1
DEMO MANUAL DC2595A
UG-1383 Rev. 0
DESCRIPTION
LTC3889EUKG 60V Dual Output Step-Down DC/DC
Controller with Digital Power System Management
Demonstration circuit 2595A is a high voltage, dual out-
put step-down synchronous buck converter featuring the
LTC
®
3889EUKG, a 60V dual-phase current mode control-
ler. The LTC3889 has the PMBus interface and the power
system management functions.
The DC2595A uses discrete MOSFET as the power stage.
The input range of this board is from 36V to 54V, and
the default outputs are 12V/20A (VOUT0) and 24V/20A
(V
OUT1
). DC2595A also has an on-board dynamic load
circuit, which makes it easy for the customer to evaluate
the transient performances.
Please be aware that the DC2595A default connects V
OUT0
(12V) to the LTC3889 EXTV
CC
pin through R168. As a
result, the DRVCC can be adjusted to 6.3V, 7.4V or 9V by
setting DRVSET to 0, 1 or 2 in LTpowerPlay
®
. If you want
to adjust VOUT0 to a voltage higher than 12V, R168 must
be removed first to avoid damaging the IC.
The DC2595A powers up to default settings and produces
power based on configuration resistors or NVM without All registered trademarks and trademarks are the property of their respective owners.
PERFORMANCE SUMMARY
the need for any serial bus communication. This allows
easy evaluation of the DC/DC converter aspects of the
LTC3889. 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.
GUI Download
The software can be downloaded from:
LTpowerPlay
For more details and instructions of LTpowerPlay, please
refer to LTpowerPlay Quick Start Procedure for LTC3889
demo board.
Design files for this circuit board are available.
Specifications are at TA = 25°C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Supply Range 36 48 54 V
FSW Factory Default Switching Frequency 150 kHz
VOUT0 CH0 Output Voltage Range IOUT0 = 0A TO 20A, VIN = 36V to 54V 12 V
IOUT0 CH0 Output Current Range 0 20 A
EFF CH0 Full Load Efficiency VOUT0 = 12V, IOUT0 = 20A, EXTVCC = 12V, DRVCC = 9V,
See Figure 4.
97.0 %
VOUT1 CH1 Output Voltage Range IOUT1 = 0A to 20A, VIN = 36V to 54V 24 V
IOUT1 CH1 Output Current Range 0 20 A
EFF CH1 Full Load Efficiency VOUT1 = 24V, IOUT1 = 20A, EXTVCC = 12V, DRVCC = 9V,
See Figure 4.
98.2 %
2
DEMO MANUAL DC2595A
UG-1383 Rev. 0
QUICK START PROCEDURE
Demonstration circuit 2595A makes it easy to set up
to evaluate the performances of the LTC3889. Refer to
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 3 for proper scope
probe technique.
1. Make sure jumpers are in the following positions:
JUMPER
POSITION
FUNCTION
JP1 OFF Ext 5.5V (On-Board Bias Supply) for EXTVCC
JP2 NC FAULT0B to FAULT1B
JP3 NC 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 the output.
3. Make sure both RUN switches (SW1, SW2) are OFF.
4. Set the input power supply between 36V to 54V; 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. VOUT0 = 12.0V ± 0.5% (11.94V
~ 12.06V), VOUT1 = 24V ± 0.5% (23.88V ~ 24.12V).
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 Procedure sec-
tion for details.
3
DEMO MANUAL DC2595A
UG-1383 Rev. 0
QUICK START PROCEDURE
Connecting a PC to DC2595A
You can use a PC to reconfigure the power management
features of the LTC3889 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.
Figure 1. Demo Setup with PC for DC2595A
Figure 2. Power Test Setup for DC2595A
4
DEMO MANUAL DC2595A
UG-1383 Rev. 0
Measuring Efficiency
To accurately measure efficiency of any configuration, do
the following:
• Set JP6 to OFF Position to Disable the Pulse Generator
Circuits.
• Measure VIN Across the Input Ceramic Capacitor (C7
for CH0, C21 for CH1). Measure V
OUT
across the output
ceramic capacitor (C10 for CH0, C26 for CH1).
Measuring Output Ripple Voltage
An accurate ripple measurement may be performed by
using the configuration shown in Figure 3 across C10/C26.
Figure 3. Measuring Output Voltage Ripple
Figure 4. Typical Efficiency Curves DC2595A, VIN = 48V, FSW = 150kHz, CCM, EXTVCC = 12V, DRVCC = 9V
QUICK START PROCEDURE
+ –
VOUT GND
COUT
LOAD CURRENT (A)
0
5
10
15
20
93
94
95
96
97
98
99
EFFICIENCY (%)
DC2595A F04
VOUT1 = 24V
VOUT0 = 12V
5
DEMO MANUAL DC2595A
UG-1383 Rev. 0
QUICK START PROCEDURE
Figure 5. Load Transient Waveform DC2595A, VIN=48V, VOUT0= 12V, FSW = 150kHz, 0% to 25% (5A) Load Step
Figure 6. Load Transient Waveform DC2595A, VIN=48V, VOUT1= 24V, FSW = 150kHz, 0% to 25% (5A) Load Step
VOUT
200mV/DIV
IOUT
5A/DIV
VOUT
200mV/DIV
IOUT
5A/DIV
6
DEMO MANUAL DC2595A
UG-1383 Rev. 0
Figure 7. Thermal Image DC2595A, FSW = 150kHz, VIN = 48V, VOUT0 = 12V/20A, VOUT1 = 24V/20A, No Airflow
QUICK START PROCEDURE
7
DEMO MANUAL DC2595A
UG-1383 Rev. 0
LTpowerPlay is a powerful Windows-based development
environment that supports Analog Devices power sys-
tem management ICs, including the LTC3880, LTC3883,
LTC3882, LTC3887 and LTC3889. 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. LTpowerPlay provides unprecedented diag-
nostic and debug features. It becomes a valuable diag-
nostic tool during board bring-up to program or tweak the
LTpowerPlay SOFTWARE GUI
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
LTC3889’s DC2595A 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 Analog
Devices Digital Power Products visit Help. View online
help on the LTpowerPlay menu.
Figure 8. LTpowerPlay Main Interface
8
DEMO MANUAL DC2595A
UG-1383 Rev. 0
The following procedure describes how to use LTpow-
erPlay to monitor and change the settings of LTC3889.
1. Download and install the LTPowerPlay GUI:
LTpowerPlay
2. Launch the LTpowerPlay GUI.
a. The GUI should automatically identify the DC2595A.
The system tree on the left-hand side should look
like this:
b. A green message box shows for a few seconds in
the lower left-hand side corner, confirming that the
LTC3889 is communicating:
c. In the Toolbar, click the “R” (RAM to PC) icon to
read the RAM from the LTC3889. This reads the
configuration from the RAM of LTC3889 and loads
it into the GUI.
LTpowerPlay QUICK START PROCEDURE
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 reg-
ister values to the LTC3889. After finishing this step, you
will see the output voltage will change to 10V.
If the write is successful, you will see the following mes-
sage:
e. You can save the changes into the NVM. In the tool
bar, click “RAM to NVM” button, as follows:
f. Save the demo board configuration to a (*.proj)
file. Click the Save icon and save the file with a new
file name.
9
DEMO MANUAL DC2595A
UG-1383 Rev. 0
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 14 R17, R21, R22, R27, R43, R44, R45,
R98, R106, R109, R128, R129, R132,
R168
RES., 0Ω, 1/10W, 0603, AEC-Q200 NIC, NRC06ZOTRF
VISHAY, CRCW06030000Z0EA
2 3 R93, R171, R172 RES., 127Ω, 1%, 1/10W, 0603, AEC-Q200 NIC, NRC06F1270TRF
PANASONIC, ERJ3EKF1270
VISHAY, CRCW0603127RFKEA
3 1 R99 RES., 220k, 5%, 1/10W, 0603 PANASONIC, ERJ3GEYJ224V
VISHAY, CRCW0603220KJNEA
4 1 R161 RES., 20k, 5%, 1/10W, 0603, AEC-Q200 PANASONIC, ERJ3GEYJ203V
VISHAY, CRCW060320K0JNEA
5 1 R162 RES., 0Ω, 1/4W, 1206, AEC-Q200 NIC, NRC12ZOTRF
PANASONIC, ERJ8GEY0R00V
VISHAY, CRCW12060000Z0EA
6 5 R9, R12, R30, R38, R157 RES., 2, 5%, 1/10W, 0603 NIC, NRC06J2R0TRF
VISHAY, CRCW06032R00JNEA
7 1 R152 RES., 681k, 1%, 1/10W, 0603 NIC, NRC06F6813TRF
VISHAY, CRCW0603681KFKEA
8 1 R91 RES., 0.01Ω, 1%, 1/2W, 2010, SENSE, AEC-Q200 VISHAY, WSL2010R0100FEA
9 1 R158 RES., 27.4k, 1%, 1/10W, 0603, AEC-Q200 VISHAY, CRCW060327K4FKEA
10 1 R170 RES., 340Ω, 1%, 1/10W, 0603, AEC-Q200 VISHAY, CRCW0603340RFKEA
11 1 R154 RES., 82.5Ω, 1%, 1/10W, 0603, AEC-Q200 VISHAY, CRCW060382R5FKEA
12 1 R153 RES., 3.3Ω, 1%, 1/10W, 0603, AEC-Q200 VISHAY, CRCW06033R30FKEA
13 1 R146 RES., 4.7Ω, 1%, 1/8W, 0805, AEC-Q200 VISHAY, CRCW08054R70FKEA
14 1 R2 RES., 0.002Ω, 1%, 2W, 2512 STACKPOLE ELECTRONICS,
CSNL2512FT2L00
15 2 R14, R37 RES., 0.002Ω, 1%, 1.5W, 2010 STACKPOLE ELECTRONICS,
CSNL2010FT2L00
16 13 R10, R11, R13, R15, R16, R18, R23,
R25, R28, R89, R97, R112, R113
RES., 10k, 5%, 1/10W, 0603, AEC-Q200 PANASONIC, ERJ3GEYJ103V
VISHAY, CRCW060310K0JNEA
17 2 R119, R120 RES., 4.99k, 1%, 1/10W, 0603 NIC, NRC06F4991TRF
VISHAY, CRCW06034K99FKEA
18 3 R3, R4, R96 RES., 1k, 5%, 1/10W, 0603, AEC-Q200 VISHAY, CRCW06031K00JNEA
19 5 R24, R26, R50, R51, R155 RES., 100Ω, 5%, 1/10W, 0603, AEC-Q200 PANASONIC, ERJ3GEYJ101V
VISHAY, CRCW0603100RJNEA
20 1 R159 RES., 226k, 1%, 1/10W, 0603 VISHAY, CRCW0603226KFKEA
YAGEO, RC0603FR-07226KL
21 2 R114, R115 RES., 10Ω, 5%, 1/10W, 0603 NIC, NRC06J100TRF
VISHAY, CRCW060310R0JNEA
22 2 R87, R88 RES., 200Ω, 5%, 1/10W, 0603 NIC, NRC06J201TRF
VISHAY, CRCW0603200RJNEA
23 1 R151 RES., 1MΩ, 5%, 1/10W, 0603 NIC, NRC06J105TRF
VISHAY, CRCW06031M00JNEA
10
DEMO MANUAL DC2595A
UG-1383 Rev. 0
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
24 1 R160 RES., 5k, 10%, 1/2W, THT 3/8 SQ, 1-TURN,
TOP ADJ., TRIMPOT
BOURNS, 3386P-1-502-LF
25 1 C78 CAP., 0.22μF, X7R, 100V, 10%, 0805 MURATA, GRM21AR72A224KAC5L
26 1 C81 CAP., 220pF, X7R, 50V, 10%, 0603 AVX, 06035C221KAT2A
27 1 C72 CAP., 0.047μF, X7R, 25V, 10%, 0603 AVX, 06033C473KAT2A
MURATA, GRM188R71E473KA01D
NIC, NMC0603X7R473K25TRPF
28 2 C70, C103 CAP., 2.2μF, X7R, 50V, 10%, 0805 TDK, C2012X7R1H225K125AC
29 1 C102 CAP., 1μF, X5R, 25V, 20%, 0603 AVX, 06033D105MAT2A
TAIYO YUDEN, TMK107BJ105MA-T
TDK, C1608X5R1E105M080AC
30 3 C6,C13,C28 CAP.,1000pF, X7R, 100V, 10%, 0603 AVX, 06031C102KAT2A
MURATA, GRM188R72A102KA01D
31 2 C94, C95 CAP., 10μF, X7S, 100V, 20%, 1812 TDK, CKG45NX7S2A106M500JH
32 2 C96, C97 CAP., 2.2μF, X7R, 100V, 10%, 1206 MURATA, GRM31CR72A225KA73L
33 4 C14, C15, C29, C30 CAP., 120μF, ALUM POLYMER, 50V, 20%,
10mm × 12.6mm
PANASONIC, 50SVPK120M
34 8 C10, C11, C12, C24, C25, C26, C88, C93 CAP., 10μF, X7R, 63V, 10%, 1210 MURATA, GRM32ER71J106KA12L
35 4 C7, C8, C21, C22 CAP., 4.7μF, X7S, 100V, 10%, 1210 TDK, C3225X7S2A475K200AB
TDK, C3225X7S2A475K200AE
36 1 C100 CAP., 150pF, NP0, 50V, 5%, 0603 AVX, 06035A151JAT2A
37 1 C74 CAP., 2.2μF, X7R, 100V, 10%, 1210 AVX, 12101C225KAT2A
MURATA, GRM32ER72A225KA35K
MURATA, GRM32ER72A225KA35L
NIC, NMC1210X7R225K100TRPLPF
38 2 C84, C101 CAP., 0.1μF, X7R, 16V, 20%, 0603 AVX, 0603YC104MAT2A
MURATA, GRM188R71C104MA01D
39 2 C1, C85 CAP., 56μF, ALUM, ELECT, 63V, 20%, SMD SUN ELECTRONIC INDUSTRIES CORP.,
63HVH56M
40 2 C39, C40 CAP., 4.7μF, X5R, 16V, 10%, 0603 AVX, 0603YD475KAT2A
MURATA, GRM188R61C475KE11D
TDK, C1608X5R1C475K080AC
41 2 C79, C80 CAP., 100μF, X5R, 16V, 20%, 1210 TAIYO YUDEN, EMK325ABJ107MM-T
42 2 C20,C36 CAP., 33pF, C0G, 50V, 5%,0 603 AVX, 06035A330JAT2A
TDK, C1608C0G1H330J080AA
VISHAY, VJ0603Q330JXAPW1BC
43 4 C3, C9, C23, C76 CAP., 0.1μF, X7R, 100V, 10%, 0603 MURATA, GRM188R72A104KA35D
44 6 C4, C5, C27, C33, C82, C83 CAP., 0.01μF, X7R, 100V, 10%, 0603 AVX, 06031C103KAT2A
45 2 C18, C34 CAP., 6800pF, X7R, 50V, 10%, 0603 AVX, 06035C682KAT2A
KEMET, C0603C682K5RAC7867
KEMET, C0603C682K5RACTU
MURATA, GRM188R71H682KA01D
PARTS LIST
11
DEMO MANUAL DC2595A
UG-1383 Rev. 0
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
46 2 C37, C38 CAP., 2.2μF, X5R, 16V, 10%, 0603 AVX, 0603YD225KAT2A
MURATA, GRM188R61C225KE15D
TDK, C1608X5R1C225K080AB
47 2 L1, L2 IND., 6.8μH, POWER SHIELDED, ±15%, 40A,
0.88mΩ DCR, 28 × 27mm × 18.5mm
WURTH ELEKTRONIK, 7443640680B
48 4 Q3, Q4, Q7, Q8 XSTR., MOSFET, N-CH, 80V, 100A, PG-TDSON-8 INFINEON, BSC040N08NS5ATMA1
49 4 Q1, Q2, Q5, Q6 XSTR., POWER N-CHAN, 80V, 74A, 8-Pin TDSON INFINEON, BSC072N08NS5
INFINEON, BSC072N08NS5ATMA1
50 1 U4 IC, MEMORY, EEPROM, 2Kb (256 × 8),
TSSOP-8, 400kHz
MICROCHIP, 24LC025-I/ST
MICROCHIP, 24LC025T-I/ST
51 1 U6 IC, SINGLE R TO R IN/OUT OP AMP, TSOT23-5,
100V/μs, 85MHz
ANALOG DEVICES, LT1803IS5#PBF
ANALOG DEVICES, LT1803IS5#TRPBF
52 1 U3 IC, SYNCHR. STEP-DOWN CONVERTER,
MSOP-16
ANALOG DEVICES, LTC3630EMSE#PBF
ANALOG DEVICES, LTC3630EMSE#TRPBF
53 1 U1 IC, WIDE I/O DC/DC CONVERTER, 52-PIN QFN ANALOG DEVICES, LTC3889IUKG#PBF
ANALOG DEVICES, LTC3889IUKG#TRPBF
54 1 U5 IC, TIMERBLOX: VOLTAGE CTRL PWM, TSOT-23-6 ANALOG DEVICES, LTC6992IS6-1#PBF
ANALOG DEVICES, LTC6992IS6-1#TRPBF
Additional Demo Board Circuit Components
1 0 R5, R6, R7, R8, R19, R20, R29, R31,
R32, R33, R34, R35, R36, R39, R40,
R41, R42, R46, R47, R48, R49, R90,
R92, R100, R101, R102, R103, R104,
R105, R107, R108, R110, R111, R116,
R117, R118, R121, R144, R145, R147,
R148, R163, R169, R173
RES., OPTION, 0603
2 0 R122 RES., OPTION, 2512
3 0 C16, C17, C19, C31, C32, C35, C71, C73,
C77, C75, C86, C87
CAP., OPTION, 0603
4 1 L5 IND., 68μH, PWR, ±30%, 1.65A, 201mΩ, SMD
10.5 × 10.3 × 5.1mm
SUMIDA, CDRH105RNP-680NC
5 0 L7, L9 IND, OPTION 10.5mm × 10.3mm
6 3 D1, D2, D15 DIODE, SCHOTTKY, 100V, 1A, POWERDI-123 DIODES INC., DFLS1100-7
7 2 Q22, Q23 XSTR., MOSFET N-CHAN, 60V, 115mA, SOT-23 FAIRCHILD SEMI, 2N7002
8 0 Q27 XSTR., MOSFET, P-CH, 60V, 185mA, SOT-23 VISHAY, TP0610K-T1-GE3
9 3 Q20, Q28, Q29 XSTR., MOSFET, P-CH, 20V, 5.9A, TO-236
(SOT23-3)
VISHAY, SI2365EDS-T1-GE3
10 2 Q9, Q10 XSTR., PNP, 40V, 0.2A, SC70-3 DIODES, INC., MMST3906-F
DIODES, INC, MMST3906-7-F
11 1 Q19 XSTR., MOSFET N-CHAN, 60V, 30A, 8-PIN
TDSON EP
INFINEON, BSC014N06NS
12 2 D5, D6 LED, GREEN, COLORLESS DIFFUSED, 0603 OSRAM, LG L29K-G2J1-24-Z
PARTS LIST
12
DEMO MANUAL DC2595A
UG-1383 Rev. 0
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
13 3 D7, D13, D14 LED, RED, COLORLESS DIFFUSED, 0603 OSRAM, LS L29K-H1J2-1-Z
14 0 D8, D9, D12 LED, 0603 OPTIONAL
Hardware for Demo Board Only
1 2 J7, J12 CONN., RF, BNC, RCPT JACK, 5-PIN, STR, THT,
50Ω
AMPHENOL RF, 112404
2 1 J11 CONN., SHROUDED HDR, MALE, 2 × 6, 2mm,
VERT, STR, THT
FCI, 98414-G06-12ULF
3 1 J10 CONN., HDR, FEMALE, 2 × 7, 2mm, R/A THT SULLINS CONNECTOR SOLUTIONS,
NPPN072FJFN-RC
4 1 J9 CONN., HDR, MALE, 2 × 7, 2mm, R/A THT MOLEX, 0877601416
MOLEX, 87760-1416
5 5 JP1, JP2, JP3, JP5, JP6 CONN., HDR, MALE, 1 × 3, 2mm, VERT, STR, THT WURTH ELEKTRONIK, 62000311121
6 5 XJP1, XJP2, XJP3, XJP5, XJP6 CONN., SHUNT, FEMALE, 2 POS, 2mm WURTH ELEKTRONIK, 60800213421
7 28 E1, E2, E3, E4, E5, E6, E7, E8, E11, E14,
E16, E18, E20, E21, E22, E23, E24, E25,
E26, E27, E29, E30, E32, E35, E36, E37,
E38, E39
TEST POINT, TURRET, 0.094, MTG. HOLE MILL-MAX, 2501-2-00-80-00-00-07-0
8 2 SW1, SW2 SWITCH, SLIDE, DPDT, 0.3A, 6VDC, PTH C&K, JS202011CQN
9 12 J1, J_1, J_2, J2, J3, J_3, J4, J_4, J_5,
J5, J_6, J6
NUT, HEX, STEEL, ZINC PLATE,10-32 KEYSTONE, 4705
10 6 J1, J2, J3, J4, J5, J6 WASHER, FLAT, STEEL, ZINC PLATE, OD: 0.436
[11.1]
KEYSTONE, 4703
11 4 MH1, MH2, MH3, MH4 STANDOFF, NYLON, SNAP-ON, 0.50 KEYSTONE, 8833
12 6 J1, J2, J3, J4, J5, J6 STUD, FASTENER, #10-32 PENNENGINEERING, KFH-032-10ET
13 6 J1, J2, J3, J4, J5, J6 RING, LUG, CRIMP, #10, NON-INSULATED,
SOLDERLESS TERMINALS
KEYSTONE, 8205
PARTS LIST
13
DEMO MANUAL DC2595A
UG-1383 Rev. 0
SCHEMATIC DIAGRAM
5
4
3
2
1
DD
CC
B B
A A
OPT 0
50V
100
50V
100
2010
OPT
0
100
100
OPT
1nF
OPT 0
50V
OPT
2m
1. ALL RESISTORS AND CAPACITORS ARE 0603.
NOTE: UNLESS OTHERWISE SPECIFIED
OPT
1nF
0
OS-CON OS-CON
73437343
OS-CON 73437343
OPT
63V63V
OPT
50V
OS-CON
OPT
63V
OPT
2010
2m
2 FOR SINGLE OUTPUT CONFIGURATION.
22222222
Optional Resistors for Single Output Configuration
TSNS1
DRVCC
WP
SW1
ITHR0
TG0
SYNC
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
DRVCC
VDD25
VIN
VOUT1
VIN_PWR
VOUT0
VIN_PWR
VDD25
VOUT0
VOUT1
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
ITHR0
ITHR1
SW0
SW1
SW0A
SW1A
EXT_SUPPLY
VDD33
VDD25
VDD33
EXTVCC
EXTVCC
SIZE
DATE:
. VER. ON C I
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUITTHATMEETS 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 LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.SCALE = NONE
2
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
N/A LTC3889IUKG
DEMO CIRCUIT 2595A
WITH POWER SYSTEM MANAGEMENT
Tuesday, May 01, 2018
SIZE
DATE:
. VER. ON C I
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUITTHATMEETS 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 LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.SCALE = NONE
2
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
N/A LTC3889IUKG
DEMO CIRCUIT 2595A
WITH POWER SYSTEM MANAGEMENT
Tuesday, May 01, 2018
SIZE
DATE:
. VER. ON C I
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUITTHATMEETS 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 LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.SCALE = NONE
2
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
N/A LTC3889IUKG
DEMO CIRCUIT 2595A
WITH POWER SYSTEM MANAGEMENT
Tuesday, May 01, 2018
J2
GND
C27
10nF
C9 0.1uF
R20
E11
FAULT0B
R9
2
R34 OPT
C25
10uF
1210
R42
R51
E8
GND
E6
GND_SNS
E36
PG1
+
C14
120uF
C4
10nF
+
C1
56uF
63V
R32 OPT
R148
OPT
E1
GND
R48 OPT
R16 10K
R26
C38
2.2uF
C23 0.1uF
C88
10uF
63V
1210
R46 OPT
L7
OPT
R18 10K
R128 0
C22 4.7uF
1210
J1
VIN
36V - 54V
C39
4.7uF
16V
C21 4.7uF
1210
R49 OPT
C71 OPT
0805
Q3
BSC040N08NS5
1
2
5
3
4
R11 10K
E3
VIN
Q6
BSC072N08NS5
1
2
5
3
4
R41 OPT
Q1
BSC072N08NS5
1
2
5
3
4
L9
OPT
R39 OPT
E4
GND
J6
GND
C96 2.2uF
1206
R38 2
J5
VOUT1
24V / 20A
R15 10K
C33
10nF
C20
33pF
C7 4.7uF
1210
U1
LTC3889IUKG
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
DRVCC
44
VIN 48
IIN+ 47
IIN- 46
NC 45
NC 49
BG0 50
NC 51
BOOST0 52
Q5
BSC072N08NS5
1
2
5
3
4
E2
DRVCC
Q4
BSC040N08NS5
1
2
5
3
4
R40 OPT
R3
1k
R25 10K
C40
4.7uF
16V
R13 10K
J4
GND
E38
VDD25
C18
6.8nF
R4
1k
R30 2
C10
10uF
1210
R43
+
C87
OPT
R24
R23 10K
R27
0
R28 10K
+
C86
OPT
C13
C12
10uF
63V
1210
R36 OPT
R12 2
Q2
BSC072N08NS5
1
2
5
3
4
R37
C35
R10 10K
C36
33pF
C77 OPT
0805
E37
VDD33
R5
OPT
2512
R29 OPT
R90 OPT 0805
+
C17
R44
R35 OPT
R47
C93
10uF
63V
1210
+
C30
120uF
R14
R22
R92 OPT
0805
C19
C34
6.8nF
E22
FAULT1B
E35
PG0
L2
6.8uH
7443640680B
+
C16
R6
OPT
2512
R8
OPT
2512
R21
C94 10uF
100V1812
R122 OPT
2512
C28
E20
EXTVCC
E7
VOUT1_SNS
C24
10uF
63V1210
Q7
BSC040N08NS5
1
2
5
3
4
R121
OPT
R7
OPT
2512
C5
10nF
Q8
BSC040N08NS5
1
2
5
3
4
Q10
R19
D2
21
Q9
+
C29
120uF
C95 10uF
100V1812
R168 0
+
C85
56uF
63V
R118
OPT
R17
0
C37
2.2uF
R174 OPT
D1
21
R2 0.002
2512
1%
C26
10uF
1210
C97 2.2uF
1206
C11
10uF
63V
1210
+
C32
R173
OPT
C3
0.1uF
L1
6.8uH
7443640680B
R33 OPT
R169 OPT
E5
VOUT0_SNS
J3
VOUT0
12V / 20A
R45
0
C6 1nF
C8 4.7uF
1210
R129 0
R50
R31 OPT
+
C15
120uF
D15
2 1
+
C31
14
DEMO MANUAL DC2595A
UG-1383 Rev. 0
SCHEMATIC DIAGRAM
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
1GP0GP
48Hz,
Less Than 3% Duty Cycle
FAULT0B FAULT1B
5.5V
VIN
EXT_SUPPLY
EXT_SUPPLY
VOUT1
VOUT0
VOUT1
EXT_SUPPLY
VIN
VOUT0
+5V
VIN
+5V
+5V
VIN
3V3 VDD33
3V3 3V3
3V3
3V3 3V3
EXT_SUPPLY
PG1
ALERTB
PG0
FAULT1B
FAULT0B
VDD33
SIZE
DATE:
.VER.ON CI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
CUSTOMER NOTICE
LINEAR TECHNOLOGY 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 LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
2
2 3
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
N/A LTC3889IUKG
DEMO CIRCUIT 2595A
WITH POWER SYSTEM MANAGEMENT
Tuesday, May 01, 2018
SIZE
DATE:
.VER.ON CI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
CUSTOMER NOTICE
LINEAR TECHNOLOGY 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 LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
2
2 3
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
N/A LTC3889IUKG
DEMO CIRCUIT 2595A
WITH POWER SYSTEM MANAGEMENT
Tuesday, May 01, 2018
SIZE
DATE:
.VER.ON CI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
CUSTOMER NOTICE
LINEAR TECHNOLOGY 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 LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
2
2 3
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
N/A LTC3889IUKG
DEMO CIRCUIT 2595A
WITH POWER SYSTEM MANAGEMENT
Tuesday, May 01, 2018
C72
47nF
R132 0
R87
200
E14
PULSE IN
J7
1
2
3
4
5
R153 3.3 1%
E16
IOUT TST
Q29
SI2365EDS-T1-GE3
23
1
JP5
INT EXT
PULSE
1 3
2
J12
1
2
3
4
5
R91
0.01
1%
2010
R147
OPT
R158
27.4k
1%
Q19
BSC014N06NS
1
2
5
3
4
R162
0
1206
R172
127
R154
82.5 1%
Q22
2N7002A
2 3
1R146
4.7
0805
1%
R98 0
C74
2.2uF
100V
1210
C101
100nF
C81
220pF
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
1K
C80
100uF
16V
1210
U6 LT1803IS5
VOUT 1
V-
2
+IN
3-IN 4
V+
5
Q27
OPT
23
1
L5
68uH
SUMIDA CDRH105RNP-680NC
Q23
2N7002A
2 3
1
R170
340
R145
OPT
R97
10K
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
R151 1M
R157
2
C79
100uF
16V
1210
D13
RED
R89
10K
C102
1.0uF
C70
2.2uF
0805
D5
GREEN
R88
200
U5 LTC6992IS6-1
MOD
1
GND
2
SET
3DIV 4
V+ 5
OUT 6
E39
EXT_SUPPLY
E21
GND
C75
OPT
1210
D7
RED
Q28
SI2365EDS-T1-GE3
23
1
R161
20K
JP6
OFF
ON
PULSE GEN
13
2
C78
220nF
100V
0805
D6
GREEN
C103
2.2uF
0805
D14
RED
R152
681K
1%
R93
127
JP1
ON
OFF
EXT_SUPPLY 5.5V
13
2
R171
127
C76
0.1uF
R101
OPT
15
DEMO MANUAL DC2595A
UG-1383 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
CC
B B
A A
ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN
TO DC1613A
ON
OFF
ON
OFF
RUN0RUN1
FAULT0B-FAULT1B
RUN0-RUN1
EESDA
EESCL
AUXVCC
EEWP VIN
3V3
VDD33 VDD33
3V3
SYNC
SHARE_CLKALERTB SDA SCL
RUN0
RUN1
FAULT1B
FAULT0B
VDD33
SIZE
DATE:
.VER.ON CI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
CUSTOMER NOTICE
LINEAR TECHNOLOGY 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 LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
2
3 3
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
N/A LTC3889IUKG
DEMO CIRCUIT 2595A
WITH POWER SYSTEM MANAGEMENT
Monday, January 08, 2018
SIZE
DATE:
.VER.ON CI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
CUSTOMER NOTICE
LINEAR TECHNOLOGY 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 LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
2
3 3
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
N/A LTC3889IUKG
DEMO CIRCUIT 2595A
WITH POWER SYSTEM MANAGEMENT
Monday, January 08, 2018
SIZE
DATE:
.VER.ON CI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
CUSTOMER NOTICE
LINEAR TECHNOLOGY 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 LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
2
3 3
HIGH VOLTAGE DUAL STEP-DOWN DC/DC CONVERTER
N/A LTC3889IUKG
DEMO CIRCUIT 2595A
WITH POWER SYSTEM MANAGEMENT
Monday, January 08, 2018
R102 OPT
R105
OPT
R104 OPT
J9 DEMO HEADER (M)
FAULTB 1
CTRL 2
ALERTB 3
SDA 4
SHARE_CLK 5
SCL 6
RESETB 7
AUXP 8
UNUSED 9
UNUSED 10
GND 11
GND 12
12V 13
12V 14
E30
RUN1
R115
10
SW1
1
2
3
4
5
6
R114
10
U4
24LC025-I/ST
A0
1
A1
2
A2
3
VSS
4SDA 5
SCL 6
WP 7
VCC 8
E24
SDA
D12
OPT
JP3
NCC
13
2
R119
4.99K
R103
OPT
E23
ALERTB
R112
10K
C84
100nF
E25
SCL
R106 0
R120
4.99K
JP2
NCC
13
2
E32
SGND
R113
10K
R111 OPT
R109
0
E26
SHARE_CLK
R107
OPT
1206
R116 OPT
J11
AUXP 1
SDA 2
GND 3
SCL 4
LGKPWR 5
ALERTB 6
GPIO_1 7
OUTEN_0 8
OUTEN_1 9
GND 10
AUXSCL 11
AUXSDA 12
R108
OPT
SW2
1
2
3
4
5
6
D9
OPT
R110
OPT
J10 DEMO HEADER (F)
FAULTB
1
CTRL
2
ALERTB
3
SDA
4
SHARE_CLK
5
SCL
6
RESETB
7
AUXP
8
UNUSED
9
UNUSED
10
GND
11
GND
12
12V
13
12V
14
R117 OPT
E27
SYNC
C82
10nF
C83
10nF
E29
RUN0
16
DEMO MANUAL DC2595A
UG-1383 Rev. 0
ANALOG DEVICES, INC. 2019
UG17044-0-02/19(0)
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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Board until you have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you (“Customer”)
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