1
dc2394af
DEMO MANUAL DC2394A
DESCRIPTION
LTC3887EUJ-1
Dual Output PolyPhase Step-Down DC/DC
Converter with Digital Power System Management
Demonstration circuit 2394A is a high current, high
efficiency, dual output PolyPhase
®
synchronous buck
converter featuring the LT C
®
3887EUJ-1, a dual-phase
current mode controller. The LTC3887-1 has the PMBus
interface and the power system management functions.
This demo board uses DrMOS devices in the power stage
and operates over an input voltage range from 7V to 14V.
The output voltage can be programmed from 0.8V to 1.8V
(1V by default) with an output current of up to 30A per
phase. The DC2394A is configured as dual output with
DCR current sensing. It also has an on-board dynamic
load circuit, which makes it easy to evaluate the transient
performance.
The DC2394A powers up to default settings and produces
power based on configuration resistors or with the con-
figuration file loaded on its onboard EEPROM without
the need for any serial bus communication. This allows
easy evaluation of the DC/DC converter. To fully explore
PERFORMANCE SUMMARY
the extensive power system management features of the
LTC3887-1, 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 DOWNLOAD
The software can be downloaded from:
http://www.linear.com/ltpowerplay
For more details and instructions of L
TpowerPlay, please
refer to “LTpowerPlay for LTC3880 Quick Start Guide”.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2394A
L, LT, LTC, LTM, Linear Technology, PolyPhase, LTpowerPlay and the Linear logo are
registered trademarks of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
Specifications are at TA = 25°C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Supply Range 7 12 14 V
FSW Factory Default Switching 350 kHz
VOUT0 CH0 Output Voltage Range IOUT0 = 0A TO 30A, VIN = 7.0V to 14V 0.8 1.0 1.8 V
IOUT0 CH0 Output Current Range 0 30 A
EFF CH0 Full Load Efficiency VIN = 12V, VOUT0 = 1.0V, See Figures 4. 88.3 %
VOUT1 CH1 Output Voltage Range IOUT1 = 0A TO 30A, VIN = 7.0V to 14V 0.8 1.0 1.8 V
IOUT1 CH1 Output Current Range 0 30 A
EFF CH1 Full Load Efficiency VIN = 12V, VOUT1 = 1.0V, See Figures 4. 88.3 %
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dc2394af
DEMO MANUAL DC2394A
QUICK START PROCEDURE
Demonstration circuit 2394A makes it easy to set up to
evaluate the performances of the. Refer to Figure 2 for
proper measurement equipment setup and follow the
procedure below:
NOTE: Normal note text normal note text normal note text
normal note text.
1. Make sure jumpers are in the following positions:
JUMPER POSITION FUNCTION
JP1 NC GPIO0B to GPIO1B
JP2 NC RUN0 to RUN1
JP3 INT INT/EXT PULSE
JP4 OFF EXTVCC_DRV
JP5 OFF PULSE GENERATOR
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. Turn on the power at the input.
NOTE. Make sure that the input voltage does not exceed 15V.
5. Turn on both SW2 (for RUN0), and SW1 (for RUN1)
switches as desired.
6. Check for the correct output voltage from VOUT0+ (E6)
to VOUT0– (E7) for CH0, VOUT1 (E8) to GND (E9) for
CH1. VOUT0/VOUT1 = 1.0V ± 0.5% (1.005V ~ 0.995V)
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.
CONNECTING A PC TO DC2394A
You can use a PC to reconfigure the power management
features of the LTC3887-1 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.
Figure 1. Demo Setup with PC
VOUT0
VOUT1
12-PIN
CONNECTOR
USB CABLE VIN
+12V
POWER SUPPLY
LOAD
LOAD
USB TO I2C/PMBus
DONGLE DC1613A
LTC3887-1 DEMO
BOARD DC2394A
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dc2394af
DEMO MANUAL DC2394A
QUICK START PROCEDURE
Figure 2. Power Test Setup
+–
+–
+–
VOUT1
LOAD
VOUT1
VOUT0
IOUT1
SHUNT
VOUT0
LOAD
+
–
+
–
IOUT0
SHUNT
IIN
VIN POWER
SUPPLY
RUN1
SW1
RUN0
SW2
+
–
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dc2394af
DEMO MANUAL DC2394A
QUICK START PROCEDURE
MEASURING EFFICIENCY
To accurately measure efficiency of any configuration, do
the following:
n Set JP4 to OFF position to disable the auxiliary
circuits.
n Apply external 5V for VDR; record voltage and current;
n Measure VIN across the input ceramic capacitor (C4
for CH0, C31 for CH1). Measure VOUT across the out-
put ceramic capacitor (C14 for CH0, C36 for CH1).
Add external 5V loss into efficiency calculation.
MEASURING OUTPUT RIPPLE VOL
TAGE
An accurate ripple measurement may be performed by
using the below configuration across C14 for CH0, C36
for CH1.
Figure 3. Measuring Output Voltage Ripple
Figure 4. Typical Efficiency Curve of DC2394A, VIN = 12V, FSW = 350kHz
OUTPUT LOAD CURRENT (A)
0
EFFICIENCY (%)
95
90
80
85
75 15 279 21
DC2394 F04
3012 246 183
VO = 1.0V
VO = 1.5V
VIN = 12V
fSW = 350kHz
+ –
VOUT GND
COUT
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dc2394af
DEMO MANUAL DC2394A
QUICK START PROCEDURE
Figure 5. Load Transient Waveform of DC2394A, VIN=12V, VOUT0=1.0V, FSW=350kHz, 75% to 100% (7.5A) Load Step
Figure 6. Thermal Picture of DC2394A, VIN=12V, VOUT0= VOUT1=1.0V, IOUT0=IOUT1=30A, FSW=350kHz, No Airflow, TA=25°C
50µs/DIV
VOUT0
20mV/DIV
IOUT0
5A/DIV
DC2394 F05
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dc2394af
DEMO MANUAL DC2394A
LTpowerPlay SOFTWARE GUI
Figure 7. LTpowerPlay Main Interface*
* NOTE: In LTpowerPlay, LTC3887 and LTC3887-1 use the same template.
LTpowerPlay is a powerful Windows based development
environment that supports Linear Technology
®
power
system management ICs, including the LTC3880, LTC3883,
LTC3882, LTC3887 and LTC3887-1. 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 mul-
tichip 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 LTC3887-1’s
DC2394A demo system, or a customer board. The soft-
ware also provides an automatic update feature to keep
the software current with the latest set of device drivers
and documentation. The L
TpowerPlay 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 LT-
powerPlay menu.
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dc2394af
DEMO MANUAL DC2394A
LTpowerPlay QUICK START PROCEDURE
The following procedure describes how to use LTpowerPlay
to monitor and change the settings of LTC3887-1.
1. Download and install the LTpowerPlay GUI:
http://www.linear.com/ltpowerplay
2. Launch the LTpowerPlay GUI.
a. The GUI should automatically identify the DC2394A.
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 corner, confirming that the LTC3887-1
is communicating:
c. In the Toolbar, click the “R” (RAM to PC) icon to read the
RAM from the LTC3887-1. This reads the configuration
from the RAM of LTC3887-1 and loads it into the GUI.
d. If you want to change the output voltage to a different
value, like 1.5V. In the Config tab, type in 1.5 in the
VOUT_COMMAND box, like this:
Then, click the “W” (PC to RAM) icon to write these
register values to the LTC3887-1. After finishing this
step, you will see the output voltage will change to 1.5V.
If the write is successful, you will see the following
message:
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dc2394af
DEMO MANUAL DC2394A
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 4 C4, C6, C31, C33 CAP., 22µF, X5R, 16V, 10%, 1210 MURATA, GRM32DR61C226KE18L
2 5 C5, C13, C39, C49, C51 CAP., 1µF, X5R, 16V, 10%, 0603 MURATA, GRM188R61C105KA93D
3 2 C7, C8 CAP., OS-CON, 330µF, 16V, 20%, F12 PANASONIC ELECTRONIC, 16SVP330M
4 4 C9, C18, C44, C47 CAP., 0.1µF, X7R, 16V, 10%, 0603 MURATA, GRM188R71C104KA01D
5 3 C10, C11, C56 CAP., 4.7µF, X5R, 16V, 10%, 0603 MURATA, GRM188R61C475KAAJD
6 12 C14, C15, C21, C22, C35, C36, C42, C43,
C58, C59, C60, C61
CAP., X5R, 100µF, 6.3V, 20%, 1210 MURATA, GRM32ER60J107ME20L
7 8 C16, C17, C19, C20, C37, C38, C40, C41 CAP., POSCAP, 470µF, 2.5V, D2E SIZE PANASONIC ELECTRONIC, 2R5TPE470M9
8 2 C23, C24 CAP., X7R, 2200pF, 25V, 10%, 0603 MURATA, GRM188R71E222KA01D
9 3 C28, C29, C50 CAP., NPO, 150pF, 50V, 5%, 0603 MURATA, GRM1885C1H151JA01D
10 2 L1, L2 IND., 0.17µH PULSE., PA1320.171NL
11 2 R1, R12 RES., 24.9k, 1/16W, 1%, 0402 VISHAY, CRCW040224K9FKED
12 2 R2, R67 RES., 2Ω, 1/10W, 1%, 0603 VISHAY, CRCW06032R00FKEA
13 4 R3, R4, R16, R17 RES., 1k, 1/16W, 1%, 0402 VISHAY, CRCW04021K00FKED
14 2 R5, R18 RES., 0Ω, 1/16W, 0402 VISHAY, CRCW04020000Z0ED
15 4 R7, R8, R24, R25 RES., 2k, 1/10W, 1%, 0603 VISHAY, CRCW06032K00FKEA
16 6 R10, R13, R26, R49, R52, R55 RES., 0Ω, 1/10W, 0603 VISHAY, CRCW06030000Z0EA
17 2 R14, R15 RES., 17.8k, 1/10W, 1%, 0603 VISHAY, CRCW060317K8FKEA
18 2 U1, U3 I.C., MODULE, 60A, 31-LEAD, CLIP BOND
PQFN, SPS, 5.0X5.0mm
FAIRCHILD SEMI., FDMF5820DC
19 1 U2 I.C., LTC3887-1EUJ#PBF, QFN, 6X6mm LINEAR TECH., LTC3887EUJ-1#10E4-1PBF-ES
20 1 U4 I.C., EEPROM SERIAL-I2C, 2k-BIT, TSSOP-8 MICROCHIP, 24LC025-I/ST
21 1 U5 I.C., LTC6992CS6-1, TSOT-23 LINEAR TECH., LTC6992CS6-1#PBF
22 1 U6 I.C., LT1803IS5, TSOT-23 LINEAR TECH., LT1803IS5#PBF
23 2 U7, U8 I.C., LT1129CS8-5, S8 LINEAR TECH., LT1129CS8-5#PBF
Additional Demo Board Circuit Components
1 4 C1, C2, C25, C26, CAP., 1µF, X5R, 16V, 10%, 0402 MURATA, GRM155R61C105KE01D
2 4 C3, C12, C27, C34, CAP., 0.1µF, X5R, 16V, 10%, 0402 MURATA, GRM155R61C104KA88D
3 4 C30, C32, C45, C46 CAP., X7R, 0.01µF, 16V, 10%, 0603 MURATA, GRM188R71C103KA01D
4 2 C48, C55 CAP., X5R, 2.2µF, 16V, 10%, 0805 MURATA, GRM21BR61C225KA88L
5 1 C52 CAP., 4.7µF, X5R, 16V, 1206 MURATA, GRM31CR61C475KA01L
6 1 C53 CAP., 1µF, X7R, 16V, 10%, 0805 MURATA, GRM21BR71C105KA01L
7 2 C54, C57 CAP., 1µF, X5R, 16V, 10%, 1206 MURATA, GRM31MR61C105KA01L
LTpowerPlay QUICK START PROCEDURE
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. Name it whatever
you want.
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dc2394af
DEMO MANUAL DC2394A
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
8 0 D3, D4 IND., OPTIONAL SOD-323
9 2 D1, D2 SMT CHIP LED, GREEN WURTH ELEKTRONIK, 150060GS75000
10 1 D5 SMT CHIP LED, RED WURTH ELEKTRONIK, 150060RS75000
11 2 Q1, Q2 TRANS., PNP 40V 0.2A SC75-3 SOT-416 ON SEMI., MMBT3906TT1G
12 2 Q3, Q4 MOSFET, N-CH 60V 115MA SOT23-3 DIODES INC., 2N7002-7-F
13 2 Q5, Q7 MOSFET, P-CH 20V 0.58A SOT-23 VISHAY, SI2365EDS-T1-GE3
14 1 Q6 MOSFET, SPEED SRS 30V 30A LFPAK RENESAS, RJK0305DPB-02#J0
15 0 R6, R11, R21, R22, R23, R28, R30, R31,
R33, R34, R36, R37, R39, R40, R45, R48,
R50, R54, R56, R57, R62, R64, R65, R68
RES., OPTIONAL 0603
16 11 R19, R20, R27, R29, R32, R35, R38, R51,
R53, R60, R61
RES., 4.99k, 1/10W, 1%, 0603 VISHAY, CRCW06034K99FKEA
17 2 R46, R47 RES., 200Ω, 1/10W, 1%, 0603 VISHAY, CRCW0603200RFKEA
18 3 R58, R59, R77 RES., 10Ω, 1/10W, 1%, 0603 VISHAY, CRCW060310R0FKEA
19 1 R63 RES., 127Ω, 1/10W, 1%, 0603 VISHAY, CRCW0603127RFKEA
20 1 R66 RES., SENSE, 0.001Ω, 1W, 1%, 2512 PANASONIC, ERJM1WTF1M0U
21 2 R69, R76 RES., 20k, 1/10W, 1%, 0603 VISHAY, CRCW060320K0FKEA
22 2 R70, R81 RES., 100k, 1/10W, 1%, 0603 VISHAY, CRCW00603100KFKEA
23 1 R71 RES., 3.3Ω, 1/10W, 1%, 0603 VISHAY, CRCW06033R30FKEA
24 1 R72 RES., CHIP, 1M, 1%, 0603 VISHAY, CRCW06031M00FKEA
25 1 R73 RES., 154k, 1/10W, 1%, 0603 VISHAY, CRCW0603154KFKEA
26 2 R74, R82 RES., 10k, 1/10W, 1%, 0603 VISHAY, CRCW060310K0FKEA
27 1 R75 RES., 82.5Ω, 1/10W, 1%, 0603 VISHAY, CRCW060382R5FKEA
28 1 R78 RES., 681k, 1/10W, 1%, 0603 VISHAY, CRCW0603681KFKEA
29 1 R79 TRIMMER, 5kΩ 0.5W PC PIN BOURNS, 3386P-1-502LF
30 1 R80 RES., SENSE, 0.01Ω, 1W, 1%, 2512 PANASONIC, ERJM1WSF10MU
31 1 R83 RES., 15.8k, 1/10W, 1%, 0603 VISHAY, CRCW060315K8FKEA
Hardware: For Demo Board Only
1 21 E1-E21 TEST POINT, TURRET, .064" MTG. HOLE MILL-MAX, 2308-2-00-80-00-00-07-0
2 2 SW1, SW2 SWITCH, SLIDE DPDT 6VDC 0.3A PCMNT C&K COMPONENTS, JS202011CQN
3 5 JP1-JP5 CONN., HEADER, 1X3, 2mm WURTH ELEKTRONIK, 62000311121
4 2 J1, J2 JACK, BANANA KEYSTONE, 575-4
5 8 J3-J6 (x 2) STUD, TEST PIN PEM KFH-032-10
68 J3-J6 (x 2) NUT, BRASS 10-32 ANY, #10-32M/S
7 4 J3-J6 RING, LUG #10 KEYSTONE, 8205
8 4 J3-J6 WASHER, TIN PLATED BRASS ANY, #10
9 1 J7 CONN. HEADER 12 POS 2mm STR DL PCB FCI, 98414-G06-12ULF
10 1 J8 CONN., HEADER, 2X7, 2mm, R/A (M) MOLEX, 87760-1416
11 1 J9 CONN., HEADER, 2X7, 2mm, R/A (F) SULLINS, NPPN072FJFN-RC
12 3 J10, J11, J12 CONN, BNC, 5 PINS CONNEX, 112404
13 3 XJP1, XJP2, XJP5 SHUNT, 2mm WURTH ELEKTRONIK, 60800213421
14 4 MT1, MT2, MT3, MT4 STANDOFF, NYLON, SNAP-ON, 0.500" WURTH ELEKTRONIK, 702936000
10
dc2394af
DEMO MANUAL DC2394A
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
7V-14V
16V 16V
2. INSTALL SHUNTS AS SHOWN.
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
NOTE: UNLESS OTHERWISE SPECIFIED
1210 1210
1210 1210
1210 1210
1210 1210
1.0V/30A
1.0V/30A
1210 1210
1210 1210
VIN
VIN
VIN
VDR
VDR
VDR
VDR
VDR
VDR
VDD33VDD25
INTVCC
VDD33
VDD25
VSENSE0+
VSENSE0-
VSENSE1
SYNC
SCL
SDA
ALERTB
GPIO0B
GPIO1B
RUN0
RUN1
SHARE_CLK
SYNC
SCL
SDA
ALERTB
GPIO0B
GPIO1B
SHARE_CLK
FREQ_CFG
PHAS_CFG
ASEL1
VOUT0_CFG
ASEL0
VOUT1_CFG
VSENSE1
VSENSE0+
VSENSE0-
VSENSE1
VOUT0
VOUT1
PWM0
PWM1
REVISION HISTORY
DESCRIPTION DATE
APPROVED
ECO REV
YI S. / H. Wu
PRODUCTION 51-81-111
__
REVISION HISTORY
DESCRIPTION DATE
APPROVED
ECO REV
YI S. / H. Wu
PRODUCTION 51-81-111
__
REVISION HISTORY
DESCRIPTION DATE
APPROVED
ECO REV
YI S. / H. Wu
PRODUCTION 51-81-111
__
SIZE
DATE:
.VER.ON CI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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
www.linear.com
1
Wednesday, November 18, 2015
1 2
HIGH DENSITY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
HZ
YI S.
N/A
LTC3887-1EUJ
DC2394A
SIZE
DATE:
.VER.ON CI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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
www.linear.com
1
Wednesday, November 18, 2015
1 2
HIGH DENSITY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
HZ
YI S.
N/A
LTC3887-1EUJ
DC2394A
SIZE
DATE:
.VER.ON CI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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
www.linear.com
1
Wednesday, November 18, 2015
1 2
HIGH DENSITY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
HZ
YI S.
N/A
LTC3887-1EUJ
DC2394A
R6 OPT
R12
25K
C30
0.01uF
R15
17.8K
J2
GND
C27
0.1uF
Q1
MMBT3906LT
R18 0
C25
1uF
U2
LTC3887-1EUJ
VSENSE0+ 1
VSENSE0- 2
ISNS1+ 3
ISNS1- 4
ITH0
5
ISNS0+ 6
ISNS0- 7
SYNC
8
SCL
9
SDA
10
ALERT
11
GPIO0
12
GPIO1
13
RUN0
14
RUN1
15
ASEL0
16
ASEL1
17
VOUT0_CFG
18
VOUT1_CFG
19
FREQ_CFG
20
PHAS_CFG
21 VDD25 22
WP
23
SHARE_CLK
24
VDD33 25
ITH1
26
VSENSE1 27
TSNS1
28
NC 29
PWM1 30
VCC1 31
NC 32
INTVCC 33
PGND
34
VIN 35
NC 36
VCC0 37
PWM0 38
NC 39
TSNS0
40
GND
41
C9
0.1uF
E4
VIN
J1
VIN
R31 OPT
L2
0.17uH
L1
0.17uH
+
C20
OPT
J4
GND
C33
22uF
1210
C36
100uF
E8
VOUT1
C2
1uF
+
C19
OPT
E7
VOUT0-
R38 5K
R21 OPT
C12 100nF
C11
4.7uF
C60
100uF
R14
17.8K
C23
2200pF
R36 OPT
R39 OPT
R5 0
TP3
C43
100uF
C44 100nF
C14
100uF
C10
4.7uF
C26
1uF
R34 OPT
R11 OPT
R35 5K
R10 0
C1
1uF
R27 5K
C42
100uF
R26 0
+
C8
330uF
C6
22uF
1210
+
C7
330uF
R13 0
E2
VDD25
+
C41
470uF
C22
100uF
C29
150pF
R28 OPT R25
2k
TP2
C13
1uF
GL
AGND VIN
PGND
U3 FDMF5820DC
PWM
1
ZCD#
2
VCC 3
AGND 4
BOOT 5
NC 6
PHASE 7
VIN 8
VIN 9
VIN 10
VIN 11
PGND
12
PGND
13
PGND
14
SW 16
SW 17
SW 18
SW 19
SW 20
SW
21
SW
22
SW
23
SW
24
SW
25
SW
26
GL
27
PGND
15
TMON 30
EN/FAULT#
31
AGND 32
PGND
34
GL
35
VIN 33
PGND
28
PVCC 29
E9
GND
E3
VDD33
GL
AGND VIN
PGND
U1 FDMF5820DC
PWM
1
ZCD#
2
VCC 3
AGND 4
BOOT 5
NC 6
PHASE 7
VIN 8
VIN 9
VIN 10
VIN 11
PGND
12
PGND
13
PGND
14
SW 16
SW 17
SW 18
SW 19
SW 20
SW
21
SW
22
SW
23
SW
24
SW
25
SW
26
GL
27
PGND
15
TMON 30
EN/FAULT#
31
AGND 32
PGND
34
GL
35
VIN 33
PGND
28
PVCC 29
R17 1K
R24
2k
R30 OPT
C61
100uF
R16 1K
+
C17
470uF
R7
2k
+
C40
470uF
C5
1uF
R22 OPT
C15
100uF
C31
22uF
1210
C32
0.01uF
E6
VOUT0+
+
C16
470uF
J3
VOUT0
R37 OPT
R40 OPT
C59
100uF
Q2
MMBT3906LT
C3
0.1uF
C28
150pF
C35
100uF
R1
25K
R32 5K
C34 100nF
E1
INTVCC
R33 OPT
J6
GND
R29 5K
+
C38
470uF
C39
1uF
C24
2200pF
R4 1K
R20 5K
R8
2k
C58
100uF
R3 1K
R23 OPT
C4
22uF
1210
C18 100nF
R2 2
R19 5K
E5
GND
+
C37
470uF
J5
VOUT1
C21
100uF
11
dc2394af
DEMO MANUAL DC2394A
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 representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
70Hz, 3% Duty Cycle
INTEXT
INT / EXT PULSE
1% 0805
IOUT
TST
VOUT0
LOAD
STEP
VOUT1
CN C
GPIO0-GPIO1
TO DC1613A
ON
OFF
ON
OFF
RUN0RUN1
1206
CN C
RUN0-RUN1
VDR
DrMOS
ON
OFF
GPIO0BGPIO1B
GENERATOR
PULSE
ON
OFF
ALERTB
AUXVCC
EEWP
EESDA
EESCL
+5V
+5V
VDD33
VDD33
3V3
VIN
3V3
VDR
VIN
3V3 3V3
3V3
3V3
VIN
VDD33
+5V
VIN
ALERTB SDA SCL
RUN0
RUN1
GPIO1B
GPIO0B
SYNC
SHARE_CLK
GPIO1B
GPIO0B
RUN1
RUN0
ALERTB
GPIO0B
GPIO1B
VOUT0
VOUT1
VOUT0
VOUT1
SIZE
DATE:
.VER.ON CI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGYFax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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
www.linear.com
1
Wednesday, November 18, 2015
2 2
HIGH DENSITY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
HZ
YI S.
N/A
LTC3887-1EUJ
DC2394A
SIZE
DATE:
.VER.ON CI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGYFax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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
www.linear.com
1
Wednesday, November 18, 2015
2 2
HIGH DENSITY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
HZ
YI S.
N/A
LTC3887-1EUJ
DC2394A
SIZE
DATE:
.VER.ON CI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGYFax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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
www.linear.com
1
Wednesday, November 18, 2015
2 2
HIGH DENSITY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
HZ
YI S.
N/A
LTC3887-1EUJ
DC2394A
R70
100K
R66
0.001
2512
R73
154K R75
82.5
E15
GPIO1B
C57
1uF
SW1
1
2
3
4
5
6
R77
10
Q4
2N7002A
2 3
1
E21
GND
D4
OPT
E14
SYNC
C45
10nF
E10
ALERTB
J10
1
2
3
4
5
C49
1uF
0603
C48
2.2uF
0805
R71
3.3
D2
GRN
21
R62
OPT
C54
1uF
R80
0.01
2512
JP2
1
2
3
JP3
1
2
3
C55
2.2uF
0805
R72
1M
R83
15.8K
R78
681K
R61
4.99K
C47
100nF
R57
OPT
R68
OPT
2512
R52
0
Q7
TP0101K
2
3
1
R60
4.99K
Q5
TP0101K
23
1
C50
150pF
C46
10nF
E18
GND
D3
OPT
E20
VDR
E17
EXT PULSE
J9
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
E19
GND
U5 LTC6992-1
MOD
1
GND
2
SET
3DIV 4
V+ 5
OUT 6
R64
OPT
E13
SHARE_CLK
C53
1uF
J11
1
2
3
4
5
R47
200
E16
GPIO0B
JP5
1
2
3
R53
5K
D5
RED
21
R54
OPT
R55
0
R65
OPT
R48
OPT
R58
10
R81
100K
Q6
RJK0305DPB
1
2
5
3
4
R67
2
SW2
1
2
3
4
5
6
D1
GRN
21
U8
LT1129CS8-5
OUTPUT 1
SENSE/ADJ 2
GND 3
NC 4
SHDN
5
GND
6
GND
7
VIN
8
R50
OPT
JP4
1
2
3
R76
20K
R79
5K
C52
4.7uF
Q3
2N7002A
2 3
1
R63
127
C56
4.7uF
R45
OPT
U6
LT1803IS5
VOUT 1
V-
2
+IN
3-IN 4
V+
5
R74
10K
R82
10K
U4
24LC025-I/ST
A0
1
A1
2
A2
3
VSS
4SDA 5
SCL 6
WP 7
VCC 8
R49
0
U7
LT1129CS8-5
OUTPUT 1
SENSE/ADJ 2
GND 3
NC 4
SHDN
5
GND
6
GND
7
VIN
8
E11
SDA
J8
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
J12
1
2
3
4
5
J7
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
E12
SCL
R51
5K
C51
1uF
0603
R56
OPT
R69
20K
R46
200
JP1
1
2
3
R59
10
12
dc2394af
DEMO MANUAL DC2394A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2016
LT 0116 • PRINTED IN USA
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
