DC2263A - Demo Manual

DEMO MANUAL
DC2263A-A/DC2263A-B
LTC3887EUJ Dual Phase
Step-Down DC/DC Controller
with Digital Power System Management
DESCRIPTION
Demonstration circuit 2263A is a high current, high
efficiency, synchronous buck converter featuring the
LTC®3887EUJ, a dual-phase current mode controller.
The LTC3887 has the PMBus interface and power system
management functions.
The DC2263A uses discrete MOSFETs in the power stage.
The input range of this board is from 7V to 14V. The output
voltage can be programmed from 0.8V to 1.8V with an
output current up to 25A per phase. The DC2263A has
two versions: The DC2263A-A uses a sense resistor and
provides two outputs while the DC2263A-B uses DCR
current sensing and provides a dual-phase single output.
The factory default setting for the output voltage is 1.0V.
The DC2263A also has an onboard dynamic load circuit,
which makes it easy for the customer to evaluate the
transient performances.
The DC2263A powers up to default settings and produces
power based on configuration resistors or NVM without the
PERFORMANCE SUMMARY
need for any serial bus communication. This allows easy
evaluation of the DC/DC converter aspects of the LTC3887.
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
For more details and instructions along with downloading
LTpowerPlay, go to the following link.
http://www.linear.com/ltpowerplay
Design files for this circuit board are available at
http://www.linear.com/demo/DC2263A
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
DC2263A-A Assembly (Dual Output)
SYMBOL
PARAMETER
VIN
Input Supply Range
FSW
Factory Default Switching
VOUT0
CH0 Output Voltage Range
IOUT0
CH0 Output Current Range
CONDITIONS
MIN
TYP
MAX
7
12
14
425
IOUT0 = 0A TO 25A, VIN = 7.0V to 14V
0.8
1.0
0
EFF
CH0 Peak Efficiency
VOUT0 = 1.0V, See Figures 4
VOUT1
CH1 Output Voltage Range
IOUT1 = 0A TO 25A, VIN = 7.0V to 14V
IOUT1
CH1 Output Current Range
EFF
CH1 Peak Efficiency
1.0
0
VOUT1 = 1.0V, See Figures 4
V
kHz
1.8
V
25
A
86.5
0.8
UNITS
%
1.8
25
86.5
V
A
%
DC2263A-B Assembly (Single Output)
SYMBOL
PARAMETER
VIN
Input Supply Range
VOUT0
Output Voltage Range
IOUT0
Output Current Range
FSW
Factory Default Switching
EFF
Peak Efficiency
CONDITIONS
MIN
TYP
7
12
14
V
IOUT = 0A TO 50A, VIN = 7.0V to 14V
0.8
1.0
1.8
V
0
VOUT = 1.0V, See Figures 5
MAX
50
UNITS
A
425
kHz
87.8
%
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1
DEMO MANUAL
DC2263A-A/DC2263A-B
QUICK START PROCEDURE
Demonstration circuit 2263A makes it easy to set up to
evaluate the performances of the LTC3887. 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 C34 for CH0
and C32 for CH1. See Figure 3 for proper scope probe
technique.
1. Make sure jumpers are in the following positions:
JUMPER
POSITION
FUNCTION
JP1
C
GPIO0B to GPIO1B
JP2
NC for -A, C for -B
RUN0 to RUN1
JP3
OFF
EXTVCC_DRV
5. Turn on both SW1 (for RUN0), and SW2 (for RUN1)
switches as desired.
6. Check for the correct output voltage from TP4 to TP16
for CH0, TP3 to TP20 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.
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 16V.
Connecting a PC to DC2263A
You can use a PC to reconfigure the power management
features of the LTC3887 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.
Figure 1. Demo Setup with PC
2
dc2263afa
DEMO MANUAL
DC2263A-A/DC2263A-B
QUICK START PROCEDURE
Figure 2. Power Test Setup
Measuring Efficiency
n
To accurately measure efficiency of any configuration, do
the following:
n
n
DC2263A-B version. Measure VIN across the input ceramic capacitor C19. Measure VOUT across the output
ceramic capacitor C25.
Set JP3 to OFF position to disable the auxiliary circuits.
Measuring Output Ripple Voltage
DC2263A-A version. Measure VIN across the input ceramic capacitor (C19 for CH0, C18 for CH1). Measure
VOUT across the output ceramic capacitor (C25 for CH0,
C24 for CH1).
An accurate ripple measurement may be performed by
using the configuration across C34 as shown in Figure 3.
+
VOUT
–
COUT
GND
Figure 3. Measuring Output Voltage Ripple
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3
DEMO MANUAL
DC2263A-A/DC2263A-B
QUICK START PROCEDURE
EFFICIENCY (%)
90
85
80
75
12VIN, 0.9VOUT, 425kHz
12VIN, 1.0VOUT, 425kHz
12VIN, 1.2VOUT, 425kHz
0
5
10
20
15
LOAD CURRENT (A)
25
30
dc2263a F04
Figure 4. Typical Efficiency Curves DC2263A-A, fSW = 425kHz
EFFICIENCY (%)
90
85
80
75
12VIN, 0.9VOUT, 425kHz
12VIN, 1.0VOUT, 425kHz
12VIN, 1.2VOUT, 425kHz
0
10
20
30
LOAD CURRENT (A)
40
50
dc2263a F05
Figure 5. Typical Efficiency Curves DC2263A-B, fSW = 425kHz
4
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DEMO MANUAL
DC2263A-A/DC2263A-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 and LTC3887. 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’s
DC2263A 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.
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5
DEMO MANUAL
DC2263A-A/DC2263A-B
LTpowerPlay QUICK START PROCEDURE
Figure 6. LTpowerPlay Main Interface
The following procedure describes how to use LTpowerPlay
to monitor and change the settings of LTC3887.
1. Download and install the LTpowerPlay GUI:
b. A green message box shows for a few seconds in the
lower left hand corner, confirming that the LTC3887 is
communicating:
http://www.linear.com/ltpowerplay
2. Launch the LTpowerPlay GUI.
a. The GUI should automatically identify the DC2263A.
The system tree on the left hand side should look like this:
c. In the Toolbar, click the “R” (RAM to PC) icon to read
the RAM from the LTC3887. This reads the configuration
from the RAM of LTC3887 and loads it into the GUI.
6
dc2263afa
DEMO MANUAL
DC2263A-A/DC2263A-B
LTpowerPlay QUICK START PROCEDURE
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. 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:
e. You can save the changes into the NVM. In the tool
bar, click “RAM to NVM” button, as following
f. Save the demo board configuration to a (*.proj) file.
Click the Save icon and save the file with a new filename.
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7
DEMO MANUAL
DC2263A-A/DC2263A-B
PARTS LIST
ITEM
QTY REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
Required Circuit Components: DC2063A-A
1
2
C1, C2
CAP., X5R, 100nF, 25V, 10%, 0603
AVX, 06033C104KAT2A
2
2
C21, C22
CAP., X7R 1nF 50V 0603
AVX 06035C102KAT2A
3
1
C5
CAP., 4.7µF, X5R, 25V, 10%, 0805
AVX, 08053D475KAT2A
4
1
C9
CAP., X5R, 1µF, 25V, 10%, 0603
AVX, 06033D105KAT2A
5
4
C10, C11, C29, C30
CAP., POSCAP 330µF 6V D3L
PANASONIC, 6TPF330M9L
6
2
C12, C14
CAP., X5R, 10nF, 16V, 10%, 0603
AVX, 0603YC103KAT2A
7
1
C13
CAP., OS-CON, 150µF, 35V
SUN ELECTRONIC INDUSTRIES CORP.,
35HVP150M
8
2
C15, C16
CAP., X7R 47pF 5% 50V 0603
AVX, 06035C470JAT2A
9
2
C7, C8
CAP., C0G, 3300pF, 50V, 5%, 0603
KEMET, C0603C332J5GACTU
10
1
C17
CAP., 0.22µF, X7R, 16V, 10%, 0603
AVX, 0603YC224KAT2A
11
4
C18, C19, C27, C28
CAP., 22µF, X5R, 25V, 20%, 1210
AVX, 12103D226MAT2A
12
6
C20, C23, C24, C25, C32, C34
CAP., X5R, 100µF, 6.3V, 20%, 1210
AVX 12106D107MAT2A
13
1
C48
CAP., X5R, 4.7µF, 16V, 10%, 0603
TDK C1608X5R1C475K
14
2
D1, D2
DIODE, SCHOTTKY, SOD-323
CENTRAL SEMI., CMDSH-3TR
15
2
L1, L2
IND, 0.22µH
WURTH ELEKTRONIK, 744305022
16
2
Q1, Q3
XSTR, POWER MOSFET LFPAK
INFINEON, BSC050NE2LS
17
4
Q2, Q4
XSTR, POWER MOSFET LFPAK
18
9
R8, R9, , R25, R45, R6, R29, R30, RES., CHIP, 0Ω, 1% 0603
R34, R71, R76
NIC, NRC06ZOTRF
19
11
R27, R28, R39, R40, R41, R42,
R43, R44, R57
NIC, NRC06F1002TRF
RES., CHIP, 10k, 1% 0603
INFINEON, BSC010NE2LSI
20
3
R52, R56, R59
RES., CHIP, 2Ω, 1%, 0603
NIC, NRC06F2R00TRF
21
2
R3, R4
RES., CHIP, 6.49k, 1% 0603
NIC, NRC06F6491TRF
22
2
R10, R16
RES SENSE., CHIP, 0.001Ω, 1% 2512
VISHAY, WSL25121L000FEA
23
4
R11, R12, R13, R14
RES., CHIP, 100Ω, 1% 0603
NIC NRC06F1000TRF
24
1
U1
IC, LTC3887EUJ, QFN 6mm × 6mm
LINEAR TECH.LTC3887EUJ#10C9-1PBF-ES
Additional Demo Board Circuit Components
1
1
C31
CAP., X5R, 100nF, 25V, 10%, 0603
AVX, 06033C104KAT2A
2
0
C3, C6, C35, C36
CAP., OPT 1210
OPT
3
2
C26, C33
CAP., X5R, 10nF, 16V, 10%, 0603
AVX, 0603YC103KAT2A
4
0
C4, C38
CAP., OPT 0603
OPT
5
1
C40
CAP., X7R, 1µF, 50V, 10%, 1206
AVX 12065C105KAT2A
6
2
C41, C47
CAP., X5R, 2.2µF, 50V, 10%, 0805
MURATA GRM21BR61H225KA73L
7
0
C42, C43, C44, C45
CAP., POSCAP OPT D3L
OPT
8
1
C49
CAP., X5R, 4.7µF, 16V, 10%, 0603
TDK C1608X5R1C475K
9
1
C54
CAP., X7R, 1µF, 16V, 10%, 0805
MURATA GRM21BR71C105KA01L
10
2
D3, D4
LED 3×2mm 560nm GRN WTR CLR SMD
ROHM, SML-010FTT86
11
1
D5
LED 3×2mm 650nm RED WTR CLR SMD
ROHM, SML-010VTT86
12
0
D6, D7
LED OPT SOD-323
OPT
13
2
Q5, Q6
TRANS GP SS PNP 40V SOT23
ON SEMI, MMBT3906LT1G
14
0
Q7, Q8
OPT
OPT
8
dc2263afa
DEMO MANUAL
DC2263A-A/DC2263A-B
PARTS LIST
ITEM
QTY REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
15
2
Q12, Q13
MOSFET N-CH 60V 115MA SOT23
FAIRCHILD, 2N7002
16
2
Q14, Q19
MOSFET P-CH 20V 0.58A SOT23
VISHAY, SI2365EDS-T1-GE3
17
1
Q15
MOSFET SPEED SRS 30V 30A LFPAK
RENESAS, RJK0305DPB-00#J0
18
0
R5, R33, R62, R77, R81, R82,
R84, R86, R96, R1, R2, R7, R15,
R26, R69, R17, R18, R19, R20,
R21, R22, R23, R24, R32, R67,
R73, R74
RES., OPT 0603
OPT
19
3
R51, R79, R80
RES., CHIP, 0Ω, 1% 0603
NIC, NRC06ZOTRF
20
2
R58, R92
RES., CHIP, 10k, 1% 0603
NIC, NRC06F1002TRF
21
2
R36, R37
RES., CHIP, 4.99k, 1%, 0603
NIC, NRC06F4991TRF
22
2
R53, R54
RES., CHIP, 200Ω, 1% 0603
NIC, NRC06F2000TRF
23
1
R55
RES., CHIP, 127Ω, 1%, 0603
NIC, NRC06F1270TRF
24
0
R60
RES., OPT 0805
OPT
25
1
R61
RES., CHIP, 100k, 1% 0603
NIC NRC06F1003TRF
26
2
R63, R64
RES., CHIP, 10Ω, 1% 0603
NIC NRC06F10R0TRF
27
1
R68
RES SENSE., CHIP, 0.01Ω, 1% 2512
VISHAY, WSL2512R0100FEA
28
1
R93
RES., CHIP, 15.8k, 1% 0603
NIC, NRC06F1582TRF
29
0
R100
RES SENSE., OPT 2512
OPT
30
1
R101
RES SENSE., CHIP, 0Ω, 1%, 1W 2512
VISHAY WSL251200000ZEA9
31
4
R38, R46, R49, R50
RES SENSE., OPT 2512
OPT
32
1
U2
IC, 24LC05-I/ST TSSOP-8_4.4mm
MICROCHIP, 24LC025-I/ST
33
1
U3
IC, LT1129CS8-5, SO8NB
LINEAR TECH, LT1129CS8-5
HEADER, 1×3 2mm
SULLIN, NRPN031PAEN-RC
Hardware: For Demo Board Only
1
2
JP1, JP2
2
2
XJP1, XJP2
SHUNT, 2mm
SAMTEC 2SN-BK-G
3
1
JP3
HEADER, 1×3 0.1"
WURTH ELEKTRONIK, 61300311121
4
1
XJP3
SHUNT, 0.1" BLK
WURTH ELEKTRONIK, 60900213421
5
6
J1, J2, J3, J4, J5, J6
CONN., JACK, BANANA, NON-INSULATED, 0.218"
KEYSTONE, 575-4
6
1
J7
CONN., HEADER, 2×7, 2mm, R/A (F)
SULLINS, NPPN072FJFN-RC
7
1
J8
CONN., HEADER, 2×7, 2mm, R/A (M)
MOLEX, 87760-1416
8
3
J9, J11, J12
CONN., BNC PC MOUNT RECEPT. JACK, 50Ω, TF-4 POST AMPHENOL CONNEX, 112404
9
1
J10
HEADER, 2×6 2mm STR DL PCB
10
4
STAND-OFF
11
2
FCI 98414-G06-12ULF
STAND-OFF, NYLON 0.50" TALL
KEYSTONE, 8833(SNAP ON)
STENCILS TOP AND BOTTOM
STENCIL DC2263A
dc2263afa
9
DEMO MANUAL
DC2263A-A/DC2263A-B
PARTS LIST
ITEM
QTY REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
Required Circuit Components: DC2063A-B
1
2
C1, C2
CAP., X5R, 100nF, 25V, 10%, 0603
AVX, 06033C104KAT2A
2
1
C5
CAP., X5R, 4.7µF, 25V 0805
AVX, 08053D475KAT2A‎
3
1
C9
CAP., X5R, 1µF, 25V, 10%, 0603
AVX, 06033D105KAT2A
4
2
C4, C38
CAP., X5R 1µF 25V 10% 0603
MURATA GRM188R61E105KA12D
5
1
C8
CAP., C0G, 3300pF, 50V, 5%, 0603
KEMET, C0603C332J5GACTU
6
4
C10, C11, C29, C30
CAP., POSCAP 330µF 6V D3L
PANASONIC, 6TPF330M9L
7
2
C12, C14
CAP., X5R, 10nF, 16V, 10%, 0603
AVX, 0603YC103KAT2A
8
1
C13
CAP., OS-CON, 150µF, 35V
SUNCON, 35HVP150M
9
2
C15, C16
CAP., 47PF, X7R, 50V, 5%, 0603
AVX, 06035C470JAT2A
10
1
C17, C21, C22
CAP., 0.22µF, X7R, 16V, 10%, 0603
AVX, 0603YC224KAT2A
11
4
C18, C19, C27, C28
CAP., 22µF, X5R, 25V, 20%, 1210
AVX, 12103D226MAT2A
12
6
C20, C23, C24, C25, C32, C34
CAP., X5R, 100µF, 6.3V, 20%, 1210
AVX 12106D107MAT2A
13
1
C48
CAP., X5R, 4.7µF, 16V, 10%, 0603
TDK C1608X5R1C475K
15
2
D1, D2
DIODE, SCHOTTKY, SOD-323
CENTRAL SEMI., CMDSH-3TR
16
2
L1, L2
IND, 0.19µH
WURTH ELECTRONIC, 744355019
17
2
Q1, Q3
XSTR, POWER MOSFET LFPAK
INFINEON, BSC050NE2LS
18
4
Q2, Q4
XSTR, POWER MOSFET LFPAK
INFINEON, BSC010NE2LSI
19
9
R8, R9, R25, R45, R7, R15, R26,
R69, R71, R76
RES., 0Ω, 0603
NIC, NRC06ZOTRF
20
4
R1, R2, R12, R14
RES., 845Ω, 1% , 0603
NIC NRC06F8450TRF
21
1
R3
RES., 3.32k, 1%, 0603
NIC, NRC06F3321TRF
22
11
R27, R28, R39, R40, R41, R42,
R43, R44, R57
RES., CHIP, 10k, 1% 0603 RES., 10k, 1%, 0603
NIC, NRC06F1002TRF
23
3
R52, R56, R59
RES., CHIP, 2, 1%, 0603
YAGEO, RC0603FR-072RL
24
6
R10, R16, R38, R46, R49, R50
RES SENSE., CHIP, 0, 1%, 1W 2512
VISHAY WSL251200000ZEA9
26
1
U1
IC, LTC3887EUJ, QFN 6mm × 6mm
LINEAR TECH.LTC3887EUJ#10CA-1PBF-ES
CAP., X5R, 100nF, 25V, 10%, 0603
AVX, 06033C104KAT2A
Additional Demo Board Circuit Components
1
1
C31
2
0
C3, C6, C35, C36
CAP., OPT 1210
OPT
3
2
C26, C33
CAP., X5R, 10nF, 16V, 10%, 0603
AVX, 0603YC103KAT2A
4
0
C7
CAP., OPT 0603
OPT
5
1
C40
CAP., X7R, 1µF, 50V, 10%, 1206
AVX 12065C105KAT2A
6
2
C41, C47
CAP., X5R, 2.2µF, 50V, 10%, 0805
MURATA GRM21BR61H225KA73L
7
0
C42, C43, C44, C45
CAP., POSCAP OPT D3L
OPT
8
1
C49
CAP., X5R, 4.7µF, 16V, 10%, 0603
TDK C1608X5R1C475K
9
1
C54
CAP., X7R, 1µF, 16V, 10%, 0805
MURATA GRM21BR71C105KA01L
10
2
D3, D4
LED 3×2mm 560nm GRN WTR CLR SMD
ROHM, SML-010FTT86
11
1
D5
LED 3×2mm 650nm RED WTR CLR SMD
ROHM, SML-010VTT86
12
0
D6, D7
LED OPT SOD-323
OPT
13
2
Q5, Q6
TRANS GP SS PNP 40V SOT23
ON SEMI, MMBT3906LT1G
14
0
Q7, Q8
OPT
OPT
10
dc2263afa
DEMO MANUAL
DC2263A-A/DC2263A-B
PARTS LIST
ITEM
QTY REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
15
2
Q12, Q13
MOSFET N-CH 60V 115MA SOT23
FAIRCHILD, 2N7002
16
2
Q14, Q19
MOSFET P-CH 20V 0.58A SOT23
VISHAY, SI2365EDS-T1-GE3
17
1
Q15
MOSFET SPEED SRS 30V 30A LFPAK
RENESAS, RJK0305DPB-00#J0
18
0
RES., OPT 0603
R5, R33, R62, R77, R81, R82,
R84, R86, R96, R4, R6, R11, R13,
R29, R30, R34, R17, R18, R19,
R20, R21, R22, R23, R24, R32,
R67, R73, R74
OPT
19
3
R51, R79, R80
NIC, NRC06ZOTRF
RES., 0Ω, 0603
20
2
R58, R92
RES., 10k, 1%, 0603
NIC, NRC06F1002TRF
21
2
R36, R37
RES., CHIP, 4.99k, 1%, 0603
NIC, NRC06F4991TRF
22
2
R53, R54
RES., CHIP, 200Ω, 1% 0603
NIC, NRC06F2000TRF
23
1
R55
RES., CHIP, 127Ω, 1%, 0603
NIC, NRC06F1270TRF
24
0
R60
RES., OPT 0805
OPT
25
1
R61
RES., CHIP, 100k, 1% 0603
NIC NRC06F1003TRF
26
2
R63, R64
RES., CHIP, 10Ω, 1% 0603
NIC NRC06F10R0TRF
27
1
R68
RES SENSE., CHIP, 0.01Ω, 1% 2512
VISHAY, WSL2512R0100FEA
28
1
R93
RES., CHIP, 15.8k, 1% 0603
NIC, NRC06F1582TRF
29
0
R100
RES SENSE., OPT 2512
OPT
30
1
R101
RES SENSE., CHIP, 0Ω, 1%, 1W 2512
VISHAY WSL251200000ZEA9
31
1
U2
IC, 24LC05-I/ST TSSOP-8_4.4mm
MICROCHIP, 24LC025-I/ST
32
1
U3
IC, LT1129CS8-5, SO8NB
LINEAR TECH, LT1129CS8-5
Hardware: For Demo Board Only
1
2
JP1, JP2
HEADER, 1×3 2mm
SULLIN, NRPN031PAEN-RC
2
2
XJP1, XJP2
SHUNT, 2mm
SAMTEC 2SN-BK-G
3
1
JP3
HEADER, 1×3 0.1"
WURTH ELEKTRONIK, 61300311121
4
1
XJP3
SHUNT, 0.1" BLK
WURTH ELEKTRONIK, 60900213421
5
6
J1, J2, J3, J4, J5, J6
CONN., JACK, BANANA, NON-INSULATED, 0.218"
KEYSTONE, 575-4
6
1
J7
CONN., HEADER, 2×7, 2mm, R/A (F)
SULLINS, NPPN072FJFN-RC
7
1
J8
CONN., HEADER, 2×7, 2mm, R/A (M)
MOLEX, 87760-1416
8
3
J9, J11, J12
CONN., BNC PC MOUNT RECEPT. JACK, 50Ω, TF-4 POST AMPHENOL CONNEX, 112404
9
1
J10
HEADER, 2×6 2mm STR DL PCB
FCI 98414-G06-12ULF
10
4
STAND-OFF
STAND-OFF, NYLON 0.50" TALL
KEYSTONE, 8833(SNAP ON)
11
2
STENCILS TOP AND BOTTOM
STENCIL DC2263A
dc2263afa
11
A
B
C
D
J2
J1
C12
10nF
*
R3
TP10
VDD33
R45
0
C14
10nF
*
*
*
*
*
*
R38
R46
R49
R50
R23
OPT
R24
OPT
VOUT0
R18
OPT
R17
OPT
VDD25
R42
10K
*
C7
SYNC
SDA
SCL
R21
OPT
R67
OPT
VOUT1
R22
OPT
R32
OPT
R20
OPT
R73
OPT
RUN0
R19
OPT
21
20
19
18
17
16
24
23
14
15
40
28
5
11
8
10
9
R39
10K
26
R74
OPT
R40
10K
TP25
GPIO0
GPIO1
VSENSE1
*
ISNS1VSENSE1
4
27
845
-B: DUAL PHASE DCR SENSE 3887EUJ#10CA
4
-A: DUAL OUTPUT RSENSE
D2
10K
10K
R44
R43
0
OPT
VDD33
C1
4
OPT
0
3
0
100
8
2
*
R11
VIN
*
OPT
0.22uF 1uF
1nF
*
R1
R3
R4
3.32K OPT
6.49K 6.49K
*
L1
C27
C18
*
R2
L2
*
R7
22uF
C7
OPT
0
OPT
R26,R69
*
0
2
SCALE = NONE
C24
+ C11
330uF
D3L
6.3V
+ C30
330uF
D3L
6.3V
100uF 100uF
1210 1210
C32
VOUT1
C45
+ 330uF
D3L
OPT
6.3V
100uF
1210
C20
VOUT1
1
R9
0
R26
C42
+ 330uF
D3L
OPT
6.3V
C44
+ 330uF
D3L
OPT
6.3V
C43
+ 330uF
D3L
OPT
6.3V
100uF
1210
100uF
1210
+ C29
330uF
D3L
6.3V
100uF
1210
C34
+ C10
330uF
D3L
6.3V
*
R8
0
J3
DATE
VOUT0
01-20-16
GND
GND_SNS
GND
VOUT1
VSENSE0+
VOUT1_SNS
TP3
ADJ., MAX 25A
J6
TP20
GND
J5
TP16
R25
0
J4
VOUT0_SNS
TP4
ADJ., MAX 25A
YS
APPROVED
DATE:
N/A
SIZE
1
DEMO CIRCUIT 2263A
Wednesday, January 20, 2016
IC NO.
REV.
SHEET 1
OF 2
2
DUAL-PHASE/DUAL OUTPUT STEP-DOWN DC/DC CONVERTER
WITH POWER SYSTEM MANAGEMENT
LTC3887EUJ
TECHNOLOGY
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
OPT OPT OPT OPT OPT OPT OPT OPT OPT OPT OPT OPT
OPT OPT OPT OPT OPT OPT OPT OPT OPT OPT OPT OPT
TITLE: SCHEMATIC
OPT
0.19uH
LT
YS
*
R30
*
R34
C23
C25
VOUT0
PRODUCTION
2
VOUT0
DESCRIPTION
REVISION HISTORY
REV
R38,R46,R49,R50 R17 R24 R18 R23 R32 R22 R67 R21 R73 R20 R74 R19
R29
*
*
2512
R16
__
ECO
0.22uH
L1,L2
R6
*
2512
R10
APPROVALS
3300pF
*
R15
*
1210
1210
22uF
22uF
C28
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
845
100
Q7
OPT
5
6
7
Q8
OPT
5
6
7
22uF
C19
2
CURRENT SENSE CONNECTIONS
C4
*
*
*
VIN
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.
0
0.001
*
C21
R14
8
2
1
C38
1
*
R12
R13
EXTVCC_DRV
R12,R14 C21,C22 C4,C38
Q2
BSC010NE2LSI
100nF
4
Q1
BSC050N02LS
VSENSE0+
*
C22
4
Q3
BSC050N02LS
OPT
R60
BSC010NE2LSI
Q4
4
100nF
C2
D1
3
R6,R29 R10,R16
R11,R13
R30,R34
2
R56
VSENSE0-
R1,R2 R7,R15
OPT
U1
12
0
R76
2
R59
0
R71
GPIO0B GPIO1B
ISNS1+
3
13
BG1
VSENSE0-
2
32
VSENSE0+
1
SW1
ISNS0-
7
29
ISNS0+
6
TG1
BG0
36
BOOST1
SW0
39
30
BOOST0
31
TG0
38
TP24
37
C48
4.7uF
INTVCC
3887EUJ#10C9
CONFIGURATION
SGND AND PGND CONNECTED AT
A SINGLE NODE NEAR U1
PHAS_CFG
FREQ_CFG
VOUT1_CFG
ISNS1-
ISNS1+
BG1
SW1
BOOST1
TG1
VSENSE0-
VSENSE0+
ISNS0-
ISNS0+
BG0
LTC3887EUJ
BOOST0
TG0
C9
1uF
VDD33
C5
4.7uF
0805
SW0
VOUT0_CFG
ASEL1
ASEL0
VDD25
TP7
U1
SHARE_CLK
WP
RUN0
RUN1
TSNS0
TSNS1
ITH0
ITH1
ALERT
SYNC
SDA
SCL
VDD33
C17
0.22uF
ITH0
1. ALL RESISTORS AND CAPACITORS ARE 0603.
5
R57
10K
RUN1
R41
10K
TP23
ITH1
ALERTB
2
SHARE_CLK
C35
C36
OPT
1210
R4
MMBT3906LT1G
Q6
C15
47pF
R69
C3
C6
OPT
1210
TSNS0
R5
OPT
C8
3300F
C13
150uF
35V
R52
NOTE: UNLESS OTHERWISE SPECIFIED
SGND
+
MMBT3906LT1G
Q5
TSNS1
C16
47pF
GND
TP2
GND
7V - 14V
VIN
VIN
VDD25
TP1
VIN
2
1
INTVCC/EXTVCC
2
1
VDD25 GND
5
1
2
3
4
5
VDD33
4
5
9
TP9
41
GND
35
VIN
33
INTVCC
25
VDD33
22
VDD25
PGND
34
3
10
1
2
3
5
1
2
3
5
1
2
3
3
10
4
12
9
GND
A
B
C
D
DEMO MANUAL
DC2263A-A/DC2263A-B
SCHEMATIC DIAGRAM
dc2263afa
A
B
C
D
GND
SDA
SCL
WP
VCC
100nF
C31
5
6
7
EESDA
EESCL
EEWP
8 AUXVCC
1
2
3
4
5
6
7
8
9
10
11
12
3V3
C41
2.2uF
0805
GND
5
1
TP15
J11
VOUT0
VOUT1
10K
R58
4
Q15
RJK0305DPB
DO NOT EXCEED 5% DUTY CYCLE!
PULSE IN
TP18
DYNAMIC LOAD CIRCUIT
24LC025-I/ST
VSS
A2
A1
A0
VOUT0
TP17
4
3
2
1
U2
TO DC1613A
AUXP
SDA
GND
SCL
LGKPWR
ALERTB
GPIO_1
OUTEN_0
OUTEN_1
GND
AUXSCL
AUXSDA
J10
5
R36
4.99K
C47
2.2uF
0805
R68
0.01
2512
1
2
3
R37
4.99K
ALERTB
1
VOUT1
VOUT1
NOTE:
PULSE OUT
10mV / AMP
4
IOUT
TST
OPT
R33
J9
OPT
VOUT0
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
SCL
TP5
SDA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TP6
SCL
ON
OFF
SYNC
2
R61
100K
VIN
SHARE_CLK
JP3
EXTVCC_DRV
VIN
J8 DEMO HEADER (M)
SDA
R31
TP22
ALERTB
C54
1uF
0805
J12
R100 OPT
R101 0
1
3
2
C40
1uF
8
7
6
5
VIN
NC
GND
3
4
1
2
3
GPIO0B
DEMO HEADER (F)
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
OPT
EXTVCC_DRV
C49
4.7uF
J7
1
2
3
4
5
6
7
8
9
10
11
12
13
14
R81
R80 0
R79 0
R77 OPT
CUSTOMER NOTICE
R62
OPT
TP21
SYNC
1
1
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
3V3
Q12
2N7002A
2
SCALE = NONE
YI S.
LT
R84
OPT
GPIO1B
OFF
5
ON
SW1
RUN0
1
2
3V3
TP8
RUN1
VIN
3V3
1
3
1
10K
R92
3V3
2
D5
ALERTB
RED
TP0101K
Q14
VDD33
R55
127
R93
15.8k
Q19
TP0101K
DATE:
N/A
SIZE
1
DEMO CIRCUIT 2263A
Wednesday, January 20, 2016
IC NO.
SHEET 2
2
OF 2
REV.
DUAL-PHASE/DUAL OUTPUT STEP-DOWN DC/DC CONVERTER
WITH POWER SYSTEM MANAGEMENT
LTC3880EUJ
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
ALERTB
SGND
2N7002A
Q13
D4
GPIO1
GREEN
R54
200
C26
10nF
R63
10
R27
10K
VDD33
RUN1
TP13
RUN0
RUN0
TP14
GPIO0B
GPIO0B
TP12
GPIO1B
GPIO1B
TP11
TECHNOLOGY
1
TITLE: SCHEMATIC
C33
10nF
R64
10
R28
10K
D3
GPIO0
GREEN
2
C
NC
RUN0-RUN1
3
JP2
D6
OPT
VDD33
2
R53
200
R82
OPT
APPROVALS
OFF
5
ON
SW2
RUN1
D7
OPT
C
NC
GPIO0-GPIO1
3
JP1
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.
OUTPUT
LT1129CS8-5
GND
GND
R86
OPT
1206
R51
0
SENSE/ADJ
R96
OPT
SHDN
U3
VIN
3V3
TP19
SHARE_CLK
4
1
6
3
4
1
ALL PARTS ON THIS PAGE ARE FOR DEMO BOARD ONLY, NOT NEEDED IN CUSTOMER DESIGN
2
3
4
5
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.
2
3
4
5
2
3
4
5
3
1
4
1
6
3
2
1
3
2
2
1
3
2
2
3
2
1
5
A
B
C
D
DEMO MANUAL
DC2263A-A/DC2263A-B
SCHEMATIC DIAGRAM
dc2263afa
13
DEMO MANUAL
DC2263A-A/DC2263A-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
14 Linear Technology Corporation
dc2263afa
LT 0216 REV A • 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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