MxL7225-1
25A Dual Phase
EVB User Manual
MaxLinear Confidential
TBD/18
• www.maxlinear.com
024UMR00• 024UMR00
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MxL7225-1 25A Dual Phase EVB User Manual
Revision History
Revision History
Document No.
Release Date
Change Description
024UMR00
10/21/20
Initial release.
10/21/20
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MxL7225-1 25A 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
MxL7225-1 EVB Mode Selection ................................................................................................................................10
Performance...................................................................................................................................................... 12
Efficiency ..................................................................................................................................................................... 12
Load Transient Response ........................................................................................................................................... 13
Output Ripple .............................................................................................................................................................. 14
Thermal ....................................................................................................................................................................... 15
MxL7225-1EVB Schematic ............................................................................................................................... 16
MxL7225-1EVB PCB Layers............................................................................................................................. 19
MxL7225-1EVB 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 MxL7225-1 25A Dual Phase BGA EVB...............................................................................................3
Figure 3: Block Diagram MxL7225-1 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: Load Transient Response (VOUT = 1.5V, VIN = 12V) ..........................................................................................13
Figure 14: Load Transient Response (VOUT = 1.0V, VIN = 12V) ..........................................................................................13
Figure 15: Channel 1 Output Voltage Ripple (VIN = 12V, VOUT = 1.5V, Load = 25A) ..........................................................14
Figure 16: Channel 2 Output Voltage Ripple (VIN = 12V, VOUT = 1.0V, Load = 25A) ..........................................................14
Figure 17: Thermal Capture (VIN = 12V, VOUT1 = 1.5V at 25A and VOUT2 = 1V at 25A, 500kHz, Airflow = 200LFM) .........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: JP45 Options ............................................................................................................................................................8
Table 8: Board Stuffing for Operation Mode Selection .........................................................................................................10
Table 9: EVB BGA Bill of Materials ...................................................................................................................................... 21
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Introduction
Introduction
The MxL7225-1 evaluation board provides a platform to evaluate the features and performance of the MxL7225-1. The
MxL7225-1 is a dual 25A Power Module optimized for powering Telecom, Networking and Industrial equipment. There are
multiple EVBs for the MxL7225. This manual covers the Evaluation Board for the MxL7225-1 25A Dual Phase Module with
external compensation.
Quick EVB Set Up and Start Up
Factory Settings
In addition to utilizing the 4.5V to 15V input voltage range and dual 25A maximum load current rating capabilities of the
MxL7225-1 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 MxL7225-1 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 (25A ), 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 (25A ), 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 be measured
across the output capacitors for each channel: C8 for
VOUT1 and C22 for VOUT2. Test points J52 and J53
can be used to monitor VOUT1 and VOUT2,
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 50A Operation and to vary VOUT see
MxL7225-1 EVB Mode Selection.
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MxL7225-1 25A 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 MxL7225-1 25A Dual Phase BGA EVB
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MxL7225-1 25A Dual Phase EVB User Manual
Reference Documentation
Reference Documentation
Please refer to the MxL7225-1 Data Sheet for additional information about the MxL7225-1, 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 MxL7225-1 product page.
Ordering Information
Table 1: Evaluation Board Ordering Part Number
Power Module
Evaluation Board
Description
MxL7225-1-ABA-T
MxL7225-1-EVK-1
MxL7225-1 BGA Power Module Dual-Phase EVB
1. Refer to www.maxlinear.com/MxL7225 for most up-to-date Ordering Information.
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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
(J22)
PHASEMD
SELECT
JUMPER
J6
VOUT1
VIN
MxL7225-1
VOUT2
CONNECTOR
J16
VOUT2
PHASEMD
OUTPUT
CONFIG
OPTION
VOUT1
CONNECTOR
J6
TRANSIENT LOAD
CIRCUIT
VOUT1
VOUT2
DIFF
SENSE
OPTION
VOUT2
CONNECTOR
J16
IOSTEP
CONNECTOR
J58
Figure 3: Block Diagram MxL7225-1 Two Channel EVB
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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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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
PHASEMD
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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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: JP45 Options
Jumper Options
Description
Jumper 1-2
120°
No Jumper
90°
Jumper 2-3
60°
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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 12.5A 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 12.5mA load will occur when a 125mV pulse is observed at J59.
To test load transient response on CH2, depopulate R56 and populate R57 and repeat procedure.
LOAD TRANSIENT CIRCUIT
R56
R57
DNP
DNP
(1,2) VOUT1
VOUT2 (1,2)
0603 C38
1uF
J60
0603 C39
1uF J61
1
1
3
Q1
SUD50N04
1
C40 0603 C41 0603
1uF
1uF
2
1
2
J59
1
IOSTEP
2
2512
J58
IOSTEP_CLK
R58
0.01 ohm
2512
0603
R60
10 Kohm
R59
DNP
Figure 4: Load Transient Circuit
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MxL7225-1 EVB Mode Selection
MxL7225-1 EVB Mode Selection
The MxL7225-1 EVB can be configured for 6 different modes of operation:
■
■
■
■
■
■
Mode 1: Dual 25A with no remote sense amplifier
Mode 2: Dual 25A with remote sense amplifier on VOUT1
Mode 3: Dual 25A with remote sense amplifier on VOUT2
Mode 4: Single 50A with no remote sense amplifier
Mode 5: Single 50A with remote sense amplifier on VOUT1
Mode 6: Single 50A 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
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
Pin
Function
Component
Mode 1
Dual Rail
Single Phase
Diff Amp
NC
2-Phase
(VOUT1)
R5
DNP
DNP
DNP
0Ω
0Ω
0Ω
2-Phase
(VOUT2)
R6
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
J15 (5-6)
On
On
On
On
On
On
TRACK2
J32 (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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MxL7225-1 EVB Mode Selection
MODE2
Dual Rail Single Phase
Diff Amp -> VOUT1
MODE1
Dual Rail Single Phase
Diff Amp -> NC
VOUT1+
VOUT1+
R2
VOUT1
VOUTS1
R4
R41
VOUT1-
R3
DIFFP
DIFFN
DIFFO UT
R2
VOUT1
VOUTS1
DIFFP
DIFFN
DIFFO UT
R34
R54
VOUT2+
VOUT2+
R8
VOUT2
VOUT1-
R3
R8
VOUT2
VOUTS2
VOUTS2
R7
R7
VOUT2-
VOUT2-
R9
R9
Figure 6: Mode 2 Block Diagram
Figure 5: Mode 1 Block Diagram
MODE4
Single Rail Dual Phase
Diff Amp -> NC
MODE3
Dual Rail Single Phase
Diff Amp -> VOUT2
VOUT1
VOUTS1
DIFFP
DIFFN
DIFFO UT
VOUT1+
VOUT1+
R2
R2
VOUT1
VOUTS1
R4
R4
VOUT1-
R3
R40
VOUT1-
R3
DIFFP
DIFFN
DIFFO UT
R55
R5
VOUT_50A
R6
VOUT2+
VOUT2+
R8
VOUT2
R8
VOUT2
VOUTS2
VOUTS2
R42
VOUT2-
VOUT2-
R9
R9
Figure 8: Mode 4 Block Diagram
Figure 7: Mode 3 Block Diagram
MODE6
Single Rail Dual
Diff Amp -> VOUT
MODE5
Single Rail Dual Phase
Diff Amp -> VOUT1
VOUT1+
VOUT1
VOUTS1
DIFFP
DIFFN
DIFFO UT
VOUT1+
R2
R5
R41
VOUT1-
R3
VOUT_50A
R34
R54
R2
VOUT1
VOUTS1
R6
DIFFP
DIFFN
DIFFO UT
R5
VOUT1-
R3
VOUT_50A
R40
R55
R6
VOUT2+
VOUT2
VOUT2+
R8
VOUT2
VOUTS2
R8
VOUTS2
R42
VOUT2-
VOUT2-
R9
R9
Figure 10: Mode 6 Block Diagram
Figure 9: Mode 5 Block Diagram
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Performance
Performance
Efficiency
95
Efficiency (%)
90
85
80
75
5VIN, 1.5VOUT
70
65
12VIN, 1.5VOUT
0
5
10
15
20
25
Load Current (A)
Figure 11: Channel 1 Measured Efficiency (VOUT = 1.5V, fSW = 500kHz, Ch 2 Disabled)
95
Efficiency (%)
90
85
80
75
5VIN, 1.0VOUT
70
65
12VIN, 1.0VOUT
0
5
10
15
20
25
Load Current (A)
Figure 12: Channel 2 Measured Efficiency (VOUT = 1.0V, fSW = 500kHz, Ch 1 Disabled)
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Load Transient Response
Load Transient Response
1.5V Output (20mV/Div, 20MHz BW)
12.5A to 18.75A Step
Figure 13: Load Transient Response (VOUT = 1.5V, VIN = 12V)
1V Output (20mV/Div, 20MHz BW)
12.5A to 18.75A Step
Figure 14: Load Transient Response (VOUT = 1.0V, VIN = 12V)
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Output Ripple
Output Ripple
1.5V Output (20mV/Div, 20MHz BW)
2. Ripple waveform shown, measured at VOUT1 (J54). The ripple waveform characteristics ideally should be observed at the output capacitor closest to
the MxL7225-1, C8.
Figure 15: Channel 1 Output Voltage Ripple (VIN = 12V, VOUT = 1.5V, Load = 25A)
1V Output (20mV/Div, 20MHz BW)
3. Ripple waveform shown, measured at VOUT2 (J55). The ripple waveform characteristics ideally should be observed at the output capacitor closest to
the MxL7225-1, C22.
Figure 16: Channel 2 Output Voltage Ripple (VIN = 12V, VOUT = 1.0V, Load = 25A)
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Thermal
Thermal
Figure 17: Thermal Capture (VIN = 12V, VOUT1 = 1.5V at 25A and VOUT2 = 1V at 25A, 500kHz, Airflow = 200LFM)
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MxL7225-1EVB Schematic
MxL7225-1EVB Schematic
4
3
EXTVCC
EXTVCC
INTVCC
J2
1
1
2
2
TEMP_PWR
INTVCC
C1
C33
0805 4.7uF 0603 1uF
TEMP
D
1
J3
VIN
VOUT1+ (2)
1
2
3
INTVCC
J1
2
J4
1
2
3
5
0603
R1
44.2 kOhms
VOUT1
(2,3)
Cout bulk:
- 2 @ 470 uF, 2.5 V, 3 mohm
- 2 optional
Cout ceramic:
- 5 @ 100 uF, 6.3 V, X5R, 1210
R2
0603 10 ohm
D
J52
1
J9
VIN
1
Jack_575-4
J11
GND
C
ceramic:
4 @ 22uF, 25 V, X5R, 1210
bulk:
1 @ 330 uF, 25 V, 14 mohm
VIN
C13
C11
T
1210
330uF
22uF
1
Jack_575-4
VIN-
VIN
J12
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
J6
J7
J6
C2
T
470uF
TEMP
Cin
Cin
-
EXTVCC
1
INTVCC
VIN+
J7
H8
TEMP
U1-1
MXL7225-1
C3
C4
C5
C6
C7
C8
T
1210
1210
1210
1210
1210
470uF
100uF
100uF
100uF
100uF
100uF
C9
T
DNP
C10
T
DNP
J8
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
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
GND
1575
1
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
VOUT1
1575
J54
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
VOUT1+
1
R3
0603 10 ohm
J10
VOUT1-
VOUT1- 1
VOUT1- (2)
C
R4
0603 DNP
VOUT1
C5
VOUTS1 (2)
C8
VOUTS2 (2)
C12
C11
C10
C9
B12
B11
B10
B9
B8
A12
A11
A10
A9
A8
2512
R51
DNP
2512
R6
2512
DNP
R50
DNP
R7
0603 0 ohm
VOUT2+ (2)
J15
1
J55
VOUT2+
1
R8
0603 10 ohm
Cout bulk:
- 2 @ 470 uF, 2.5 V, 3 mohm
- 2 optional
Cout ceramic:
- 5 @ 100 uF, 6.3 V, X5R, 1210
B
J53
1
J16
VOUT2
C16
T
470uF
C17
C18
C19
C20
C21
C22
T
1210
1210
1210
1210
1210
470uF
100uF
100uF
100uF
100uF
100uF
C23
T
DNP
C24
T
DNP
VOUT2
1575
J17
GND
1575
VOUT2
R9
0603 10 ohm
(2,3)
J18
VOUT2- 1
VOUT2-
VOUT2- (2)
A
A
1060 Rincon Circle
San Jose, CA 95131
Title
B
Date:
5
4
3
2
Draw
MxL7225 EVK Schematic
Size
FCostescu
Document Number
Rev
A
710-MxL7225-EVK-100-A
Wednesday, September 30, 2020
Sheet
1
of
4
1
Figure 18: EVB Schematic
10/21/20
024UMR00
16
MxL7225-1 25A Dual Phase EVB User Manual
MxL7225-1EVB Schematic
1
FSET
TP
C25
0402 220pF
TRACK1
- SOFT-START - jumper on pins 5-6
- from external - jumper on pins 3-4
- from VOUT1 - jumper on pins 1-2
G8
TRACK2 SEL
E7
J25
4
VIN
R21 0603
60.4 kohm
6
0603 C29
0.1 uF
R23
10 kohm 0603
R62
0603 DNP
J36
B
J35
1V0
J34
2
4
5
6
CLKOUT
INTVCC VIN
J28
1
C
2
60.4 kohm
C30 0603
0.1 uF
R61
R24
0603 DNP 0603 10 kohm
C36 (CFF1)
0402 33pF
D7
R27
0V8
J32
C31
0603 DNP
VFB2
MODE_PLLIN
DNP
R25
3.57K
0603
J31
1
1
1
1
1
1
2
2
2
2
2
2
0603R22
60.4 kohm
VFB1
1
2
3
VFB1 (3)
C32
DNP0603
R26
3.57K
0603
1
2
3
ON
OFF
DNP RUN1
B
DIFF AMP
R49
0402 DNP
R28
30.1 Kohm
R41
3
4
EXT CLK
5
6
R54
PHASMD
SEL
jumper on pins 1-2
1V0
1V2
1V5
J39
J40
J41
J42
1
2
3
DIFFN
120
R34
60
R40
jumper on pins 3-4
external
connect external clock to pins 5-6
J43
1
1
1
1
1
1
2
2
2
2
2
2
DIFFP
VOUTS1 (1)
C35
0402 DNP
0603R35
150 kohm
0603 R36
0603R37
0603 R38
90.9 kohms
60.4 kohm
30.1kohm
0603R39
10 kohm
VOUTS2 (1)
VOUT1- (1)
A
1060 Rincon Circle
VOUT2- (1)
San Jose, CA 95131
0 Ohm
VOUT1+ (1,2)
Title
DNP
VOUT2+ (1,2)
3
B
2
Draw
MxL7225 EVK Schematic
Size
Date:
4
1V8
DNP
0603
J45
1
2
3
R55
0603
R52
0603
1 kohm
MODEPLL
0V9
J38
0 Ohm
0603
INTVCC
R48
0402 DNP
DNP
0603
2
FCM
A
0 Ohm
0603
R42
R53
0603 J44
1 kohm
PSM
1
0V8
DIFFOUT
INTVCC
PSM
FCM
FCM
-
D5
30.1 Kohm
C34
0603 R33
0603R32
0603 R31
0603 R30
0603 R29
DNP 0402
10 kohm
30.1kohm
60.4 kohm
90.9 kohms
150 kohm
5
TRACK1 EXT
J30
0V9
J33
2
3
R20
RUN1 (3)
F5
CFF2
F4
1V2
0603R18
6.04 kohm
0402
RUN2
1V5
RUN1
1
VOUT1+ (1,2)
(3) VFB2
OFF
1V8
RUN2
(1,3)
J26
TRACK1 (3)
E5
C37
DNP0402
1
2
3
1
2
3
TRACK1
VOUT2
6.04 kohm
TRACK1 SEL
E6
(1,2) VOUT2+
J29
ON
TRACK2
G9
0402
5
60.4 kohm
F9
INTVCC
COMP1
0603
3
D8
(3) RUN2
PGOOD1
COMP2
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
2
(3) TRACK2
2
SW1
(3)
R17
E8
E9
F8
1
C
1
R19
0603
J27
COMP1
PGOOD2
MODEPLL
TRACK2 EXT
SW2
PHASMD
R15 0603
6.04 kohm
G11
G4
6.04 kohm
D
2
PGOOD1 (3)
PHASEMD
0603
VOUT1
FSET
U1-4
MXL7225-1
C28
0402 2200 pF
PGOOD1
G5
(3) COMP2
J24
1
CLKOUT
0603
121 kOhms
FSET
R16
PGOOD2
C6
(3)
R11
0402 16.2 kohm
R13
0603 10 kohm
1
2
(1,3)
C26
150 pF 0402
J22
TP3
J23
R14
SW1
1
R12
0603 10 kohm
1
C27
3300pF 0402
D
COMP1
INTVCC
CLKOUT
0603
SW2
PGOOD2
1
SW1
TP1
0603
INTVCC
R10
11.5 kohm0402
2
TP2
1
SW2
COMP2
3
TP
4
TP
5
FCostescu
Document Number
Rev
A
710-MxL7225-EVK-100-A
Wednesday, September 30, 2020
Sheet
2
of
4
1
Figure 19: EVB Schematic, Continued
10/21/20
024UMR00
17
MxL7225-1 25A Dual Phase EVB User Manual
MxL7225-1EVB Schematic
5
4
U1-2
MXL7225-1
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
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
3
U1-3
MXL7225-1
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
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
2
1
J46
1
C7
D6
F6
F7
G6
G7
J47
1
J48
1
D
J49
1
J50
1
NS1
J51
1
DNP
C
C
OPTIONAL JUMPERS FOR SINGLE
OUTPUT CONFIGURATION
LOAD TRANSIENT CIRCUIT
0402
R43
(2)
RUN1
RUN2
(2)
DNP
R56
R57
DNP
DNP
(1,2) VOUT1
VOUT2 (1,2)
(2)
0402
R44
B
COMP1
COMP2 (2)
0603C38
1uF
J60
0603C39
1uF J61
1
1
DNP
B
3
0402
R45
(2)
TRACK1
TRACK2 (2)
Q1
SUD50N04
1
C40 0603 C41 0603
1uF
1uF
DNP
2
0402
VFB1
2
VFB2 (2)
2512
DNP
1
2
J59
1
IOSTEP
R46
(2)
J58
IOSTEP_CLK
R58
2512
0.01 ohm
0603
R60
10 Kohm
R59
DNP
(2)
0402
R47
PGOOD1
PGOOD2 (2)
DNP
A
A
1060 Rincon Circle
San Jose, CA 95131
Title
B
Date:
5
4
3
2
Draw
MxL7225 EVK Schematic
Size
FCostescu
Document Number
Rev
A
710-MxL7225-EVK-100-A
Wednesday, September 30, 2020
Sheet
3
of
4
1
Figure 20: EVB Schematic, Continued
10/21/20
024UMR00
18
MxL7225-1 25A Dual Phase EVB User Manual
MxL7225-1EVB PCB Layers
MxL7225-1EVB PCB Layers
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
10/21/20
024UMR00
19
MxL7225-1 25A Dual Phase EVB User Manual
MxL7225-1EVB PCB Layers
Figure 26: EVB PCB BGA Layer 5
Figure 25: EVB PCB BGA Layer 4
Figure 27: EVB PCB BGA Layer 6
10/21/20
Figure 28: EVB PCB BGA Silkscreen Bottom
024UMR00
20
MxL7225-1 25A Dual Phase EVB User Manual
MxL7225-1EVB Bill of Materials
MxL7225-1EVB Bill of Materials
Table 9: EVB BGA Bill of Materials
Item Qty
Reference
Designator
Value
Tol.
Description
Manufacturer /
Part Number
Package
Type
1
1
C1
4.7µF
10%
CAP CER 4.7UF 16V 10%
X7R 0805
Wurth Elektronics
885012207053
0805
2
4
C2, C3, C16,
C17
470µF
20%
CAP TANT POLY 470UF,
2.5V, 5mΩ
Panasonic
ETPF470M5H
4.3x7.3mm
3
10
C4, C5, C6,
C7, C8, C18,
C19, C20,
C21, C22
100µF
10%
CAP CER 100uF 6.3V 20% Wurth Elektronics
X5R 1210
885012109004
1210
4
4
C9, C10,
C23, C24
DNP
CAP TANT POLY DNP
4.3x7.3mm
5
4
C11, C12,
C14, C15
22µF
10%
CAP CER 22uF 10% 25V
X5R 1210
Wurth Elektronics
885012109014
1210
6
1
C13
330µF
20%
CAP., ALUM. ELECT.,
330μF, 25V, 20%
Panasonic
25SVPF330M
SMD
7
1
C25
220pF
CAP, Ceramic, 220pF 10%
X7R, 0402
Wurth Elektronics
0402
8
1
C26
150pF
CAP, Ceramic, 150pF 10%
X7R, 0402
Wurth Elektronics
0402
9
1
C27
3300pF
CAP, Ceramic, 3300pF
10% X7R, 0402
Wurth Elektronics
0402
10
1
C28
2200pF
CAP, Ceramic, 2200pF
10% X7R, 0402
Wurth Elektronics
0402
11
2
C34, C35
DNP
CAP, Ceramic, SMD, DNP,
0402
12
2
C29, C30
10nF
13
2
C31, C32
DNP
14
5
C33, C38,
C39, C40,
C41
1µF
15
1
C36
33pF
16
1
C37
DNP
17
2
D1, D2
DNP
18
21
J1, J2, J22,
J23, J24, J27,
J28, J31, J32,
J33, J34, J35, HEADER_1X2_2.54 mm_M
J36, J38, J39,
J40, J41, J42,
J43, J58, J59
19
4
J3, J29, J30,
J45
10/21/20
HEADER_1X3_2.54 mm_M
10%
CAP CER, 0.01UF, 50V,
10%, X7R, 0603
0402
Wurth Elektronics
885382206002
0603
CAP, Ceramic, SMD, DNP,
0603
0603
10%
CAP CER 1uF +/-10% 16V Wurth Elektronics
X7R 0603
885012206052
0603
10%
CAP, Ceramic, 330pF 10%
X7R, 0402
0402
Wurth Elektronics
0402
HDR,2.54mm Single Row/
Male 1X2 GOLD
Wurth Elektronics
61300211121
TH
HDR,2.54mm Single Row/
Male 1X3 GOLD
Wurth Elektronics
61300311121
TH
024UMR00
21
MxL7225-1 25A Dual Phase EVB User Manual
MxL7225-1EVB Bill of Materials
Table 9: EVB BGA Bill of Materials (Continued)
Item Qty
Reference
Designator
Description
Manufacturer /
Part Number
Package
Type
18
J4, J7, J10,
J12, J15, J18,
J46, J47, J48,
HEADER_1X1_2.54 mm_M
J49, J50, J51,
J52, J53, J54,
J55, J60, J61
20
HDR, Single Pin/Male 1X1
GOLD
Wurth Elektronics
61300111121
TH
21
4
J6, J8, J16,
J17
Broaching Stud , KFH #10- PennEngineering
32, Phosphor Bronze
KFH-032-10ET
TH
22
2
J9, J11
CONN. BANANA JACK
Keystone Electronics
575-4
23
3
J25, J26, J44 HEADER_2x3_0.1"
HDR, 0.1" Double Row/2x3
Wurth Elektronics
61300621121
TH
24
1
Q1
SUD50N04
MOSFET N-CH 40V 14A
TO-252
Vishay
SUD50N04
SMD
25
1
R1
44.2kΩ
1%
RES SMD 44.2 KOHM 1%
1/10W 0603
KOA Speer
RK73H1JTTD4422F
0603
26
4
R2, R3, R8,
R9
10Ω
1%
RES, Thin Film, 10 ohm,
1%, 1/10W, SMD, 0603
Vishay
CRCW060310R0FKEB
0603
27
4
R7, R34,
R41, R54
0Ω
1%
RES, Thick Film, 0 ohm,
1%, 1/10W, 50V, SMD,
0603
Yageo
RC0603FR-070RL
0603
28
4
R6, R50,
R51, R59
DNP
29
1
R10
11.5kΩ
RES SMD 11.5K OHM 1%
1/10W 0402
0402
30
1
R11
16.2kΩ
RES SMD 16.2K OHM 1%
1/10W 0402
0402
31
7
R43, R44,
R45, R46,
R47, R48,
R49
DNP
32
5
R12, R13,
R23, R24,
R60
10kΩ
33
2
R17, R18
6.04kΩ
34
2
R14, R15
DNP
35
1
R16
121kΩ
1%
RES SMD 121K OHM 1%
1/10W 0603
Yageo
RC0603FR-07121KL
0603
36
6
R19, R20,
R21, R22,
R31, R37
60.4kΩ
1%
RES SMD 60.4K OHM 1%
1/10W 0603
Panasonic
ERJ-3EKF6042V
0603
37
6
R4, R40,
R42, R55,
R61, R62
DNP
38
2
R25, R26
3.57kΩ
10/21/20
Value
Tol.
KFH
2512
0402
1%
RES SMD 10K OHM 1%
1/10W 0603
Panasonic
ERJ-3EKF1002V
0603
RES SMD 6.04K OHM 1%
1/10W 0603
0603
0603
1%
RES SMD 3.57K OHM 1%
1/10W 0603
024UMR00
0603
22
MxL7225-1 25A Dual Phase EVB User Manual
MxL7225-1EVB Bill of Materials
Table 9: EVB BGA Bill of Materials (Continued)
Item Qty
Reference
Designator
Value
Tol.
Description
Manufacturer /
Part Number
Package
Type
39
2
R27, R28
30.1kΩ
1%
RES 30.1K OHM 1/16W
1% 0402 SMD
Yageo
RC0402FR-0730K1L
0402
40
2
R29, R35
150kΩ
1%
RES, Thin Film, 150 Kohm, Vishay
1%, 1/10W, SMD, 0603
CRCW0603150KFKEA
41
2
R30, R36
90.9kΩ
1%
RES SMD 90.9K OHM 1%
1/10W 0603
Panasonic
ERJ-3EKF9092V
0603
42
2
R32, R38
30.1kΩ
1%
RES SMD 30.1K OHM 1%
1/10W 0603
Yageo
RC0603FR-0730K1L
0603
43
2
R33, R39
10kΩ
1%
RES SMD 10K OHM 1%
1/10W 0603
Yageo
RC0603FR-0710KL
0603
44
2
R52, R53
1kΩ
1%
RES SMD 1K OHM 1%
1/10W 0603
Panasonic
ERJ3EKF1001V
0603
45
1
R56
0Ω
Resistor 0 Ohm Jumper
1W,SMD
Vishay
2010
CRCW20100000Z0EFHP
46
1
R57
DNP
47
1
R58
0.010Ω
48
1
R59
DNP
49
1
U1
MxL7225-1_BGA
10/21/20
0603
Vishay
2010
CRCW20100000Z0EFHP
1%
RES., HIGH POWER,
0.01Ω, 2W, 1%, 2512
Rohm
PMR100HZPFU10L0
2512
2512
MXL IC MxL7225-1 144P
16X16X5.21-BGA
024UMR00
Maxlinear
MxL7225-1-ABA-T
BGA
23
MxL7225-1 25A Dual Phase EVB User Manual
Disclaimer
MaxLinear, Inc.
5966 La Place Court, Suite 100
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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