1
DEMO MANUAL DC2332A-A
Rev. 0
DESCRIPTION
LT8551
Multiphase Boost Converter Expander
Demonstration circuit 2332A-A is a multiphase boost
converter expander that features the LT
®
8551. The
DC2332A-A uses the LTC
®
3769 as primary controller
and LT8551 as a phase extender. The increased num-
ber of power phases, allowed by the LT8551, results in
higher output power without a corresponding increase in
design difficulty or a sacrifice of the primary controller
LTC3769features.
The input voltage range of DC2332A-A is from 6V to 46V
and the output is 48V. The maximum input current is
10A per power section, so the maximum input current
of DC2332A-A is 50A. It can produce a 25A output cur-
rent and output power of 1,200W with an input voltage
of 24V. Correspondingly, output current will drop to 12A
and output power to 576W at 12VIN. Higher output power
can be achieved at a 12VIN if heat sinks are installed,
seeParts List.
The switching frequency is 350kHz and at a 24VIN to a
48V
OUT
at full load, the efficiency of DC2133A-A is 97.5%.
As the input voltage decreases, the output current should
be decreased to prevent saturation of the DC2133A-A’
inductors, (see the derating curve in Figure3 and effi-
ciency curves in Figure4).
The DC2332A-A supports an option to program the
phase relationship between the power sections, setting
the Total Distinct Phase Number (TDPN). For increased
efficiency and reduced switching losses at light loads the
DC2332A-A supports disconnecting some power sections
or stage shedding, which can be programmed by stage
shed jumper JP3. Jumper JP1 programs the LT8551
SYNC pin to allow the DC2332A-A to be synchronized to
an external clock.
All registered trademarks and trademarks are the property of their respective owners.
The DC2332A-A uses jumper JP2 to enable or disable the
controller. The SYNC (E19) input can be used to sync the
LT8551 with external signal. There are also terminals that
make it easy to monitor the control logic between master
and slave DC2332’s (if used). Removal of jumper resis-
tors can cleanly separate the electrical interface between
the LTC3769 primary controller and the remainder of
DC2332A-A, making it possible to connect an alternate
primary controller in place of the LTC3769. Noise immune
signal and ground via pairs are available to reestablish the
connections between the DC2332A-A and twisted wire
pairs sensing the new primary controller.
The DC2332A-A includes filters and filter options for
inputs to the LT8551 in accordance with data sheet rec-
ommendations. Under voltage shutdown, switching fre-
quency and LT8551 ILIM current limit levels can all be
adjusted by resistors or resistor jumpers. The DC2332A-A
comes with a housekeeping circuit that provides an 5.0V
input voltage to the LT8551. The housekeeping circuit
based on U3 and the LT8631reduces the power dissipa-
tion that would otherwise occur at high input voltages in
regulator transistor Q21. The DC2133A-A uses resistors
to sense inductor current but can be configured for DCR
sensing of inductor current as well.
A high level of available output power without a cor-
responding high level of design complexity makes the
LT8551 attractive for high current DC bus and battery
systems in commercial, industrial and automotive set-
tings. The DC2332A-A features the LT8551EUKG in a
thermally enhanced 52-pin 7mm × 8mm QFN package.
The LT8551 and LTC3769 data sheets must be read in
conjunction with this demo manual to properly use or
modifyDC2332A-A.
Design files for this circuit board are available.
2
DEMO MANUAL DC2332A-A
Rev. 0
QUICK START PROCEDURE
To evaluate the performance of DC2332A-A follow pro-
cedure below:
1. Read LT8551 data sheet, conduct visual inspection
of DC2332A-A, locating input/output terminals and
control jumpers.
2. Prepare to use the SHDN terminal to control the startup:
Connect the SHDN terminal to GND by setting jumper
JP2 SHDN into OFF position.
3. Set the STAGE SHED MODE jumper JP4 to ENABLE
if phase shedding is desired or to DISABLE if phase
shedding is not desired.
4. Set the SYNC jumper JP1 to GND.
5. Verify the phase selection resistors.
6. Connect the input power supply with power off, load
and meters as shown on Figure1.
7. Make sure that input power supply is 1,500W and
output current at least 60A, the same related to load,
it should be at least 1,500W and 60V rating.
8. After connections are made, turn on the input power
supply and verify that input voltage between 6V and
46V.
9. Set output load to 0A.
10. Set jumper JP2 SHDN into ON position, you should
observe 48V on the output terminals and the load.
11. Once the proper output voltage is established, adjust
the load and observe the output voltage regulation,
ripple voltage, efficiency and other parameters.
NOTE: If the output voltage is low, try startup again
using SHDN with the load disconnected. The load
may cause low output if some of the DC2332A power
sections are inadvertently disconnected and not able
to deliver power. It is possible the input supply may
current limit and cause DC2332A to have low output.
In more extreme cases it is possible that the load may
be set too high for DC2332A.
The DC2332A-A supports the multi-chip (master-slave)
feature of the LT8551 so the total number of power sec-
tions can be increased in four power section increments:
The DC2133A-A (master) and future, under development,
DC2133A-B (slave), use the same PCB. Please use nota-
tion [2] in the electrical schematic for assembling slave
group of phases. DC2332A-A is designed so it is easy to
add power sections and increase output power. The mas-
ter and slave assemblies are programmed using jumpers
and adjustment of regulation loop compensation is usu-
ally not necessary as power sections are added. The con-
trol signal interface between master and slave assemblies
is a common ribbon cable.
PERFORMANCE SUMMARY
Specifications are at TA = 25°C
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage, VIN 12 V
Maximum Input Voltage, VIN 46 V
Output Voltage, VOUT 48 V
Input current, IIN 50 A
Efficiency VIN = 24V, IOUT = 25A 97.5 %
Switching Frequency 350 kHz
4
DEMO MANUAL DC2332A-A
Rev. 0
QUICK START PROCEDURE
Figure3. Derating Guidelines, Output Current vs Input Voltage
INPUT VOLTAGE (V)
10
OUTPUT CURRENT (A)
35
25
30
20
10
15
5
020 3015 25 40
DC2332 F03
50
35 45
CONSTANT INPUT CURRENT 50A
CONSTANT OUTPUT POWER 1500W
OUTPUT CURRENT (A)
5
EFFICIENCY (%)
99.0
98.5
98.0
97.0
97.5
96.5
95.5
96.0
95.0
94.5 10
DC2332 F04
25
2015
VIN = 36V
VIN = 24V
VIN = 12V
Figure5. Thermal Map of Four Phases of LT8551 Multiphase Boost Converter Expander
(VIN = 24.0V, VOUT = 48.0V, IOUT = 25A, TMAX = 72.1°C), TA = 25°C without Cooling Fan
Figure4. Efficiency vs Output Current and
Input Voltage, VOUT is 48V
5
DEMO MANUAL DC2332A-A
Rev. 0
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 4 CIN1, CIN3, CIN5, CIN7 CAP., X7R, 10µF, 50V, 10%, 1210 MURATA, GRM32ER71H106KA12L
2 1 CIN9 CAP., X7R, 10µF, 50V, 10%, 1210 MURATA, GRM32ER71H106KA12L
3 12 CIN2, CIN4, CIN6, CIN8, COUT2,
COUT3, COUT5, COUT6, COUT8,
COUT9, COUT11, COUT12
CAP., X7R, 15µF, 100V, 20%, 2220 TDK, CGA9P3X7S2A156M250
4 4 COUT1, COUT4, COUT7, COUT10 CAP., X7S, 4.7µF, 100V, 10%, 1210 MURATA, GRJ32DC72A475KE11L
5 3 CIN10, COUT14, COUT15 CAP., X7R, 15µF, 100V, 20%, 2220 MURATA, KRM55WR72A156MH01K
6 1 COUT13 CAP., X7S, 4.7µF, 100V, 10%, 1210 MURATA, GRJ32DC72A475KE11L
7 1 C1 CAP., X7R, 1µF, 50V, 10%, 1206 MURATA, GRM31CR71H105KA61L
8 2 C2, C33 CAP., X5R, 2.2µF, 16V, 10%, 0603 MURATA, GRM188R61C225KE15D
9 1 C3 CAP., X5R, 10µF, 16V, 10%, 0603 MURATA, GRM188R61C106KAALD
10 10 C4, C7, C8, C9, C10, C11, C12, C13,
C35, C55
CAP., X7R, 1nF, 25V, 10%, 0603 MURATA, GRM188R71E102KA01D
11 3 C5, C15, C30 CAP., X7R, 1nF, 25V, 10%, 0603 MURATA, GRM188R71E102KA01D
12 1 C6 CAP., X7R, 100pF, 16V, 10%, 0603 AVX, 0603YC101KAT2A
13 1 C16 CAP., ALUM., 10µF, 100V, 20% SUN ELEC., 100CE10BS
14 4 C17, C18, C19, C20 CAP., X7R, 0.22µF, 16V, 10%, 0603 MURATA, GRM188R71C224KA01D
15 3 C21, C27, C34 CAP., X7R, 0.1µF, 50V, 10%, 0603 MURATA, GRM188R71H104KA93D
16 1 C22 CAP., X7R, 0.22µF, 16V, 10%, 0603 MURATA, GRM188R71C224KA01D
17 1 C23 CAP., X7R, 1µF, 50V, 10%, 1206 MURATA, GRM31CR71H105KA61L
18 1 C24 CAP., X7R, 1µF, 16V, 10%, 0603 MURATA, GRM188R71C105KA12D
19 1 C25 CAP., X5R, 1µF, 25V, 10%, 0603 AVX, 06033D105KAT2A
20 1 C26 CAP., NP0, 4.7pF, 50V, ±0.25pF, 0603 MURATA, GRM1885C1H4R7CA01D
21 1 C28 CAP., X7R, 2.2µF, 100V, 10%, 1210 MURATA, GRM32ER72A225KA35L
22 1 C29 CAP., X7R, 4.7µF, 16V, 10%, 0805 MURATA, GRM21BR71C475KA73L
23 1 C31 CAP., 0.015µF, 10V, U2J, 0603 MURATA, GRM1887U1A153JA01D
24 1 C32 CAP., X5R, 47µF, 16V, 10%, 1210 MURATA, GRM32ER61C476KE15K
25 2 C36, C57 CAP., X7R, 0.01µF, 16V, 10%, 0603 MURATA, GRM188R71C103KA01D
26 1 C37 CAP., X7R, 0.1µF, 50V, 10%, 0603 MURATA, GRM188R71H104KA93D
27 1 C58 CAP., NP0, 22pF, 50V, 5%, 0603 MURATA, GRM1885C1H220JA01D
28 2 C60, C61 CAP., ALUM., 100µF, 100V, 20% SUN ELEC., 100CE100BST+D
29 2 C62, C63 CAP., ALUM., 1000µF, 50V, 20% PANASONIC, EEEFK1H102AM
30 4 D1, D2, D3, D4 DIODE, SCHOTTKY, 70V, SOD323 INFINEON, BAS170WE6327HTSA1
31 1 D5 DIODE, SCHOTTKY, 70V, SOD323 INFINEON, BAS170WE6327HTSA1
32 2 D6, D7 DIODE, SCHOTTKY, 100V, SOD323 NEXPERIA, BAT46WJ,115
33 1 D8 DIODE, 1N4448HWT, SOD523 DIODES INC.,1N4448HWT-7
34 4 L1,L2,L3,L4 IND., 10µH COILCRAFT, SER2918H-103KL
35 1 L5 IND., 10µH COILCRAFT, SER2918H-103KL
36 1 L6 IND., 22µH WURTH ELEKTRONIK, 7447779122
6
DEMO MANUAL DC2332A-A
Rev. 0
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
37 20 Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9,
Q10, Q11, Q12, Q13, Q14, Q15, Q16,
Q17, Q18, Q19, Q20
XSTR., MOSFET, 60V, PG-TDSON-8 INFINEON, BSC100N06LS3GATMA1
38 1 Q21 MOSFET, P-CH 100V 2.6A SOT223 DIODES INC., ZXMP10A18G
39 5 RSNS1, RSNS2, RSNS3, RSNS4,
RSNS5
RES., SENSE, 0.004Ω, 3W, 1%, 2512 PANASONIC, ERJ-MS4SF4M0U
40 1 R1 RES., 71.5k, 1/10W, 1%, 0603 VISHAY, CRCW060371K5FKEA
41 1 R2 RES., 100k, 1/10W, 1%, 0603 VISHAY, CRCW0603100K0FKEA
42 1 R3 RES., 21.5k, 1/10W, 1%, 0603 VISHAY, CRCW060321K5FKEA
43 3 R4, R9, R16 RES., 47k, 1/10W, 5%, 0603 VISHAY, CRCW060347K0JNEA
44 7 R7, R11, R12, R13, R14, R15, R24 RES., 10Ω, 1/10W, 5%, 0603 VISHAY, CRCW060310R0JNEA
45 1 R8 RES., CHIP, 20Ω, 1/10W, 5%, 0603 VISHAY, CRCW060320R0JNEA
46 1 R10 RES., 1Ω, 1/10W, 5%, 0603 VISHAY, CRCW06031R00JNEA
47 1 R17 RES., 12.1k, 1/10W, 1%, 0603 VISHAY, CRCW060312K1FKEA
48 1 R18 RES., 464k, 1/10W, 1%, 0603 VISHAY, CRCW0603464KFKEA
49 1 R19 RES., 7.87k, 1/10W, 1%, 0603 VISHAY, CRCW06037K87FKEA
50 1 R20 RES., 10k, 1/10W, 5%, 0603 VISHAY, CRCW060310K0JNEA
51 3 R21, R25, R34 RES., 10Ω, 1/10W, 5%, 0603 VISHAY, CRCW060310R0JNEA
52 1 R26 RES., 10k, 1/10W, 5%, 0603 VISHAY, CRCW060310K0JNEA
53 1 R27 RES., 25.5k, 1/10W, 1%, 0603 VISHAY, CRCW060325K5FKEA
54 1 R28 RES., 162k, 1/10W, 1%, 0603 VISHAY, CRCW0603162KFKEA
55 2 R29, R61 RES., 1M, 1/10W, 1%, 0603 VISHAY, CRCW06031M00FKEA
56 1 U1 I.C., LT8551, 52QFN ANALOG DEVICES, LT8551EUKG#PBF
57 1 U2 I.C., REG BOOST CONTROLLER, 24QFN ANALOG DEVICES, LTC3769EUF#PBF
58 1 U3 I.C., REG., TSSOP28FE-EA ANALOG DEVICES, LT8631EFE#PBF
Additional Demo Board Circuit Components
1 0 C14, C38, C39, C40, C41, C42, C43,
C44, C45, C46, C47, C48, C49, C50,
C51, C52, C53, C54, C56(OPT)
CAP., OPTION, 0603
2 21 E1, E2, E3, E4, E5, E6, E7, E8, E9, E10,
E11, E12, E13, E14, E15, E16, E17,
E19, E21, E22, E23, E24, E25, E26, E27
TESTPOINT, TURRET, 0.061" MILL-MAX, 2308-2-00-80-00-00-07-0
3 2 E28, E29 TESTPOINT, TURRET, 0.094" MILL-MAX, 2501-2-00-80-00-00-07-0
4 3 JP1, JP2, JP3 HEADER 3-PIN 0.079" SINGLE ROW WURTH ELEKTRONIK, 62000311121
5 2 XJP1, XJP3 SHUNT, 2mm WURTH ELEKTRONIK, 60800213421
6 1 XJP2 SHUNT, 2mm, GOLD SULLINS CONNECTOR, NPN02SXLN-RC
7 4 J1-J4 STUD, TEST PIN PEM, KFH-032-10ET
8 8 (J1-J4) NUT, BRASS NUTS # 10-32 ANY, 10-32M/S BR PL
9 12 (J1-J4) RING, LUG RING # 10 KEYSTONE, 8208
10 4 (J1-J4) WASHER, TIN PLATED BRASS ANY, #10EXT- BZ TN
11 0 J5, J6 HEADER, 2X7PIN, 0.079" MOLEX, 87831-1420
7
DEMO MANUAL DC2332A-A
Rev. 0
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
12 29 R5, R6, R22, R23, R30, R35, R36,
R37, R38, R39, R40, R41, R49, R53,
R56, R62, R82, R89, R90, R91, R92,
R93, R99, R100, R101, R112, R115,
R117, R118
RES., 0Ω, 1/10W, 1%, 0603 VISHAY, CRCW06030000Z0EA
13 0 R31, R32, R33, R42, R43, R44, R45,
R46, R47, R50, R51, R52, R54, R55,
R57, R58, R59, R60, R63, R64, R65,
R66, R67, R68, R69, R70, R71, R76,
R77, R78, R79, R80, R81, R84, R85,
R86, R87, R88, R94, R95, R96, R97,
R98, R102, R103, R104, R105, R111,
R113, R114, R116, R119, R120
RES., OPTION, 0603
14 0 R72, R73, R74, R75 (OPT) RES., OPTION, 0805
15 0 R83 (OPT) RES., OPTION, 0805
16 HS1, HS2, HS3, HS4, HS5 (5) OPT., HEATSINK, 67605 SERIES, 24mm × 15.04mm OPT., AAVID THERMALLOY, 676053B01969G
17 WASHER (10) OPT., WASHER SHOULDER #4 NYLON OPT., KEYSTONE ELECTRONICS, 3049
18 THERMAL PAD (5) OPT., THERMAL INTERFACE PRODUCTS SIL PAD 400 OPT., BERGQUIST COMPANY, SP400-0.007
Hardware
1 21 E1, E2, E3, E4, E5, E6, E7, E8, E9, E10,
E11, E12, E14, E15, E16, E19, E21,
E22, E23, E24, E27
TESTPOINT, TURRET, 0.061" MILL-MAX, 2308-2-00-80-00-00-07-0
2 2 E28, E29 TESTPOINT, TURRET, 0.094" MILL-MAX, 2501-2-00-80-00-00-07-0
3 3 JP1, JP2, JP3 HEADER 3-PIN 0.079" SINGLE ROW WURTH ELEKTRONIK, 62000311121
4 5 XJP1, XJP2, XJP3, XJP4, XJP5 SHUNT, 2mm WURTH ELEKTRONIK, 60800213421
5 4 J1-J4 STUD, TEST PIN PEM, KFH-032-10ET
6 8 (J1-J4) NUT, BRASS NUTS # 10-32 ANY, 10-32M/S BR PL
7 12 (J1-J4) RING, LUG RING # 10 KEYSTONE, 8208
8 4 (J1-J4) WASHER, TIN PLATED BRASS ANY, #10EXT- BZ TN
9 4 MH1-MH4 STAND-OFF, NYLON 1.0 WURTH ELEKTRONIK, 702939000
10 J5, J6 HEADER, 2X7PIN, 0.079" MOLEX, 87831-1420
8
DEMO MANUAL DC2332A-A
Rev. 0
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
LTC3769
LT8551 PRIMARY CONTROLLER
OPTIONAL
DCR SENSE
[1.]
[2.]
[3.]
[2.]
[2.]
[2.]
*
*SEE THE DEMO MANUAL FOR CURRENT RATING
SLV CONNECT PRM
SLV CONNECT SEC
OPT
OPT
02-07-2018
WITH INTERNAL GATE DRIVERS
VOUT
PLLIN/MODE
TG
BOOST
BG
RUN
INTVCC
SENSE+
SW
REGSNS
ISP
ENOUT
BGSH
TGSR
TGSH
TGSL
CLK1
SHDN
ISP_DCR SENSE+_DCR
CLK1
TGBUF
BGBUF
BGBUF/BGSH
TGBUF/TGSH
CLK1/SYNC
SYNC
PGOOD
BGBUF/BGSH
TGBUF/TGSH
CLK1/SYNC
CLK1/SYNC
IAMPP
IAMPN
CLK1/SYNC
CLK2
MODE REGSNS
TGBUF/TGSH
BGBUF/BGSH
ENOUT
TGBUF/TGSH
BGBUF/BGSH
ISN_DCR SENSE-_DCR
ISN SENSE-
EXTVCC
VAUX
VIN
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
VK
PRODUCTION
402-07-2018
__
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
VK
PRODUCTION
402-07-2018
__
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
VK
PRODUCTION
402-07-2018
__
DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES.
APP ENG.
Phone: (408)432-1900
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND
SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
www.analog.com
SKU NO.
IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES
APPLICATIONS ENGINEERING FOR ASSISTANCE.
16
LT
VK
LT8551EUKG
MULTIPHASE BOOST CONVERTER EXPANDER
DC2332A(A,B)
710-DC2332A(A,B)_REV04
N/A DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES.
APP ENG.
Phone: (408)432-1900
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND
SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
www.analog.com
SKU NO.
IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES
APPLICATIONS ENGINEERING FOR ASSISTANCE.
16
LT
VK
LT8551EUKG
MULTIPHASE BOOST CONVERTER EXPANDER
DC2332A(A,B)
710-DC2332A(A,B)_REV04
N/A DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES.
APP ENG.
Phone: (408)432-1900
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND
SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
www.analog.com
SKU NO.
IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES
APPLICATIONS ENGINEERING FOR ASSISTANCE.
16
LT
VK
LT8551EUKG
MULTIPHASE BOOST CONVERTER EXPANDER
DC2332A(A,B)
710-DC2332A(A,B)_REV04
N/A
R32
OPT
TP19
ISP_DCR
TP14
SENSE-
E14
GND
E26 PLLIN/MODE
TP21
CLK1
TP18
BGBUF
J1
VIN
6V - 46V
TP3
SENSE-_DCR
TP22 INTVCC
R31
OPT
TP10
BGSH
J4
GND
R40
0
E27 ENOUT
E1
VIN+
TP8 BOOST
R35
0
J2
GND
R41
0
R36
0
R49
0
TP26
GND
R37
0
R38
0
R30
0
R56
0
TP16
TGSL
TP30
VAUX
TP12
ENOUT
TP31 EXTVCC
+
C62
1000uF
50V
EEEFK1H102AM
E7
CLK2
R62
0
J3
VOUT
48V
E5
IAMPN
J5
7
7
9
9
1
122
66
44
10 10
5
5
11
11 12 12
14 14
13
13
3
3
88
+
C63
1000uF
50V
EEEFK1H102AM
TP6
TGBUF
TP27
GND
TP4
SENSE+
E17 PGOOD
E15 GND
TP29
GND
TP7
TGSR
E16 CLK1/SYNC
TP28
GND
+
C60
100uF
100V
100CE100BST
TP23 TG
E29
GND
J6
7
7
9
9
1
122
66
44
10 10
5
5
11
11 12 12
14 14
13
13
3
3
88
E8
SHDN
____
R98
OPT
JP2
SHDN
OFF
ON
1
3
2
E6
MODE
E19
SYNC
TP11
CLK1
TP5
ISN
E13 RUN
TP9
ISN_DCR
TP13
REGSNS
R39
0
R102
OPT
E28
VIN
TP20
SENSE+_DCR
E21 REGSNS
E2
VIN-
E22
GND
E23 GND
E12 BGBUF/BGSH
TP17 BG
TP25
ISP
E24 GND
E3 GND
TP15
TGSH
+
C61
100uF
100V
100CE100BST
E10
VO-
TP24 SW
R53
0
E11 TGBUF/TGSH
E25 GND
E9
VO+
E4 IAMPP
R33
OPT
R103
OPT
IAMPPIAMPN
CLK2
REGSNS
ENOUT
MODE
9
DEMO MANUAL DC2332A-A
Rev. 0
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
350kHz
[4.]
[2.]
[2.]
[2.]
[2.]
[2.]
[2.]
[2.]
[2.]
[2.]
[2.]
[2.]
[2.]
[2.]
TDPN SET
GND
FLOAT
STAGE SHED
WITH INTERNAL GATE DRIVERS
02-07-2018
PHS1
GND
REG
GND
PHS2
REG
GND
PHS3
REG
VOUT
TGSH
TGSL
REGSNS
TGSR
ISN
ISP
BGSH
CLK1
REG
SHDN
ENOUT
TGBUF
BGBUF
CLK2
IAMPN
IAMPP
ISP_DCR
ISN_DCR
MODE
VCC
VIN
SYNC
VCC
VCC
DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES.
APP ENG.
Phone: (408)432-1900
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND
SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
www.analog.com
SKU NO.
IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES
APPLICATIONS ENGINEERING FOR ASSISTANCE.
26
LT
VK
LT8551EUKG
MULTIPHASE BOOST CONVERTER EXPANDER
DC2332A(A,B)
710-DC2332A(A,B)_REV04
N/A DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES.
APP ENG.
Phone: (408)432-1900
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND
SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
www.analog.com
SKU NO.
IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES
APPLICATIONS ENGINEERING FOR ASSISTANCE.
26
LT
VK
LT8551EUKG
MULTIPHASE BOOST CONVERTER EXPANDER
DC2332A(A,B)
710-DC2332A(A,B)_REV04
N/A DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES.
APP ENG.
Phone: (408)432-1900
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND
SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
www.analog.com
SKU NO.
IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES
APPLICATIONS ENGINEERING FOR ASSISTANCE.
26
LT
VK
LT8551EUKG
MULTIPHASE BOOST CONVERTER EXPANDER
DC2332A(A,B)
710-DC2332A(A,B)_REV04
N/A
R63
OPT
JP1
SYNC
SYNC
GND
1
3
2
R97 OPT
C2
2.2uF
C35
1nF
R1
71.5k 1%
C27
0.1uF
R80
OPT
C9
1nF
C52
OPT
R2
100k
D6
BAT46WJ
1 2
C8
1nF
R7
10
R43
OPT
R119
OPT
C48
OPT
R4
47k
5%
C55
1nF
C36
10nF
R114
OPT
R3
21.5k
1%
R115
0
R6
0
C56
OPT
C54
OPT
JP3
MODE
ENABLE
DISABLE
1
3
2
Q21
ZXMP10A18G 1
234
R118
0
R42
OPT R95
OPT
C6
100pF
U1A
LT8551EUKG
REGSNS
40
REGIS
47
REGDRV
48
REG
3
VCC
29
ILIM
27
MODE
30
IAMPP
33
IAMPN
32
ISP
35
ISN
34
TGSR
17
TGSH
18
TGSL
19
TGBUF 13
BGBUF 12
BGSH 22
CLK1 21
CLK2 20
SYNC 23
RT/MS 26
PHS1 25
PHS2 24
PHS3 41
SHDN 31
ENOUT 28
NC
42
GND
53
C51
OPT
C7
1nF
R23
0
R11
10
R117
0
R96
OPT
R105
OPT
R8
20
C4
1nF
C3
10uF
R24
10
R10
1
R116
OPT
R5
0
C5
1nF
R81
OPT
D7
BAT46WJ
12
VCC
VCC
VCC
VCC
10
DEMO MANUAL DC2332A-A
Rev. 0
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
WITH INTERNAL GATE DRIVERS
02-07-2018
VOUT
VOUT
REG
REG
ISP1_DCR
ISN1_DCR
ISP2_DCR
ISN2_DCR
ISN1_DCR
ISP1_DCR
ISN2_DCR
ISP2_DCR
VAUX
VIN
VIN
DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES.
APP ENG.
Phone: (408)432-1900
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND
SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
www.analog.com
SKU NO.
IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES
APPLICATIONS ENGINEERING FOR ASSISTANCE.
36
LT
VK
LT8551EUKG
MULTIPHASE BOOST CONVERTER EXPANDER
DC2332A(A,B)
710-DC2332A(A,B)_REV04
N/A DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES.
APP ENG.
Phone: (408)432-1900
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND
SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
www.analog.com
SKU NO.
IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES
APPLICATIONS ENGINEERING FOR ASSISTANCE.
36
LT
VK
LT8551EUKG
MULTIPHASE BOOST CONVERTER EXPANDER
DC2332A(A,B)
710-DC2332A(A,B)_REV04
N/A DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES.
APP ENG.
Phone: (408)432-1900
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND
SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
www.analog.com
SKU NO.
IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES
APPLICATIONS ENGINEERING FOR ASSISTANCE.
36
LT
VK
LT8551EUKG
MULTIPHASE BOOST CONVERTER EXPANDER
DC2332A(A,B)
710-DC2332A(A,B)_REV04
N/A
CIN1
10uF
50V
1210
Q4
BSC100N06LS3
3
2
1
4
5
CIN2
15uF
100V
2220
R73
OPT
0805
C1
1uF
1206
50V
COUT5
15uF
2220
100V
C19
0.22uF
R88
OPT
Q2
BSC100N06LS3
3
2
1
4
5
CIN4
15uF
100V
2220
C50
OPT
Q6
BSC100N06LS3
3
2
1
4
5
R86
OPT RSNS1
0.004
2512
1%
COUT1
4.7uF
1210
100V
U1B
LT8551EUKG
VIN
49 BST1 14
TG1 15
SW1 16
BG1 11
ISP1 43
ISN1 44
BST2 7
TG2 8
SW2 9
BG2 10
ISP2 37
ISN2 36
R46 OPT
C13
1nF
R45 OPT
L1
10uH
SER2918H-103KL
C17
0.22uF
Q5
BSC100N06LS3
3
2
1
4
5
C38
OPT
R69
OPT
C40
OPT
Q7
BSC100N06LS3
3
2
1
4
5
COUT6
15uF
2220
100V
R66
OPT
C12
1nF
R79
OPT
CIN3
10uF
50V
1210
R68
OPT
R60
OPT
C44
OPT
D1
BAS170W
1 2
R89
OPT
D2
BAS170W
1 2
COUT3
15uF
100V
2220
COUT4
4.7uF
1210
100V
L2
10uH
SER2918H-103KL
R94
OPT
RSNS2
0.004
2512
1%
COUT2
15uF
100V
2220
R13 10
R87
OPT
R12 10
Q8
BSC100N06LS3
3
2
1
4
5
Q3
BSC100N06LS3
3
2
1
4
5
R67
OPT
R57
OPT
R72
OPT
0805
C42
OPT
R78
OPT
C49
OPT
TP2
Q1
BSC100N06LS3
3
2
1
4
5
ISN1
ISN2
ISP1
ISP2
ISN1
ISP1
ISP2
ISN2
11
DEMO MANUAL DC2332A-A
Rev. 0
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
WITH INTERNAL GATE DRIVERS
02-07-2018
VOUT
VOUT
REG
REG
ISP3_DCR
ISN3_DCR
ISP4_DCR
ISN4_DCR
ISP3_DCR
ISN3_DCR
ISN4_DCR
ISP4_DCR
VIN
VIN
DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES.
APP ENG.
Phone: (408)432-1900
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND
SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
www.analog.com
SKU NO.
IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES
APPLICATIONS ENGINEERING FOR ASSISTANCE.
46
LT
VK
LT8551EUKG
MULTIPHASE BOOST CONVERTER EXPANDER
DC2332A(A,B)
710-DC2332A(A,B)_REV04
N/A DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES.
APP ENG.
Phone: (408)432-1900
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND
SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
www.analog.com
SKU NO.
IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES
APPLICATIONS ENGINEERING FOR ASSISTANCE.
46
LT
VK
LT8551EUKG
MULTIPHASE BOOST CONVERTER EXPANDER
DC2332A(A,B)
710-DC2332A(A,B)_REV04
N/A DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES.
APP ENG.
Phone: (408)432-1900
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND
SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
www.analog.com
SKU NO.
IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES
APPLICATIONS ENGINEERING FOR ASSISTANCE.
46
LT
VK
LT8551EUKG
MULTIPHASE BOOST CONVERTER EXPANDER
DC2332A(A,B)
710-DC2332A(A,B)_REV04
N/A
Q15
BSC100N06LS3
3
2
1
4
5
C45
OPT
COUT12
15uF
100V
2220
Q13
BSC100N06LS3
3
2
1
4
5
R90
OPT
C20
0.22uF
C46
OPT
CIN8
15uF
100V
2220
R71
OPT
C39
OPT
L4
10uH
SER2918H-103KL
CIN5
10uF
50V
1210
COUT11
15uF
100V
2220
R15 10
COUT8
15uF
100V
2220
R65
OPT
R64
OPT
Q9
BSC100N06LS3
3
2
1
4
5
R44 OPT
RSNS4
0.004
2512
1%
D3
BAS170W
1 2
R76
OPT
R59
OPT
R47 OPT
R93
OPT
U1C
LT8551EUKG
BST3 6
TG3 5
SW3 4
BG3 2
ISP3 46
ISN3 45
BST4 52
TG4 51
SW4 50
BG4 1
ISP4 39
ISN4 38
Q10
BSC100N06LS3
3
2
1
4
5
L3
10uH
SER2918H-103KL
C11
1nF
CIN7
10uF
50V
1210
R70
OPT
COUT10
4.7uF
1210
100V
Q11
BSC100N06LS3
3
2
1
4
5
R58
OPT
COUT9
15uF
100V
2220
R92
OPT
Q14
BSC100N06LS3
3
2
1
4
5
C18
0.22uF
R14 10
C47
OPT
C10
1nF
RSNS3
0.004
2512
1%
CIN6
15uF
100V
2220
R77
OPT
COUT7
4.7uF
1210
100V
Q16
BSC100N06LS3
3
2
1
4
5
Q12
BSC100N06LS3
3
2
1
4
5
C41
OPT
C43
OPT
R91
OPT
R75
OPT
0805
D4
BAS170W
1 2
R74
OPT
0805
ISN3
ISN4
ISP3
ISN3
ISP4
ISN4
ISP4
ISP3
12
DEMO MANUAL DC2332A-A
Rev. 0
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
[3.]
WITH INTERNAL GATE DRIVERS
02-07-2018
VOUT
VOUT
TG
SW
BG
BOOST
INTVCC SENSE+_DCR
SENSE-_DCR
SENSE-
SENSE+SENSE+_DCR
SENSE-_DCR
PGOOD
INTVCC
RUN
PLLIN/MODE
EXTVCC
INTVCC
INTVCC
VIN
VIN
VIN
DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES.
APP ENG.
Phone: (408)432-1900
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND
SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
www.analog.com
SKU NO.
IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES
APPLICATIONS ENGINEERING FOR ASSISTANCE.
56
LT
VK
LT8551EUKG
MULTIPHASE BOOST CONVERTER EXPANDER
DC2332A(A,B)
710-DC2332A(A,B)_REV04
N/A DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES.
APP ENG.
Phone: (408)432-1900
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND
SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
www.analog.com
SKU NO.
IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES
APPLICATIONS ENGINEERING FOR ASSISTANCE.
56
LT
VK
LT8551EUKG
MULTIPHASE BOOST CONVERTER EXPANDER
DC2332A(A,B)
710-DC2332A(A,B)_REV04
N/A DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES.
APP ENG.
Phone: (408)432-1900
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND
SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
www.analog.com
SKU NO.
IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES
APPLICATIONS ENGINEERING FOR ASSISTANCE.
56
LT
VK
LT8551EUKG
MULTIPHASE BOOST CONVERTER EXPANDER
DC2332A(A,B)
710-DC2332A(A,B)_REV04
N/A
C53
OPT
R17
12.1k
1%
Q19
BSC100N06LS3
3
2
1
4
5
C57
10nF
C58
22pF
R16
47K
C23
1uF
50V
1206
R55
OPT
C29
4.7uF
0805
R99
0
C30
1nF
R104
OPT
C22
0.22uF
R22 0
R19
7.87k
1%
R50
OPT
R101
0
U2
LTC3769EUF
PLLIN/MODE
9
FREQ
7
ITH
16
VFB 15
SENSE+ 14
SENSE- 13
GND
8
GND
10
BG 21
INTVCC 22
SW 18
BOOST 20
TG 19
VBIAS 1
PGOOD
2
SS
12
RUN
11
GND
24
GND
25
ILIM
3
NC
6
NC
4
INTVCC
5
EXTVCC
23
OVMODE
17
R113
OPT
C31
15nF
Q20
BSC100N06LS3
3
2
1
4
5
R85
OPT
Q17
BSC100N06LS3
3
2
1
4
5
C15
1nF
C14
OPT
COUT14
15uF
100V
2220
R9
47K
COUT15
15uF
100V
2220
D8
1N4448HWT
R34
10
R112
0
R84
OPT
R51
OPT
CIN9
10uF
50V
1210
R111
OPT
CIN10
15uF
100V
2220
TP1
L5
10uH
SER2918H-103KL
RSNS5
0.004
2512
1%
R83
OPT
0805
R21 10
D5
BAS170W
12
R100
0
R25
10
R18
464k
1%
R82
0
Q18
BSC100N06LS3
3
2
1
4
5
COUT13
4.7uF
1210
100V
C25
1uF
R20
10K
5%
C37
0.1uF
50V
13
DEMO MANUAL DC2332A-A
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications
subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
ASSY
-A
-B
[1.] LT8551 MASTER / SLAVE
MASTER
SLAVE
ASSY
-A
-B
[2.]
R1
71.5K
OPT
R4
47K
OPT OPT
0 OHM
R6,R39,R40,R41 R8
20
0 OHM 0 OHM
OPT
C5
1nF
OPT OPT
10nF
C36
NOTES:
ASSY
-A
-B
[3.] LTC3769 PRIMARY CONTROLLER
COMPONENTS INSTALLED / REMOVED
INSTALLED
REMOVED
ASSY
-A
-B
[4.]
JP4 (STAGE SHED)
DISABLE
ENABLE
6. UNLESS OTHERWISE SPECIFIED,
ALL RESISTORS ARE 0603, 5%
AND ALL CAPACITORS ARE 0603.
400kHz
D6,D7
BAT46WJ
OPT
R31,R32,R33,R63,
R80,R95.R96,R97
OPTIONAL CIRCUIT
TO REDUCE POWER
DISSIPATION IN Q21
ASSY
-A
-B
[5.]
JP5 (SYNC)
GND
SYNC
WITH INTERNAL GATE DRIVERS
02-07-2018
VAUX
VIN VAUX
DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES.
APP ENG.
Phone: (408)432-1900
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND
SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
www.analog.com
SKU NO.
IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES
APPLICATIONS ENGINEERING FOR ASSISTANCE.
66
LT
VK
LT8551EUKG
MULTIPHASE BOOST CONVERTER EXPANDER
DC2332A(A,B)
710-DC2332A(A,B)_REV04
N/A DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES.
APP ENG.
Phone: (408)432-1900
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND
SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
www.analog.com
SKU NO.
IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES
APPLICATIONS ENGINEERING FOR ASSISTANCE.
66
LT
VK
LT8551EUKG
MULTIPHASE BOOST CONVERTER EXPANDER
DC2332A(A,B)
710-DC2332A(A,B)_REV04
N/A DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES.
APP ENG.
Phone: (408)432-1900
SIZE:
SCHEMATIC NO. AND REVISION:
CUSTOMER NOTICE
THIS CIRCUIT IS PROPRIETARY TO ANALOG DEVICES AND
SUPPLIED FOR USE WITH ANALOG DEVICES PARTS.
www.analog.com
SKU NO.
IC NO.
ANALOG DEVICES HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT ANALOG DEVICES
APPLICATIONS ENGINEERING FOR ASSISTANCE.
66
LT
VK
LT8551EUKG
MULTIPHASE BOOST CONVERTER EXPANDER
DC2332A(A,B)
710-DC2332A(A,B)_REV04
N/A
R29
1M
1%
C21
0.1uF
R120
OPT
R26
10K
C28
2.2uF
100V
1210
R61
1M
1%
C32
47uF
16V
1210
U3
LT8631EFE
INTVCC 16
VIN
1
NC 13
SYNC/MODE
7
BST 18
FB 11
IND 14
GND
21
RT
8
NC
9
NC 15
SW 20
PG
5
VOUT 12
EN/UV
3
NC
6
TR/SS
10
R28
162k
1%
C34
0.1uF
+
C16
10uF
100V
100CE10BS
C26
4.7pF
R27
25.5K
1%
C33
2.2uF
L6
22uH
7447779122
R54
OPT
C24
1uF
16V
R52
OPT
14
DEMO MANUAL DC2332A-A
Rev. 0
ANALOG DEVICES, INC. 2019
08/19
www.analog.com
ESD Caution
ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection
circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.
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