DC2312A - Demo Manual

DEMO MANUAL
DC2312A-A/DC2312A-B
LTC3882EUJ-1 High Efficiency
Step-Down DC/DC Converter
with Power System Management
DESCRIPTION
Demonstration circuit 2312A is a high current, high
efficiency, dual phase synchronous buck converter
featuring the LTC3882EUJ-1, a dual output voltage
mode controller with the additional features of differential VOUT sense and dedicated PGOOD output on
both channels, compared to LTC3882. The LTC3882-1
has the PMBus interface and power system management functions.
There are two versions of the boards available:
nn
nn
DC2312A-A: Dual phase dual output configuration. Default output setting VOUT0 = 1.5V/35A, VOUT1 = 1.0V/35A.
DC2312A-B: Dual phase single output configuration.
Default output setting VOUT0 = 1.0V/70A.
The DC2312A powers up to default settings and produces power based on configuration resistors or with
its nonvolatile memory without the need for any serial
bus communication. This allows easy evaluation of the
PERFORMANCE SUMMARY
SYMBOL
PARAMETER
VIN
Input Supply Range
VOUT0
Output Voltage Range (-A Version)
IOUT0
Output Current Range (-A Version)
VOUT1
Output Voltage Range (-A Version)
IOUT1
Output Current Range (-A Version)
VOUT0
Output Voltage Range (-B Version)
IOUT0
Output Current Range (-B Version)
FSW
Factory Default Switching (-A Version)
DC/DC converter. To fully explore the extensive power
system management features of the part, 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 settings within
its onboard EEPROM, along with viewing telemetry parameters that include voltage, current, temperature and
fault status.
GUI Software LTpowerPlay Download
The software can be downloaded from:
http://www.linear.com/LTpowerPlay
Design files for this circuit board are available at
http://www.linear.com/demo/DC2312A
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
LTpowerPlay is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
Specifications are at TA = 25°C
CONDITIONS
MIN
TYP
7
12
14
V
IOUT0 = 0A to 35A, VIN = 7V to 14V
0.5
1.5
2.0*
V
35**
A
0
IOUT1 = 0A to 35A, VIN = 7V to 14V
0.5
1.0
0
IOUT0 = 0A to 70A, VIN = 7V to 14V
0.5
1.0
0
MAX
UNITS
2.0*
V
35**
A
2.0*
V
70**
A
500
kHz
450
kHz
90.6
%
FSW
Factory Default Switching (-B Version)
EFFICIENCY
Full Load Efficiency (-A Version)
VOUT0 = 1.5V, IOUT0 = 35A, See Figure 5
VOUT1 = 1.0V, IOUT1 = 35A, See Figure 5
88.0
%
Full Load Efficiency (-B Version)
VOUT0 = 1.0V, IOUT0 = 70A, See Figure 6
87.8
%
*Note: The DC2312A uses 2.5V-rated low ESR PosCAP (Part No. 2R5TPE470M7) as output capacitors for optimized load transient performance.
If > 2.0V VOUT is needed, 4V or 6.3V-rated output capacitors should be used.
**Note: When continuously running at full load, forced air flow is needed.
dc2312afb
1
DEMO MANUAL
DC2312A-A/DC2312A-B
QUICK START PROCEDURE
Demonstration circuit 2312A makes it easy to set up to
evaluate the performance of the LTC3882-1. Refer to
Figures 2 and 3 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 C13 or C39. See
Figure 4 for proper scope probe technique.
1. Make sure jumpers are in the following positions:
DC2312A-A Version
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 are OFF.
4. Turn on the power at the input.
Note. Make sure that the input voltage does not exceed 15V.
5. Turn on RUN switches as desired.
6. Check for the correct output voltage from VOUT0+ to
VOUT0– and from VOUT1+ to VOUT1– .
Note. If there is no output, temporarily disconnect the
load to make sure that the load is not set too high.
JUMPER
POSITION
JP1
NC
Untie GPIO0B to GPIO1B
FUNCTION
JP2
NC
Untie RUN0 to RUN1
JP4
ON
External 5V VDR for DrMOS
JP6
ON
External 5V VCC for LTC3882-1
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 voltages
from the GUI. See LTpowerPlay Quick Start Procedure
session for details.
DC2312A-B Version
JUMPER
POSITION
JP1
C
FUNCTION
Tie GPIO0B to GPIO1B
JP2
C
Tie RUN0 to RUN1
JP4
ON
External 5V VDR for DrMOS
JP6
ON
External 5V VCC for LTC3882-1
CONNECTING A PC TO DC2312A
You can use a PC to reconfigure the power management
features of the LTC3882-1 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
LTC3882-1
DEMO BOARD
DC2312A
VOUT1
LOAD
LOAD
DC2312A F01
Figure 1. Demo Setup with PC
dc2312afb
2
DEMO MANUAL
DC2312A-A/DC2312A-B
QUICK START PROCEDURE
–
SHUNT
IOUT0
VOUT0
V OUT0
LOAD
+
–
+
A
+
VIN
+
–
+
–
IIN
–
POWER
SUPPLY
DC1613A
CONNECTOR
IOUT1
+
–
V OUT1
LOAD
SHUNT
–
+
V OUT1
DC2312A F02
Figure 2. Power Test Setup for DC2312A-A
dc2312afb
3
DEMO MANUAL
DC2312A-A/DC2312A-B
QUICK START PROCEDURE
–
SHUNT
IOUT0_1
V OUT0
LOAD 1
+
VOUT0
–
+
A
+
VIN
+
–
+
–
IIN
FOR BETTER THERMAL DISTRIBUTION,
USE A PIECE OF LOW IMPEDANCE METAL
TO CONNECT TOP LAYER VOUT COPPER
AND PULL CURRENT EVENLY FROM J3
TO J4 AND FROM J9 TO J8.
–
POWER
SUPPLY
DC1613A
CONNECTOR
IOUT0_2
+
–
V OUT0
LOAD 2
SHUNT
DC2312A F03
Figure 3. Power Test Setup for DC2312A-B
dc2312afb
4
DEMO MANUAL
DC2312A-A/DC2312A-B
QUICK START PROCEDURE
COMBINING DC2312A WITH OTHER DIGITAL POWER
DEMO BOARDS
MEASURING EFFICIENCY (SEE FIGURES 5 AND 6)
The DC2312A may be plugged together in a multi-board
array with other LTC power system management boards
using J12 and J13.
To accurately measure efficiency of any configuration, do
the following:
nn
nn
MEASURING OUTPUT RIPPLE VOLTAGE
An accurate ripple measurement may be performed by
using the configuration in Figure 4 across C13 or C39.
nn
nn
+
VOUT
Set JP4 and JP6 on the “OFF” position.
Connect external 5V supply to VDR and VCC turrets and
measure its input current.
Measure VIN across the input ceramic capacitor (C10,
C6). Measure VOUT across the output ceramic capacitor (C13, C39).
Add the loss from external 5V supply into the efficiency
calculation.
–
COUT
GND
95
95
90
90
85
85
EFFICIENCY (%)
EFFICIENCY (%)
Figure 4. Measuring Output Voltage Ripple
80
75
70
65
5
10
15
20
25
LOAD CURRENT (A)
30
80
75
70
VOUT0 = 1.5V
VOUT1 = 1.0V
0
VOUT0 = 1.0V
35
DC2312A F05
Figure 5. DC2312A-A, Typical Efficiency Curves,
VIN = 12V, FSW = 500kHz, CCM
65
0
10
20
30
40
50
LOAD CURRENT (A)
60
70
DC2312A F06
Figure 6. DC2312A-B, Typical Efficiency Curves,
VIN = 12V, FSW = 450kHz, CCM
dc2312afb
5
DEMO MANUAL
DC2312A-A/DC2312A-B
QUICK START PROCEDURE
Figure 7. Load Transient Waveform DC2312A-A, VIN = 12V, VOUT0 = 1.5V, FSW = 500kHz, 0% to 25% (8.75A) Load Step
Figure 8. Load Transient Waveform DC2312A-A, VIN = 12V, VOUT1 = 1.0V, FSW = 500kHz, 0% to 25% (8.75A) Load Step
Figure 9. Load Transient Waveform DC2312A-B, VIN = 12V, VOUT0 = 1.0V, FSW = 450kHz, 0% to 25% (17.5A) Load Step
dc2312afb
6
DEMO MANUAL
DC2312A-A/DC2312A-B
QUICK START PROCEDURE
Figure 10. Thermal Picture of DC2312A-A, VIN = 12V, VOUT0 = 1.5V/35A, VOUT1 = 1.0V/35A, fSW = 500kHz, 400LFM Air Flow
Figure 11. Thermal Picture of DC2312A-B, VIN = 12V, VOUT0 = 1.0V/70A, fSW = 450kHz, 400LFM Air Flow
dc2312afb
7
DEMO MANUAL
DC2312A-A/DC2312A-B
LTpowerPlay SOFTWARE GUI
LTpowerPlay is a powerful Windows-based development environment that supports Linear Technology
power system management ICs, including the LTC3880,
LTC3882/LTC3882-1, LTC3883, LTM4676A, LTC2974
and the LTC2978. 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 multi-chip
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 LTC3882‑1’s
DC2312A 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 12. LTpowerPlay Main Interface
dc2312afb
8
DEMO MANUAL
DC2312A-A/DC2312A-B
LTpowerPlay QUICK START PROCEDURE
The following procedure describes how to use LTpowerPlay
to monitor and change the settings of LTC3882-1 (taking
DC2312A-A as an example).
d. If you want to change the output voltage to a different
value, like 1.2V. In the Config tab, type in 1.2 in the
VOUT_COMMAND box, like this:
1. Download and install the LTPowerPlay GUI:
http://www.linear.com/LTpowerPlay
2. Launch the LTpowerPlay GUI.
a. The GUI should automatically identify the DC2312A-A.
The system tree on the left hand side should look
like this:
b. A blue message box shows for a few seconds in the
lower left hand corner, confirming that the LTC3882-1
is communicating:
Then, click the “W” (PC to RAM) icon to write these
register values to the LTC3882-1. After finishing this
step, you will see the output voltage will change to 1.2V.
c. In the Toolbar, click the “R” (RAM to PC) icon to
read the RAM from the LTC3882-1. This reads the
configuration from the RAM of LTC3882-1 and loads
it into the GUI:
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 name.
dc2312afb
9
DEMO MANUAL
DC2312A-A/DC2312A-B
PARTS LIST DC2312A-A
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
Required Circuit Components
1
3
C5, C52, C53
CAP., X7R, 0.1µF, 16V, 10%, 0402
AVX, 0402YC104KAT2A
2
3
CF, COUT4, COUT5
CAP., X7R, 0.1uF, 16V, 10%, 0603
AVX, 0603YC104KAT2A
3
2
CFFW1, CFFW2
CAP., NP0, 22pF, 25V, 10%, 0402
AVX, 04023A220KAT2A
4
1
CIN1
CAP., X5R, 10µF, 25V, 20%, 1206
AVX, 12063D106MAT2A
5
2
COUT3, COUT7
CAP., X5R, 10µF, 16V, 10%, 0805
AVX, 0805YD106KAT2A
6
1
CIN3
CAP., TANT, 22µF, 35V, 20%, 7343
AVX, TCME226M035R0025
7
4
C6, C10, C33, C34
CAP., X5R, 22µF, 25V, 10%, 1210
MURATA, GRM32ER61E226KE15L
8
6
C1, C2, C8, C31, C35, C9
CAP., X5R, 1µF, 10V, 20%, 0402
MURATA, GRM155R61A105ME15D
9
1
C7
CAP., X5R, 2.2µF, 10V, 20%, 0402
Taiyo Yuden, LMK105BJ225MV-F
10
3
C47, C57, C58
CAP., X5R, 1µF, 16V, 10%, 0805
AVX, 0805YD105KAT2A
11
2
C3, C4
CAP., OS-CON, 330µF, 16V, 20%, F12
PANASONIC, 16SVP330M
12
2
C11, C36,
CAP., X7R, 100nF, 16V, 10%, 0402
MURATA, GRM155R71C104KA88D
13
1
C45
CAP., X7R, 100nF, 16V, 10%, 0603
TDK, C1608X7R1C404KT000N
14
8
C12, C13, C14, C23, C38, C39, C40, C43
CAP., X5R, 100µF, 6.3V, 20%, 1206
MURATA, GRM31CR60J107ME39L
15
8
C15, C16, C26, C27, C17, C18, C19, C28
CAP., POSCAP, 470µF, 2.5V, D2E SIZE
PANASONIC, EEFGX0E471R
16
2
L1, L2
IND., 0.17µH
COOPER., FP1007R3-R17-R
17
1
R1
RES., CHIP, 1, 1%, 0402
VISHAY, CRCW04021R00FKED
18
2
R2, R15
RES., CHIP, 24.9k, 1%, 0402
VISHAY, CRCW040224K9FKED
19
2
R93, R94
RES., CHIP, 200, 1%, 0603
VISHAY, CRCW0603200RFKED
20
3
R80, R81, R84
RES., CHIP, 127, 1%, 0603
VISHAY, CRCW0603127RFKEA
21
1
R87
RES., CHIP, 15.8k, 1%, 0603
VISHAY, CRCW060315K8FKEA
22
2
U1, U3
IC, HIGH FREQUENCY DrMOS MOUDLE
FAIRCHILD, FDMF5820DC
23
1
U2
IC, LTC3882EUJ-1, QFN 6mm × 6mm
LINEAR TECH., LTC3882EUJ-1#0134-1PBF
24
1
U5
IC EEPROM 2KBIT 400kHz 8 TSSOP
MICROCHIP, 24LC025-I/ST
25
1
U6
IC., LTC3607EMSE, 16 Pin QFM 3mm × 3mm
LINEAR TECH., LTC3607IMSE#PBF
26
1
R20
RES., CHIP, 53.6k, 1%, 0402
VISHAY, CRCW040253K6FKED
27
1
C50
CAP., NP0, 10pF, 25V, 10%, 0402
AVX, 04023A100KAT2A
28
1
C54
CAP., X7R, 220pF, 50V, 10%, 0402
MURATA, GRM155R71H221KA01D
29
2
C21, C55
CAP., X7R,680pF, 50V, 10%, 0402
MURATA, GRM155R71H681KA01D
dc2312afb
10
DEMO MANUAL
DC2312A-A/DC2312A-B
PARTS LIST DC2312A-A
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
Additional Demo Board Circuit Components
1
0
D4, D7 (OPT)
OPTIONAL
2
2
C20, C42
CAP., X5R, 0.22µF, 16V, 10%, 0402
TDK, C1005X5R1C224K
3
1
C22
CAP., X7R, 220pF, 50V, 10%, 0402
MURATA, GRM155R71H221KA01D
4
2
C29, C44
CAP., X7R, 0.01µF, 16V, 10%, 0603
AVX, 0603YC103KAT2A
5
2
C32, C48
CAP., X7R, 0.01µF, 16V, 10%, 0402
AVX, 0402YC103KAT2A
6
1
C30
CAP., NP0, 10pF, 25V, 10%, 0402
AVX, 04023A100KAT2A
7
2
D9, D11
LED, GREEN RECT CLEAR 0603
LITE ON, LTST-C193KGKT-5A
8
3
D5, D6, D10
LED, RED RECT CLEAR 0603
LITE ON, LTST-C193KRKT-5A
9
1
D8
DIODE, ULTRA LOW SCHOTTKY RECTIEIER
NXP SEMI. PMEG2005AEL,315
10
2
L3, L4
IND., 4.7µH
VISHAY, IHLP1616BZER4R7M11
11
2
Q1, Q6
TRANS, PNP GP 40V 200MA SC75-3
ON SEMI, MMBT3906TT1G
12
1
Q3
MOSFET, SPEED SRS 30V 30A LFPAK
RENESAS, RJK0305DPB-00#J0
13
4
Q19, Q20, Q21, Q22
MOSFET, P-CH 20V 5.9A SOT-23
VISHAY, Si2365EDS-T1-GE3
14
2
Q23, Q24
MOSFET, N-CH 60V 115MA SOT23
DIODES INC., 2N7002-7-F
15
1
RF
RES., CHIP, 100, 1%, 0402
VISHAY, CRCW0402100RFKED
16
2
RPG1, RPG2
RES., CHIP, 100k, 1%, 0402
VISHAY, CRCW0402100KFKED
17
2
RSD1, RSD2
RES., CHIP, 5.1M, 5%, 0402
VISHAY, CRCW04025M10JNED
18
2
R5, R25
RES., CHIP, 0, 0402
VISHAY, CRCW04020000Z0ED
19
5
R16, R24, R71, R73, R83
RES., CHIP, 0, 0603
VISHAY, CRCW06030000Z0EA
20
1
R45
SENSE RES., 0.010Ω 1W 1% 2512
PANASONIC, ERJ-M1WSF10MU
SENSE RES., 0.001Ω 1W 1% 2512
PNANSONIC, ERJ-M1WTF1M0U
21
1
R48
22
0
R29, R30, R31, R32, R33, R34, R35, R36, OPTIONAL
R37, R38, R39, R40, R53, R68, R72, R74,
R75, R78, R82, R90, R91, R92 (OPT)
23
2
R7, R27
RES., CHIP, 2.67k, 1%, 0402
VISHAY, CRCW04022K67FKED
RES., CHIP, 1.24k, 1%, 0402
VISHAY, CRCW04021K24FKED
24
1
R9
25
13
R10, R11, R13, R14, R17, R19, R21, R28, RES., CHIP, 10k, 1%, 0603
R41, R42, R43, R44, R86
VISHAY, CRCW060310K0FKEA
22
1
R12
RES., CHIP, 53.6k, 1%, 0402
VISHAY, CRCW040253K6FKED
23
4
R57, R58, R59, R60
RES., CHIP, 1k, 1%, 0402
VISHAY, CRCW04021K00FKED
24
2
R63, R65
RES., CHIP, 121k, 1%, 0402
VISHAY, CRCW0402121KFKED
25
2
R64, R66
RES., CHIP, 887k, 1%, 0402
VISHAY, CRCW0402887KFKED
26
2
R69, R70
RES., CHIP, 10, 1%, 0603
VISHAY, CRCW060310R0FKEA
27
2
R76, R77
RES., CHIP, 4.99k, 1%, 0603
VISHAY, CRCW06034K99FKEA
28
0
R62, R67, R98, R99, R101
OPTIONAL
29
0
R61, R100
OPTIONAL
30
2
R22, R46
RES., CHIP, 0, 0603
31
0
C37, C41
OPTIONAL
32
1
R18
RES., CHIP, 1.24k, 1%, 0402
33
0
R49
OPTIONAL
VISHAY, CRCW06030000Z0EA
VISHAY, CRCW04021K24FKED
dc2312afb
11
DEMO MANUAL
DC2312A-A/DC2312A-B
PARTS LIST DC2312A-A
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
Hardware – For Demo Board Only
1
28
E1-E4, E7-E19, E21-E31
TESTPOINT, TURRET, .094"
MILL-MAX, 2501-2-00-80-00-00-07-0
2
2
J1, J2
BANANA SMALL
KEYSTONE, 575-4
3
4
J3, J4, J8, J9
STUD, TESTPIN
PEM, KFH-032-10
4
8
J3, J4, J8, J9 ( X2 )
NUT, BRASS 10-32
ANY #10-32M/S BR PL
5
4
J3, J4, J8, J9
RING, LUG #10
KEYSTONE, 8205
6
4
J3, J4, J8, J9
WASHER, TIN PLATED BRASS
ANY #10 EXT BZ TN
7
4
JP1, JP2, JP4, JP6
HEADER, 3 PIN 0.079 SINGLE ROW
WURTH, 620 003 111 21
8
4
JP1, JP2, JP4, JP6
SHUNT
SAMTEC, 2SN-BK-G
9
2
SW3, SW4
CONNECTOR, SUB MINIATURE SLIDE
SWITCHES
C&K.,JS202011CQN
10
3
J7, J10, J14
CONN., BNC PC MOUNT RECEPT. JACK,
50Ω, TF-4 POST
CONNEX, 112404
11
1
J11
HEADER 12POS 2MM STR DL PCB
FCI, 98414-G06-12ULF
12
1
J12
CONN., HEADER, 2X7, 2mm, R/A (F)
SULLINS, NPPN072FJFN-RC
13
1
J13
CONN., HEADER, 2X7, 2mm, R/A (M)
MOLEX, 87760-1416
14
1
J15
HEADER, 4 PINS, SHROUDED
HIROSE, DF3A-4P-2DSA
dc2312afb
12
DEMO MANUAL
DC2312A-A/DC2312A-B
PARTS LIST DC2312A-B
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
Required Circuit Components
1
3
C5, C52, C53
CAP., X7R, 0.1µF, 16V, 10%, 0402
AVX, 0402YC104KAT2A
2
3
CF, COUT4, COUT5
CAP., X7R, 0.1µF, 16V, 10%, 0603
AVX, 0603YC104KAT2A
3
2
CFFW1, CFFW2
CAP., NP0, 22pF, 25V, 10%, 0402
AVX, 04023A220KAT2A
4
1
CIN1
CAP., X5R, 10µF, 25V, 20%, 1206
AVX, 12063D106MAT2A
5
2
COUT3,COUT7
CAP., X5R, 10µF, 16V, 10%, 0805
AVX, 0805YD106KAT2A
6
1
CIN3
CAP., TANT, 22µF, 35V, 20%, 7343
AVX, TCME226M035R0025
7
4
C6, C10, C33, C34
CAP., X5R, 22µF, 25V, 10%, 1210
MURATA, GRM32ER61E226KE15L
8
6
C1, C2, C8, C31, C35, C9
CAP., X5R, 1µF, 10V, 20%, 0402
MURATA, GRM155R61A105ME15D
9
1
C7
CAP., X5R, 2.2µF, 10V, 20%, 0402
Taiyo Yuden, LMK105BJ225MV-F
10
3
C47, C57, C58
CAP., X5R, 1µF, 16V, 10%, 0805
AVX, 0805YD105KAT2A
11
2
C3, C4
CAP., OS-CON, 330µF, 16V, 20%, F12
PANASONIC, 16SVP330M
12
2
C11, C36
CAP., X7R, 100nF, 16V, 10%, 0402
MURATA, GRM155R71C104KA88D
13
1
C45
CAP., X7R, 100nF, 16V, 10%, 0603
TDK, C1608X7R1C404KT000N
14
8
C12, C13, C14, C23, C38, C39, C40,
C43
CAP., X5R, 100µF, 6.3V, 20%, 1206
MURATA, GRM31CR60J107ME39L
15
8
C15, C16, C26, C27, C17, C18, C19,
C28
CAP., POSCAP, 470µF, 2.5V, D2E SIZE
PANASONIC, EEFGX0E471R
16
2
L1, L2
IND., 0.17µH
COOPER., FP1007R3-R17-R
17
1
R1
RES., CHIP, 1, 1%, 0402
VISHAY, CRCW04021R00FKED
18
2
R2, R15
RES., CHIP, 24.9k, 1%, 0402
VISHAY, CRCW040224K9FKED
19
2
R93, R94
RES., CHIP, 200, 1%, 0603
VISHAY, CRCW0603200RFKED
20
3
R80, R81, R84
RES., CHIP, 127, 1%, 0603
VISHAY, CRCW0603127RFKEA
21
1
R87
RES., CHIP, 15.8k, 1%, 0603
VISHAY, CRCW060315K8FKEA
22
2
U1, U3
IC, HIGH FREQUENCY DrMOS MOUDLE
FAIRCHILD, FDMF5820DC
23
1
U2
IC, LTC3882EUJ-1, QFN 6mm × 6mm
LINEAR TECH., LTC3882EUJ-1#0315-1PBF
24
1
U5
IC EEPROM 2KBIT 400kHz 8TSSOP
MICROCHIP, 24LC025-I/ST
25
1
U6
IC., LTC3607EMSE, 16 Pin QFM 3 × 3mm
LINEAR TECH., LTC3607IMSE#PBF
26
2
C37, C41
CAP., NP0, 22pF, 25V, 10%, 0402
AVX, 04023A220KAT2A
27
1
R49
RES., CHIP, 0, 2512, 1W
VISHAY, CRCW25120000Z0EG
28
1
C21
CAP., X7R, 470pF, 50V, 10%, 0402
MURATA, GRM155R71H471KA01D
dc2312afb
13
DEMO MANUAL
DC2312A-A/DC2312A-B
PARTS LIST DC2312A-B
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
Additional Demo Board Circuit Components
1
0
D4, D7 (OPT)
OPTIONAL
2
2
C20, C42
CAP., X5R, 0.22µF, 16V, 10%, 0402
TDK, C1005X5R1C224K
3
1
C22
CAP., X7R, 220pF, 50V, 10%, 0402
MURATA, GRM155R71H221KA01D
4
2
C29, C44
CAP., X7R, 0.01µF, 16V, 10%, 0603
AVX, 0603YC103KAT2A
5
2
C32, C48
CAP., X7R, 0.01µF, 16V, 10%, 0402
AVX, 0402YC103KAT2A
6
1
C30
CAP., NP0, 10pF, 25V, 10%, 0402
AVX, 04023A100KAT2A
7
2
D9, D11
LED, GREEN RECT CLEAR 0603
LITE ON, LTST-C193KGKT-5A
8
3
D5, D6, D10
LED, RED RECT CLEAR 0603
LITE ON, LTST-C193KRKT-5A
9
1
D8
DIODE, ULTRA LOW SCHOTTKY RECTIFIER
NXP SEMI. PMEG2005AEL,315
10
2
L3, L4
IND., 4.7µH
VISHAY, IHLP1616BZER4R7M11
11
2
Q1, Q6
TRANS, PNP GP 40V 200MA SC75-3
ON SEMI, MMBT3906TT1G
12
1
Q3
MOSFET, SPEED SRS 30V 30A LFPAK
RENESAS, RJK0305DPB-00#J0
13
4
Q19, Q20, Q21, Q22
MOSFET, P-CH 20V 5.9A SOT-23
VISHAY, Si2365EDS-T1-GE3
14
2
Q23, Q24
MOSFET, N-CH 60V 115MA SOT23
DIODES INC., 2N7002-7-F
15
1
RF
RES., CHIP, 100, 1%, 0402
VISHAY, CRCW0402100RFKED
16
2
RPG1, RPG2
RES., CHIP, 100k, 1%, 0402
VISHAY, CRCW0402100KFKED
17
2
RSD1, RSD2
RES., CHIP, 5.1M, 5%, 0402
VISHAY, CRCW04025M10JNED
18
2
R5, R25
RES., CHIP, 0, 0402
VISHAY, CRCW04020000Z0ED
19
5
R16, R24, R71, R73, R83
RES., CHIP, 0, 0603
VISHAY, CRCW06030000Z0EA
20
1
R45
SENSE RES., 0.010Ω, 1W, 1%, 2512
PANASONIC, ERJ-M1WSF10MU
21
1
R48
SENSE RES., 0.001Ω, 1W, 1%, 2512
PNANSONIC, ERJ-M1WTF1M0U
22
0
R29, R30, R31, R32, R33, R34, R35,
R36, R37, R38, R39, R40, R53, R68,
R72, R74, R75, R78, R82, R90, R91,
R92 (OPT)
OPTIONAL
23
2
R7, R27
RES., CHIP, 2.67k, 1%, 0402
VISHAY, CRCW04022K67FKED
24
1
R9
RES., CHIP, 1.24k, 1%, 0402
VISHAY, CRCW04021K24FKED
25
13
R10, R11, R13, R14, R17, R19, R21,
R28, R41, R42, R43, R44, R86
RES., CHIP, 10k, 1%, 0603
VISHAY, CRCW060310K0FKEA
22
1
R12
RES., CHIP, 64.9k, 1%, 0402
VISHAY, CRCW040264K9FKED
23
4
R57, R58, R59, R60
RES., CHIP, 1k, 1%, 0402
VISHAY, CRCW04021K00FKED
24
2
R63, R65
RES., CHIP, 121k, 1%, 0402
VISHAY, CRCW0402121KFKED
25
2
R64, R66
RES., CHIP, 887k, 1%, 0402
VISHAY, CRCW0402887KFKED
26
2
R69, R70
RES., CHIP, 10, 1%, 0603
VISHAY, CRCW060310R0FKEA
27
2
R76, R77
RES., CHIP, 4.99k, 1%, 0603
VISHAY, CRCW06034K99FKEA
28
5
R62, R67, R98, R99, R101
RES., CHIP, 0, 0402
VISHAY, CRCW04020000Z0ED
VISHAY, CRCW06030000Z0EA
29
2
R61, R100
RES., CHIP, 0, 0603
30
0
R22, R46
OPTIONAL
31
0
R18
OPTIONAL
32
0
R20
OPTIONAL
33
0
C50
OPTIONAL
34
0
C54
OPTIONAL
35
0
C55
OPTIONAL
dc2312afb
14
DEMO MANUAL
DC2312A-A/DC2312A-B
PARTS LIST DC2312A-B
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
Hardware – For Demo Board Only
1
28
E1-E4, E7-E19, E21-E31
TESTPOINT, TURRET, .094"
MILL-MAX, 2501-2-00-80-00-00-07-0
2
2
J1, J2
BANANA SMALL
KEYSTONE, 575-4
3
4
J3, J4, J8, J9
STUD, TEST PIN
PEM, KFH-032-10
4
8
J3, J4, J8, J9 ( X2 )
NUT, BRASS 10-32
ANY #10-32M/S BR PL
5
4
J3, J4, J8, J9
RING, LUG #10
KEYSTONE, 8205
6
4
J3, J4, J8, J9
WASHER, TIN PLATED BRASS
ANY #10 EXT BZ TN
7
4
JP1, JP2, JP4, JP6
HEADER, 3 PIN 0.079 SINGLE ROW
WURTH, 620 003 111 21
8
4
JP1, JP2, JP4, JP6
SHUNT
SAMTEC, 2SN-BK-G
9
2
SW3, SW4
CONNECTOR, SUB MINIATURE SLIDE
SWITCHES
C&K.,JS202011CQN
10
3
J7, J10, J14
CONN., BNC PC MOUNT RECEPT. JACK,
50Ω, TF-4 POST
CONNEX, 112404
11
1
J11
HEADER 12POS 2MM STR DL PCB
FCI, 98414-G06-12ULF
12
1
J12
CONN., HEADER, 2mm × 7mm, 2mm, R/A (F)
SULLINS, NPPN072FJFN-RC
13
1
J13
CONN., HEADER, 2mm × 7mm, 2mm, R/A (M)
MOLEX, 87760-1416
14
1
J15
HEADER, 4 PINS, SHROUDED
HIROSE, DF3A-4P-2DSA
dc2312afb
15
A
B
C
D
VIN
VDD25
VDD25
VDD33
R39 OPT
R37 OPT
R35 OPT
R33 OPT
R31 OPT
C3
330uF
16V
ASEL0
PGOOD1
PGOOD0
RUN1
RUN0
FAULT1
FAULT0
ASEL1
R40 OPT
5
PHAS_CFG
R38 OPT
FREQ_CFG
R36 OPT
VOUT1_CFG
R34 OPT
VOUT0_CFG
R32 OPT
+
VIN
SHARE_CLK
SYNC
ALERTB
SDA
SCL
+
R30 OPT
R44 10k 0603
R43 10k 0603
R41 10k 0603
R28 10k 0603
R21 10k 0603
R19 10k 0603
R17 10k 0603
R14 10k 0603
R13 10k 0603
R11 10k 0603
R10 10k 0603
R29 OPT
E4
E3
E2
J2
J1
VDD33
VDD25
VDD33
GND
GND
7V-14V
VIN
C4
330uF
16V
1
SYNC
PGOOD1
PGOOD0
RUN1
RUN0
FAULT1
FAULT0
ALERTB
SDA
SCL
C5
0.1uF
16V
C41
OPT
30
39
21
20
19
18
17
16
23
8
27
6
15
14
13
12
11
10
9
PHAS_CFG
FREQ_CFG
VOUT1_CFG
IAVG1
IAVG0
U2
LTC3882EUJ-1
VOUT0_CFG
ASEL1
ASEL0
1uF
C8
VDD25
SHARE_CLK
SYNC
PGOOD1
PGOOD0
RUN1
RUN0
FAULT1
FAULT0
ALERT
SDA
SCL
C7
2.2uF
VDD33
VOUT0
RUN0
FAULT0
VSENSE0-
VSENSE0+
IAVG0
VFB1
COMP1
R49 OPT 2512
R101 OPT
R100 OPT 0603
OPT
OPT
R99
OPT
R98
OPT
VDD33
OPT 0603
R67
R62
R61
ISENSE0-
4
VOUT1
RUN1
FAULT1
VSENSE1-
VSENSE1+
PWM1
ISENSE1+
ISENSE1-
VSENSE1+
VSENSE1-
FB1
COMP1
TSNS1
TSNS0
COMP0
FB0
VSENSE0-
VSENSE0+
COMP0
IAVG1
PWM0
VCC
ISENSE0+
OPTIONAL FOR 2-PHASE OPERATION
VDD33
C37
OPT
IAVG1
PHAS_CFG
FREQ_CFG
VOUT1_CFG
VOUT0_CFG
ASEL1
ASEL0
SHARE_CLK
IAVG0
R1
35
VSENSE0-
ISNS1+
PWM1
26
P4
VDR
P3
2
PGND
PGND
PGND
GL
GL
ZCD#
GL
EN/FAULT#
PWM
VSENSE1+
VSENSE0+
28
15
34
35
27
2
31
1
C52
R15
0.1uF 24.9K
28
15
34
35
27
R18 1.24K
R58 1k
1
C53
R2
0.1uF 24.9K
31
R9 1.24K
C35
VDR 1uF
R57 1k
VFB1
680pF
C55
680pF
VFB0
R60 1k
R59 1k
C2
1uF
PGND
PGND
PGND
GL
GL
ZCD#
GL
EN/FAULT#
PWM
4
U1
AGND
29
32
1uF
C31
1. ALL RESISTORS ARE IN OHMS, 0402.
ALL CAPACITORS ARE IN MICROFARADS, 0402.
2. INSTALL SHUNTS AS SHOWN.
3
VIN
PGND
VIN
U3 FDMF5820DC
AGND
VDR
FDMF5820DC
PGND
NOTE: UNLESS OTHERWISE SPECIFIED
VSENSE1+
ISNS1-
32
31
33
VSENSE1-
COMP1
34
C50
29
10pF
C54 220pF
10pF
TSNS1
R20 53.6k
TSNS0
C30
C21
VDR
COMP0
R12 53.6k C22 220pF
28
3
2
1
40
VSENSE0+
ISNS0+
ISNS0-
38
37
36
PWM0
7
C9
1uF
P2
P1
VDR
C1
1uF
8
3
30
TMON
E1
24
VDD33
22
VDD25
IAVG_GND
5
25
VCC
4
VINSNS
GND
41
3
VCC
PGND
14
3
VCC
PGND
14
12
32
PGND
13
30
TMON
AGND
PGND
12
SW
26
SW
25
SW
VDR
9
20
19
18
17
16
7
5
33
11
10
20
19
18
17
16
7
5
33
11
10
C36
L1
L2
C42
R27
2.67k
0.22uF
0.17uH
FP1007R3-R17-R
100nF
C34
22uF
1210
C33
22uF
1210
VIN
C48
10nF
TSNS1
0.22uF
C20
R7
2.67k
C32
10nF
TSNS0
C10
22uF
1210
0.17uH
FP1007R3-R17-R
100nF
0
R25 0
C11
R5
C6
22uF
1210
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
SW
SW
SW
SW
SW
PHASE
BOOT
VIN
VIN
VIN
SW
SW
SW
SW
SW
PHASE
BOOT
VIN
VIN
VIN
VIN
2
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.
24
4
23
PGND
13
SW
24
AGND
SW
PVCC
SW
25
29
PVCC
PGND
AGND
23
6
26
4
AGND
6
NC
SW
VIN
SW
21
VIN
SW
22
NC
SW
9
VIN
SW
8
VIN
SW
22
16
21
5
C13
100uF
1206
100uF
1206
100uF
1206
100uF
1206
C39
HAORAN W.
APP ENG.
SCALE = NONE
HZ
PCB DES.
APPROVALS
C38
C14
100uF
1206
C40
100uF
1206
C27
470uF
2.5V
C26
470uF
2.5V
C19
470uF
2.5V
C28
470uF
2.5V
+
R46
0
0603
R22
0
0603
J8
J9
J4
VOUT1-
E19
GND
VOUT1
ADJ. UP TO 2V
MAX 35A
VOUT1+
VOUT0-
VOUT0+
GND
VOUT0
ADJ. UP TO 2V
MAX 35A
E9
E8
E7
DATE
7-27-15
N/A
DATE:
SIZE
1
SHEET 1
DEMO CIRCUIT 2312A-A
LTC3882EUJ-1
Thursday, October 29, 2015
IC NO.
OF 3
REV.
2
1630 McCarthy Blvd.
Milpitas, CA 95035
www.linear.com
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
0603
J3
HAORAN W.
APPROVED
HIGH EFFICIENCY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
TECHNOLOGY
VSENSE1-
+
+
+
VOUT1
VSENSE0-
R16
0
0603
R24 0
C18
470uF
2.5V
VSENSE1+
C17
470uF
2.5V
C16
470uF
2.5V
C15
470uF
2.5V
VSENSE0+
+
+
+
PRODUCTION
VOUT0
1
REVISION HISTORY
DESCRIPTION
+
2
REV
TITLE: SCHEMATIC
MMBT3906LT1G
C43
Q6
C12
100uF
1206
C23
MMBT3906LT1G
100uF
1206
Q1
__
ECO
A
B
C
D
DEMO MANUAL
DC2312A-A/DC2312A-B
SCHEMATIC DIAGRAM DC2312A-A
dc2312afb
A
B
C
GND
GND
GND
VCC
E17
E16
E14
E12
VCC
VIN
5
COUT4
0.1uF
16V
0603
+ CIN3
22uF
35V
7343
CFFW1
22pF
RPG1
100k
R65
121k
1%
R64
887k
1%
U6
JP6
VCC
16
15
RSD1
5.1M
3
Vishay
IHLP1616BZER4R7M11
L4
4.7uH
LTC3607PGOOD1
COUT7
10uF
16V
0805
1
2
3
LTC3607EMSE
OFF
ON
SW1
PGOOD1
MODE/SYNC
4
RF
100
CF
0.1uF
0603
5
CIN1
10uF
25V
1206
VFB1
13
VIN
14
RUN1
1
SVIN
11
SW2
PGOOD2
L3
4.7uH
JP4
VDR
RSD2
5.1M
1
2
3
Vishay
IHLP1616BZER4R7M11
6
9
LTC3607PGOOD1
RUN2
4
PVIN1
PGND1
2
GND
17
SGND
SGND
8
10
PVIN2
PGND2
7
VFB2
12
ON
COUT3
10uF
16V
0805
RPG2
100k
OFF
3
R63
121k
1%
R66
887k
1%
CFFW2
22pF
GND
VDR
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
E15
E13
2
PULSE IN
E10
1
E11
HAORAN W.
SCALE = NONE
HZ
PCB DES.
APP ENG.
APPROVALS
C58
1uF
0805
GND
J14
C57
1uF
0805
R45
0.01
2512
1
R53
1
1
VOUT1
VOUT0
J7
IOUT
TST
DATE:
N/A
SIZE
1
SHEET 2
DEMO CIRCUIT 2312A-A
LTC3882EUJ-1
Friday, August 14, 2015
IC NO.
2
OF 3
REV.
HIGH EFFICIENCY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
VOUT1
NOTE:
PULSE OUT
10mV / AMP
C47
1uF
0805
J10
OPT
R48
0.001
2512
TECHNOLOGY
VOUT1
TITLE: SCHEMATIC
VOUT0
10K
0603
R42
4
Q3
RJK0305DPB
DYNAMIC LOAD CIRCUIT
DO NOT EXCEED 5% DUTY CYCLE!
VOUT0
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.
COUT5
0.1uF
16V
0603
VDR
2
5
1
2
3
D
3
2
3
4
5
4
2
3
4
5
2
3
4
5
5
A
B
C
D
DEMO MANUAL
DC2312A-A/DC2312A-B
SCHEMATIC DIAGRAM DC2312A-A
dc2312afb
17
A
B
C
GND
E21
4
3
2
1
SDA
SCL
WP
VCC
24LC025-I/ST
VSS
A2
A1
A0
U5
TO DC1613A
AUXP
SDA
GND
SCL
LGKPWR
ALERTB
GPIO_1
OUTEN_0
OUTEN_1
GND
AUXSCL
AUXSDA
J11
TO DC2086A
AUX3V4
SCL
GND
SDA
J15
100nF
5
VIN
0603
2
1
R87
15.8k
0603
Q19
Si2365EDS
VDD33
R86 10K
3V3
EESDA
EESCL
5
EEWP
7
6
3
C45 0603
3V3
AUX3V4
8 AUXVCC
1
2
3
4
5
6
7
8
9
10
11
12
4
3
2
1
VDD33
R76
4.99K
0603
2
PGOOD0
R77
4.99K
0603
ALERTB
E18
1
D11
R75
R74
3V3
E22
ALERTB
4
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
SCL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
2N7002A
Q24
PG O O D 0
GREEN
R94
200
0603
OPT
OPT
PGOOD1
J13DEMO HEADER (M)
SDA
E23
SDA
1
D9
E24
SCL
3V3
2N7002A
Q23
GREEN
PG O O D 1
R93
200
0603
VIN
SHARE_CLK
SYNC
R92
OPT
R78
OPT
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
1
5
ON
SW3
RUN1
OFF
D7
OPT
C
NC
FAULT0-FAULT1
3
JP1
R90
OPT
2
R91
OPT
C29
10nF
0603
R69
10
0603
1
OFF
5
ON
SW4
RUN0
C
NC
RUN0-RUN1
3
JP2
D4
OPT
2
2
C44
10nF
0603
R70
10
0603
1
E31
E30
E29
E28
E27
FAULT1
SGND
RUN1
RUN1
RUN0
RUN0
FAULT0
FAULT0
FAULT1
ALERTB
1
D10
3V3
FAULT0
HAORAN W.
APP ENG.
2
SCALE = NONE
HZ
PCB DES.
APPROVALS
R84
127
0603
ALERTB
RED
Si2365EDS
Q20
D5
R81
127
0603
FAULT1
R80
127
0603
FA U LT 1
RED
www.linear.com
DATE:
N/A
SIZE
1
SHEET 3
DEMO CIRCUIT 2312A-A
LTC3882EUJ-1
Friday, August 14, 2015
IC NO.
OF 3
REV.
2
LTC Confidential-For Customer Use Only
Fax: (408)434-0507
D6
Si2365EDS
Q22
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
1
3V3
HIGH EFFICIENCY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
TECHNOLOGY
FA U LT 0
RED
Si2365EDS
Q21
TITLE: SCHEMATIC
1
3V3
PSM STACKING CONNECTORS:
J12, FEMALE, CONN RECEPT 2MM DUAL R/A 14POS, Sullins Conn. NPPN072FJFN-RC
J13, MALE, CONN HEADER 14POS 2MM R/A GOLD, Molex Connector Corp. 87760-1416
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
3
OPT
J12 DEMO HEADER (F)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
R72
0603
R71 0
0603
R73 0
CUSTOMER NOTICE
R82
OPT
1206
R83
0
0603
E26
E25
R68 OPT
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
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
3V3
SYNC
SHARE_CLK
2
3
D8
2
2
ALL PARTS ON THIS PAGE ARE FOR DEMO BOARD ONLY, NOT NEEDED IN CUSTOMER DESIGN
3
4
1
6
3
D
1
2
3
AUX3V4
3
2
4
1
6
3
4
3
2
2
18
3
5
A
B
C
D
DEMO MANUAL
DC2312A-A/DC2312A-B
SCHEMATIC DIAGRAM DC2312A-A
dc2312afb
A
B
C
D
VIN
VDD25
VDD25
VDD33
R39 OPT
R37 OPT
R35 OPT
R33 OPT
R31 OPT
C3
330uF
16V
ASEL0
PGOOD1
PGOOD0
RUN1
RUN0
FAULT1
FAULT0
ASEL1
R40 OPT
5
PHAS_CFG
R38 OPT
FREQ_CFG
R36 OPT
VOUT1_CFG
R34 OPT
VOUT0_CFG
R32 OPT
+
VIN
SHARE_CLK
SYNC
ALERTB
SDA
SCL
+
R30 OPT
R44 10k 0603
R43 10k 0603
R41 10k 0603
R28 10k 0603
R21 10k 0603
R19 10k 0603
R17 10k 0603
R14 10k 0603
R13 10k 0603
R11 10k 0603
R10 10k 0603
R29 OPT
E4
E3
E2
J2
VDD33
VDD25
VDD33
GND
GND
7V-14V
J1
C4
330uF
16V
1
SYNC
PGOOD1
PGOOD0
RUN1
RUN0
FAULT1
FAULT0
ALERTB
SDA
SCL
C5
0.1uF
16V
C41
22pF
30
39
21
20
19
18
17
16
23
8
27
6
15
14
13
12
11
10
9
PHAS_CFG
FREQ_CFG
VOUT1_CFG
IAVG1
IAVG0
U2
LTC3882EUJ-1
VOUT0_CFG
ASEL1
ASEL0
1uF
C8
VDD25
SHARE_CLK
SYNC
PGOOD1
PGOOD0
RUN1
RUN0
FAULT1
FAULT0
ALERT
SDA
SCL
C7
2.2uF
VDD33
VOUT0
RUN0
FAULT0
VSENSE0-
VSENSE0+
IAVG0
VFB1
COMP1
R49 0
R101 0
R100 0
0
0
R99
0
R98
0
0
R67
R62
R61
0603
2512
0603
VDD33
ISENSE0-
4
VOUT1
RUN1
FAULT1
VSENSE1-
VSENSE1+
PWM1
ISENSE1+
ISENSE1-
VSENSE1+
VSENSE1-
FB1
COMP1
TSNS1
TSNS0
COMP0
FB0
VSENSE0-
VSENSE0+
COMP0
IAVG1
PWM0
VCC
ISENSE0+
OPTIONAL FOR 2-PHASE OPERATION
VDD33
C37
22pF
IAVG1
PHAS_CFG
FREQ_CFG
VOUT1_CFG
VOUT0_CFG
ASEL1
ASEL0
SHARE_CLK
IAVG0
R1
22
VIN
24
VDD33
25
VCC
4
VINSNS
E1
4
35
VSENSE0-
ISNS1+
PWM1
26
P4
VDR
C35
VDR 1uF
OPT
1.24k
R9
R18
R58 1k
R57 1k
VFB1
OPT
P3
C55
470pF
VFB0
R60 1k
R59 1k
C2
1uF
PGND
PGND
PGND
GL
GL
ZCD#
GL
EN/FAULT#
PWM
VSENSE1+
VSENSE0+
28
15
34
35
27
2
31
1
C52
R15
0.1uF 24.9K
28
15
34
35
27
2
31
1
C53
R2
0.1uF 24.9K
PGND
PGND
PGND
GL
GL
ZCD#
GL
EN/FAULT#
PWM
C1
1uF
U1
AGND
29
32
1uF
C31
1. ALL RESISTORS ARE IN OHMS, 0402.
ALL CAPACITORS ARE IN MICROFARADS, 0402.
2. INSTALL SHUNTS AS SHOWN.
3
VIN
PGND
VIN
U3 FDMF5820DC
AGND
VDR
FDMF5820DC
PGND
NOTE: UNLESS OTHERWISE SPECIFIED
VSENSE1+
ISNS1-
32
31
33
VSENSE1-
COMP1
34
C50
29
OPT
C54 OPT
10pF
TSNS1
R20 OPT
TSNS0
C30
C21
VDR
COMP0
R12 64.9K C22 220pF
28
3
2
1
40
VSENSE0+
ISNS0+
ISNS0-
38
37
36
PWM0
7
C9
1uF
P2
P1
VDR
4
3
13
30
VDD25
IAVG_GND
5
14
3
14
GND
3
VCC
PGND
VCC
PGND
41
30
TMON
PGND
TMON
13
PGND
12
SW
25
SW
VDR
9
20
19
18
17
16
7
5
33
11
10
20
19
18
17
16
7
5
33
11
10
C36
L1
L2
C42
R27
2.67k
0.22uF
0.17uH
FP1007R3-R17-R
100nF
C34
22uF
1210
C33
22uF
1210
VIN
C48
10nF
TSNS1
0.22uF
C20
R7
2.67k
C32
10nF
TSNS0
C10
22uF
1210
0.17uH
FP1007R3-R17-R
100nF
0
R25 0
C11
R5
C6
22uF
1210
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
SW
SW
SW
SW
SW
PHASE
BOOT
VIN
VIN
VIN
SW
SW
SW
SW
SW
PHASE
BOOT
VIN
VIN
VIN
VIN
2
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.
24
PGND
AGND
PGND
12
32
AGND
SW
24
AGND
SW
PVCC
SW
25
29
PVCC
26
4
AGND
6
NC
SW
23
6
NC
SW
23
SW
26
8
VIN
SW
VIN
SW
21
9
VIN
22
8
VIN
SW
22
SW
21
5
C13
100uF
1206
100uF
1206
100uF
1206
100uF
1206
C39
HAORAN W.
APP ENG.
SCALE = NONE
HZ
PCB DES.
APPROVALS
C38
C14
100uF
1206
C40
100uF
1206
C27
470uF
2.5V
C26
470uF
2.5V
C19
470uF
2.5V
C28
470uF
2.5V
+
R46
OPT
0603
R22
OPT
0603
J8
J9
J4
VOUT1-
E19
GND
VOUT1
ADJ. UP TO 2V
MAX 35A
VOUT1+
VOUT0-
VOUT0+
GND
VOUT0
ADJ. UP TO 2V
MAX 35A
E9
E8
E7
DATE
7-27-15
DATE:
N/A
SIZE
1
SHEET 1
DEMO CIRCUIT 2312A-B
LTC3882EUJ-1
Thursday, October 29, 2015
IC NO.
OF 3
REV.
2
1630 McCarthy Blvd.
Milpitas, CA 95035
www.linear.com
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
0603
J3
HAORAN W.
APPROVED
HIGH EFFICIENCY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
TECHNOLOGY
VSENSE1-
+
+
+
VOUT1
VSENSE0-
R16
0
0603
R24 0
C18
470uF
2.5V
VSENSE1+
C17
470uF
2.5V
C16
470uF
2.5V
C15
470uF
2.5V
VSENSE0+
+
+
+
PRODUCTION
VOUT0
1
REVISION HISTORY
DESCRIPTION
+
2
REV
TITLE: SCHEMATIC
MMBT3906LT1G
C43
Q6
C12
100uF
1206
C23
MMBT3906LT1G
100uF
1206
Q1
__
ECO
A
B
C
D
DEMO MANUAL
DC2312A-A/DC2312A-B
SCHEMATIC DIAGRAM DC2312A-B
dc2312afb
19
A
B
C
GND
GND
GND
VCC
E17
E16
E14
E12
VCC
5
COUT4
0.1uF
16V
0603
+ CIN3
22uF
35V
7343
VIN
CFFW1
22pF
RPG1
100k
R65
121k
1%
R64
887k
1%
ON
U6
JP6
VCC
16
15
RSD1
5.1M
3
Vishay
IHLP1616BZER4R7M11
L4
4.7uH
LTC3607PGOOD1
COUT7
10uF
16V
0805
1
2
3
LTC3607EMSE
OFF
SW1
PGOOD1
MODE/SYNC
4
RF
100
CF
0.1uF
0603
5
CIN1
10uF
25V
1206
VFB1
13
VIN
14
RUN1
1
SVIN
11
SW2
PGOOD2
L3
4.7uH
JP4
VDR
RSD2
5.1M
1
2
3
Vishay
IHLP1616BZER4R7M11
6
9
LTC3607PGOOD1
RUN2
4
PVIN1
PGND1
2
GND
17
SGND
SGND
8
10
PVIN2
PGND2
7
VFB2
12
D
ON
COUT3
10uF
16V
0805
RPG2
100k
OFF
3
3
R63
121k
1%
R66
887k
1%
CFFW2
22pF
GND
VDR
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
E15
E13
2
PULSE IN
E10
1
E11
HAORAN W.
SCALE = NONE
HZ
PCB DES.
APP ENG.
APPROVALS
C58
1uF
0805
GND
J14
C57
1uF
0805
R45
0.01
2512
1
R53
1
1
VOUT1
VOUT0
J7
IOUT
TST
DATE:
N/A
SIZE
1
SHEET 2
DEMO CIRCUIT 2312A-B
LTC3882EUJ-1
Monday, August 10, 2015
IC NO.
2
OF 3
REV.
HIGH EFFICIENCY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
VOUT1
NOTE:
PULSE OUT
10mV / AMP
C47
1uF
0805
J10
OPT
R48
0.001
2512
TECHNOLOGY
VOUT1
TITLE: SCHEMATIC
VOUT0
10K
0603
R42
4
Q3
RJK0305DPB
DYNAMIC LOAD CIRCUIT
DO NOT EXCEED 5% DUTY CYCLE!
VOUT0
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.
COUT5
0.1uF
16V
0603
VDR
2
2
3
4
5
5
1
2
3
4
2
3
4
5
20
2
3
4
5
5
A
B
C
D
DEMO MANUAL
DC2312A-A/DC2312A-B
SCHEMATIC DIAGRAM DC2312A-B
dc2312afb
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
E21
4
3
2
1
SDA
SCL
WP
VCC
24LC025-I/ST
VSS
A2
A1
A0
U5
TO DC1613A
AUXP
SDA
GND
SCL
LGKPWR
ALERTB
GPIO_1
OUTEN_0
OUTEN_1
GND
AUXSCL
AUXSDA
J11
TO DC2086A
AUX3V4
SCL
GND
SDA
J15
100nF
5
VIN
0603
2
1
R87
15.8k
0603
Q19
Si2365EDS
VDD33
R86 10K
3V3
EESDA
EESCL
5
EEWP
7
6
3
C45 0603
3V3
AUX3V4
8 AUXVCC
1
2
3
4
5
6
7
8
9
10
11
12
4
3
2
1
VDD33
R76
4.99K
0603
2
PGOOD0
R77
4.99K
0603
ALERTB
E18
1
D11
R75
R74
3V3
E22
ALERTB
4
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
SCL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
2N7002A
Q24
PG O O D 0
GREEN
R94
200
0603
OPT
OPT
PGOOD1
J13DEMO HEADER (M)
SDA
E23
SDA
1
D9
E24
SCL
3V3
2N7002A
Q23
GREEN
PG O O D 1
R93
200
0603
VIN
SHARE_CLK
SYNC
R92
OPT
R78
OPT
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
1
5
ON
SW3
RUN1
OFF
D7
OPT
C
NC
FAULT0-FAULT1
3
JP1
R90
OPT
2
R91
OPT
C29
10nF
0603
R69
10
0603
1
OFF
5
ON
SW4
RUN0
C
NC
RUN0-RUN1
3
JP2
D4
OPT
2
2
C44
10nF
0603
R70
10
0603
1
E31
E30
E29
E28
E27
FAULT1
SGND
RUN1
RUN1
RUN0
RUN0
FAULT0
FAULT0
FAULT1
ALERTB
1
D10
3V3
FAULT0
HAORAN W.
APP ENG.
2
SCALE = NONE
HZ
PCB DES.
APPROVALS
R84
127
0603
ALERTB
RED
Si2365EDS
Q20
D5
R81
127
0603
FAULT1
R80
127
0603
FA U LT 1
RED
www.linear.com
DATE:
N/A
SIZE
1
SHEET 3
DEMO CIRCUIT 2312A-B
LTC3882EUJ-1
Monday, August 10, 2015
IC NO.
OF 3
REV.
2
LTC Confidential-For Customer Use Only
Fax: (408)434-0507
D6
Si2365EDS
Q22
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
1
3V3
HIGH EFFICIENCY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
TECHNOLOGY
FA U LT 0
RED
Si2365EDS
Q21
TITLE: SCHEMATIC
1
3V3
PSM STACKING CONNECTORS:
J12, FEMALE, CONN RECEPT 2MM DUAL R/A 14POS, Sullins Conn. NPPN072FJFN-RC
J13, MALE, CONN HEADER 14POS 2MM R/A GOLD, Molex Connector Corp. 87760-1416
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
3
OPT
J12 DEMO HEADER (F)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
R72
0603
R71 0
0603
R73 0
CUSTOMER NOTICE
R82
OPT
1206
R83
0
0603
E26
E25
R68 OPT
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
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
3V3
SYNC
SHARE_CLK
2
3
D8
2
2
ALL PARTS ON THIS PAGE ARE FOR DEMO BOARD ONLY, NOT NEEDED IN CUSTOMER DESIGN
3
4
1
6
3
D
1
2
3
AUX3V4
3
2
4
1
6
3
4
3
2
2
3
5
A
B
C
D
DEMO MANUAL
DC2312A-A/DC2312A-B
SCHEMATIC DIAGRAM DC2312A-B
dc2312afb
21
DEMO MANUAL
DC2312A-A/DC2312A-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
dc2312afb
22 Linear Technology Corporation
LT 0116 REV B • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2015