DC2394A - Demo Manual

DEMO MANUAL DC2394A
LTC3887EUJ-1
Dual Output PolyPhase Step-Down DC/DC
Converter with Digital Power System Management
Description
Demonstration circuit 2394A is a high current, high
efficiency, dual output PolyPhase® synchronous buck
converter featuring the LTC®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 configuration 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
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, current, temperature and fault status.
GUI DOWNLOAD
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/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.
Performance Summary
Specifications are at TA = 25°C
SYMBOL
PARAMETER
CONDITIONS
VIN
Input Supply Range
FSW
Factory Default Switching
VOUT0
CH0 Output Voltage Range
IOUT0
CH0 Output Current Range
MIN
TYP
MAX
7
12
14
350
IOUT0 = 0A TO 30A, VIN = 7.0V to 14V
0.8
1.0
0
EFF
CH0 Full Load Efficiency
VIN = 12V, VOUT0 = 1.0V, See Figures 4.
VOUT1
CH1 Output Voltage Range
IOUT1 = 0A TO 30A, VIN = 7.0V to 14V
IOUT1
CH1 Output Current Range
EFF
CH1 Full Load Efficiency
1.0
0
VIN = 12V, VOUT1 = 1.0V, See Figures 4.
88.3
V
kHz
1.8
V
30
A
88.3
0.8
UNITS
%
1.8
V
30
A
%
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1
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
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
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.
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, 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.
+12V
POWER SUPPLY
USB CABLE
USB TO I2C/PMBus
DONGLE DC1613A
VIN
12-PIN
CONNECTOR
VOUT0
LOAD
LTC3887-1 DEMO
BOARD DC2394A
LOAD
VOUT1
Figure 1. Demo Setup with PC
2
dc2394af
DEMO MANUAL DC2394A
Quick Start Procedure
VOUT1
+
RUN1
SW1
+
+
–
+
VIN
–
IIN
–
–
IOUT1
SHUNT
IOUT0
SHUNT
VOUT1
LOAD
POWER
SUPPLY
VOUT0
LOAD
+
–
VOUT0
+
RUN0
SW2
–
Figure 2. Power Test Setup
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3
DEMO MANUAL DC2394A
Quick Start Procedure
MEASURING EFFICIENCY
nn
To accurately measure efficiency of any configuration, do
the following:
Set JP4 to OFF position to disable the auxiliary
circuits.
nn Apply external 5V for VDR; record voltage and current;
Measure VIN across the input ceramic capacitor (C4
for CH0, C31 for CH1). Measure VOUT across the output ceramic capacitor (C14 for CH0, C36 for CH1).
Add external 5V loss into efficiency calculation.
nn
+
MEASURING OUTPUT RIPPLE VOLTAGE
An accurate ripple measurement may be performed by
using the below configuration across C14 for CH0, C36
for CH1.
–
COUT
VOUT
GND
Figure 3. Measuring Output Voltage Ripple
95
VIN = 12V
fSW = 350kHz
EFFICIENCY (%)
90
85
80
VO = 1.0V
VO = 1.5V
75
0
3
6 9 12 15 18 21 24 27 30
OUTPUT LOAD CURRENT (A)
DC2394 F04
Figure 4. Typical Efficiency Curve of DC2394A, VIN = 12V, FSW = 350kHz
4
dc2394af
DEMO MANUAL DC2394A
Quick Start Procedure
VOUT0
20mV/DIV
IOUT0
5A/DIV
50µs/DIV
DC2394 F05
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
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5
DEMO MANUAL DC2394A
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 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 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 LTC3887-1’s
DC2394A 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 7. LTpowerPlay Main Interface*
* NOTE: In LTpowerPlay, LTC3887 and LTC3887-1 use the same template.
6
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
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:
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.
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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7
DEMO MANUAL DC2394A
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.
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
8
dc2394af
DEMO MANUAL DC2394A
Parts List
ITEM
QTY
REFERENCE
PART DESCRIPTION
8
9
MANUFACTURER/PART NUMBER
0
D3, D4
IND., OPTIONAL SOD-323
2
D1, D2
SMT CHIP LED, GREEN
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, RES., OPTIONAL 0603
R33, R34, R36, R37, R39, R40, R45, R48,
R50, R54, R56, R57, R62, R64, R65, R68
16
11
R19, R20, R27, R29, R32, R35, R38, R51, RES., 4.99k, 1/10W, 1%, 0603
R53, R60, R61
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
WURTH ELEKTRONIK, 150060GS75000
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
6
8
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
dc2394af
9
A
B
C
D
VIN
VDD33
GND
GND
7V-14V
E4
E5
J2
R38 5K
R35 5K
R32 5K
R29 5K
R27 5K
R20 5K
R19 5K
C28
150pF
R11 OPT
5
R14
17.8K
C23
2200pF
+
RUN1
RUN0
GPIO1B
GPIO0B
ALERTB
SDA
SCL
SYNC
C8
330uF
16V
R15
17.8K
C24
2200pF
SYNC
SHARE_CLK
GPIO1B
GPIO0B
ALERTB
SDA
SCL
R2
VDD25
2
C30
0.01uF
R39 OPT
R36 OPT
R33 OPT
R30 OPT
R28 OPT
R21 OPT
Q2
MMBT3906LT
SHARE_CLK
+
Q1
MMBT3906LT
C29
150pF
C7
330uF
16V
VIN
TSNS0
TSNS1
ITH0
ITH1
WP
R23 OPT
R40 OPT
R37 OPT
R34 OPT
R31 OPT
4.7uF
C10
INTVCC
SHARE_CLK
RUN1
RUN0
GPIO1
GPIO0
ALERT
SDA
SCL
SYNC
R22 OPT
C32
0.01uF
40
28
5
26
23
24
15
14
13
12
11
10
9
8
C9
0.1uF
ASEL0
16
J1
35
VIN
ASEL1
17
33
4
VDD25
U2
LTC3887-1EUJ
1uF
C5
VDD25
INTVCC
E2
VSENSE1
ISNS1-
ISNS1+
PWM1
NC
NC
NC
NC
VSENSE0-
VSENSE0+
ISNS0-
ISNS0+
PWM0
VSENSE1
35
27
2
31
1
27
4
3
30
36
39
29
32
2
VDR
TP3
VSENSE1
OPT
VSENSE0-
R17 1K
R16 1K
VDR
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
2. INSTALL SHUNTS AS SHOWN.
3
PGND
PGND
PGND
GL
GL
ZCD#
28
15
34
35
27
2
31
1
GL
R12
25K
PGND
PGND
PGND
GL
GL
ZCD#
GL
EN/FAULT#
PWM
C26 C27
1uF 0.1uF
28
R1
25K
EN/FAULT#
PWM
C3
0.1uF
15
PWM1
1K
R4
C2
1uF
34
R6
1K
R3
VDR
1
VSENSE0+
VDR
PWM0
TP2
7
6
38
C11
4.7uF
VDD33
VDD33
3
NOTE: UNLESS OTHERWISE SPECIFIED
PHAS_CFG
FREQ_CFG
VOUT1_CFG
VOUT0_CFG
ASEL1
ASEL0
E3
30
VIN
VOUT0_CFG
18
22
21
4
PHAS_CFG
E1
GND
41
INTVCC
VOUT1_CFG
19
VDD25
FREQ_CFG
20
25
VDD33
37
VCC0
31
VCC1
PGND
34
3
VCC
PGND
14
3
VCC
PGND
14
32
12
TMON
PGND
13
30
1uF
C1
4
U1
AGND
AGND
32
29
1uF
C25
U3
AGND
VDR
VIN
FDMF5820DC
PGND
PVCC
VDR
VIN
FDMF5820DC
PGND
9
SW
SW
SW
SW
SW
PHASE
BOOT
VIN
VIN
VIN
SW
SW
SW
SW
SW
PHASE
BOOT
VIN
VIN
VIN
20
19
18
17
16
7
5
33
11
10
20
19
18
17
16
7
5
33
11
10
R5
0
C18
R7
2k
C34
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
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
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.
VIN
R25
2k
C21
C39
1uF
SCALE = NONE
HZ
YI S.
PCB DES.
APP ENG.
C35
C36
TECHNOLOGY
VOUT0+
GND
VOUT0
VOUT1
VOUT0-
VOUT1
GND
GND
DATE
11-18-15
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
E9
VSENSE1
E8
J6
1.0V/30A
J5
E7
VSENSE0-
VSENSE0+
E6
J4
1.0V/30A
J3
YI S. / H. Wu
APPROVED
DATE:
N/A
SIZE
DC2394A
1
LTC3887-1EUJ
Wednesday, November 18, 2015
IC NO.
SHEET 1
1
OF 2
REV.
HIGH DENSITY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
TITLE: SCHEMATIC
C40
470uF
C41
470uF
R26 0
C38
470uF
+
+
C37
470uF
+
R13 0
+
1210
100uF
100uF
1210
C43
1210
100uF
C20
OPT
C19
OPT
VOUT1
+
+
R10 0
C17
470uF
C16
470uF
100uF
1210
PRODUCTION
+
VOUT0
1
REVISION HISTORY
DESCRIPTION
+
1
REV
C15
100uF
1210
C22
100uF
1210
100uF
1210
C42
C60
100uF
1210
C61
__
ECO
C14
100uF
1210
100uF
1210
C58
100uF
1210
C59
C13
1uF
100uF
1210
C33
22uF
1210
2k
R8
C6
22uF
1210
APPROVALS
100nF
0.17uH
C44
R24
2k
C31
22uF
1210
L2
100nF
VIN
100nF
0.17uH
L1
C4
22uF
1210
2
100nF
R18 0
C12
CUSTOMER NOTICE
25
TMON
PGND
13
AGND
SW
26
4
SW
SW
PGND
12
23
6
25
29
PVCC
SW
24
SW
24
AGND
PGND
6
NC
23
AGND
SW
26
8
VIN
SW
22
VIN
SW
21
9
SW
NC
SW
VIN
SW
8
VIN
SW
22
10
21
5
A
B
C
D
DEMO MANUAL DC2394A
Schematic Diagram
dc2394af
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
GND
4
3
2
1
SDA
SCL
WP
VCC
E19
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
J7
100nF
C47
VIN
VIN
5
6
7
OFF
ON
JP4
DrMOS
VDR
EESDA
EESCL
EEWP
8 AUXVCC
1
2
3
4
5
6
7
8
9
10
11
12
3V3
5
OFF
ON
JP5
2
PULSE
GENERATOR
2
R81
100K
R70
100K
C57
1uF
C54
1uF
8
7
6
5
8
7
6
5
R60
4.99K
GND
GND
VIN
GND
NC
GND
LT1129CS8-5
OUTPUT
SENSE/ADJ
U8
NC
OUTPUT
SENSE/ADJ
LT1129CS8-5
SHDN
VIN
GND
GND
SHDN
U7
R61
4.99K
ALERTB
1
2
3
4
1
2
3
4
E10
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
J8
SCL
+5V
C56
4.7uF
VDR
C52
4.7uF
OPT
R65
OPT
R64
4
E21
E20
DEMO HEADER (M)
SDA
E11
GND
VDR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
SCL
R76
20K
E12
154K
R73
VIN
3V3
3
2
1
VIN
R54
OPT
R62
OPT
1206
DIV
V+
OUT
LTC6992-1
3V3
SYNC
3
10K
R82
TP0101K
Q7
4
5
6
R55
0
E14
R83
15.8K
2
VDD33
70Hz, 3% Duty Cycle
SET
GND
MOD
U5
SHARE_CLK
E13
SHARE_CLK
R78
681K
R72
1M
R56
OPT
SYNC
3
3
LOAD
STEP
C51
1uF
0603
J9
R79
5K
R77
10
1%
R69
20K
3
2
5
-IN
VOUT
U6
2
LT1803IS5
+IN
V-
V+
RUN0
GPIO0B
OFF
5
ON
4
1
3
1
OFF
5
ON
SW2
RUN0
C50
150pF
C
NC
RUN0-RUN1
1
C
NC
GPIO0-GPIO1
JP2
3
JP1
C45
10nF
R58
10
D4
OPT
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
+5V
R50
OPT
SW1
RUN1
D3
OPT
R48
OPT
2
2
C46
10nF
R59
10
3
INT EXT
SCALE = NONE
HZ
YI S.
PCB DES.
APP ENG.
4
R67
2
E15
1
3V3
R80
0.01
2512
Q3
2N7002A
D1
GPIO1B
GRN
R46
200
C55
2.2uF
0805
VOUT1
C53
1uF
0805
C48
2.2uF
0805
1
1
VOUT0
1
R63
127
J10
E18
E17
ALERTB
RED
D5
TP0101K
Q5
1
GPIO0B
Q4
2N7002A
D2
GPIO0B
GRN
R47
200
EXT PULSE
VOUT1
IOUT
TST
VOUT0
GND
J11
J12
3V3
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
1
E16
3V3
GPIO0B
1
DATE:
N/A
SIZE
DC2394A
1
LTC3887-1EUJ
Wednesday, November 18, 2015
IC NO.
SHEET 2
1
OF 2
REV.
HIGH DENSITY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
TECHNOLOGY
VOUT1
VOUT0
ALERTB
RJK0305DPB
Q6
OPT
2512
2512
R68
R66
0.001
GPIO1B
TITLE: SCHEMATIC
R74
10K
RUN1
GPIO1B
RUN0
GPIO0B
GPIO1B
INT / EXT PULSE
JP3
APPROVALS
1
RUN1
GPIO1B
2
R53
5K
R51
5K
VDD33
VDD33
82.5
R75
3.3
R71
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.
C49
1uF
0603
DEMO HEADER (F)
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
OPT
R57
+5V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
0
R52
0
R49
OPT
R45
4
1
6
3
4
2
2
4
1
6
3
SDA
2
2
1
3
2
D
3
1
3
1
5
1
2
3
2
3
2
1
2
1
3
2
ALERTB
1
2
3
4
5
2
3
4
5
2
3
4
5
5
A
B
C
D
DEMO MANUAL DC2394A
Schematic Diagram
dc2394af
11
DEMO MANUAL DC2394A
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
12 Linear Technology Corporation
dc2394af
LT 0116 • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2016
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