DC2155A - Demo Manual

DEMO MANUAL
DC2155A-A/DC2155A-B
LTC3886IUKG/LTC3870EUFD
60V Dual Output Step-Down DC/DC Controller
with Digital Power System Management
DESCRIPTION
Demonstration circuit 2155A is available in two configurations. The DC2155A-A is a dual output synchronous
step-down converter featuring the LTC®3886IUKG, 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 LTC3886IUKG
and two from LTC3870EUFD, a phase extender. Both versions have a PMBus interface and digital power system
management functions.
any serial bus communication. This allows easy evaluation
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, current, temperature and fault status.
The DC2155A uses discrete MOSFETs in the power stage.
The input range of this board is from 18V to 54V. The
output 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.
GUI Software Download
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
PERFORMANCE SUMMARY
The software can be downloaded from:
http://www.linear.com/ltpowerplay
For more details and instructions of LTpowerPlay, please
refer to “LTpowerPlay for LTC3880 Quick Start Guide”.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2155A
L, LT, LTC, LTM, Linear Technology, the Linear logo and LTpowerPlay are registered
trademarks of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
Specifications are at TA = 25°C
DC2155A-A Assembly (Dual Output, LTC3886 Only)
SYMBOL
PARAMETER
CONDITIONS
VIN
Input Supply Range
FSW
Factory Default Switching Frequency
VOUT0
CH0 Factory Default Output Voltage
IOUT0
CH0 Output Current Range
EFF
CH0 Efficiency
VOUT0 = 12V, VIN = 32V, IOUT = 12A, See Figure 6a
VOUT1
CH1 Factory Default Output Voltage
IOUT1 = 0A to 12A, VIN = 18V to 54V
IOUT1
CH1 Output Current Range
EFF
CH1 Efficiency
MIN
TYP
MAX
18
32
54
IOUT0 = 0A to 12A, VIN = 18V to 54V
V
150
kHz
12
V
0
12
A
96.3
%
5
V
0
VOUT1 = 5V, VIN = 32V, IOUT = 12A, See Figure 6b
UNITS
12
93.6
A
%
dc2155afb
1
DEMO MANUAL
DC2155A-A/DC2155A-B
PERFORMANCE SUMMARY
Specifications are at TA = 25°C
DC2155A-B Assembly (Four-Phase Single Output, LTC3886 and LTC3870)
SYMBOL
PARAMETER
CONDITIONS
VIN
Input Supply Range
VOUT0
Factory Default Output Voltage
IOUT0
Output Current Range
FSW
Factory Default Switching Frequency
EFF
Efficiency
MIN
TYP
MAX
18
32
54
IOUT = 0A TO 48A, VIN = 18V to 54V
12
0
VIN = 32V, VOUT = 12V, IOUT = 48A, See Figure 7
UNITS
V
V
48
A
150
kHz
96.6
%
QUICK START PROCEDURE
Demonstration circuit 2155A makes it easy to set up
to evaluate the performances of the LTC3886. Refer to
Figures 1 and 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; FAULT0 to FAULT1
C for DC2155A-B
JP3
NC for DC2155A-A; RUN0 to RUN1
C for DC2155A-B
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.
2
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.
dc2155afb
DEMO MANUAL
DC2155A-A/DC2155A-B
QUICK START PROCEDURE
–
RUN0
SWITCH 1
+
VOUT0
LOAD
SHUNT
12A MAX
+
+
+
–
–
–
DC1613A
CONNECTOR
1mΩ SHUNT
+
–
POWER
SUPPLY
–
+
RUN1
SWITCH 2
12A MAX
VOUT1
LOAD
DC2155 F01
+
–
SHUNT
Figure 1. Test Setup for DC2155A-A
dc2155afb
3
DEMO MANUAL
DC2155A-A/DC2155A-B
QUICK START PROCEDURE
–
RUN0
SWITCH 1
+
VOUT0
LOAD
SHUNT
36A MAX
+
+
+
–
–
–
DC1613A
CONNECTOR
1mΩ SHUNT
+
–
POWER
SUPPLY
RUN1
SWITCH 2
12A MAX
VOUT1
LOAD
DC2155 F01
+
–
SHUNT
Figure 2. Test Setup for DC2155A-B
4
dc2155afb
DEMO MANUAL
DC2155A-A/DC2155A-B
QUICK START PROCEDURE
Connecting a PC to DC2155A
You can use a PC to reconfigure the power management
features of the LTC3886 such as: nominal VOUT, margin
set points, OV/UV limits, temperature fault limits, sequenc-
ing 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.
+48V
POWER SUPPLY
USB CABLE
USB TO
I2C/PMBus DONGLE
DC1613A
12-PIN
CONNECTOR
VOUT0
LTC3886
DEMO BOARD
DC2155A-A
LOAD
VOUT1
LOAD
Figure 3. Demo Setup with PC for DC2155A-A
+48V
POWER SUPPLY
USB CABLE
USB TO
I2C/PMBus DONGLE
DC1613A
12-PIN
CONNECTOR
LTC3886
DEMO BOARD
DC2155A-B
VOUT0
LOAD
Figure 4. Demo Setup with PC for DC2155A-B
dc2155afb
5
DEMO MANUAL
DC2155A-A/DC2155A-B
QUICK START PROCEDURE
Measuring Efficiency
n
To accurately measure efficiency of any configuration, do
the following:
n
n
Set JP6 to OFF position to disable the pulse generator
circuits.
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).
+
VOUT
DC2155A-B version. Measure VIN across the input
ceramic capacitor C7. Measure VOUT 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.
–
COUT
GND
100
100
98
98
96
96
94
94
EFFICIENCY (%)
EFFICIENCY (%)
Figure 5. Measuring Output Voltage Ripple
92
90
88
86
18VIN
24VIN
32VIN
48VIN
84
82
80
0
1
2
3
4 5 6 7 8 9 10 11 12
LOAD CURRENT (A)
ILOAD = 0A to 12A
fSW = 150kHz
EXTVCC = 12V (TIED TO VOUT)
ONE OUTPUT RAIL IS
ENABLED AT A TIME.
DC2155 F06a
Figure 6a. DC2155A-A: Efficiency at 12VOUT
6
92
90
88
86
18VIN
24VIN
32VIN
48VIN
84
82
80
0
1
2
3
4 5 6 7 8 9 10 11 12
LOAD CURRENT (A)
ILOAD = 0A to 12A
fSW = 150kHz
EXTVCC = 5V (TIED TO VOUT)
ONE OUTPUT RAIL IS
ENABLED AT A TIME.
DC2155 F06b
Figure 6b. DC2155A-A: Efficiency at 5VOUT
dc2155afb
DEMO MANUAL
DC2155A-A/DC2155A-B
QUICK START PROCEDURE
100
98
EFFICIENCY (%)
96
94
92
90
88
86
18VIN
24VIN
32VIN
48VIN
84
82
80
0
4
8 12 16 20 24 28 32 36 40 44 48
LOAD CURRENT (A)
ILOAD = 0A to 48A
fSW = 150kHz
EXTVCC = 12V (TIED TO VOUT)
4-PHASE SINGLE OUTPUT
DC2155 F07
Figure 7. DC2155A-B: Efficiency at 12VOUT
VO_P-P = 444mV
VOUT
2OOmV/DIV
VO_P-P = 438mV
VOUT
2OOmV/DIV
IOUT
5A/DIV
OA TO 6A
100µs/DIV
VIN = 32V
VOUT0 = 12V
fSW = 150kHz
ILOAD STEP = 0A TO 6A AT 6A/µs
(DEFAULT SET-UP)
Figure 8a. DC2155A-A Load Step Response
IOUT
5A/DIV
OA TO 6A
DC2155 F08a
100µs/DIV
DC2155 F08b
VIN = 32V
VOUT1 = 5V
fSW = 150kHz
ILOAD STEP = 0A TO 6A AT 6A/µs
(DEFAULT SET-UP)
Figure 8b. DC2155A-A Load Step Response
dc2155afb
7
DEMO MANUAL
DC2155A-A/DC2155A-B
QUICK START PROCEDURE
20MHz BWL
VO_P-P = 53mV
12VOUT
5OmV/DIV
AC-COUPLING
5VOUT
5OmV/DIV
AC-COUPLING
VO_P-P = 31mV
10µs/DIV
DC2155 F09
VIN = 32V
VOUT0 = 12V AT 12A
VOUT1 = 5V AT 12A
fSW = 150kHz
(DEFAULT SET-UP)
Figure 9. DC2155A-A Output Ripple Voltages
DC2155 F10
TOP VIEW
BOTTOM 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)
Figure 10. DC2155A-A Thermal Performance
8
dc2155afb
DEMO MANUAL
DC2155A-A/DC2155A-B
QUICK START PROCEDURE
20MHz BWL
VO_P-P = 388mV
20MHz BWL
VO_P-P = 17.5mV
12VOUT
2OmV/DIV
AC-COUPLING
12VOUT
2OOmV/DIV
AC-COUPLING
OA TO 24A
IOUT
2OA/DIV
DC2155 F11
100µs/DIV
10µs/DIV
DC2155 F12
VIN = 32V
VOUT0 = VOUT1 = 12V AT 48A
fSW = 150kHz
(DEFAULT SET-UP)
VIN = 32V
VOUT0 = VOUT1 = 12V
fSW = 150kHz
ILOAD STEP = 0A TO 24A AT 24A/µs (DEFAULT SET-UP)
Figure 11. DC2155A-B Load Step Response VIN = 32V
Figure 12. DC2155A-B Output Ripple Voltages
DC2155 F13
TOP VIEW
BOTTOM 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)
Figure 13. DC2155A-B Thermal Performance
dc2155afb
9
DEMO MANUAL
DC2155A-A/DC2155A-B
LTpowerPlay SOFTWARE GUI
LTpowerPlay is a powerful Windows based development
environment that supports Linear Technology power system management ICs, including the LTC3880, LTC3883,
LTC3882, LTC3887 and LTC3886. The software supports
a variety of different tasks. You can use LTpowerPlay to
evaluate Linear Technology 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 multichip configuration file that can be saved and reloaded at a
later time. LTpowerPlay provides unprecedented diagnostic
and debug features. It becomes a valuable diagnostic 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 utilizes the
DC1613A USB-to-SMBus controller to communicate 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:
http://www.linear.com/ltpowerplay
To access technical support documents for LTC Digital
Power Products visit Help. View online help on the LTpowerPlay menu.
Figure 14. LTpowerPlay Main Interface
10
dc2155afb
DEMO MANUAL
DC2155A-A/DC2155A-B
LTpowerPlay QUICK START PROCEDURE
The following procedure describes how to use LTpowerPlay
to monitor and change the settings of LTC3886.
1. Download and install the LTpowerPlay GUI:
d. If you want to change the output voltage to a different value, like 10V: in the Config tab, type in 10 in the
VOUT_COMMAND box, like this:
http://www.linear.com/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:
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.
c. In the Toolbar, click the “R” (RAM to PC) icon to read
the RAM from the LTC3886. This reads the configuration
from the RAM of LTC3886 and loads it into the GUI.
If the write is successful, you will see the following
message:
dc2155afb
11
DEMO MANUAL
DC2155A-A/DC2155A-B
LTpowerPlay QUICK START PROCEDURE
e. You can save the changes into the NVM. In the tool
bar, click “RAM to NVM” button, as following:
PARTS LIST
ITEM
QTY
f. Save the demo board configuration to a (*.proj) file. Click
the Save icon and save the file with a new file name.
DC2155A-A
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
DC2155A-A 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
1
C6
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
2
C13, C28
CAP, 0603 1nF 10% 16V X7R
AVX 0603YC102KAT2A
8
4
C14, C15, C29, C30
CAP, 150µF 16V ELEC. OS-CON
PANASONIC 16SVP150M
9
2
C18, C34
CAP, 0603 4.7nF 10% 50V X7R
AVX 06035C472KAT2A
10
2
C20, C36
CAP, 0603 100pF 5% 50V C0G
AVX 06035A101JAT2A
11
2
C37, C38
CAP, 0603 2.2µF 10% 16V X5R
AVX 0603YD225KAT2A
12
1
C39
CAP, 0603 4.7µF 10% 10V X5R
AVX 0603ZD475KAT2A
13
1
C40
CAP, 0603 4.7µF 10% 16V X5R
MURATA GRM188R61C475KAAJD
14
2
C70, C103
CAP, 0805 2.2µF 10% 16V X7R
AVX 0805YC225KAT2A
15
1
C72
CAP, 0603 47nF 10% 25V X7R
AVX 06033C473KAT2A
16
1
C76
CAP, 0603 0.1µF 10% 25V X7R
AVX 06033C104KAT2A
17
1
C78
CAP, 0805 220nF 10% 100V X7R
MURATA GRM21AR72A224KAC5L
18
2
C79, C80
CAP, 1210 100µF 20% 10V X5R
MURATA GRM32ER61A107ME20L
19
1
C81
CAP, 0603 220pF 10% 50V X7R
AVX 06035C221KAT2A
20
2
C82, C83
CAP, 0603 10nF 10% 25V X7R
AVX 06033C103KAT2A
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
2
C96, C97
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
2
D1, D2
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
2
L1, L2
IND, 8.6µH
WURTH ELEKTRONIK 7443630860
30
1
L5
IND, 68µH
SUMIDA CDRH105RNP-680NC
12
dc2155afb
DEMO MANUAL
DC2155A-A/DC2155A-B
PARTS LIST
ITEM
QTY
31
DC2155A-A
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
2
Q1, Q6
XSTR, MOSFET N-CH 60V 25A 5 PIN LFPAK
RENESAS RJK0651DPB
32
2
Q3, Q7
XSTR, MOSFET N-CH 60V 45A 5 PIN LFPAK
RENESAS RJK0653DPB
33
2
Q9, Q10
XSTR, PNP GENERAL PURPOSE SOT-323
DIODES INC. MMST3906-7-F
34
1
Q19
XSTR, MOSFET N-CH 30V 30A 5 PIN LFPAK
RENESAS RJK0305DPB-00#J0
35
1
Q20
XSTR, MOSFET P-CH 20V 5.2A SOT-23
VISHAY Si2365EDS-T1-GE3
36
4
Q22, Q23, Q28, Q29
XSTR, MOSFET N-CH 60V 115mA SOT-23
FAIRCHILD 2N7002A
37
2
R2, R122
RES, 2512 0.006Ω 1% 1W
PANASONIC ERJ-M1WSF6MU
38
2
R3, R4
RES, 0603 1k 5% 1/10W
VISHAY CRCW06031K00JNEA
39
4
R9, R12, R30, R38
RES, 0603 2Ω 5% 1/10W
VISHAY CRCW06032R00JNEA
40
12
R10, R11, R13, R15, R16, R18, R23,
R25, R28, R89, R112, R113
RES, 0603 10k 5% 1/10W
VISHAY CRCW060310K0JNEA
41
2
R14, R37
RES, 2010 3mΩ 1% 1/2W
VISHAY WSL20103L000FEA
42
3
R17, R21, R22, R27, R43, R44, R45,
R96, R98, R106, R109, R128, R129,
R132, R168, R174
RES, 0603 0Ω JUMPER
VISHAY CRCW06030000Z0EA
43
5
R24, R26, R50, R51, R155
RES, 0603 100Ω 5% 1/10W
VISHAY CRCW0603100RJNEA
44
4
R87, R88, R171, R172
RES, 0603 200Ω 5% 1/10W
VISHAY CRCW0603200RJNEA
45
1
R91
RES, 2010 0.01Ω 1% 1/2W
VISHAY WSL2010R0100FEA
46
1
R93
RES, 0603 127Ω 1% 1/10W
VISHAY CRCW0603127RFKEA
47
1
R99
RES, 0603 220k 5% 1/10W
VISHAY CRCW0603220KJNEA
48
2
R114, R115
RES, 0603 10Ω 5% 1/10W
VISHAY CRCW060310R0JNEA
49
2
R119, R120
RES, 0603 4.99k 1% 1/10W
VISHAY CRCW06034K99FKEA
50
2
R124, R125
RES, 2512 0Ω JUMPER
VISHAY CRCW25120000Z0EG
51
1
R146
RES, 0805 4.7Ω 1% 0.125W
VISHAY CRCW08054R70FKEA
52
1
R151
RES, 0603 1M 5% 1/10W
VISHAY CRCW06031M00JNEA
53
1
R152
RES, 0603 681k 1% 1/10W
VISHAY CRCW0603681KFKEA
54
1
R153
RES, 0603 3.3Ω 1% 1/10W
VISHAY CRCW06033R30FKEA
55
1
R154
RES, 0603 82.5Ω 1% 1/10W
VISHAY CRCW060382R5FKEA
56
1
R157
RES, 0603 2Ω 5% 1/10W
VISHAY CRCW06032R00JNEA
57
1
R158
RES, 0603 27.4k 1% 1/10W
VISHAY CRCW060327K4FKEA
58
1
R159
RES, 0603 226k 1% 1/10W
VISHAY CRCW0603226KFKEA
59
1
R160
RES, VARIABLE 5k
BOURNS 3386P-1-502-LF
60
1
R161
RES, 0603 20k 5% 1/10W
VISHAY CRCW060320K0JNEA
61
1
R162
RES, 1206 0Ω JUMPER
VISHAY CRCW12060000Z0EA
62
1
R170
RES, 0603 340Ω 1% 1/10W
VISHAY CRCW0603340KFKEA
63
1
U1
IC, WIDE INPUT AND OUTPUT DC/DC CONVERTER LINEAR TECH. LTC3886IUKG#10E2-PBF-ES
64
1
U3
IC, SYNCHRONUS STEP-DOWN CONVERTER
LINEAR TECH. LTC3630EMSE#PBF
65
1
U4
IC, 24LC05-I/ST
MICROCHIP 24LC025-I/ST
66
1
U5
IC, LTC6992
LINEAR TECH. LTC6992IS6-1
67
1
U6
IC, SINGLE OP AMP
LINEAR TECH. LT1803IS5
dc2155afb
13
DEMO MANUAL
DC2155A-A/DC2155A-B
PARTS LIST
ITEM
QTY
DC2155A-A
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
CAP, 7343 OPTION
OPTION
DC2155A-A Additional Demo Board Circuit Components
1
0
C16, C17, C31, C32
2
0
C19, C35, C73
CAP, 0603 OPTION
OPTION
3
0
C71, C77
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
L1, L2
IND, 6.8µH OPTION
COILCRAFT SER2195H-682KL OPTION
9
0
L1, L2 - ALTERNATE
IND, 6.8µH OPTION
COILCRAFT SER2918H-682KL OPTION
10
0
Q2, Q4, Q5, Q8
XSTR, OPTION
OPTION
11
0
Q27
XSTR, N-CHANNEL DMOS FET OPTION
OPTION
12
0
R5, R6, R7, R8
RES, 2512 0Ω JUMPER OPTION
RN5326 2512 TEPRO NAKOMA OPTION
13
0
R19, R20, R29, R31, R32, R33, R34,
R35, R36, R39, R40, R41, R42, R46,
R47, R48, R49, R97, R100, R101,
R102, R103, R104, R105, R108, R110,
R111, R116, R117, R118, R121, R144,
R145, R147, R148, R169, R173
RES, 0603 OPTION
OPTION
14
0
R90, R92
RES, 0805 OPTION
OPTION
15
0
R107
RES, 1206 OPTION
OPTION
16
0
R163
RES, 1206 0Ω JUMPER OPTION
VISHAY CRCW12060000Z0EA OPTION
DC2155A-A Hardware: For Demo Board Only
1
25
E1, E2, E3, E4, E5, E6, E7, E8, E11, E12, TURRET
E14, E16, E18, E20, E21, E22, E23, E24,
E25, E26, E27, E29, E30, E32, E35, E36
MILL-MAX 2501-2-00-80-00-00-07-0
2
5
JP1, JP2, JP3, JP5, JP6
HEADER, 3 PIN 2mm
SULLINS NRPN031PAEN-RC
3
6
J1, J2, J3, J4, J5, J6
STUD, TESTPIN
PEM KFH-032-10
4
2
J7, J12
CONN, BNC, 5 PINS
CONNEX 112404
5
1
J9
HEADER, 14PIN DUAL ROW R/A
MOLEX 87760-1416
6
1
J10
CONN, SOCKET 14PIN DUAL ROW R/A
SULLINSINC. NPPN072FJFN-RC
7
1
J11
HEADER, 12PIN 2mm STR DL
FCI 98414-G06-12ULF
8
10
LUG RING, #10
KEYSTONE 8205
9
4
MH1, MH2, MH3, MH4
STANDOFF, SNAP ON
KEYSTONE_8831
10
20
NUT, BRASS 10-32
ANY #10-32
11
2
SWITCH, SUBMINATURE SLIDE
C&K JS202011CQN
12
10
WASHER, #10 TIN PLATED BRASS
ANY #10 EXT BZ TN
13
5
SHUNT
SAMTEC 2SN-BK-G
14
SW1, SW2
XJP1, XJP2, XJP3, XJP5, XJP6
dc2155afb
DEMO MANUAL
DC2155A-A/DC2155A-B
PARTS LIST
DC2155A-B
ITEM QTY REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
CAP, 56µF 20% 63V ELEC
SUNCON 63HVP56M
DC2155A-B Required Circuit Components
1
2
C1, C85
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
1
C6
CAP, 0603 1nF 10% 100V X7R
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
4
C13, C28, C55, C68
CAP, 0603 1nF 10% 16V X7R
AVX 0603YC102KAT2A
8
8
C14, C15, C29, C30, C50, C52, C63, C64 CAP, 150µF 16V ELEC. OS-CON
PANASONIC 16SVP150M
9
1
C18
CAP, 0603 8.2nF 10% 50V X7R
AVX 06035C822KAT2A
10
2
C20, C36
CAP, 0603 100pF 5% 50V C0G
AVX 06035A101JAT2A
11
4
C27, C33, C82, C83
CAP, 0603 10nF 10% 25V X7R
AVX 06033C103KAT2A
12
2
C37, C38
CAP, 0603 2.2µF 10% 16V X5R
AVX 0603YD225KAT2A
13
2
C39, C45
CAP, 0603 4.7µF 10% 10V X5R
AVX 0603ZD475KAT2A
14
2
C40, C43
CAP, 0603 4.7µF 10% 16V X5R
MURATA GRM188R61C475KAAJD
15
2
C49, C57
CAP, 0603 10pF 5% 50V C0G
AVX 06035A100JAT2A
16
2
C70, C103
CAP, 0805 2.2µF 10% 16V X7R
AVX 0805YC225KAT2A
17
1
C72
CAP, 0603 47nF 10% 25V X7R
AVX 06033C473KAT2A
18
1
C76
CAP, 0603 0.1µF 10% 25V X7R
AVX 06033C104KAT2A
19
1
C78
CAP, 0805 220nF 10% 100V X7R
MURATA GRM21AR72A224KAC5L
20
2
C79, C80
CAP, 1210 100µF 20% 10V X5R
TAIYO YUDEN LMK325ABJ107MM-T
21
1
C81
CAP, 0603 220pF 10% 50V X7R
AVX 06035C221KAT2A
22
2
C84, C101
CAP, 0603 100nF 20% 16V X7R
AVX 0603YC104MAT2A
23
2
C94, C95
CAP, 1812 10µF 20% 100V X7S
TDK CKG45NX7S2A106M500JH
24
4
C96, C97, C98, C99
CAP, 1206 2.2µF 10% 100V X7R
MURATA GRM31CR72A225KA73L
25
1
C100
CAP, 0603 150pF 5% 50V NPO
AVX 06035A151JAT2A
26
1
C102
CAP, 0603 1µF 20% 25V X5R
AVX 06033D105MAT2A
27
4
D1, D2, D3, D4
DIODE, SCHOTTKY 100V, 1A
DIODES/ZETEX, DFLS1100-7
28
4
D5, D6, D13, D14
LED, 0603 GREEN
OSRAM LG L29K-G2J1-24-Z
29
1
D7
LED, 0603 RED
OSRAM LS L29K-H1J2-1-Z
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 25A 5 PIN LFPAK
RENESAS RJK0651DPB
33
4
Q3, Q7, Q13, Q18
XSTR, MOSFET N-CH 60V 45A 5 PIN LFPAK
RENESAS RJK0653DPB
34
2
Q9, Q10
XSTR, PNP GENERAL PURPOSE SOT-323
DIODES INC. MMST3906-7-F
35
1
Q19
XSTR, MOSFET N-CH 30V 30A 5 PIN LFPAK
RENESAS RJK0305DPB-00#J0
36
1
Q20
XSTR, MOSFET P-CH 20V 5.2A SOT-23
VISHAY Si2365EDS-T1-GE3
dc2155afb
15
DEMO MANUAL
DC2155A-A/DC2155A-B
PARTS LIST
DC2155A-B
ITEM QTY REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
37
4
Q22, Q23, Q28, Q29
XSTR, MOSFET N-CH 60V 115mA SOT-23
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% 1/2W
VISHAY WSL20103L000FEA
44
36
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,
R168, 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
2
R68, R158
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% 1/2W
VISHAY WSL2010R0100FEA
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 1M 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
R170
RES, 0603 340Ω 5% 1/10W
VISHAY CRCW0603340RJNEA
65
1
U1
IC, WIDE INPUT AND OUTPUT DC/DC CONVERTER LINEAR TECH. LTC3886IUKG#10E3-1PBF-ES
66
1
U2
IC, POLYPHASE STEP-DOWN SLAVE CONTROLLER LINEAR TECH. LTC3870EUFD#PBF
67
1
U3
IC, SYNCHRONUS STEP-DOWN CONVERTER
LINEAR TECH. LTC3630EMSE#PBF
68
1
U4
IC, 24LC05-I/ST
MICROCHIP 24LC025-I/ST
69
1
U5
IC, LTC6992
LINEAR TECH. LTC6992IS6-1
70
1
U6
IC, SINGLE OP AMP
LINEAR TECH. LT1803IS5
16
dc2155afb
DEMO MANUAL
DC2155A-A/DC2155A-B
PARTS LIST
DC2155A-B
ITEM QTY REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
DC2155A-B 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
OPTION
CAP, 0603 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
L1, L2, L3, L4
IND, 6.8µH OPTION
COILCRAFT SER2915-682KL OPTION
9
0
L1, L2, L3, L4 - ALTERNATE
IND, 6.8µH OPTION
COILCRAFT SER2918H-682KL OPTION
10
0
Q2, Q4, Q5, Q8, Q12, Q14, Q16, Q17
XSTR, OPTION
OPTION
11
0
Q27
XSTR, N-CHANNEL DMOS FET OPTION
OPTION
12
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
13
0
R90, R92, R94, R95
RES, 0805 OPTION
OPTION
13
0
R107
RES, 1206 OPTION
OPTION
DC2155A-B Hardware: For Demo Board Only
1
26
E1, E2, E3, E4, E5, E6, E7, E8, E11, E12, TURRET
E14, E16, E18, E20, E21, E22, E23, E24,
E25, E26, E27, E29, E30, E32, E35, E36
MILL-MAX 2501-2-00-80-00-00-07-0
2
5
JP1, JP2, JP3, JP5, JP6
SULLINS NRPN031PAEN-RC
HEADER, 3 PIN 2mm
3
6
J1, J2, J3, J4, J5, J6
STUD, TESTPIN
PEM KFH-032-10
4
2
J7, J12
CONN, BNC, 5 PINS
CONNEX 112404
5
1
J9
HEADER, 14PIN DUAL ROW R/A
MOLEX 87760-1416
6
1
J10
CONN, SOCKET 14PIN DUAL ROW R/A
SULLINSINC. NPPN072FJFN-RC
7
1
J11
HEADER, 12PIN 2mm STR DL
FCI 98414-G06-12ULF
8
10
LUG RING, #10
KEYSTONE 8205
9
4
10
20
11
2
12
10
13
5
MH1, MH2, MH3, MH4
SW1, SW2
XJP1, XJP2, XJP3, XJP5, XJP6
STANDOFF, SNAP ON
KEYSTONE_8831
NUT, BRASS 10-32
ANY #10-32
SWITCH, SUBMINATURE SLIDE
C&K JS202011CQN
WASHER, #10 TIN PLATED BRASS
ANY #10 EXT BZ TN
SHUNT
SAMTEC 2SN-BK-G
dc2155afb
17
A
B
C
D
J1
E4
FAULT1B
FAULT0B
SCL
SDA
ALERTB
R11 10K
R13 10K
R15 10K
R36 OPT
R40 OPT
R46 OPT
R49 OPT
R35 OPT
R39 OPT
R41 OPT
R48 OPT
Q10
TSNS1
TSNS0
WP
PG1
10nF
36
6
26
25
24
23
22
21
28
33
34
RUN1 20
PG0
C33
18
17
29
16
15
14
13
RUN0 19
FAULT1B
FAULT0B
R30 2
RUN1
FAULT1B
ALERTB
SDA
SCL
SYNC
C3
10uF
2
R9
2.2uF
C37
VDD25
TSNS1
TSNS0
PHAS_CFG
FREQ_CFG
VOUT1_CFG
2.2uF
C38
VDD33
4.7uF
5
C39
INTVCC
1. ALL RESISTORS AND CAPACITORS ARE 0603.
2 FOR -A OPTION.
R3
1k
1nF
C6
2512
R2 0.006 1%
2512
4
TG0
ISENSE0-
ISENSE0+
BG0
SW0
BOOST0
2
ITH1
SW0
BG0
ISENSE0+
ISENSE0VSENSE0+
VSENSE0ITHR0
ITH0
1
50
4
5
7
8
11
12
SW1
BG1
ISENSE1+
ISENSE1VSENSE1
ITHR1
ITH1
39
42
9
10
35
32
31
VSENSE1
R121
OPT
2
VSENSE0+
R169 OPT
R168 0
BOOST1
40
C18
R12 2
2
PG1
R38 2
0.1uF
Q3
2
OPT
4
ITHR1
C28
1nF
RJK0653DPB
Q7
R173
0.1uF
4
4
C35
R51
Q4
(OPT)
4
100
R50
OPT
100
4
OPT
VIN_PWR
C19
R26 100
R24 100
CUSTOMER NOTICE
ITHR0
C23
4
Q6
RJK0651DPB
1nF
C13
4
4
Q1
RJK0651DPB
RJK0653DPB
C9
D2
R124
0
2512
VIN_PWR
Q8
(OPT)
3
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
L2
C22
C21
C97
2
SCALE = NONE
lf
`\
0805
3m
1210
0805
R37
R92 OPT
C11
22uF
16V
R43
0
22uF
16V
C93
C32
+ 330uF
7343
OPT
GND_SNS
J5
VOUT1
VSENSE0-
E6
GND
R45
0
E8
J6
E7
GND
GND
VOUT1_SNS
5V / 12A
R27
0
VOUT0_SNS
VSENSE0+
J4
E5
2
R8
OPT
2512
VOUT0
12V / 12A
R17
0
J3
2
R7
OPT
2512
DATE:
N/A
SIZE
1
SHEET 1
LTC3886IUKG
DEMO CIRCUIT 2155A-A
Thursday, June 02, 2016
IC NO.
OF 4
4
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
WITH POWER SYSTEM MANAGEMENT
REV.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
C31
+ 330uF
7343
OPT
22uF
16V
C25
+ C30
150uF
OS-CON
16V
22uF
16V
22uF
16V
+ C29
150uF
OS-CON
16V
C24
C26
VOUT1
C17
+ 330uF
7343
OPT
C88
22uF
16V
VOUT1
2
R6
OPT
2512
2
1
R5
OPT
2512
VOUT0
VOUT0
C12
22uF
16V
VOUT0
C16
+ 330uF
7343
OPT
TECHNOLOGY
0805
C77 OPT
+ C14
+ C15
150uF
150uF
OS-CON OS-CON
16V
16V
C10
22uF
16V
TITLE: SCHEMATIC
R44
0
SW1A
R47
OPT
APPROVALS
R42
OPT
R21
0
R14 3m
1210
C71 OPT
R22
0
R90 OPT 0805
2.2uF
1206
2.2uF
1210
2.2uF
1210
R20
OPT
2.2uF
1210
SW0A
2.2uF
1210
C8
8.6uH
7443630860
SW1
R19
OPT
Q5
(OPT)
L1
2.2uF
1206
2
C7
C96
8.6uH
7443630860
SW0
Q2
(OPT)
R125
0
2512
VIN1
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
D1
R129 0
ITH0
C34
4.7nF
VOUT1
R148
OPT
PG0
VOUT0
C36
100pF
TG1
38
51
49
45
41
37
3
BOOST0
R128 0
C20 4.7nF
100pF
TG0
2
52
INTVCC
E2
INTVCC
3
Figure 15a. DC2155A-A Demo Circuit Schematic, Sheet 1
R118
OPT
ITH0
ITH1
ITHR1
VSENSE1+
ISENSE1-
ISENSE1+
BG1
SW1
BOOST1
TG1
NC
NC
NC
NC
NC
NC
ITH0
ITHR0
VSENSE0-
VSENSE0+
C40
4.7uF
16V
C5
10nF
R4
1k
VIN_PWR
R122 0.006 1%
U1
LTC3886IUKG
C4
10nF
VOUT0_CFG
ASEL1
ASEL0
WP
PGOOD1
PGOOD0
RUN1
RUN0
FAULT1
FAULT0
SHARE_CLK
ALERTB
SDA
SCL
SYNC
0.1uF
C94
C87
+
OPT
SHARE_CLK
C86
+
OPT
RUN0
FAULT0B
10nF
C27
R34 OPT
R33 OPT
Q9
R32 OPT
R31 OPT
PG1
E36
PG1
R28 10K
R29 OPT
PG0
R25 10K
E35
FAULT1B
R23 10K
PG0
FAULT0B
R18 10K
R16 10K SHARE_CLK
SYNC
C85
+
56uF
63V
R10 10K
C1
+
56uF
63V
VIN
NOTE: UNLESS OTHERWISE SPECIFIED
E22
E11
VDD25
VDD33
GND
GND
J2
18V - 54V
VIN
VIN
10uF
46
C95
2
1
E3
2
1
4
5
GND
5
47
IINP
48
VIN
VDD25
27
VDD33
30
INTVCC
44
5
1
2
3
1
2
3
IIINM
EXTVCC
43
5
1
2
3
5
1
2
3
5
5
1
2
3
1
2
3
5
1
2
3
5
18
1
2
3
E1
A
B
C
D
DEMO MANUAL
DC2155A-A/DC2155A-B
SCHEMATIC DIAGRAM
dc2155afb
A
B
C
D
MODE0
SYNC
E12
ITH0
FAULT0B
RUN0
ITH0
FAULT0B
RUN0
5
MODE0
PHASMD
ILIM
EXTVCC
OPT
R82
OPT
R79
0
R69
0
R64
0
R61
2
12
11
27
10
9
25
8
5
28
OPT
R83
0
R81
0
R80
0
R78
C57
10pF
1
4
26
R52
C49
10pF
VIN_PWR
OPT
R77
0
R66
0
R62
0
R57
0
R59
49.9k
R68
PHASMD
ILIM
MODE0
MODE0
C43
4.7uF
16V
PHASMD
SYNC
FREQ
ILIM
ITH1
FAULT1
MODE1
RUN1
ITH0
FAULT0
MODE0
RUN0
C44
100nF
20
INTVCC_2
INTVCC_2
INTVCC_2
3
TG0
4
ISENSE1-
ISENSE1+
BG1
SW1
BOOST1
TG1
ISENSE0-
ISENSE0+
BG0
SW0
1nF
1nF
C68
2
R67
R131 0
C55
2
R53
C56
100
OPT
C69
100
2
4
100nF
C60
D4
4
R76
R75
1
OPT
R65 100
R63 100
100nF
C54
D3
INTVCC_2
R130 0
Q12
OPT
INTVCC_2
4
4
3
4
Q16
OPT
R54
OPT
Q18
8.6uH
R71
OPT
R72
OPT
7443630860
L4
C59
2.2uF
1210
R56
0
C58
2.2uF
1210
R58 3m
2010
C47
22uF
16V
C46
22uF
16V
2
0
R74
2
SCALE = NONE
lf
`\
OPT
7343
+ C51
C48
22uF
1210
C67
22uF
1210
22uF
C90
VOUT0
REV.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
OPT
7343
+ C66
22uF
C89
VOUT0
1
DATE:
N/A
SIZE
1
SHEET 2
LTC3886IUKG
DEMO CIRCUIT 2155A-A
Thursday, June 02, 2016
IC NO.
OF 4
4
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
WITH POWER SYSTEM MANAGEMENT
TECHNOLOGY
+ C63
+ C64
+ C65
150uF
150uF
OS-CON OPT
OS-CON
7343
16V
16V
TITLE: SCHEMATIC
C62
22uF
16V
C61
+ C52
+ C50
+ C53
150uF
150uF
OS-CON
OS-CON OPT
7343
16V
16V
22uF
16V
APPROVALS
R73
0
R70 3m
2010
0805
C99
2.2uF
1206
R95
C92 OPT
OPT 0805
SW3A
VIN1
0
R60
0805
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
SW3
R55
OPT
7443630860
SW2A
R94
C91 OPT
OPT 0805
C98
2.2uF
1206
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
Q17
OPT
4
RJK0653DPB
C42
2.2uF
1210
8.6uH
RJK0653DPB
Q13
SW2
L3
C41
2.2uF
1210
RJK0651DPB
Q11
Q15
RJK0651DPB
4
Q14
OPT
4
VIN1
Figure 15b. DC2155A-A Demo Circuit Schematic, Sheet 2
PG0
6
7
16
14
15
13
3
2
21
23
22
24
C45
4.7uF
INTVCC_2
ALL PARTS ON THIS PAGE ARE, NOT STUFFED IN THE -A VERSION
BOOST0
U2
LTC3870EUFD
VIN
17
INTVCC
5
1
2
3
5
EXTVCC
GND
29
PGND
19
2
1
18
EXTVCC
4
5
1
2
3
5
1
2
3
5
1
2
3
5
1
2
3
1
2
3
5
1
2
3
5
1
2
3
5
A
B
C
D
DEMO MANUAL
DC2155A-A/DC2155A-B
SCHEMATIC DIAGRAM
19
dc2155afb
A
B
FAULT0B
VIN
3
Q27
OPT
1
R144 OPT
3V3
1
3V3
VDD33
PG0
5
2N7002A
Q29
FAULT0B
D14
GREEN
R172
200
R145
OPT
2
R159
SET
GND
MOD
DIV
V+
OUT
1
3V3
4
5
6
R152
681K
1%
R151 1M
1
3V3
2N7002A
Q28
FAULT1B
D13
GREEN
R171
200
2N7002A PG1
Q23
PG0
D6
GREEN
R87
200
48Hz,
Less Than 3% Duty Cycle
3
FAULT1B
226k 1%
R158
27.4k
1%
2
1
3
1
3V3
C102
1.0uF
2N7002A
Q22
ALERTB
R160
5K
R155
100
100nF
C101
PG1
D5
GREEN
R88
200
R161
20K
+5V
+5V
4
R170
340
3
2
5
+IN
V-
V+
1
-IN
VOUT
4
1
3V3
U6 LT1803IS5
JP6
ON
OFF
+5V
VIN
R146
4.7
0805
1%
C78
220nF
100V
0805
VIN
D8
OPT
R89
10K
4
Q19
RJK0305DPB
EXT_SUPPLY
2
EXT
3
R157
2
R162
0
1206
VOUT0
3
R147
OPT
R100
OPT
R91
0.01
1%
E14
PULSE IN
C103
2.2uF
0805
C70
2.2uF
0805
JP1
OFF
ON
EXT 5V
VOUT1
VOUT0
1
1
IOUT TST
2
GND
J7
J12
VIN
VOUT1
VOUT0
NOTE:
PULSE OUT
10mV / AMP
E16
E18
R99
220k
R101
OPT
DO NOT EXCEED 5% DUTY CYCLE!
R163
OPT
1206
VOUT1
11
12
5
3
SS
VPRG2
VPRG1
VFB
SW
10
6
7
9
1
R98 0
R132 0
2
SCALE = NONE
lf
`\
APPROVALS
C72
47nF
R97
OPT
R96
0
L5
68uH
SUMIDA CDRH105RNP-680NC
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
ISET
FBO
RUN
VIN
2
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
C81
220pF
C74
2.2uF
100V
1210
U3
LTC3630EMSE
Figure 15c. DC2155A-A Demo Circuit Schematic, Sheet 3
R93
127
ALERTB
D7
RED
INT
JP5
PULSE
PULSE GEN
1
Q20
SI2365EDS-T1-GE3
82.5 1%
R154
C100
150pF
R153 3.3 1%
DYNAMIC LOAD CIRCUIT
ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN
3
2
2
3
2
1
3
5
1
2
3
U5 LTC6992IS6-1
3
2
4
1
3
2
3
4
5
2
3
4
5
C
3
2
GND
D
3
2
GND
8
GND
14
GND
16
20
17
5
C80
100uF
10V
1210
C75
OPT
1210
0
R174
EXTVCC
E21
E20
GND
EXTVCC
EXTVCC
DATE:
N/A
SIZE
1
SHEET 3
LTC3886IUKG
DEMO CIRCUIT 2155A-A
Thursday, June 02, 2016
IC NO.
OF 4
4
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
WITH POWER SYSTEM MANAGEMENT
REV.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
C76
0.1uF
TECHNOLOGY
C79
100uF
10V
1210
TITLE: SCHEMATIC
C73
OPT
EXT_SUPPLY
1
A
B
C
D
DEMO MANUAL
DC2155A-A/DC2155A-B
SCHEMATIC DIAGRAM
dc2155afb
A
B
C
4
3
2
1
SDA
SCL
WP
VCC
5
24LC025-I/ST
VSS
A2
A1
A0
U4
TO DC1613A
AUXP
SDA
GND
SCL
LGKPWR
ALERTB
GPIO_1
OUTEN_0
OUTEN_1
GND
AUXSCL
AUXSDA
J11
100nF
C84
3V3
5
6
7
EESDA
EESCL
EEWP
8 AUXVCC
1
2
3
4
5
6
7
8
9
10
11
12
R119
4.99K
R120
4.99K
ALERTB
2
4
SCL
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
E24
SDA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
OPT
R117
SHARE_CLK
SYNC
R107
OPT
1206
R109
0
R110
OPT
CUSTOMER NOTICE
R108
OPT
E27
SYNC
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
3
3
1
2
SCALE = NONE
lf
`\
APPROVALS
2
R105
OPT
OFF
5
ON
SW1
RUN0
1
R103
OPT
C
NC
RUN0-RUN1
2
C83
10nF
R115
10
E30
E29
E32
RUN1
RUN1
RUN0
RUN0
FAULT0B
SGND
FAULT1B
REV.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
2
10K
R113
VDD33
1
DATE:
N/A
SIZE
1
SHEET 4
LTC3886IUKG
DEMO CIRCUIT 2155A-A
Thursday, June 02, 2016
IC NO.
OF 4
4
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
WITH POWER SYSTEM MANAGEMENT
TECHNOLOGY
C82
10nF
R114
10
R112
10K
VDD33
3
JP3
D9
OPT
TITLE: SCHEMATIC
OFF
5
ON
SW2
RUN1
D12
OPT
C
NC
FAULT0B-FAULT1B
J10 DEMO HEADER (F)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
R111 OPT
R106 0
R104 OPT
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
VIN
3V3
E26
SHARE_CLK
JP2
Figure 15d. DC2155A-A Demo Circuit Schematic, Sheet 4
OPT
E25
SCL
J9 DEMO HEADER (M)
SDA
R116
E23
ALERTB
R102 OPT
4
1
6
3
D
3
2
ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN
4
4
1
6
3
5
A
B
C
D
DEMO MANUAL
DC2155A-A/DC2155A-B
SCHEMATIC DIAGRAM
21
dc2155afb
A
B
C
D
J1
J2
E4
FAULT1B
FAULT0B
SDA
ALERTB
R13 10K
R15 10K
R36 OPT
R40 OPT
R46 OPT
R49 OPT
R35 OPT
R39 OPT
R41 OPT
R48 OPT
+
Q10
TSNS1
TSNS0
WP
PG1
10nF
36
6
26
25
24
23
22
21
28
33
34
RUN1 20
PG0
C33
18
17
29
16
15
14
13
RUN0 19
FAULT1B
FAULT0B
R30 2
RUN1
FAULT1B
ALERTB
SDA
SCL
C3
10uF
2
R9
2.2uF
C37
VDD25
TSNS1
TSNS0
PHAS_CFG
FREQ_CFG
VOUT1_CFG
2.2uF
C38
VDD33
4.7uF
5
C39
INTVCC
1. ALL RESISTORS AND CAPACITORS ARE 0603.
2 FOR -A OPTIONAL.
R3
1k
1nF
C6
2512
R2 0.003 1%
2512
4
TG0
ISENSE0-
ISENSE0+
BG0
SW0
BOOST0
SW0
BG0
ISENSE0+
ISENSE0VSENSE0+
VSENSE0ITHR0
ITH0
1
50
4
5
7
8
11
12
SW1
BG1
ISENSE1+
ISENSE1VSENSE1
ITHR1
ITH1
39
42
9
10
35
32
31
VSENSE1
PG1
R148
0
2
VOUT0
PG0
C18
R12 2
VOUT1
C34
OPT
R38 2
R129 0
ITH0
0.1uF
Q3
2
0
4
ITHR1
C28
1nF
RJK0653DPB
Q7
R173
0.1uF
4
4
C35
Q4
(OPT)
4
100
R50
OPT
100
4
OPT
VIN_PWR
C19
R26 100
R24 100
R51
R124
0
2512
CUSTOMER NOTICE
ITHR0
C23
4
Q6
RJK0651DPB
1nF
C13
4
4
Q1
RJK0651DPB
RJK0653DPB
C9
D2
VIN_PWR
Q8
(OPT)
3
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
L2
2.2uF
1210
C22
C21
C97
R47
OPT
2
SCALE = NONE
lf
`\
0805
3m
1210
0805
R37
R92 OPT
C11
22uF
16V
R43
0
22uF
16V
C93
C32
+ 330uF
7343
OPT
GND_SNS
GND
J5
E8
J6
E7
GND
GND
VOUT1_SNS
VOUT1
VSENSE0-
E6
R45
0
R27
0
VOUT0_SNS
VSENSE0+
J4
E5
2
R8
0
2512
VOUT0
12V / 48A
R17
0
J3
2
R7
0
2512
DATE:
N/A
SIZE
1
SHEET 1
LTC3886IUKG
DEMO CIRCUIT 2155A-B
Thrursday, June 02, 2016
IC NO.
OF 4
4
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
WITH POWER SYSTEM MANAGEMENT
REV.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
C31
+ 330uF
7343
OPT
22uF
16V
C25
+ C30
150uF
OS-CON
16V
22uF
16V
22uF
16V
+ C29
150uF
OS-CON
16V
C24
C26
VOUT1
C17
+ 330uF
7343
OPT
C88
22uF
16V
VOUT1
2
R6
0
2512
2
1
R5
0
2512
VOUT0
VOUT0
C12
22uF
16V
VOUT0
C16
+ 330uF
7343
OPT
TECHNOLOGY
0805
C77 OPT
+ C14
+ C15
150uF
150uF
OS-CON OS-CON
16V
16V
C10
22uF
16V
TITLE: SCHEMATIC
R44
0
SW1A
2.2uF
1206
2.2uF
1210
2.2uF
1210
R21
0
R14 3m
1210
C71 OPT
R22
0
R90 OPT 0805
SW0A
2.2uF
1210
APPROVALS
R42
OPT
2.2uF
1206
2
R20
OPT
8.6uH
7443630860
SW1
R19
OPT
Q5
(OPT)
L1
C8
C7
C96
8.6uH
7443630860
SW0
Q2
(OPT)
R125
0
2512
VIN1
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
D1
3
Figure 16a. DC2155A-B Demo Circuit Schematic, Sheet 1
ITH1
2
R121
0
2
VSENSE0+
R169 OPT
R168 0
BOOST1
40
C36
100pF
TG1
38
51
49
45
41
37
3
BOOST0
R128 0
C20 8.2nF
100pF
TG0
2
INTVCC
E2
INTVCC
52
R118
0
ITH0
ITH1
ITHR1
VSENSE1+
ISENSE1-
ISENSE1+
BG1
SW1
BOOST1
TG1
NC
NC
NC
NC
NC
NC
ITH0
ITHR0
VSENSE0-
VSENSE0+
C40
4.7uF
16V
C5
10nF
R4
1k
VIN_PWR
R122 0.003 1%
U1
LTC3886IUKG
C4
10nF
VOUT0_CFG
ASEL1
ASEL0
WP
PGOOD1
PGOOD0
RUN1
RUN0
FAULT1
FAULT0
SHARE_CLK
ALERTB
SDA
SCL
SYNC
0.1uF
C94
C87
OPT
SYNC
+
SHARE_CLK
C86
OPT
RUN0
FAULT0B
10nF
C27
R34 OPT
R33 OPT
Q9
R32 OPT
R31 OPT
PG1
E36
PG1
R28 10K
R29 OPT
PG0
R25 10K
E35
FAULT1B
R23 10K
PG0
FAULT0B
R18 10K
R16 10K SHARE_CLK
SCL
C85
56uF
63V
SYNC
+
R11 10K
C1
56uF
63V
R10 10K
+
VIN
NOTE: UNLESS OTHERWISE SPECIFIED
E22
E11
VDD25
VDD33
GND
GND
18V - 54V
VIN
VIN
10uF
46
C95
2
1
E3
2
1
4
5
GND
5
47
IINP
48
VIN
VDD25
27
VDD33
30
INTVCC
44
5
1
2
3
1
2
3
IIINM
EXTVCC
43
5
1
2
3
5
1
2
3
5
5
1
2
3
1
2
3
5
1
2
3
5
22
1
2
3
E1
A
B
C
D
DEMO MANUAL
DC2155A-A/DC2155A-B
SCHEMATIC DIAGRAM
dc2155afb
A
B
C
D
MODE0
SYNC
E12
ITH0
FAULT0B
RUN0
ITH0
FAULT0B
RUN0
5
MODE0
PHASMD
ILIM
EXTVCC
OPT
R82
OPT
R79
0
R69
0
R64
0
R61
2
12
11
27
10
9
25
8
5
28
OPT
R83
0
R81
0
R80
0
R78
C57
10pF
1
4
26
R52
C49
10pF
VIN_PWR
OPT
R77
0
R66
0
R62
0
R57
0
R59
49.9k
R68
PHASMD
ILIM
MODE0
MODE0
C43
4.7uF
16V
PHASMD
SYNC
FREQ
ILIM
ITH1
FAULT1
MODE1
RUN1
ITH0
FAULT0
MODE0
RUN0
C44
100nF
20
INTVCC_2
INTVCC_2
INTVCC_2
3
4
ISENSE1-
ISENSE1+
BG1
SW1
BOOST1
TG1
ISENSE0-
ISENSE0+
BG0
SW0
BOOST0
TG0
1nF
1nF
C68
2
R67
R131 0
C55
2
R53
C56
100
OPT
C69
100
2
4
100nF
C60
D4
4
R76
R75
1
OPT
R65 100
R63 100
100nF
C54
D3
INTVCC_2
R130 0
Q12
OPT
INTVCC_2
4
4
3
4
Q16
OPT
R54
OPT
Q18
8.6uH
R71
OPT
R72
OPT
7443630860
L4
C59
2.2uF
1210
R56
0
C58
2.2uF
1210
R58 3m
2010
C47
22uF
16V
C46
22uF
16V
2
0
R74
`\
2
SCALE = NONE
lf
OPT
7343
+ C51
C48
22uF
1210
C67
22uF
1210
22uF
C90
VOUT0
REV.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
OPT
7343
+ C66
22uF
C89
VOUT0
1
DATE:
N/A
SIZE
1
SHEET 2
LTC3886IUKG
DEMO CIRCUIT 2155A-B
Thrursday, June 02, 2016
IC NO.
OF 4
4
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
WITH POWER SYSTEM MANAGEMENT
TECHNOLOGY
+ C63
+ C64
+ C65
150uF
150uF
OS-CON OPT
OS-CON
7343
16V
16V
TITLE: SCHEMATIC
C62
22uF
16V
C61
+ C52
+ C50
+ C53
150uF
150uF
OS-CON
OS-CON OPT
7343
16V
16V
22uF
16V
APPROVALS
R73
0
R70 3m
2010
0805
C99
2.2uF
1206
R95
C92 OPT
OPT 0805
SW3A
VIN1
0
R60
0805
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
SW3
R55
OPT
7443630860
SW2A
R94
C91 OPT
OPT 0805
C98
2.2uF
1206
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
Q17
OPT
4
RJK0653DPB
C42
2.2uF
1210
8.6uH
RJK0653DPB
Q13
SW2
L3
C41
2.2uF
1210
RJK0651DPB
Q11
Q15
RJK0651DPB
4
Q14
OPT
4
VIN1
Figure 16b. DC2155A-B Demo Circuit Schematic, Sheet 2
PG0
6
7
16
14
15
13
3
2
21
23
22
24
C45
4.7uF
INTVCC_2
ALL PARTS ON THIS PAGE ARE, NOT STUFFED IN THE -A VERSION
U2
LTC3870EUFD
VIN
17
INTVCC
5
1
2
3
5
EXTVCC
GND
29
PGND
19
2
1
18
EXTVCC
4
5
1
2
3
5
1
2
3
5
1
2
3
5
1
2
3
1
2
3
5
1
2
3
5
1
2
3
5
A
B
C
D
DEMO MANUAL
DC2155A-A/DC2155A-B
SCHEMATIC DIAGRAM
23
dc2155afb
A
B
FAULT0B
VIN
3
Q27
OPT
1
R144 OPT
3V3
1
3V3
PG0
5
2N7002A
Q29
FAULT0B
D14
GREEN
R172
200
R145
OPT
2
VDD33
R158
27.4k
1%
SET
GND
MOD
DIV
V+
OUT
1
3V3
4
5
6
R152
681K
1%
R151 1M
1
3V3
2N7002A
Q28
FAULT1B
D13
GREEN
R171
200
2N7002A PG1
Q23
PG0
D6
GREEN
R87
200
48Hz,
Less Than 3% Duty Cycle
3
2
FAULT1B
226k 1%
R159
U5 LTC6992IS6-1
1
3V3
C102
1.0uF
+5V
Q22
2N7002A
ALERTB
R160
5K
R155
100
100nF
C101
PG1
D5
GREEN
R88
200
R161
20K
+5V
3
2
4
R170
340
3
2
5
4
+IN
V-
V+
1
-IN
VOUT
4
1
3V3
U6 LT1803IS5
3
JP6
ON
OFF
+5V
VIN
VIN
R146
4.7
0805
1%
C78
220nF
100V
0805
D8
OPT
R89
10K
4
Q19
RJK0305DPB
EXT_SUPPLY
2
EXT
3
R157
2
R162
0
1206
VOUT0
R147
OPT
R100
OPT
R91
0.01
1%
C103
2.2uF
0805
JP1
OFF
ON
EXT 5V
VOUT1
C70
2.2uF
0805
R163
0
1206
VOUT0
3
E14
PULSE IN
1
1
IOUT TST
2
GND
J7
J12
VIN
VOUT1
VOUT0
NOTE:
PULSE OUT
10mV / AMP
E16
E18
R99
220k
R101
OPT
DO NOT EXCEED 5% DUTY CYCLE!
2
VOUT1
11
12
5
3
SS
VPRG2
VPRG1
VFB
SW
10
6
7
9
1
R132 0
R98 0
2
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
lf
`\
APPROVALS
C72
47nF
R97
OPT
R96
0
L5
68uH
SUMIDA CDRH105RNP-680NC
CUSTOMER NOTICE
ISET
FBO
RUN
VIN
2
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
C81
220pF
C74
2.2uF
100V
1210
U3
LTC3630EMSE
Figure 16c. DC2155A-B Demo Circuit Schematic, Sheet 3
R93
127
ALERTB
D7
RED
INT
JP5
PULSE
PULSE GEN
1
Q20
SI2365EDS-T1-GE3
82.5 1%
R154
C100
150pF
R153 3.3 1%
DYNAMIC LOAD CIRCUIT
2
3
2
1
3
5
1
2
3
1
3
2
ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN
1
3
2
3
4
5
2
3
4
5
C
3
2
GND
D
3
2
GND
8
GND
14
GND
16
24
17
5
C76
0.1uF
0
R174
EXTVCC
E21
E20
GND
EXTVCC
EXTVCC
DATE:
N/A
SIZE
1
SHEET 3
LTC3886IUKG
DEMO CIRCUIT 2155A-B
Thursday, June 02, 2016
IC NO.
OF 4
4
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
WITH POWER SYSTEM MANAGEMENT
REV.
LTC Confidential-For Customer Use Only
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
TECHNOLOGY Fax: (408)434-0507
C75
OPT
1210
EXT_SUPPLY
C79
100uF
10V
1210
TITLE: SCHEMATIC
C73
OPT
C80
100uF
10V
1210
1
A
B
C
D
DEMO MANUAL
DC2155A-A/DC2155A-B
SCHEMATIC DIAGRAM
dc2155afb
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
A
B
C
4
3
2
1
SDA
SCL
WP
VCC
5
24LC025-I/ST
VSS
A2
A1
A0
U4
TO DC1613A
AUXP
SDA
GND
SCL
LGKPWR
ALERTB
GPIO_1
OUTEN_0
OUTEN_1
GND
AUXSCL
AUXSDA
100nF
C84
5
6
7
EESDA
EESCL
EEWP
8 AUXVCC
1
2
3
4
5
6
7
8
9
10
11
12
3V3
R119
4.99K
R120
4.99K
2
4
SCL
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
E24
SDA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
OPT
SHARE_CLK
SYNC
R107
OPT
1206
R109
0
R110
OPT
CUSTOMER NOTICE
R108
OPT
E27
SYNC
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
3
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
1
2
SCALE = NONE
lf
`\
APPROVALS
OFF
5
ON
SW2
RUN1
D12
OPT
C
NC
FAULT0B-FAULT1B
J10 DEMO HEADER (F)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
R111 OPT
R106 0
R104 OPT
3
JP2
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
VIN
3V3
E26
SHARE_CLK
Figure 16d. DC2155A-B Demo Circuit Schematic, Sheet 4
OPT
R117
E25
SCL
J9 DEMO HEADER (M)
SDA
R116
E23
ALERTB
R102 OPT
C82
10nF
R114
10
R112
10K
VDD33
3
2
C83
10nF
R115
10
E30
E29
E32
RUN1
RUN1
RUN0
RUN0
FAULT0B
SGND
FAULT1B
REV.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
2
10K
R113
VDD33
1
DATE:
N/A
SIZE
1
SHEET 4
LTC3886IUKG
DEMO CIRCUIT 2155A-B
Thrursday, June 02, 2016
IC NO.
OF 4
4
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
WITH POWER SYSTEM MANAGEMENT
TECHNOLOGY
OFF
5
ON
SW1
RUN0
1
R103
OPT
C
NC
RUN0-RUN1
JP3
D9
OPT
TITLE: SCHEMATIC
2
R105
OPT
4
1
6
3
J11
ALERTB
3
2
ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN
4
4
1
6
3
D
5
A
B
C
D
DEMO MANUAL
DC2155A-A/DC2155A-B
SCHEMATIC DIAGRAM
dc2155afb
25
DEMO MANUAL
DC2155A-A/DC2155A-B
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:
This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT
OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety
measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union
directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.
If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date
of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU
OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR
ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all
appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or
agency certified (FCC, UL, CE, etc.).
No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.
Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and
observe good laboratory practice standards. Common sense is encouraged.
This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
26 Linear Technology Corporation
dc2155afb
LT 0616 REV B • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2015
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