MaxLinear XR77103-MoCA User manual

MaxLinear Confidential
TBD/18 010-MCUMR00 i
• www.maxlinear.com • 010-MCUMR00
XR77103-MoCA
Universal PMIC 3 Output
Buck Regulator
EVB User Manual

XR77103-MoCA Universal PMIC 3 Output Buck Regulator EVB User Manual Revision History
February 14, 2022 010-MCUMR00 ii
Revision History
Document No. Release Date Change Description
010-MCUMR00 February 14, 2022 Initial release.

XR77103-MoCA Universal PMIC 3 Output Buck Regulator EVB User Manual Table of Contents
February 14, 2022 010-MCUMR00 iii
Table of Contents
Introduction...........................................................................................................................................................................1
Quick EVB Set Up and Start Up....................................................................................................................................1
Factory Settings ...................................................................................................................................................1
Quick Start Up ......................................................................................................................................................1
Reference Documentation ...................................................................................................................................................3
Ordering Information............................................................................................................................................................3
Evaluation Board Overview .................................................................................................................................................4
I/O and Test Points ...............................................................................................................................................................4
System Set-Up ......................................................................................................................................................................5
Jumper J3......................................................................................................................................................................5
Jumper J8......................................................................................................................................................................5
Jumper J11....................................................................................................................................................................5
XR77103-MoCA Schematic ..................................................................................................................................................7
XR77103-MoCA PCB Layers................................................................................................................................................8
XR77103-MoCA Bill of Materials........................................................................................................................................10

XR77103-MoCA Universal PMIC 3 Output Buck Regulator EVB User Manual List of Figures
February 14, 2022 010-MCUMR00 iv
List of Figures
Figure 1: Connecting and Monitoring VIN and VOUT...............................................................................................................2
Figure 2: Top View of XR77103-MoCA ..................................................................................................................................3
Figure 3: Simplified Block Diagram, XR77103-MoCA ............................................................................................................4
Figure 4: XR77103-MoCA Schematic ....................................................................................................................................7
Figure 5: Silkscreen Top.........................................................................................................................................................8
Figure 6: Assembly Top/Layer 1.............................................................................................................................................8
Figure 7: Layer 2 ....................................................................................................................................................................8
Figure 8: Layer 3 ....................................................................................................................................................................8
Figure 9: Assembly Bottom ....................................................................................................................................................9

XR77103-MoCA Universal PMIC 3 Output Buck Regulator EVB User Manual List of Tables
February 14, 2022 010-MCUMR00 v
List of Tables
Table 1: Jumper Connections for VIN, VOUT and PGND ........................................................................................................1
Table 2: Evaluation Board Ordering Part Number..................................................................................................................3
Table 3: Test Points................................................................................................................................................................4
Table 4: Factory Settings........................................................................................................................................................5
Table 5: Jumper J3 Options for the EN Pin ............................................................................................................................5
Table 6: Jumper J8 Pull Up Options for the PGOOD Pin .......................................................................................................5
Table 7: Jumper J11 and Operation from a 5V Rail ...............................................................................................................6
Table 8: XR77103MoCA Bill of Materials .............................................................................................................................10

XR77103-MoCA Universal PMIC 3 Output Buck Regulator EVB User Manual Introduction
February 14, 2022 010-MCUMR00 1
Introduction
The XR77103-MoCA PMIC is designed to power MaxLinear’s MoCA 2.0 MxL370x and MoCA 2.5 MxL371x along with a
single port Ethernet PHY such as the GPY241 device. It features three high efficiency synchronous buck regulators with
integrated power switches and sequencing engine to provide the 0.9V, 1.8V, and 3.3V rails of the MoCA SoC. The 0.9V
core rail can supply the 3A peaks demanded by the SoC and is compatible with the SoC DVS control.
The XR77103-MoCA can operate with 5V, 9V, and 12V powered systems with minimal required external components. The
XR77103-MoCA is also packaged in a 4x4mm QGN which provides the smallest size solution possible.
Quick EVB Set Up and Start Up
Factory Settings
The evaluation board has been set up with the following
factory default configuration for quick set up and operation:
■VIN = 5.5V to 14V, optimized for a 12V input rail.
■Maximum IOUT per channel is 2A.
■Hz Switching frequency.
■Two channels may be paralleled for output currents up
to 5A peak and 4A steady state (however additional
hardware modification is required for parallel
operation).
■Low power spectral density (PSM) mode operation
enabled.
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. For more information, see
“System Set-Up” on page 5 for more.
2. Connect a turned-off power supply that is within the
above VIN specification (from 5.5V to 14V, 12V typical)
to VIN+ and VIN- with short and thick leads. Use test
pins EXT. VIN (J39) and AGND (J7) to connect and
monitor VIN+ and VIN- respectively. See locations in
Figure 1 on page 2.
3. Initially set to 0A, connect electronic loads to each
desired channel that will be no more than the maximum
IOUT (2A) to VOUTx and PGNDx (where x = the
channel number) with short and thick leads. Use test
pins in Table 1 on page 1 to connect and monitor
VOUTx and PGNDx respectively. See locations in
Figure 1 on page 2. For all channels with the electronic
load connected, ensure that the respective VIN jumper
is installed per Table 1 on page 1.
4. Turn on the 12V power supply and check VOUT. The
EVB powers up and regulates the enabled outputs at
0.9V (Ch1), 1.8V (Ch2) and 3.3V (Ch3) (factory default
settings). PGOOD is asserted active high once
sequencing is done, outputs are in regulation, and
reset timer expires.
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. For more information
about monitoring, see “I/O and Test Points” on page 4 .
1. Factory default: jumpers installed.
Table 1: Jumper Connections for VIN, VOUT and PGND
Channel VIN(1) VOUT PGND
1 J14 VOUT1, J31 PGND1, J35
2 J20 VOUT2, J33 PGND2, J36
3 J24 VOUT3, J1 PGND3, J4

XR77103-MoCA Universal PMIC 3 Output Buck Regulator EVB User Manual Quick EVB Set Up and Start Up
February 14, 2022 010-MCUMR00 2
Figure 1: Connecting and Monitoring VIN and VOUT

XR77103-MoCA Universal PMIC 3 Output Buck Regulator EVB User Manual Reference Documentation
February 14, 2022 010-MCUMR00 3
Figure 2: Top View of XR77103-MoCA
Reference Documentation
For additional information, refer to the XR77103-MoCA
data sheet, including a full list of IC features, pinout, pin
descriptions, typical performance characteristics, and
external component calculations.
This manual provides the EVB schematics (“XR77103-
MoCA Schematic” on page 7 ), the PCB layout (“XR77103-
MoCA Schematic” on page 7 ) and the bill of materials
(“XR77103-MoCA Bill of Materials” on page 10 ) that you
can use on your board design.
For more information about the schematics, go to
www.maxlinear.com/XR77103-MoCA.
Ordering Information
Note: For the most up-to-date information, go to www.maxlinear.com/XR77103-MoCA.
Table 2: Evaluation Board Ordering Part Number
Evaluation Board Board Description
XR77103-MoCA-EVK-1 XR77103-MoCA evaluation board.

XR77103-MoCA Universal PMIC 3 Output Buck Regulator EVB User Manual Evaluation Board Overview
February 14, 2022 010-MCUMR00 4
Evaluation Board Overview
The XR77103-MoCA block diagram is shown in Figure 3.
Figure 3: Simplified Block Diagram, XR77103-MoCA
I/O and Test Points
VIN, LX and PGOOD Test Points
Test points are available for VIN (TP8), the LX switching nodes (TP6 for LX1, TP7 for LX2, and TP1 for LX3), the
compensation pins (TP4 for COMP1, TP5 for COMP2, TP3 for COMP3), and PGOOD (TP2) for monitoring.
The PGOOD output can be used externally. For more information about PGOOD options, see “Jumper J8” on page 5 .
Table 3: Test Points
Test Point Function
TP1 LX3
TP2 PGOOD
TP3 COMP3
TP4 COMP1
TP5 COMP2
TP6 LX1
TP7 LX7
TP8 VIN
XR77103-MoCA
V
IN
V
OUT1
EN
PGOOD
V
CC
V
OUT2
V
OUT3
V
IN1
V
IN2
V
IN3
J3
J14
J20
J24 V
CC
J8
V
CC
J11
J15 (SYNC)

XR77103-MoCA Universal PMIC 3 Output Buck Regulator EVB User Manual System Set-Up
February 14, 2022 010-MCUMR00 5
System Set-Up
Table 4 lists a summary of the jumpers and factory settings to configure the EVB for operation. For additional information,
refer to the XR77103-MoCA data sheet (206DS).
Jumper J3
Jumper J8
Jumper J11
For operation from a 5V rail, it is required that the LDO
output is connected to VIN, which can be accomplished by
populating J11. This enhances the operation of the drivers
for VIN < 5V.
Important: Remove J11 for operation at higher VIN. The
board also has Zener diode placeholders which can be
installed to protect the IC if higher VIN is accidentally
applied.
Table 4: Factory Settings
Jumper Factory Setting Description
EN Pin
J3 Jumper 1-2 EN pin is tied to VCC and channels are enabled at power up.
PGOOD Pin
J8 Jumper 1-2 PGOOD is pulled up to VCC.
5V Operation
J11 No jumper LDO output is not tied to VIN.
VIN Connection to Individual Channels
J14, J20, J24 Jumpers installed VIN is connected to VIN1, VIN2, and VIN3.
SYNC Pin
J15 No jumper SYNC is not tied to GND on the board.
Table 5: Jumper J3 Options for the EN Pin
Jumper Options Description
Jumper 1-2 (default) The EN (enable) pin is tied to VCC and channels are enabled at power up.
Jumper 2-3 The EN (enable) pin is tied to GND, permanently disabling the channels.
No jumper The jumper is open, allowing EN to be controlled external to the board.
Table 6: Jumper J8 Pull Up Options for the PGOOD Pin
Jumper Options Description
Jumper 1-2 (default) PGOOD is pulled up to the VCC pin.
No jumper PGOOD is not pulled up by this jumper.

XR77103-MoCA Universal PMIC 3 Output Buck Regulator EVB User Manual Jumper J11
February 14, 2022 010-MCUMR00 6
Jumpers J14, J20 and J24
Jumpers J14, J20 and J24 are available to connect or
disconnect VIN from VIN1, VIN2, and VIN3 respectively.
Factory default is VIN is connected to VIN1, VIN2, and
VIN3.
Jumper J15
Jumper J15 is available to ground SYNC. Factory default is
that the SYNC pin is grounded on the board. When not
grounded, the SYNC pin may be connected and
synchronized to an external clock in applications where
EMI control is critical.
Table 7: Jumper J11 and Operation from a 5V Rail
Jumper Options Description
Jumper 1-2 Ties the LDO output to VIN which is required for 5V operation.
No jumper (default) LDO output is not tied to VIN.

XR77103-MoCA Universal PMIC 3 Output Buck Regulator EVB User Manual XR77103-MoCA Schematic
February 14, 2022 010-MCUMR00 7
XR77103-MoCA Schematic
Figure 4: XR77103-MoCA Schematic
EN
SYNC
FB3
SYNC
FB2FB1
PG
FB1 FB2
EN
FB3
V5VVIN
VOUT3
V5V
VIN3
VIN
VIN1
VOUT2
VIN2
VOUT3
VIN
VOUT2
V5V
VOUT1
VOUT1
VIN1
VIN2
VIN3
C11
1nF
J25
PGND
1
C10
4.7uF
ICE1
XR77103-0R&$
VOUT3
1
COMP3
2
N.C
3
VIN
4
GND
5
V5V
6
COMP1
7
VOUT1
8
BST1
9
VIN1
10
LX1
11
LX1
12
LX2
13
LX2
14
VIN2
15
BST2
16
PGOOD 24
N.C 23
N.C 22
N.C 21
N.C 20
DGND 19
COMP2 18
VOUT2 17
BST3 32
VIN3 31
LX3 30 LX3 29
VIN 28
AGND 27
EN 26
SYNC 25
e-PAD 33
R22
N
C14
N.M
R4
0
R5
N.M
C4
N.M
C24
N.M
TP5
+
C30
N.M
J16
PGND
1
R15
N.M
C22
47nF
C26
N.M
C7
4.7uF
J36
PGND
1
R8
10k
R13 0
J3
J_EN
1
2
3
TP3
R16
N.M
R18
N
C6
4.7uF
F1
3.5A FUSE
C33
N.M
R11
10k
R21
N.M
R14
0
R20

C31
22uF
D2
N.M
C32
N.M
C18
4.7uF
J39
VIN_EXTERNAL
1
C12
1uF
TP4
J14
Jumper
1 2
TP8
J1
VOUT3
1
H1
C9
N.M
C27
22uF
R3
N.M
H2
C8
1nF
H3
R26
N.M
D1
N.M
J21
PGND
1
R23
N.M
J31
VOUT1
1
TP2
J33
VOUT2
1
TP7
H4
R1
N.M
R24
N.M
TP1
C34
N.M
J38
VIN_EXTERNAL
1
J23
VIN3
1
J7
AGND
1
L3
uH
C13
4.7uF
C35
N.M
J10
AGND
1
+
C2
N.M
TP6
C5
47nF
J11
Jumper
1 2
J15
Jumper
1 2
R12
10k
J13
VIN1
1
J6
EN
1
+
C25
N.M
J18
VIN2
1
C15
N.M
C1
N.M
R7
10k
J35
PGND
1
R25
N.M
C16
1nF
L2
3.3uH
C29
22uF
J20
Jumper
1 2
C3
22uF
J5
VIN
1
R2
N.M
J8
J_PGOOD
1 2 3
C21
47nF
J12
SYNC
1
R19
N.M
C17
1nF
J4
PGND
1
L1
3.3uH
C28
N.M
J24
Jumper
1 2
R6
0
VIN
PGOOD

XR77103-MoCA Universal PMIC 3 Output Buck Regulator EVB User Manual XR77103-MoCA PCB Layers
February 14, 2022 010-MCUMR00 8
XR77103-MoCA PCB Layers
Figure 5: Silkscreen Top Figure 6: Assembly Top/Layer 1
Figure 7: Layer 2 Figure 8: Layer 3

XR77103-MoCA Universal PMIC 3 Output Buck Regulator EVB User Manual XR77103-MoCA PCB Layers
February 14, 2022 010-MCUMR00 9
Figure 9: Assembly Bottom

XR77103-MoCA Universal PMIC 3 Output Buck Regulator EVB User Manual XR77103-MoCA Bill of Materials
February 14, 2022 010-MCUMR00 10
XR77103-MoCA Bill of Materials
Table 8: XR77103MoCA Bill of Materials
Item Qty Reference Designator Component Manufacturer /
Part Number
Package
Size
1 1 PCB XR77103 Evaluation Board MaxLinear
2 4 C3, C27, C29, C31 CAP CER 22uF 16V X5R 1206 10% Murata
GRM31CR61C226KE15K
1206
3 3 C5, C21, C22 CAP CER 47nF 50V X7R 10% Murata
GRM188R71H473KA61D
0603
4 5 C6, C7, C10, C13, C18 CAP CER 4.7uF 25V X7R 10% Murata
GRM21BR71E475KA73L
0805
5 4 C8, C11, C16, C17 CAP CER 1nF 50V X7R 10% Murata
GRM188R71H102KA01D
0603
6 1 C12 CAP CER 1uF, 10V, X7R, 10% Murata
GRM188R71A105KA61D
0603
7 7 R4,R6,R13,R14,R20,R27,R28 Resistor 0Ω,1/10W, SMD Panasonic
ERJ-3GEY0R00V
0603
8 5 R7,R8,R11R12,R18 Resistor 10.0kΩ, 1/10W, 1%, SMD Panasonic
ERJ-3EFK1002V
0603
9 1 R22 Resistor 80.6kΩ, 1/10W, 1%, SMD Panasonic
ERJ-3EFK80603V
10 1 F1 Fuse Board Mount 3.5A, 63VDC Vishay
MFU1206FF03500P100
1206
11 20 J1, J4, J5, J6, J7, J10, J12,
J13, J16, J18, J21, J23, J25,
J29, J31, J33, J35, J36, J38,
J39
Header 1-pin Wurth Elektronik
61300111121
2.54mm
12 2 J3, J8 Header 3-pin Wurth Elektronik
61300311121
2.54mm
13 5 J11, J14, J15, J20, J24 Jumper 2-pin Wurth Elektronik
61300211121
2.54mm
14 3 L1, L2, L3 Inductor 3.3µH, 6A, 30mΩ, SMD Vishay
IHLP2525CZER3R3M01
6.86 x
6.47mm
15 1 U1 Universal PMIC 3 Output Buck Regulator MaxLinear
XR77103ELBTR-MoCA
4mm x 4mm

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XR77103-MoCA Universal PMIC 3 Output Buck Regulator EVB User Manual Disclaimer
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