Linear ANALOG DEVICES DC2155A-A User manual

1
DEMO MANUAL
DC2155A-A/DC2155A-B
Rev. C
DESCRIPTION
LTC3886/LTC3870
60V Dual Output Step-Down DC/DC Controller
with Digital Power System Management
Demonstration circuit 2155A is available in two configura-
tions. The DC2155A-A is a dual output synchronous step-
down converter featuring the LTC
®
3886, a dual-phase
current mode controller. The DC2155A-B is a single output
synchronous step-down converter that operates with four
phases: two from the LTC3886 and two from LTC3870,
a phase extender. Both versions have a PMBus interface
and digital power system management functions.
The DC2155A uses discrete MOSFETs in the power stage.
The input range of this board is from 18V to 54V. The out-
put voltage can be programmed from 5V to 12V with an
output current of up to 12A per phase. For the DC2155A-A
version, the factory default setting for the CH0 output is
12V and CH1 output is 5V. In addition, this demo board
has an on-board dynamic load circuit, which makes it easy
to evaluate the transient performances.
The DC2155A powers up to default settings and produces
power based on configuration resistors or its program file
loaded within its onboard EEPROM without the need for
any serial bus communication. This allows easy evaluation
PERFORMANCE SUMMARY
of the DC/DC converter aspects of the LTC3886. To fully
explore the extensive power system management features
of the parts, download the GUI software LTpowerPlay
®
onto your PC and use LTC’s I2C/SMBus/PMBus Dongle
DC1613A to connect to the board. LTpowerPlay allows
the user to reconfigure the part on the fly and store the
configuration in EEPROM, view telemetry of voltage, cur-
rent, temperature and fault status.
GUI Software Download
The software can be downloaded from:
LTpowerPlay
For more details and instructions of LTpowerPlay, please
visit Help menu in LTpowerPlay.
Design files for this circuit board are available.
Specifications are at TA= 25°C
DC2155A-A Assembly (Dual Output, LTC3886 Only)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Supply Range 18 32 54 V
FSW Factory Default Switching Frequency 150 kHz
VOUT0 CH0 Factory Default Output Voltage IOUT0 = 0A to 12A, VIN = 18V to 54V 12 V
IOUT0 CH0 Output Current Range 0 12 A
EFF CH0 Efficiency VOUT0 = 12V, VIN = 32V, IOUT = 12A, See Figure6a 96.2 %
VOUT1 CH1 Factory Default Output Voltage IOUT1 = 0A to 12A, VIN = 18V to 54V 5 V
IOUT1 CH1 Output Current Range 0 12 A
EFF CH1 Efficiency VOUT1 = 5V, VIN = 32V, IOUT = 12A, See Figure6b 93.6 %
All registered trademarks and trademarks are the property of their respective owners.

2
DEMO MANUAL
DC2155A-A/DC2155A-B
Rev. C
PERFORMANCE SUMMARY
QUICK START PROCEDURE
Demonstration circuit 2155A makes it easy to set up
to evaluate the performances of the LTC3886. Refer to
Figure1andFigure2 for proper measurement equipment
setup and follow the procedure below:
NOTE. When measuring the input or output voltage ripple,
care must be taken to avoid a long ground lead on the
oscilloscope probe. Measure the output voltage ripple by
touching the probe tip directly across the C10 for CH0
and C26 for CH1. See Figure5 for proper scope probe
technique.
1. Make sure jumpers are in the following positions:
JUMPER POSITION FUNCTION
JP1 ON EXT 5V (on-board bias supply) for
EXTVCC and dynamic load circuit
JP2 NC for DC2155A-A;
C for DC2155A-B
FAULT0 to FAULT1
JP3 NC for DC2155A-A;
C for DC2155A-B
RUN0 to RUN1
JP5 INT External or on-board pulse generator
for transient circuit
JP6 OFF On-board pulse generator ON/OFF
2. With power off, connect the input power supply to VIN
and GND. Connect active load to output.
3. Make sure both RUN switches (SW1, SW2) are OFF.
4. Turn on the power at the input.
NOTE. Make sure that the input voltage does not
exceed 54V.
5. Turn on both SW1 (for RUN0), and SW2 (for RUN1)
switches, as desired.
6. Check for the correct output voltage from E5 to E6
for CH0, E7 to E8 for CH1. For DC2155A–A version,
VOUT0=12.0V±0.5% (11.94V ~ 12.06V), VOUT1=5V
±0.5% (4.975V ~ 5.025V). For DC2155A–B version,
VOUT0=12.0V ± 0.5% (11.94V ~ 12.06V).
NOTE. If there is no output, temporarily disconnect the
load to make sure that the load is not set too high.
7. Once the proper output voltage is established, adjust
the loads within the operating range and observe the
output voltage regulation, ripple voltage, efficiency and
other parameters.
8. Connect the dongle and control the output voltage from
the GUI. See “LTpowerPlay QUICK START”session for
details.
DC2155A-B Assembly (Four-Phase Single Output, LTC3886 and LTC3870)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Supply Range 18 32 54 V
VOUT0 Factory Default Output Voltage IOUT = 0A TO 48A, VIN = 18V to 54V 12 V
IOUT0 Output Current Range 0 48 A
FSW Factory Default Switching Frequency 150 kHz
EFF Efficiency VIN = 32V, VOUT = 12V, IOUT = 48A, See Figure7 96.9 %
Specifications are at TA= 25°C

3
DEMO MANUAL
DC2155A-A/DC2155A-B
Rev. C
Figure1. Test Setup for DC2155A-A
DC2155 F01
+
–
DC1613A
CONNECTOR
VOUT0
LOAD
SHUNT
+
–
VOUT1
LOAD SHUNT
–
+
+
–
RUN1
SWITCH 2
RUN0
SWITCH 1
12A MAX
12A MAX
+
–
+–
+
–
POWER
SUPPLY
1mΩ SHUNT
QUICK START PROCEDURE

4
DEMO MANUAL
DC2155A-A/DC2155A-B
Rev. C
QUICK START PROCEDURE
Figure2. Test Setup for DC2155A-B
DC2155 F01
+
–
+–
+
–
+
–
POWER
SUPPLY
1mΩ SHUNT
DC1613A
CONNECTOR
VOUT0
LOAD
SHUNT
+
–
VOUT1
LOAD SHUNT
–
+
RUN1
SWITCH 2
RUN0
SWITCH 1
36A MAX
12A MAX

5
DEMO MANUAL
DC2155A-A/DC2155A-B
Rev. C
QUICK START PROCEDURE
Figure3. Demo Setup with PC for DC2155A-A
Figure4. Demo Setup with PC for DC2155A-B
Connecting a PC to DC2155A
You can use a PC to reconfigure the power management
features of the LTC3886 such as:nominal VOUT, mar-
gin set points, OV/UV limits, temperature fault limits,
sequencing parameters, the fault log, fault responses,
GPIO and other functionality. The DC1613A dongle may
be plugged in regardless of whether or not VIN is present.
Dongle can be hot plugged.
VOUT0
VOUT1
12-PIN
CONNECTOR
USB CABLE
LOAD
LOAD
+48V
POWER SUPPLY
LTC3886
DEMO BOARD
DC2155A-A
USB TO
I2C/PMBus DONGLE
DC1613A
VOUT0
12-PIN
CONNECTOR
USB CABLE
+48V
POWER SUPPLY
LOAD
USB TO
I2C/PMBus DONGLE
DC1613A
LTC3886
DEMO BOARD
DC2155A-B

6
DEMO MANUAL
DC2155A-A/DC2155A-B
Rev. C
QUICK START PROCEDURE
Figure5. Measuring Output Voltage Ripple
Measuring Efficiency
To accurately measure efficiency of any configuration, do
the following:
n Set JP6 to OFF position to disable the pulse generator
circuits.
n
DC2155A-A version. Measure VIN across the input
ceramic capacitor (C7 for CH0, C21 for CH1). Measure
VOUT across the output ceramic capacitor (C10 for
CH0, C26 for CH1).
n
DC2155A-B version. Measure VIN across the input
ceramic capacitor C7. Measure V
OUT
across the output
ceramic capacitor C10.
Measuring Output Ripple Voltage
An accurate ripple measurement may be performed by
using the below configuration across C10/C26.
+ –
VOUT GND
COUT
(a) DC2155A-A: Efficiency at 12VOUT (b) DC2155A-A: Efficiency at 5VOUT
LOAD CURRENT (A)
ILOAD = 0A to 12A
fSW = 150kHz
EXTVCC = 12V (TIED TO VOUT)
ONE OUTPUT RAIL IS
ENABLED AT A TIME.
0
EFFICIENCY (%)
106
DC2155 F06a
84 11 122 95 731
100
98
96
94
92
88
86
84
82
80
90
18VIN
24VIN
32VIN
48VIN
LOAD CURRENT (A)
0
EFFICIENCY (%)
106
DC2155 F06b
84 11
12
2 95 731
ILOAD = 0A to 12A
fSW = 150kHz
EXTVCC = 5V (TIED TO VOUT)
ONE OUTPUT RAIL IS
ENABLED AT A TIME.
18VIN
24VIN
32VIN
48VIN
100
98
96
94
92
88
86
84
82
80
90
Figure6.

7
DEMO MANUAL
DC2155A-A/DC2155A-B
Rev. C
QUICK START PROCEDURE
100µs/DIV
VIN = 32V
VOUT0 = 12V
fSW = 150kHz
ILOAD STEP = 0A TO 6A AT 6A/µs
(DEFAULT SET-UP)
VOUT
2OOmV/DIV
IOUT
5A/DIV
DC2155 F08a
OA TO 6A
VO_P-P = 444mV
100µs/DIV
VIN = 32V
VOUT1 = 5V
fSW = 150kHz
ILOAD STEP = 0A TO 6A AT 6A/µs
(DEFAULT SET-UP)
VOUT
2OOmV/DIV
IOUT
5A/DIV
DC2155 F08b
OA TO 6A
VO_P-P = 438mV
(a) DC2155A-A Load Step Response, 12VOUT (b) DC2155A-A Load Step Response, 5VOUT
Figure7. DC2155A-B: Efficiency at 12VOUT
LOAD CURRENT (A)
0
EFFICIENCY (%)
100
98
96
94
92
88
86
84
82
80
90
DC2155 F07
48
24 4016 32 4420 361284 28
ILOAD = 0A to 48A
fSW = 150kHz
EXTVCC = 12V (TIED TO VOUT)
4-PHASE SINGLE OUTPUT
18VIN
24VIN
32VIN
48VIN
Figure8. DC2155A-A Load Step Response

8
DEMO MANUAL
DC2155A-A/DC2155A-B
Rev. C
TOP VIEW
VIN = 32V
VOUT0 = 12V AT 12A
VOUT1 = 5V AT 12A
fSW = 150kHz
EXTVCC = 12V (TIED TO VOUT)
TA= 25°C
NO FORCED AIRFLOW
(DEFAULT SET-UP)
DC2155 F10
BOTTOM VIEW
QUICK START PROCEDURE
Figure9. DC2155A-A Output Ripple Voltages
Figure10. DC2155A-A Thermal Performance
10µs/DIV
VIN = 32V
VOUT0 = 12V AT 12A
VOUT1 = 5V AT 12A
fSW = 150kHz
(DEFAULT SET-UP)
12VOUT
5OmV/DIV
AC-COUPLING
5VOUT
5OmV/DIV
AC-COUPLING
DC2155 F09
VO_P-P = 33mV
20MHz BWL
VO_P-P = 64mV

9
DEMO MANUAL
DC2155A-A/DC2155A-B
Rev. C
100µs/DIV
12VOUT
2OOmV/DIV
AC-COUPLING
IOUT
2OA/DIV
DC2155 F11
OA TO 24A
VIN = 32V
VOUT0 = VOUT1 = 12V
fSW = 150kHz
I
LOAD
STEP = 0A TO 24A AT 24A/µs (DEFAULT SET-UP)
20MHz BWL
VO_P-P = 413mV
50µs/DIV
12VOUT
2OmV/DIV
AC-COUPLING
DC2155 F12
VIN = 32V
VOUT0 = VOUT1 = 12V AT 48A
fSW = 150kHz
(DEFAULT SET-UP)
20MHz BWL
VO_P-P = 20mV
QUICK START PROCEDURE
Figure12. DC2155A-B Output Ripple VoltagesFigure11. DC2155A-B Load Step Response VIN = 32V
Figure13. DC2155A-B Thermal Performance
TOP VIEW
VIN = 32V
VOUT0 = VOUT1 = 12V AT 48A
fSW = 150kHz
LTC3886 EXTVCC = 12V (TIED TO VOUT0)
LTC3870 EXTVCC = 5V (TIED TO 5V ON-BOARD
EXTERNAL BIAS SUPPLY VOLTAGE FROM U3)
TA= 25°C
NO FORCED AIRFLOW
(DEFAULT SET-UP)
DC2155 F13
BOTTOM VIEW

10
DEMO MANUAL
DC2155A-A/DC2155A-B
Rev. C
LTpowerPlay is a powerful Windows based development
environment that supports Analog Devices power sys-
tem management ICs, including the LTC3880, LTC3883,
LTC3882, LTC3887 and LTC3886. The software supports
a variety of different tasks. You can use LTpowerPlay to
evaluate Analog Devices ICs by connecting to a demo
board system. LTpowerPlay can also be used in an offline
mode (with no hardware present) in order to build a mul-
tichip configuration file that can be saved and reloaded at
a later time. L
TpowerPlay provides unprecedented diag-
nostic and debug features. It becomes a valuable diag-
nostic tool during board bring-up to program or tweak the
power management scheme in a system, or to diagnose
power issues when bringing up rails. LTpowerPlay uti-
lizes the DC1613A USB-to-SMBus controller to commu-
nicate with one of many potential targets, including the
LTC3886’s DC2155A demo system, or a customer board.
The software also provides an automatic update feature
to keep the software current with the latest set of device
drivers and documentation. The LTpowerPlay software
can be downloaded from:
LTpowerPlay
To access technical support documents for LTC Digital
Power Products visit Help. View online help on the
LTpowerPlay menu.
LTpowerPlay SOFTWARE GUI
Figure14. LTpowerPlay Main Interface

11
DEMO MANUAL
DC2155A-A/DC2155A-B
Rev. C
The following procedure describes how to use LTpowerPlay
to monitor and change the settings of LTC3886.
1. Download and install the LTpowerPlay GUI:
LTpowerPlay
2. Launch the LTpowerPlay GUI.
a. The GUI should automatically identify the DC2155A.
The system tree on the left hand side should look like
this:
b. A blue message box shows for a few seconds in the
lower left hand corner, confirming that the LTC3886 is
communicating:
c. In the Toolbar, click the “R” (RAM to PC) icon to read
the RAM from the LTC3886. This reads the configura-
tion from the RAM of LTC3886 and loads it into the
GUI.
d. If you want to change the output voltage to a differ-
ent value, like 10V: in the Config tab, type in 10 in the
VOUT_COMMAND box, like this:
Then, click the “W” (PC to RAM) icon to write these
register values to the LTC3886. After finishing this
step, you will see the output voltage will change to 10V.
If the write is successful, you will see the following
message:
e. You can save the changes into the NVM. In the tool bar,
click “RAM to NVM” button, as following:
f. Save the demo board configuration to a (*.proj)
file. Click the Save icon and save the file with a new
filename.
LTpowerPlay QUICK START PROCEDURE

12
DEMO MANUAL
DC2155A-A/DC2155A-B
Rev. C
PARTS LIST
DC2155A-A
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 2 C1, C85 CAP, 56μF 20% 63V ELEC SUNCON 63HVP56M
2 3 C3, C9, C23 CAP, 0603 0.1μF 10% 100V X7R MURATA GRM188R72A104KA35D
3 4 C4, C5, C27, C33 CAP, 0603 10nF 10% 100V X7R MURATA GRM188R72A103KA01D
4 3 C6, C13, C28 CAP, 0603 1nF 10% 100V X7R AVX 06031C102KAT2A
5 5 C7, C8, C21, C22, C74 CAP, 1210 2.2μF 10% 100V X7R MURATA GRM32ER72A225KA35L
6 8 C10, C11, C12, C24, C25, C26, C88, C93 CAP, 1210 22μF 20% 16V X7R AVX 1210YC226MAT2A
7 4 C14, C15, C29, C30 CAP, 150μF 16V ELEC. OS-CON PANASONIC 16SVP150M
8 2 C18, C34 CAP, 0603 4.7nF 10% 50V X7R AVX 06035C472KAT2A
9 2 C20, C36 CAP, 0603 100pF 5% 50V C0G AVX 06035A101JAT2A
10 2 C37, C38 CAP, 0603 2.2μF 10% 16V X5R AVX 0603YD225KAT2A
11 1 C39 CAP, 0603 4.7μF 10% 10V X5R AVX 0603ZD475KAT2A
12 1 C40 CAP, 0603 4.7μF 10% 16V X5R MURATA GRM188R61C475KAAJD
13 2 C70, C103 CAP, 0805 2.2μF 10% 16V X7R AVX 0805YC225KAT2A
14 1 C72 CAP, 0603 47nF 10% 25V X7R AVX 06033C473KAT2A
15 1 C76 CAP, 0603 0.1μF 10% 25V X7R AVX 06033C104KAT2A
16 1 C78 CAP, 0805 220nF 10% 100V X7R MURATA GRM21AR72A224KAC5L
17 2 C79, C80 CAP, 1210 100μF 20% 10V X5R MURATA GRM32ER61A107ME20L
18 1 C81 CAP, 0603 220pF 10% 50V X7R AVX 06035C221KAT2A
19 2 C82, C83 CAP, 0603 10nF 10% 25V X7R AVX 06033C103KAT2A
20 2 C84, C101 CAP, 0603 100nF 20% 16V X7R AVX 0603YC104MAT2A
21 2 C94, C95 CAP, 1812 10μF 20% 100V X7S TDK CKG45NX7S2A106M500JH
22 2 C96, C97 CAP, 1206 2.2μF 10% 100V X7R MURATA GRM31CR72A225KA73L
23 1 C100 CAP, 0603 150pF 5% 50V NPO AVX 06035A151JAT2A
24 1 C102 CAP, 0603 1μF 20% 25V X5R AVX 06033D105MAT2A
25 2 D1, D2 DIODE, SCHOTTKY 100V, 1A DIODES/ZETEX, DFLS1100-7
26 4 D5, D6, D13, D14 LED, 0603 GREEN OSRAM LG L29K-G2J1-24-Z
27 1 D7 LED, 0603 RED OSRAM LS L29K-H1J2-1-Z
28 1 D15 DIODE, SCHOTTKY, 30V, 250mW, 100mA,
SOD-323
CENTRAL SEMI. CMDSH-3 TR
29 26 E1, E2, E3, E4, E5, E6, E7, E8, E11, E12,
E14, E16, E18, E20, E21, E22, E23, E24,
E25, E26, E27, E29, E30, E32, E35, E36
TURRET MILL-MAX 2501-2-00-80-00-00-07-0
30 2 L1, L2 IND, 8.6μH WURTH ELEKTRONIK 7443630860
31 1 L5 IND, 68μH SUMIDA CDRH105RNP-680NC
32 2 Q1, Q6 XSTR, MOSFET N-CH 60V 47A 8 PIN
PG-TDSON-8
INFINEON BSC094N06LS5
33 2 Q3, Q7 XSTR, MOSFET N-CH 60V 100A 8 PIN
PG-TDSON-8
INFINEON BSC027N06LS5
34 2 Q9, Q10 XSTR, PNP GENERAL PURPOSE SOT-323 DIODES INC. MMST3906-7-F
35 1 Q19 XSTR., MOSFET, N-CH, 40V, TO-252 (DPAK) VISHAY SUD50N04-8M8P-4GE3
36 1 Q20 XSTR, MOSFET P-CH 20V 5.2A SOT-23 VISHAY SI2365EDS-T1-GE3
37 4 Q22, Q23, Q28, Q29 XSTR, MOSFET N-CH 60V 115mA SOT23 FAIRCHILD 2N7002A

13
DEMO MANUAL
DC2155A-A/DC2155A-B
Rev. C
PARTS LIST
DC2155A-A
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
38 2 R2, R122 RES, 2512 0.006Ω 1% 1W PANASONIC ERJ-M1WSF6MU
39 2 R3, R4 RES, 0603 1k 5% 1/10W VISHAY CRCW06031K00JNEA
40 4 R9, R12, R30, R38 RES, 0603 2Ω 5% 1/10W VISHAY CRCW06032R00JNEA
41 12 R10, R11, R13, R15, R16, R18, R23, R25,
R28, R89, R112, R113
RES, 0603 10k 5% 1/10W VISHAY CRCW060310K0JNEA
42 2 R14, R37 RES, 2010 3mΩ 1% 1W VISHAY WSL20103L000FEA18
43 14 R17, R21, R22, R27, R43, R44, R45, R96,
R98, R106, R109, R128, R129, R132
RES, 0603 0Ω JUMPER VISHAY CRCW06030000Z0EA
44 5 R24, R26, R50, R51, R155 RES, 0603 100Ω 5% 1/10W VISHAY CRCW0603100RJNEA
45 4 R87, R88, R171, R172 RES, 0603 200Ω 5% 1/10W VISHAY CRCW0603200RJNEA
46 1 R91 RES, 2010 0.01Ω 1% 2W VISHAY WSL2010R0100FEK
47 1 R93 RES, 0603 127Ω 1% 1/10W VISHAY CRCW0603127RFKEA
48 1 R99 RES, 0603 220k 5% 1/10W VISHAY CRCW0603220KJNEA
49 2 R114, R115 RES, 0603 10Ω 5% 1/10W VISHAY CRCW060310R0JNEA
50 2 R119, R120 RES, 0603 4.99k 1% 1/10W VISHAY CRCW06034K99FKEA
51 2 R124, R125 RES, 2512 0Ω JUMPER VISHAY CRCW25120000Z0EG
52 1 R146 RES, 0805 4.7Ω 1% 0.125W VISHAY CRCW08054R70FKEA
53 1 R151 RES, 0603 1MΩ 5% 1/10W VISHAY CRCW06031M00JNEA
54 1 R152 RES, 0603 681k 1% 1/10W VISHAY CRCW0603681KFKEA
55 1 R153 RES, 0603 3.3Ω 1% 1/10W VISHAY CRCW06033R30FKEA
56 1 R154 RES, 0603 82.5Ω 1% 1/10W VISHAY CRCW060382R5FKEA
57 1 R157 RES, 0603 2Ω 5% 1/10W VISHAY CRCW06032R00JNEA
58 1 R158 RES, 0603 27.4k 1% 1/10W VISHAY CRCW060327K4FKEA
59 1 R159 RES, 0603 226K 1% 1/10W VISHAY CRCW0603226KFKEA
60 1 R160 RES, VARIABLE 5k BOURNS 3386P-1-502-LF
61 1 R161 RES, 0603 20k 5% 1/10W VISHAY CRCW060320K0JNEA
62 1 R162 RES, 1206 0Ω JUMPER VISHAY CRCW12060000Z0EA
63 1 R168 RES., 4.7Ω, 1%, 1/10W, 0603, AEC-Q200 VISHAY CRCW06034R70FKEA
64 1 R170 RES, 0603 340Ω 1% 1/10W VISHAY CRCW0603340RFKEA
65 1 U1 IC, 60V DUAL OUTPUT STEP-DOWN
CONTROLLER WITH DIGITAL POWER
SYSTEM MANAGEMENT
ANALOG DEVICES, INC.,
LTC3886IUKG#10E2-1PBF-ES
66 1 U3 IC, SYNCHRONUS STEP-DOWN
CONVERTER
ANALOG DEVICES, INC. LTC3630EMSE#PBF
67 1 U4 IC, 24LC025/ST MICROCHIP 24LC025-I/ST
Additional Demo Board Circuit Components
1 0 C16, C17, C31, C32, C51, C53, C65, C66 CAP, 7343 OPTION OPTION
2 0 C19, C35, C43, C44, C45, C49, C54, C55,
C56, C57, C60, C68, C69, C73
CAP, 0603 OPTION OPTION
3 0 C41, C42, C46, C47, C48, C58, C59, C61,
C62, C67, C75, C89, C90
CAP, 1210 OPTION OPTION
4 0 C50, C52, C63, C64 CAP, 16V ELEC. OPTION OPTION

14
DEMO MANUAL
DC2155A-A/DC2155A-B
Rev. C
PARTS LIST
DC2155A-A
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
5 0 C71, C77, C91, C92 CAP, 0805 OPTION OPTION
6 0 C86, C87 CAP, ELEC OPTION OPTION
7 0 C98, C99 CAP, 1206 OPTION OPTION
8 0 D3, D4, D9, D12 DIODE, OPTION OPTION
9 0 D8 DIODE, ZENER OPTION OPTION
10 0 L3, L4 IND, OPTION OPTION
11 0 L7, L9 IND, 6.8μH OPTION COILCRAFT SER2915H-682KL OPTION
12 0 Q27 XSTR, N-CHANNEL DMOS FET OPTION OPTION
13 0 R5, R6, R7, R8 RES, 2512 0Ω JUMPER OPTION RN5326 2512 TEPRO NAKOMA OPTION
14 0 Q2, Q4, Q5, Q8, Q11, Q12, Q13, Q14, Q15,
Q16, Q17, Q18
XSTR, OPTION OPTION
15 0 R19, R20, R29, R31, R32, R33, R34, R35,
R36, R39, R40, R41, R42, R46, R47, R48,
R49, R52, R53, R54, R55, R56, R57, R59,
R60, R61, R62, R63, R64, R65, R66, R67,
R68, R69, R71, R72, R73, R74, R75, R76,
R77, R78, R79, R80, R81, R82, R83, R97,
R100, R101, R102, R103, R104, R105,
R108, R110, R111, R116, R117, R118,
R121, R130, R131, R144, R145, R147,
R148, R169, R173, R174
RES, 0603 OPTION OPTION
16 0 R58, R70 RES, 2010 OPTION OPTION
17 0 R90, R92, R94, R95 RES, 0805 OPTION OPTION
18 0 R107 RES, 1206 OPTION OPTION
19 0 R163 RES, 1206 0Ω JUMPER OPTION VISHAY CRCW12060000Z0EA OPTION
20 0 U2 IC, POLYPHASE STEP-DOWN SLAVE
CONTROLLER OPTION
ANALOG DEVICES, INC., LTC3870EUFD#PBF
OPTION
Hardware:
1 5 JP1, JP2, JP3, JP5, JP6 HEADER, 3 PIN 2mm SULLINS NRPN031PAEN-RC
2 6 J1, J2, J3, J4, J5, J6 STUD, TESTPIN PEM KFH-032-10
3 2 J7, J12 CONN, BNC, 5 PINS CONNEX 112404
4 1 J9 HEADER, 14PIN DUAL ROW R/A MOLEX 87760-1416
5 1 J10 CONN, SOCKET 14PIN DUAL ROW R/A SULLINSINC. NPPN072FJFN-RC
6 1 J11 HEADER, 12PIN 2mm STR DL FCI 98414-G06-12ULF
7 6 J1, J2, J3, J4, J5, J6 LUG RING, #10 KEYSTONE 8205
8 4 MH1, MH2, MH3, MH4 STANDOFF, SNAP ON KEYSTONE_8831
9 12 J1, J2, J3, J4, J5, J6 NUT, BRASS 10-32 ANY #10-32
10 2 SW1, SW2 SWITCH, SUBMINATURE SLIDE C&K JS202011CQN
11 6 J1, J2, J3, J4, J5, J6 WASHER, #10 TIN PLATED BRASS ANY #10 EXT BZ TN
12 5 XJP1, XJP2, XJP3, XJP5, XJP6 SHUNT SAMTEC 2SN-BK-G

15
DEMO MANUAL
DC2155A-A/DC2155A-B
Rev. C
PARTS LIST
DC2155A-B
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 2 C1, C85 CAP, 56μF, ALUM. ELECT., 63V, 20%, SMD SUN ELECTRONIC INDUSTRIES CORP.
63HVP56M
2 6 C3, C9, C23, C44, C54, C60 CAP, 0603 0.1μF 10% 100V X7R MURATA GRM188R72A104KA35J
3 2 C4, C5 CAP, 0603 10nF 10% 100V X7R AVX 06031C103KAT2A
4 5 C6, C13, C28, C55, C68 CAP., 1000pF, X7R, 100V, 10%, 0603 AVX 06031C102KAT2A
5 9 C7, C8, C21, C22, C41, C42, C58, C59, C74 CAP, 1210 2.2μF 10% 100V X7R MURATA GRM32ER72A225KA35L
6 16 C10, C11, C12, C24, C25, C26, C46, C47, C48,
C61, C62, C67, C88, C89, C90, C93
CAP, 1210 22μF 20% 16V X7R MURATA GRM32ER71C226MEA8L
7 8 C14, C15, C29, C30, C50, C52, C63, C64 CAP, 150μF 16V ELEC. OS-CON PANASONIC 16SVP150M
8 1 C18 CAP, 0603 8.2nF 10% 50V X7R AVX 06035C822KAT2A
9 2 C20, C36 CAP, 0603 100pF 5% 50V C0G AVX 06035A101JAT2A
10 4 C27, C33, C82, C83 CAP, 0603 10nF 10% 25V X7R AVX 06033C103KAT2A
11 2 C37, C38 CAP, 0603 2.2μF 10% 16V X5R AVX 0603YD225KAT2A
12 2 C39, C45 CAP, 0603 4.7μF 10% 10V X5R AVX 0603ZD475KAT2A
13 2 C40, C43 CAP, 0603 4.7μF 10% 16V X5R MURATA GRM188R61C475KAAJD
14 2 C49, C57 CAP, 0603 10pF 5% 50V C0G AVX 06035A100JAT2A
15 2 C70, C103 CAP, 0805 2.2μF 10% 16V X7R AVX 0805YC225KAT2A
16 1 C72 CAP, 0603 47nF 10% 25V X7R AVX 06033C473KAT2A
17 1 C76 CAP, 0603 0.1μF 10% 25V X7R AVX 06033C104KAT2A
18 1 C78 CAP, 0805 220nF 10% 100V X7R MURATA GRM21AR72A224KAC5L
19 2 C79, C80 CAP, 1210 100μF 20% 10V X5R MURATA GRM32ER61A107ME20L
20 1 C81 CAP, 0603 220pF 10% 50V X7R AVX 06035C221KAT2A
21 2 C84, C101 CAP, 0603 100nF 20% 16V X7R AVX 0603YC104MAT2A
22 2 C94, C95 CAP, 1812 10μF 20% 100V X7S TDK CKG45NX7S2A106M500JH
23 4 C96, C97, C98, C99 CAP, 1206 2.2μF 10% 100V X7R MURATA GRM31CR72A225KA73L
24 1 C100 CAP, 0603 150pF 5% 50V NPO AVX 06035A151JAT2A
25 1 C102 CAP, 0603 1μF 20% 25V X5R AVX 06033D105MAT2A
26 4 D1, D2, D3, D4 DIODE, SCHOTTKY 100V, 1A DIODES/ZETEX, DFLS1100-7
27 4 D5, D6, D13, D14 LED, 0603 GREEN OSRAM LG L29K-G2J1-24-Z
28 1 D7 LED, 0603 RED OSRAM LS L29K-H1J2-1-Z
29 1 D15 DIODE, SCHOTTKY, 30V, 250mW,
100mA, SOD-323
CENTRAL SEMI. CMDSH-3 TR
30 4 L1, L2, L3, L4 IND, 8.6μH WURTH ELEKTRONIK 7443630860
31 1 L5 IND, 68μH SUMIDA CDRH105RNP-680NC
32 4 Q1, Q6, Q11, Q15 XSTR, MOSFET N-CH 60V 47A 8 PIN
PG-TDSON-8
INFINEON BSC094N06LS5
33 4 Q3, Q7, Q13, Q18 XSTR, MOSFET N-CH 60V 100A 8 PIN
PG-TDSON-8
INFINEON BSC027N06LS5
34 2 Q9, Q10 XSTR, PNP GENERAL PURPOSE
SOT-323
DIODES INC. MMST3906-7-F
35 1 Q19 XSTR, MOSFET, N-CH, 40V, TO-252 (DPAK) VISHAY SUD50N04-8M8P-4GE3

16
DEMO MANUAL
DC2155A-A/DC2155A-B
Rev. C
PARTS LIST
DC2155A-B
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
36 1 Q20 XSTR, MOSFET P-CH 20V 5.2A SOT-23 VISHAY SI2365EDS-T1-GE3
37 4 Q22, Q23, Q28, Q29 XSTR, MOSFET N-CH 60V 115mA SOT23 FAIRCHILD 2N7002A
38 2 R2, R122 RES, 2512 0.003Ω 1% 1W PANASONIC ERJ-M1WTF3M0U
39 2 R3, R4 RES, 0603 1k 5% 1/10W VISHAY CRCW06031K00JNEA
40 6 R5, R6, R7, R8, R124, R125 RES, 2512 0Ω JUMPER VISHAY CRCW25120000Z0EG
41 7 R9, R12, R30, R38, R52, R53, R67 RES, 0603 2Ω 5% 1/10W VISHAY CRCW06032R00JNEA
42 12 R10, R11, R13, R15, R16, R18, R23, R25,
R28, R89, R112, R113
RES, 0603 10k 5% 1/10W VISHAY CRCW060310K0JNEA
43 4 R14, R37, R58, R70 RES, 2010 3mΩ 1% 1W VISHAY WSL20103L000FEA18
44 35 R17, R21, R22, R27, R43, R44, R45, R56,
R57, R59, R60, R61, R62, R64, R66, R69,
R73, R74, R78, R80, R81, R96, R98, R106,
R109, R118, R121, R128, R129, R130, R131,
R132, R148, R173, R174
RES, 0603 0Ω JUMPER VISHAY CRCW06030000Z0EA
45 9 R24, R26, R50, R51, R63, R65, R75, R76,
R155
RES, 0603 100Ω 5% 1/10W VISHAY CRCW0603100RJNEA
46 1 R68 RES, 0603 49.9k 1% 1/10W VISHAY CRCW060349K9FKEA
47 4 R87, R88, R171, R172 RES, 0603 200Ω 5% 1/10W VISHAY CRCW0603200RJNEA
48 1 R91 RES, 2010 0.01Ω 1% 2W VISHAY WSLP2010R0100FEA
49 1 R93 RES, 0603 127Ω 1% 1/10W VISHAY CRCW0603127RFKEA
50 1 R99 RES, 0603 220k 5% 1/10W VISHAY CRCW0603220KJNEA
51 2 R114, R115 RES, 0603 10Ω 5% 1/10W VISHAY CRCW060310R0JNEA
52 2 R119, R120 RES, 0603 4.99k 1% 1/10W VISHAY CRCW06034K99FKEA
53 1 R146 RES, 0805 4.7Ω 1% 0.125W VISHAY CRCW08054R70FKEA
54 1 R151 RES, 0603 1MΩ 5% 1/10W VISHAY CRCW06031M00JNEA
55 1 R152 RES, 0603 681k 1% 1/10W VISHAY CRCW0603681KFKEA
56 1 R153 RES, 0603 3.3Ω 1% 1/10W VISHAY CRCW06033R30FKEA
57 1 R154 RES, 0603 82.5Ω 1% 1/10W VISHAY CRCW060382R5FKEA
58 1 R157 RES, 0603 2Ω 5% 1/10W VISHAY CRCW06032R00JNEA
59 1 R158 RES, 0603 27.4k 1% 1/10W VISHAY CRCW060327K4FKEA
60 1 R159 RES, 0603 226k 1% 1/10W VISHAY CRCW0603226KFKEA
61 1 R160 RES, VARIABLE 5k BOURNS 3386P-1-502-LF
62 1 R161 RES, 0603 20K 5% 1/10W VISHAY CRCW060320K0JNEA
63 2 R162, R163 RES, 1206 0Ω JUMPER VISHAY CRCW12060000Z0EA
64 1 R168 RES., 4.7Ω, 1%, 1/10W, 0603, AEC-Q200 VISHAY CRCW06034R70FKEA
65 1 R170 RES, 0603 340Ω 5% 1/10W VISHAY CRCW0603340RJNEA
66 1 U1 IC, 60V DUAL OUTPUT STEP-DOWN
CONTROLLER WITH DIGITAL POWER
SYSTEM MANAGEMENT
ANALOG DEVICES, INC.,
LTC3886IUKG#10E3-1PBF-ES
67 1 U2 IC, POLYPHASE STEP-DOWN SLAVE
CONTROLLER
ANALOG DEVICES, INC.,
LTC3870EUFD#PBF
68 1 U3 IC, SYNCHRONUS STEP-DOWN
CONVERTER
ANALOG DEVICES, INC.,
LTC3630EMSE#PBF
69 1 U4 IC, 24LC025-I/ST MICROCHIP 24LC025-I/ST
70 1 U5 IC, LTC6992IS6-1 ANALOG DEVICES, INC. LTC6992IS6-1

17
DEMO MANUAL
DC2155A-A/DC2155A-B
Rev. C
PARTS LIST
DC2155A-B
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
71 1 U6 IC, SINGLE OP AMP ANALOG DEVICES, INC., LT1803IS5
Additional Demo Board Circuit Components
1 0 C16, C17, C31, C32, C51, C53, C65, C66 CAP, 7343 OPTION OPTION
2 0 C19, C34, C35, C56, C69, C73 CAP, 0603 OPTION OPTION
3 0 C71, C77, C91, C92 CAP, 0805 OPTION OPTION
4 0 C75 CAP, 1210 OPTION OPTION
5 0 C86, C87 CAP, ELEC OPTION OPTION
6 0 D8 DIODE, ZENER OPTION OPTION
7 0 D9, D12 DIODE, OPTION OPTION
8 0 L7, L9, L10, L11 IND, 6.8μH OPTION COILCRAFT SER2915H-682KLOPTION
COILCRAFTSER2918H-682KL OPTION
9 0 Q2, Q4, Q5, Q8, Q12, Q14, Q16, Q17 XSTR, OPTION OPTION
10 0 Q27 XSTR, N-CHANNEL DMOS FET OPTION OPTION
11 0 R19, R20, R29, R31, R32, R33, R34, R35,
R36, R39, R40, R41, R42, R46, R47, R48,
R49, R54, R55, R71, R72, R77, R79, R82,
R83, R97, R100, R101, R102, R103, R104,
R105, R108, R110, R111, R116, R117, R144,
R145, R147, R169
RES, 0603 OPTION OPTION
12 0 R90, R92, R94, R95 RES, 0805 OPTION OPTION
13 0 R107 RES, 1206 OPTION OPTION
Hardware:
1 26 E1, E2, E3, E4, E5, E6, E7, E8, E11, E12, E14,
E16, E18, E20, E21, E22, E23, E24, E25, E26,
E27, E29, E30, E32, E35, E36
TURRET MILL-MAX 2501-2-00-80-00-00-07-0
2 4 MH1, MH2, MH3, MH4 STANDOFF, SNAP ON KEYSTONE_8831
3 12 J1, J2, J3, J4, J5, J6 NUT, BRASS 10-32 ANY #10-32
4 6 J1, J2, J3, J4, J5, J6 WASHER, #10 TIN PLATED BRASS ANY #10 EXT BZ TN
5 5 JP1, JP2, JP3, JP5, JP6 HEADER, 3 PIN 2mm SULLINS NRPN031PAEN-RC
6 6 J1, J2, J3, J4, J5, J6 STUD, TESTPIN PEM KFH-032-10
7 2 J7, J12 CONN, BNC, 5 PINS CONNEX 112404
8 1 J9 HEADER, 14PIN DUAL ROW R/A MOLEX 87760-1416
9 1 J10 CONN, SOCKET 14PIN DUAL ROW R/A SULLINS INC. NPPN072FJFN-RC
10 1 J11 HEADER, 12PIN 2mm STR DL FCI 98414-G06-12ULF
11 6 J1, J2, J3, J4, J5, J6 LUG RING, #10 KEYSTONE 8205
12 2 SW1, SW2 SWITCH, SUBMINATURE SLIDE C&K JS202011CQN
13 5 XJP1, XJP2, XJP3, XJP5, XJP6 SHUNT SAMTEC 2SN-BK-G

18
DEMO MANUAL
DC2155A-A/DC2155A-B
Rev. C
SCHEMATIC DIAGRAM
Figure 15a. DC2155A-A Demo Circuit Schematic, Sheet 1
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
OPT 0
16V
100
16V
100
2010
OPT
0
100
100
OPT
1nF
OPT 0
16V
OPT
3m
1. ALL RESISTORS AND CAPACITORS ARE 0603.
NOTE: UNLESS OTHERWISE SPECIFIED
OPT
1nF
0
OS-CON OS-CON
7343 7343
OS-CON 7343 7343
OPT
16V 16V
OPT
16V
OS-CON
OPT
16V
OPT
2010
3m
G L
REVISION HISTORY
5
REV DATEECO APPROVEDDESCRIPTION
09/06/19
PROD
INTVCC
VDD25
VIN
VOUT1
VIN_PWR
VOUT0
VIN_PWR
VDD25
VOUT0
VOUT1
VIN1
VIN_PWR
VDD33
VOUT0
VOUT1
VOUT0
VDD33
VSENSE0+
SW1A
FAULT1B
RUN0
ITH0
RUN1
SCL
VSENSE0-
PG0 PG1
SDA
ALERTB
SHARE_CLK
FAULT0B FAULT1B
VSENSE0+
FAULT0B
SYNC
PG0
PG1ITH1 VSENSE1
SW0
ITH0
SW1
SW0A
DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES. APP ENG.
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.
14
M I
G L
LTC3886IUKG
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
DC2155A-A 710-DC2155A-A_REV05
N/A
WITH POWER SYSTEM MANAGEMENT
Monday, September 09, 2019
DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES. APP ENG.
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.
14
M I
G L
LTC3886IUKG
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
DC2155A-A 710-DC2155A-A_REV05
N/A
WITH POWER SYSTEM MANAGEMENT
Monday, September 09, 2019
DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES. APP ENG.
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.
14
M I
G L
LTC3886IUKG
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
DC2155A-A 710-DC2155A-A_REV05
N/A
WITH POWER SYSTEM MANAGEMENT
Monday, September 09, 2019
J2
GND
C27
10nF
C9 0.1uF
R20
E11
FAULT0B
R9 2
R34 OPT
C25
22uF
R42
R51
E8
GND
E6
GND_SNS
E36
PG1
+
C14
150uF
C4
10nF
+
C1
56uF
63V
R32 OPT
R148 OPT
E1
GND
R48 OPT R16 10K
R26
C38
2.2uF
C23 0.1uF
C88
22uF
16V
R46 OPT
R18 10K
R128 0
C22 2.2uF
1210
J1
VIN
18V - 54V
C39
4.7uF
C21 2.2uF
1210
R49 OPT
C71 OPT
0805
Q3
BSC027N06LS5
1
2
5
3
4
R11 10K
E3
VIN
Q6
BSC094N06LS5
1
2
5
3
4
R41 OPT
Q1
BSC094N06LS5
1
2
5
3
4
R39 OPT
E4
GND
J6
GND
C96 2.2uF
1206
R38 2
J5
VOUT1
5V / 12A
R15 10K
C33
10nF
C20
100pF
C7 2.2uF
1210
U1
LTC3886IUKG
SW0 1
TG0 2
NC 3
ISENSE0+ 4
ISENSE0- 5
TSNS0
6
VSENSE0+ 7
VSENSE0- 8
ISENSE1+ 9
ISENSE1- 10
11
ITHR0
ITH0 12
SYNC
13
SCL
14
SDA
15
ALERTB
16
FAULT0
17
FAULT1
18
RUN0
19
RUN1
20
ASEL0
21
ASEL1
22
VOUT0_CFG
23
VOUT1_CFG
24
FREQ_CFG
25
PHAS_CFG
26
VDD25
27
WP
28
SHARE_CLK
29
VDD33
30
ITH1 31
ITHR1 32
PGOOD1
33
PGOOD0
34
VSENSE1+ 35
TSNS1
36
NC 37
TG1 38
SW1 39
BOOST1 40
NC 41
BG1 42
EXTVCC
43
INTVCC
44
VIN 48
IINP 47
IIINM 46
NC 45 NC 49
BG0 50
NC 51
BOOST0 52
Q5 (OPT)
1
2
5
3
4
E2
INTVCC
Q4
(OPT)
1
2
5
3
4
R40 OPT
R3 1k
R25 10K
C40
4.7uF
16V
R13 10K
J4
GND
C18
4.7nF
R4 1k
R30 2
C10 22uF
R43
+
C87
OPT
R24
R23 10K
R27 0
R28 10K
+
C86
OPT
C13
C12
22uF
16V
R36 OPT
R12 2
Q2
(OPT)
1
2
5
3
4
R37
C35
R10 10K
C36
100pF
C77 OPT
0805
R5 OPT 2512
R29 OPT
R90 OPT 0805
+
C17
330uF
R44
R35 OPT
R47
C93 22uF
16V
+
C30 150uF
R14
R22
R92 OPT
0805
C19
C34 4.7nF
E22
FAULT1B
E35
PG0
L2
8.6uH
7443630860
+
C16
330uF
R6 OPT 2512
R8 OPT 2512
R21
C94 10uF
R122 0.006
2512
1%
C28
D15
CMDSH-3
E7
VOUT1_SNS
C24
22uF
16V
Q7
BSC027N06LS5
1
2
5
3
4
R121 OPT
R7 OPT 2512
C5
10nF
Q8
(OPT)
1
2
5
3
4
R124 0 2512
Q10
R19
D2
21
Q9
+
C29 150uF
C95 10uF
R168 4.7
+
C85
56uF
63V
R118 OPT
R17 0
C37
2.2uF
D1
21
R2 0.006
2512
1% R125
0 2512
C26
22uF
C97 2.2uF
1206
C11 22uF
16V
+
C32 330uF
R173
OPT
C3
0.1uF
L1
8.6uH
7443630860
R33 OPT
R169 OPT
E5
VOUT0_SNS
J3
VOUT0
12V / 12A
R45 0
C6
1nF
C8 2.2uF
1210
R129 0
R50
R31 OPT
+
C15 150uF
+
C31
330uF
TSNS1
INTVCC
WP
SW1
ITHR0
ITHR0
ITHR1
TG0SYNC
TSNS0
RUN0
SCL
ITH0 ITHR1
SDA
ITH1
ALERTB
RUN1
SHARE_CLK
PG0
BG1
PG1
VSENSE0- ISENSE1+ TG1 VSENSE0+ BOOST0 SW0 BG0 ISENSE0+ ISENSE0- VSENSE1
FAULT0B
ISENSE1-
FAULT1B
BOOST1

19
DEMO MANUAL
DC2155A-A/DC2155A-B
Rev. C
SCHEMATIC DIAGRAM
Figure 15b. DC2155A-A Demo Circuit Schematic, Sheet 2
5 5
4 4
3 3
2 2
1 1
D D C C B B A A
16V 16V 1210
16V 16V
16V
16V 16V 1210
16V
ALL PARTS ON THIS PAGE ARE, NOT STUFFED IN THE -A VERSION
INTVCC_2
EXTVCC
INTVCC_2
INTVCC_2
VIN1
VIN1
INTVCC_2
INTVCC_2
INTVCC_2
VOUT0
VOUT0
VIN_PWR
RUN0
ITH0
FAULT0B
ITH0
PG0
SYN C
RUN0
FAULT0B
EXTVCC
SW2
SW2A
SW3
SW3A
DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES. APP ENG.
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.
24
M I
G L
LTC3886IUKG
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
DC2155A-A 710-DC2155A-A_REV05
N/A
WITH POWER SYSTEM MANAGEMENT
Monday, September 09, 2019
DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES. APP ENG.
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.
24
M I
G L
LTC3886IUKG
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
DC2155A-A 710-DC2155A-A_REV05
N/A
WITH POWER SYSTEM MANAGEMENT
Monday, September 09, 2019
DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES. APP ENG.
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.
24
M I
G L
LTC3886IUKG
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
DC2155A-A 710-DC2155A-A_REV05
N/A
WITH POWER SYSTEM MANAGEMENT
Monday, September 09, 2019
+
C65
OPT
7343
R56 OPT
R67 OPT
Q13
OPT
2
4
5
3
1
U2
OPT
ITH0
28
ISENSE0+ 2
ISENSE0- 3
FREQ
27
MODE0
1
RUN0
4
RUN1
5
MODE1
8
SYNC
11
FAULT0
26
EXTVCC 18
INTVCC 17
PGND
19
VIN 20
BG0 21
BOOST0 22
TG0 24
SW0 23
ILIM
10
GND
29
PHASMD
12
TG1 13
BOOST1 15
SW1 14
BG1 16
ISENSE1+ 7
ISENSE1- 6
ITH1
9
FAULT1
25
C98 OPT 1206
R66
OPT
+
C53
OPT
7343
Q14
OPT
2
4
5
3
1
Q17
OPT
2
4
5
3
1
C99 OPT 1206
R54
OPT
C62
OPT
R52
OPT
C58 OPT
1210
R81
OPT
C46
OPT
R62
OPT
R130 OPT
R131 OPT
C43
OPT
16V
+
C66
OPT
7343
R71 OPT
+
C63
OPT
C61
OPT
C57 OPT
Q16 OPT
2
4
5
3
1
C42
OPT
1210
Q12
OPT
2
4
5
3
1
C68
OPT
R64
OPT
C48
OPT
C90
OPT
D3 OPT
21
R77
OPT
R95
OPT 0805
C47
OPT
R79
OPT
+
C50
OPT
R55
OPT
R63 OPT
R82
OPT
R58 OPT
2010
R61
OPT
C55
OPT
R74 OPT
R70 OPT
2010
R73
OPT
C91 OPT
0805
R59
OPT R53
OPT
R60 OPT
C92 OPT
0805
R57
OPT
R83
OPT
R80
OPT
C89
OPT 1210
C60
OPT
L4 OPT
+
C51
OPT
7343
C59
OPT
1210
R65 OPT
D4 OPT
1 2
C69 OPT
Q15 OPT
2
4
5
3
1
Q18
OPT
2
4
5
3
1
C54
OPT
R76 OPT
R68
OPT
C44
OPT
Q11 OPT
2
4
5
3
1
R75 OPT
+
C52
OPT
R78
OPT
C67
OPT
E12
MODE0
+
C64
OPT
L3 OPT
C56 OPT
C41 OPT
1210
R94
OPT 0805
C49 OPT
R69
OPT
C45
OPT
R72
OPT
MODE0 ILIM
PHASMD
PHASMD
MODE0 MODE0 ILIM

20
DEMO MANUAL
DC2155A-A/DC2155A-B
Rev. C
SCHEMATIC DIAGRAM
Figure 15c. DC2155A-A Demo Circuit Schematic, Sheet 3
5
5
4
4
3
3
2
2
1
1
D D C C B B A A
VOUT1
NOTE: PULSE OUT 10mV / AMP
DYNAMIC LOAD CIRCUIT
DO NOT EXCEED 5% DUTY CYCLE!
ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN
VOUT0
ALERTB
PG0
PG1
FAULT0B FAULT1B
VOUT1
VOUT0 VOUT1
EXTVCC
VIN
VOUT0
+5V
VIN
+5V
+5V
VIN
3V3 VDD33
3V3
3V3
3V3
3V33V3
EXTVCC
PG1
ALERTB
PG0
FAULT1B
FAULT0B
DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES. APP ENG.
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.
34
M I
G L
LTC3886IUKG
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
DC2155A-A 710-DC2155A-A_REV05
N/A
WITH POWER SYSTEM MANAGEMENT
Monday, September 09, 2019
DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES. APP ENG.
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.
34
M I
G L
LTC3886IUKG
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
DC2155A-A 710-DC2155A-A_REV05
N/A
WITH POWER SYSTEM MANAGEMENT
Monday, September 09, 2019
DATE:
SHEET OF
TITLE: SCHEMATIC
APPROVALS
PCB DES. APP ENG.
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.
34
M I
G L
LTC3886IUKG
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
DC2155A-A 710-DC2155A-A_REV05
N/A
WITH POWER SYSTEM MANAGEMENT
Monday, September 09, 2019
C72 47nF
R132 0
R87 200
E14
PULSE IN
J7
1
2
3
4
5
R153 3.3 1%
E16
IOUT TST
JP5
INT EXT
PULSE
1 3
2
J12
1
2
3
4
5
R91
0.01
1%
2010
R147
OPT
R158
27.4k
1%
D13 GREEN
R162
0
1206
R174
OPT
R154
82.5 1%
Q22
2N7002A
2 3
1
R146 4.7 0805 1%
R98 0
C74
2.2uF
100V
1210
C101 100nF
D14 GREEN
C81 220pF
Q19 SUD50N04-8m8P
2
1
3
R99 220k
R144 OPT
R163 OPT 1206
E18
GND
R155
100
C100 150pF
C73 OPT
R100 OPT
D8
OPT
R159
226k 1%
Q20 SI2365EDS-T1-GE3
23
1
R96 0
C80 100uF 10V 1210
U6 LT1803IS5
VOUT 1
V-
2
+IN
3-IN 4
V+
5
Q27
OPT
23
1
Q28
2N7002A
2 3
1
L5
68uH
SUMIDA CDRH105RNP-680NC
Q23
2N7002A
2 3
1
R170
340
R145 OPT
R97 OPT
R160 5K
U3
LTC3630EMSE
SW 1
GND
14
VPRG1 7
GND
8
VPRG2 6
VIN
3
RUN
5
FBO
12
VFB 9
SS 10
ISET
11
GND
16
GND
17
Q29
2N7002A
2 3
1
R151 1M
R157
2
C79 100uF 10V 1210
R89 10K
C102 1.0uF
C70 2.2uF 0805
D5 GREEN
E20
EXTVCC
R88 200
R171 200
U5 LTC6992IS6-1
MOD
1
GND
2
SET
3DIV 4
V+ 5
OUT 6
E21
GND
C75 OPT 1210
D7 RED
R161 20K
JP6
OFF ON
PULSE GEN
13
2
C78 220nF 100V 0805
D6 GREEN
C103 2.2uF 0805
R152 681K
1%
R93 127
R172 200
JP1
ON OFF
EXT 5V
13
2
C76 0.1uF
R101 OPT
VIN
EXT_SUPPLY
EXT_SUPPLY