4: Single 36A with no remote sense amplifier
Mode 5: Single 36A with remote sense amplifier on VOUT1
Mode 6: Single 36A with remote sense amplifier on VOUT2
The stuffing options to configure the EVB into each of the 6 modes are shown below with the block diagram for each mode
on the next page.
Table 8: Board Stuffing for Operation Mode Selection
Pin
Function
Single Rail
Component
Mode 1
Dual Rail
Single Phase
Diff Amp
NC
Mode 2
Dual Rail
Single Phase
Diff Amp
VOUT1
Mode 3
Dual Rail
Single Phase
Diff Amp
VOUT2
Mode 4
Single Rail
Dual Phase
Diff Amp
NC
Mode 5
Single Rail
Dual Phase
Diff Amp
VOUT1
Mode 6
Single Rail
Dual Phase
Diff Amp
VOUT2
R5
DNP
DNP
DNP
0Ω
0Ω
0Ω
R50
DNP
DNP
DNP
0Ω
0Ω
0Ω
R51
DNP
DNP
DNP
0Ω
0Ω
0Ω
VOUTS1
R4
0Ω
DNP
0Ω
0Ω
DNP
DNP
VOUTS2
R7
0Ω
0Ω
DNP
DNP
DNP
DNP
DIFFP
(VOUT1+)
R34
DNP
0Ω
DNP
DNP
0Ω
DNP
DIFFP
(VOUT2+)
R40
DNP
DNP
0Ω
DNP
DNP
0Ω
DIFFN
(VOUT1-)
R54
DNP
0Ω
DNP
DNP
0Ω
DNP
DIFFN
(VOUT2-)
R55
DNP
DNP
0Ω
DNP
DNP
0Ω
DIFFOUT
(VOUTS1+)
R41
DNP
0Ω
DNP
DNP
0Ω
DNP
DIFFOUT
(VOUTS2+)
R42
DNP
DNP
0Ω
DNP
DNP
0Ω
TRACK
R45
DNP
DNP
DNP
0Ω
0Ω
0Ω
TRACK1
J26 (5-6)
On
On
On
On
On
On
TRACK2
J25 (5-6)
On
On
On
Off
Off
Off
RUN
R43
DNP
DNP
DNP
0Ω
0Ω
0Ω
COMP
R44
DNP
DNP
DNP
0Ω
0Ω
0Ω
PGOOD
R47
DNP
DNP
DNP
0Ω
0Ω
0Ω
VFB
R46
DNP
DNP
DNP
0Ω
0Ω
0Ω
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MxL7218 18A Dual Phase EVB User Manual
MODE 2
Dual Rail Single Phase
Diff Amp -> VOUT1
R2
VOUT1
VOUTS1
VOUT1_18 A
R4
R3
DIFFP
DIFFP
DIFFN
DIFFOUT
R8
VOUT2
R8
VOUT2
VOUT2_18 A
VOUT1
VOUTS1
VOUT1_18 A
R4
R3
DIFFP
R8
VOUT2+
VOUT2
VOUT2_18 A
R42
R9
R2
VOUT1+
VOUT_36 A
R41
R3
R8
VOUT2
VOUTS2
DIFFP
DIFFN
DIFFOUT
VOUT_36 A
R9
VOUT2-
R2
VOUT1+
VOUT_36 A
R3
R40
R55
VOUT1-
R8
VOUT2+
VOUT2
VOUTS2
VOUT2-
R42
R9
VOUT2+
VOUT_36 A
VOUT2-
Figure 10: Mode 6 Block Diagram
Figure 9: Mode 5 Block Diagram
10/5/20
VOUT1
VOUTS1
VOUT1R51
R34
R54
VOUT2+
Figure 8: Mode 4 Block Diagram
MODE 6
Single Rail Dual Phase
Diff Amp -> VOUT2
R5
DIFFP
DIFFN
DIFFOUT
R9
VOUT2-
R50
VOUT1
VOUTS1
VOUT1-
VOUT_36 A
VOUTS2
Figure 7: Mode 3 Block Diagram
MODE 5
Single Rail Dual Phase
Diff Amp -> VOUT1
VOUT_36 A
DIFFN
DIFFOUT
R8
VOUT2
VOUTS2
VOUT1+
R4
R3
VOUT1-
R40
R55
DIFFP
DIFFN
DIFFOUT
R2
VOUT1+
R5
VOUT1
VOUTS1
VOUT2-
Figure 6: Mode 2 Block Diagram
MODE 4
Single Rail Dual Phase
Diff Amp -> NC
R2
VOUT2_18 A
R9
VOUT2-
Figure 5: Mode 1 Block Diagram
MODE 3
Dual Rail Single Phase
Diff Amp -> VOUT2
VOUT2+
R7
VOUTS2
R9
VOUT1-
R34
R54
VOUT2+
R7
VOUTS2
VOUT1_18 A
R41
R3
VOUT1-
DIFFN
DIFFOUT
VOUT1+
R5
R50
R51
VOUT1
VOUTS1
R2
VOUT1+
R50
R51
MODE 1
Dual Rail Single Phase
Diff Amp -> NC
MxL7218 EVB Mode Selection
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MxL7218 18A Dual Phase EVB User Manual
Performance
Performance
Efficiency
95
Efficiency (%)
90
85
80
75
VIN = 5V
70
65
VIN = 12V
0
2
4
6
8
10
12
14
16
18
Load Current (A)
Figure 11: Channel 1 Measured Efficiency (VOUT = 1.5V, fSW = 500kHz, Ch 2 Disabled)
95
Efficiency (%)
90
85
80
75
VIN = 5V
70
65
VIN = 12V
0
2
4
6
8
10
12
14
16
18
Load Current (A)
Figure 12: Channel 2 Measured Efficiency (VOUT = 1.0V, fSW = 500kHz, Ch 1 Disabled)
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MxL7218 18A Dual Phase EVB User Manual
Load Transient Response
Load Transient Response
9A to 18A Load Step
1.5V Output (20MHz BW) [50mV/Div]
Figure 13: Channel 1 Load Transient Response (VOUT = 1.5V, VIN = 12V)
9A to 18A Load Step
1.0V Output (20MHz BW) [50mV/Div]
Figure 14: Channel 2 Load Transient Response (VOUT = 1.0V, VIN = 12V)
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MxL7218 18A Dual Phase EVB User Manual
Ripple
Ripple
Figure 15: Channel 1 Output Voltage Ripple (VIN = 12V, VOUT = 1.5V, Load = 18A, 500kHz)
Figure 16: Channel 2 Output Voltage Ripple (VIN = 12V, VOUT = 1V, Load = 18A, 500kHz)
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Thermal
Thermal
Figure 17: Thermal Image, No Airflow
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MxL7218 18A Dual Phase EVB User Manual
MxL7218EVB Schematic
MxL7218EVB Schematic
4
3
INTVCC
EXTVCC
EXTVCC
1
1
2
2
J2
1
TEMP_PWR
INTVCC
J3
VIN
VOUT1+ (2)
1
2
3
INTVCC
J1
2
1
2
3
5
1
C1
C33
0805 4.7uF 0603 1uF
TEMP
D
0603
R1
44.2 kOhms
VOUT1
(2,3)
Cout bulk:
- 2 @ 470 uF, 2.5 V, 3 mohm
- 2 optional
Cout ceramic:
- 1 @ 100 uF, 6.3 V, X5R, 1210
1
D
J52
J9
VIN
1
Jack_575-4
J11
GND
C
ceramic:
4 @ 22uF, 25 V, X5R, 1210
bulk:
1 @ 150 uF, 25 V, 14 mohm
VIN
C13
C11
T
1210
150uF
22uF
1
Jack_575-4
VIN-
J12
VIN
1
B
C12
1210
22uF
C14
1210
22uF
C15
1210
22uF
J2
J3
J4
J9
J10
J11
K2
K3
K4
K9
K10
K11
L2
L3
L4
L5
L6
L7
L8
L9
L10
L11
M2
M3
M4
M5
M6
M7
M8
M9
M10
M11
VIN_1
VIN_2
VIN_3
VIN_4
VIN_5
VIN_6
VIN_7
VIN_8
VIN_9
VIN_10
VIN_11
VIN_12
VIN_13
VIN_14
VIN_15
VIN_16
VIN_17
VIN_18
VIN_19
VIN_20
VIN_21
VIN_22
VIN_23
VIN_24
VIN_25
VIN_26
VIN_27
VIN_28
VIN_29
VIN_30
VIN_31
VIN_32
J6
J7
H8
J6
C2
T
470uF
TEMP
Cin
Cin
-
EXTVCC
1
INTVCC
VIN+
U1-1
C3
C4
T
1210
470uF
DNP
C5
1210
DNP
C6
1210
DNP
C7
1210
DNP
C8
1210
100uF
C9
T
DNP
C10
T
DNP
J54
VOUT1_0
VOUT1_1
VOUT1_2
VOUT1_3
VOUT1_4
VOUT1_5
VOUT1_6
VOUT1_7
VOUT1_8
VOUT1_9
VOUT1_10
VOUT1_11
VOUT1_12
VOUT1_13
MXL7218
VOUTS1
VOUTS2
VOUT2_13
VOUT2_12
VOUT2_11
VOUT2_10
VOUT2_9
VOUT2_8
VOUT2_7
VOUT2_6
VOUT2_5
VOUT2_4
VOUT2_3
VOUT2_2
VOUT2_1
VOUT2_0
VOUT1+
R2
0603 10 ohm
TEMP
J7
J4
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
VOUT1
1575
J8
GND
1575
1
R3
0603 10 ohm
VOUT1- 1
J10
VOUT1-
VOUT1- (2)
C
R4
0603 DNP
VOUT1
C5
VOUTS1 (2)
C8
C12
C11
C10
C9
B12
B11
B10
B9
B8
A12
A11
A10
A9
A8
2512
VOUTS2 (2)
R51
DNP
2512
R6
2512
DNP
R50
DNP
R7
0603 0 ohm
VOUT2+ (2)
1
J55
R8
0603 10 ohm
1
B
J53
J16
VOUT2
C17
C18
T
1210
470uF
DNP
C19
1210
DNP
C20
1210
DNP
C21
1210
DNP
VOUT2+
1
Cout bulk:
- 2 @ 470 uF, 2.5 V, 3 mohm
- 2 optional
Cout ceramic:
- 1 @ 100 uF, 6.3 V, X5R, 1210
C16
T
470uF
J15
C22
1210
100uF
C23
T
DNP
C24
T
DNP
VOUT2
1575
J17
GND
1575
VOUT2
R9
0603 10 ohm
(2,3)
VOUT2- 1
J18
VOUT2-
VOUT2- (2)
A
A
1060 Rincon Circle
San Jose, CA 95131
Title
B
Date:
5
4
3
2
Draw
MxL7218 EVK Schematic
Size
FCostescu
Document Number
Rev
710-MxL7225-EVK-100-A
Friday, April 03, 2020
Sheet
A
1
of
4
1
Figure 18: EVB Schematic
10/5/20
020UMR02
16
MxL7218 18A Dual Phase EVB User Manual
MxL7218EVB Schematic
FSET
TP
C25
0402 DNP
SW2
G8
TRACK2 SEL
J25
5
60.4 kohm
R21 0603
60.4 kohm
4
VIN
6
0603 C29
0.1 uF
R23
10K 0603
J29
1
2
3
ON
F9
INTVCC
RUN2
R62
0603 DNP
1
2
J35
1
2
J34
1
2
J33
R25
0603
3.32K
VFB2
C31
0603 DNP
2
J32
1
J31
2
F4
R27
VFB1
1
4
5
6
D5
1
2
3
VFB1 (3)
C32
DNP0603
R26
0603 3.32K
1
C30 0603
0.1 uF
J28
C
2
60.4 kohm
0603R22
60.4 kohm
J30
1
2
3
ON
OFF
RUN1
D2
B
DIFF AMP
C34
0603 R33
0603R32
0603 R31
0603 R30
0603 R29
DNP 0402
10 kohm
30.1kohm
60.4 kohm
90.9 kohms
150 kohm
R49
0402 DNP
R28
30.1 Kohm
R41
3
4
EXT CLK
5
6
R54
1
2
3
PHASMD
SEL
1V2
1V5
J40
J41
J42
1
1
1
1
2
3
DIFFN
120
R34
60
R40
jumper on pins 3-4
external
connect external clock to pins 5-6
DIFFP
VOUTS1 (1)
C35
0402 DNP
0603R35
150 kohm
2
2
2
1
1
2
J43
0603 R36
0603R37
0603 R38
90.9 kohms
60.4 kohm
30.1kohm
2
0603R39
10 kohm
VOUTS2 (1)
VOUT1- (1)
A
1060 Rincon Circle
VOUT2- (1)
San Jose, CA 95131
0 Ohm
VOUT1+ (1,2)
Title
DNP
3
B
2
Draw
MxL7218 EVK Schematic
Size
VOUT2+ (1,2)
Date:
4
1
1V8
DNP
0603
J45
R55
0603
R52
0603
1 kohm
jumper on pins 1-2
1V0
J39
0 Ohm
0603
INTVCC
MODEPLL
0V9
J38
2
R48
0402 DNP
DNP
0603
2
FCM
A
0 Ohm
0603
R42
R53
0603 J44
1 kohm
PSM
1
0V8
DIFFOUT
INTVCC
5
TRACK1 EXT
R20
30.1 Kohm
2
PSM
FCM
FCM
-
0603R18
DNP
0402
0V8
2
3
R61
R24
0603 DNP 0603 10K
C36 (CFF1)
0402 100pF
D7
(3) VFB2
0V9
1
INTVCC VIN
CFF2
MODEPLL
J36
B
1V0
MXL7218
RUN1 (3)
F5
1
VOUT1+ (1,2)
D1
1V2
RUN1
(1,3)
J26
TRACK1 (3)
E5
(1,2) VOUT2+
1
2
3
RUN2
1V5
TRACK1
C37
0402
100pF
OFF
1V8
TRACK2
VOUT2
DNP
TRACK1 SEL
E6
0402
2
3
D8
(3)RUN2
COMP1
0603
1
(3) TRACK2
2
PGOOD1
G9
(3)
R17
TRACK1
- SOFT-START - jumper on pins 5-6
- from external - jumper on pins 3-4
- from VOUT2 - jumper on pins 1-2
G2
DIFFP
DIFFN
DIFFOUT
C
1
R19
0603
J27
SW1
COMP2
MODE_PLLIN
TRACK2 EXT
COMP1
PGOOD2
E7
PHASMD
R15 0603
DNP
G11
FSET
TRACK1
- SOFT-START - jumper on pins 5-6
- from external - jumper on pins 3-4
- from VOUT1 - jumper on pins 1-2
DNP
G4
VOUT1
D
2
PGOOD1 (3)
PHASEMD
0603
(1,3)
C6
U1-4
2
1
(3) COMP2
CLKOUT
0603
121 kOhms
C28
0402 DNP
PGOOD1
G5
R16
PGOOD2
J24
1
CLKOUT
(3)
R11
0402 DNP
R13
0603 10 kohm
1
2
R14
C26
DNP 0402
J22
TP3
E8
E9
F8
J23
SW1
1
R12
0603 10 kohm
FSET
C27
DNP 0402
D
COMP1
INTVCC
CLKOUT
0603
SW2
PGOOD2
1
SW1
TP1
0603
INTVCC
R10
DNP 0402
2
1
COMP2
3
TP2
1
SW2
TP
4
TP
5
FCostescu
Document Number
Rev
710-MxL7225-EVK-100-A
Wednesday, September 02, 2020
Sheet
A
2
of
4
1
Figure 19: EVB Schematic, Continued
10/5/20
020UMR02
17
MxL7218 18A Dual Phase EVB User Manual
MxL7218EVB Schematic
5
A6
A7
B6
B7
D1
D2
D3
D4
D9
D10
D11
D12
E1
E2
E3
E4
E10
E11
E12
F1
F2
F3
F10
F11
F12
G1
G3
D
4
U1-2
MXL7218
PGND_1
PGND_2
PGND_3
PGND_4
PGND_5
PGND_6
PGND_7
PGND_8
PGND_9
PGND_10
PGND_11
PGND_12
PGND_13
PGND_14
PGND_15
PGND_16
PGND_17
PGND_18
PGND_19
PGND_20
PGND_21
PGND_22
PGND_23
PGND_24
PGND_25
PGND_26
PGND_27
PGND_28
PGND_29
PGND_30
PGND_31
PGND_32
PGND_33
PGND_34
PGND_35
PGND_36
PGND_37
PGND_38
PGND_39
PGND_40
PGND_41
PGND_42
PGND_43
PGND_44
PGND_45
PGND_46
PGND_47
PGND_48
PGND_49
PGND_50
PGND_51
PGND_52
PGND_53
PGND_54
3
U1-3
MXL7218
G10
G12
H1
H2
H3
H4
H5
H6
H7
H9
H10
H11
H12
J1
J5
J8
J12
K1
K5
K6
K7
K8
K12
L1
L12
M1
M12
SGND2
SGND1
SGND3
SGND4
SGND5
SGND6
J46
C7
D6
F6
F7
G6
G7
J47
J48
J49
J50
NS1
J51
DNP
2
1
1
1
1
D
1
1
1
C
C
OPTIONAL JUMPERS FOR SINGLE
OUTPUT CONFIGURATION
LOAD TRANSIENT CIRCUIT
(2)
0402
R43
RUN1
RUN2
(2)
DNP
R56
R57
0 Ohm
DNP
(1,2) VOUT1
VOUT2 (1,2)
B
(2)
0402
R44
COMP1
COMP2 (2)
J60
DNP
1
0603C38
1uF
0603C39
1uF J61
1
B
3
0402
R45
(2)
TRACK1
TRACK2 (2)
Q1
SUD50N04
1
C40 0603 C41 0603
1uF
1uF
DNP
2
IOSTEP_CLK
1
IOSTEP
0402
R46
(2)
VFB1
2
VFB2 (2)
2512
DNP
R58
2512
0.01 ohm
1
J58
2
J59
0603
R60
10 Kohm
R59
DNP
0402
R47
(2)
PGOOD1
PGOOD2 (2)
DNP
A
A
1060 Rincon Circle
San Jose, CA 95131
Title
B
Date:
5
4
3
2
Draw
MxL7218 EVK Schematic
Size
FCostescu
Document Number
Rev
710-MxL7225-EVK-100-A
Tuesday, April 07, 2020
Sheet
A
3
of
4
1
Figure 20: EVB Schematic, Continued
10/5/20
020UMR02
18
MxL7218 18A Dual Phase EVB User Manual
MxL7218EVB PCB Layers
MxL7218EVB PCB Layers
10/5/20
Figure 21: EVB PCB BGA Silkscreen Top
Figure 22: EVB PCB BGA Layer 1
Figure 23: EVB PCB BGA Layer 2
Figure 24: EVB PCB BGA Layer 3
020UMR02
19
MxL7218 18A Dual Phase EVB User Manual
MxL7218EVB PCB Layers
Figure 26: EVB PCB BGA Layer 5
Figure 25: EVB PCB BGA Layer 4
Figure 27: EVB PCB BGA Layer 6
10/5/20
Figure 28: EVB PCB BGA Silkscreen Bottom
020UMR02
20
MxL7218 18A Dual Phase EVB User Manual
MxL7218EVB Bill of Materials
MxL7218EVB Bill of Materials
Table 9: EVB BGA Bill of Materials
Item Qty
Reference
Designator
Value
Tol. Description
1
1
C1
4.7µF
10%
2
4
C2, C3, C16,
C17
470µF
3
2
C8, C22
100µF
4
4
C9, C10, C23,
C24
DNP
CAP TANT POLY DNP
5
8
C4, C5, C6,
C7, C18, C19,
C20, C21,
DNP
CAP CER DNP
6
4
C11, C12,
C14, C15
22µF
10%
CAP CER 22uF 10% 25V
X5R 1210
Wurth Elektroics
885012109014
1210
7
1
C13
150µF
20%
CAP ALUM, 150UF, 25V,
20%
Nichicon
UCD1E151MNL1GS
SMD
8
6
C25, C26,
C27, C28,
C34, C35
DNP
9
2
C29, C30
10nF
10
2
C31, C32
DNP
11
5
C33, C38,
1µF
C39, C40, C41
10%
CAP CER 1uF +/-10% 16V
X7R 0603
Wurth Elektroics
885012206052
0603
12
2
C36, C37
100pF
5%
CAP, CER, 47pF, 25V, 0402
Wurth Elektroics
885012005044
0402
13
2
D1, D2
DNP
DIODE ZENER 3.3V
500MW SOD123
ON Semiconductor
MMSZ5226B
SMD
14
21
J1, J2, J22,
J23, J24, J27,
J28, J31, J32,
J33, J34, J35,
J36, J38, J39,
J40, J41, J42,
J43, J58, J59
HEADER_1X2_2.54 mm_M
HDR,2.54mm Single Row/
Male 1X2 GOLD
Wurth Elektroics
61300211121
TH
15
4
J3,J29,J30,
J45
HEADER_1X3_2.54 mm_M
HDR,2.54mm Single Row/
Male 1X3 GOLD
Wurth Elektroics
61300311121
TH
16
18
J4, J7, J10,
J12, J15, J18,
J46, J47, J48,
J49, J50, J51,
J52, J53, J54,
J55, J60, J61
HEADER_1X1_2.54 mm_M
HDR,Single Pin/Male 1X1
GOLD
Wurth Elektroics
61300111121
TH
17
4
J6, J8, J16,
J17
KFH
Broaching Stud , KFH
#10-32, Phosphor Bronze
Penn Engineering
KFH-032-10ET
TH
10/5/20
Manufacturer /
Part Number
Package
Size
CAP CER 4.7UF 16V 10%
X7R 0805
Wurth Elektroics
885012207053
0805
20%
CAP TANT POLY 470UF,
2.5V, 5mΩ
Panasonic
ETPF470M5H
4.3mm x
7.3mm
10%
CAP CER 100uF 6.3V 20%
X5R 1210
Wurth Elektroics
885012109004
1210
4.3mm x
7.3mm
CAP, Ceramic, SMD, DNP,
0402
10%
CAP CER, 0.01UF, 50V,
10%, X7R, 0603
0402
Wurth Elektroics
885382206002
CAP, Ceramic, SMD, DNP,
0603
020UMR02
0603
0603
21
MxL7218 18A Dual Phase EVB User Manual
MxL7218EVB Bill of Materials
Table 9: EVB BGA Bill of Materials (Continued)
Item Qty
Reference
Designator
18
2
J9, J11
19
3
J25, J26, J44
20
1
21
Value
Tol. Description
Manufacturer /
Part Number
Package
Size
CONN. BANANA JACK
Keystone Electronics
575-4
HEADER_2X3_0.1"
HDR, 0.1" Double Row/2x3
Wurth Elektroics
61300621121
TH
Q1
SUD50N04
MOSFET N-CH 40V 14A
TO-252
Vishay
SUD50N04
SMD
1
R1
44.2kΩ
1%
RES SMD 44.2 KOHM 1%
1/10W 0603
KOA Speer
RK73H1JTTD4422F
0603
22
4
R2, R3, R8, R9 10Ω
1%
RES, Thin Film, 10 ohm,
1%, 1/10W, SMD, 0603
Vishay
CRCW060310R0FKEB
0603
23
4
R7, R34, R41,
R54
0Ω
1%
RES, Thick Film, 0 ohm, 1%, Yageo
1/10W, 50V, SMD, 0603
RC0603FR-070RL
24
4
R6, R50, R51,
R59
DNP
25
9
R10, R11,
R43, R44,
DNP
R45, R46,
R47, R48, R49
26
5
R12, R13,
10kΩ
R23, R24, R60
27
4
R14, R15,
R17, R18
DNP
28
1
R16
29
6
R19, R20,
R21, R22,
R31, R37
30
6
R4, R40, R42,
DNP
R55, R61, R62
RES, DNP, SMD, 0603
31
2
R25, R26
3.32kΩ
RES SMD, 3.32K OHM, 1%
1/10W 0603
32
2
R27, R28
30.1kΩ
33
2
R29, R35
34
2
35
0603
2512
RES, DNP, SMD, 0402
0402
1%
RES SMD 10K OHM 1%
1/10W 0603
Panasonic
ERJ-3EKF1002V
0603
121kΩ
1%
RES SMD 110K OHM 1%
1/10W 0603
Yageo
RC0603FR-07110KL
0603
60.4kΩ
1%
RES SMD 60.4K OHM 1%
1/10W 0603
Panasonic
ERJ-3EKF6042V
0603
0603
Stackpole Electronics
RMCF0603FT3K32
0603
1%
RES 30.1K OHM 1/16W 1% Yageo
0402 SMD
RC0402FR-0730K1L
0402
150kΩ
1%
RES, Thin Film, 150 Kohm,
1%, 1/10W, SMD, 0603
Vishay
CRCW0603150KFKEA
0603
R30, R36
90.9kΩ
1%
RES SMD 90.9K OHM 1%
1/10W 0603
Panasonic
ERJ-3EKF9092V
0603
2
R32, R38
30.1kΩ
1%
RES SMD 30.1K OHM 1%
1/10W 0603
Yageo
RC0603FR-0730K1L
0603
36
2
R33, R39
10kΩ
1%
RES SMD 10K OHM 1%
1/10W 0603
Yageo
RC0603FR-0710KL
0603
37
2
R52, R53
1kΩ
1%
RES SMD 1K OHM 1%
1/10W 0603
Panasonic
ERJ3EKF1001V
0603
38
1
R56
0Ω
Resistor 0 Ohm Jumper
1W,SMD
Vishay
CRCW20100000Z0EFHP
2010
39
1
R57
DNP
DNP for CAP 2010
Vishay
CRCW20100000Z0EFHP
2010
10/5/20
020UMR02
22
MxL7218 18A Dual Phase EVB User Manual
MxL7218EVB Bill of Materials
Table 9: EVB BGA Bill of Materials (Continued)
Item Qty
Reference
Designator
Value
Tol. Description
40
1
R58
0.01Ω
1%
41
1
R59
DNP
42
1
U1
MXL7218_BGA
10/5/20
Resistor 0.01Ohm, 2W,1%,
SMD
Manufacturer /
Part Number
Package
Size
Rohm
PMR100HZPFU10L0
2512
2512
MXL IC MXL7218 144P
16X16X5.21-BGA
020UMR02
MaxLinear
MXL7218-ABA-T
BGA
23
MxL7218 18A Dual Phase EVB User Manual
Disclaimer
MaxLinear, Inc.
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www.maxlinear.com
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