Linear Technology DC2312A-A Quick setup guide

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DEMO MANUAL
DC2312A-A/DC2312A-B
DESCRIPTION
LTC3882EUJ-1 High Efficiency
Step-Down DC/DC Converter
with Power System Management
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 dif-
ferential VOUT sense and dedicated PGOOD output on
both channels, compared to LTC3882. The LTC3882-1
has the PMBus interface and power system manage-
ment functions.
There are two versions of the boards available:
n DC2312A-A: Dual phase dual output configuration. De-
faultoutputsettingVOUT0
=1.5V/35A,VOUT1=1.0V/35A.
n DC2312A-B: Dual phase single output configuration.
Default output setting VOUT0 = 1.0V/70A.
The DC2312A powers up to default settings and pro-
duces power based on configuration resistors or with
its nonvolatile memory without the need for any serial
bus communication. This allows easy evaluation of the
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.
PERFORMANCE SUMMARY
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 pa-
rameters 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
Specifications are at TA= 25°C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Supply Range 7 12 14 V
VOUT0 Output Voltage Range (-A Version) IOUT0 = 0A to 35A, VIN = 7V to 14V 0.5 1.5 2.0* V
IOUT0 Output Current Range (-A Version) 0 35** A
VOUT1 Output Voltage Range (-A Version) IOUT1 = 0A to 35A, VIN = 7V to 14V 0.5 1.0 2.0* V
IOUT1 Output Current Range (-A Version) 0 35** A
VOUT0 Output Voltage Range (-B Version) IOUT0 = 0A to 70A, VIN = 7V to 14V 0.5 1.0 2.0* V
IOUT0 Output Current Range (-B Version) 0 70** A
FSW Factory Default Switching (-A Version) 500 kHz
FSW Factory Default Switching (-B Version) 450 kHz
EFFICIENCY Full Load Efficiency (-A Version) VOUT0 = 1.5V, IOUT0 = 35A, See Figure 5 90.6 %
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.

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DEMO MANUAL
DC2312A-A/DC2312A-B
QUICK START PROCEDURE
Figure1. Demo Setup with PC
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
JUMPER POSITION FUNCTION
JP1 NC Untie GPIO0B to GPIO1B
JP2 NC Untie RUN0 to RUN1
JP4 ON External 5V VDR for DrMOS
JP6 ON External 5V VCC for LTC3882-1
DC2312A-B Version
JUMPER POSITION FUNCTION
JP1 CTie GPIO0B to GPIO1B
JP2 CTie RUN0 to RUN1
JP4 ON External 5V VDR for DrMOS
JP6 ON External 5V VCC for LTC3882-1
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 ex-
ceed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.
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.
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
setpoints, OV/UV limits, temperature fault limits, sequenc-
ing parameters, the fault log, fault responses, GPIO and
other functionality. The DC1613A dongle may be plugged
in regardless of whether or not VIN is present. Dongle can
be hot plugged.
USB TO I2C/PMBUS
DONGLE DC1613A
LTC3882-1
DEMO BOARD
DC2312A
+12V
POWER SUPPLY
USB CABLE
12-PIN
CONNECTOR
LOAD
LOAD
VOUT0
VIN
DC2312A F01
VOUT1

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DEMO MANUAL
DC2312A-A/DC2312A-B
Figure2. Power Test Setup for DC2312A-A
QUICK START PROCEDURE
POWER
SUPPLY
VOUT0
LOAD
SHUNT
IOUT0
VOUT1
LOAD
SHUNT
IOUT1
IIN
VIN
VOUT1
VOUT0
DC1613A
CONNECTOR
A
+
–
+
–
–
+
+
–
+
–
+
–
+–
DC2312A F02

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DEMO MANUAL
DC2312A-A/DC2312A-B
Figure3. Power Test Setup for DC2312A-B
QUICK START PROCEDURE
POWER
SUPPLY
VOUT0
LOAD 1
SHUNT
IOUT0_1
VOUT0
LOAD 2
SHUNT
IOUT0_2
IIN
VIN
VOUT0
DC1613A
CONNECTOR
A
+
–
–
+
+
–
+
–
+
–
+–
DC2312A F03
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.

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DEMO MANUAL
DC2312A-A/DC2312A-B
COMBINING DC2312A WITH OTHER DIGITAL POWER
DEMO BOARDS
The DC2312A may be plugged together in a multi-board
array with other LT C power system management boards
using J12 and J13.
MEASURING OUTPUT RIPPLE VOLTAGE
An accurate ripple measurement may be performed by
using the configuration in Figure 4 across C13 or C39.
QUICK START PROCEDURE
MEASURING EFFICIENCY (SEE FIGURES 5 AND 6)
To accurately measure efficiency of any configuration, do
the following:
n Set JP4 and JP6 on the “OFF” position.
n Connect external 5V supply to VDR and VCC turrets and
measure its input current.
n Measure VIN across the input ceramic capacitor (C10,
C6). Measure VOUT across the output ceramic capaci-
tor (C13, C39).
n Add the loss from external 5V supply into the efficiency
calculation.
LOAD CURRENT (A)
0
5
10
15
20
25
30
35
65
70
75
80
85
90
95
EFFICIENCY (%)
DC2312A F05
VOUT0 = 1.5V
VOUT1 = 1.0V
LOAD CURRENT (A)
0
10
20
30
40
50
60
70
65
70
75
80
85
90
95
EFFICIENCY (%)
DC2312A F06
VOUT0 = 1.0V
Figure4. Measuring Output Voltage Ripple
Figure5. DC2312A-A, Typical Efficiency Curves,
VIN = 12V, FSW = 500kHz, CCM
Figure6. DC2312A-B, Typical Efficiency Curves,
VIN = 12V, FSW = 450kHz, CCM
+ –
VOUT GND
COUT

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DEMO MANUAL
DC2312A-A/DC2312A-B
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
QUICK START PROCEDURE

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DEMO MANUAL
DC2312A-A/DC2312A-B
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
QUICK START PROCEDURE

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DEMO MANUAL
DC2312A-A/DC2312A-B
LTpowerPlay is a powerful Windows-based develop-
ment 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
LTpowerPlay SOFTWARE GUI
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 soft-
ware 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 LT C Digital
Power Products visit Help. View online help on the
LTpowerPlay menu.
Figure12. LTpowerPlay Main Interface

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DEMO MANUAL
DC2312A-A/DC2312A-B
ThefollowingproceduredescribeshowtouseLTpowerPlay
to monitor and change the settings of LTC3882-1 (taking
DC2312A-A as an example).
1. Download and install the LTPowerPlay GUI:
http://www.linear.com/LTpowerPlay
2. Launch the LTpowerPlay GUI.
a. TheGUIshouldautomaticallyidentifytheDC2312A-A.
The system tree on the left hand side should look
like this:
LTpowerPlay QUICK START PROCEDURE
b. A blue message box shows for a few seconds in the
lowerleft handcorner, confirming thatthe LTC3882-1
is communicating:
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:
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:
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.
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.

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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

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DEMO MANUAL
DC2312A-A/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 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
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, 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 VISHAY, CRCW06030000Z0EA
31 0 C37, C41 OPTIONAL
32 1 R18 RES., CHIP, 1.24k, 1%, 0402 VISHAY, CRCW04021K24FKED
33 0 R49 OPTIONAL
PARTS LIST DC2312A-A

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DEMO MANUAL
DC2312A-A/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, 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
PARTS LIST DC2312A-A

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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

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dc2312afb
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
29 2 R61, R100 RES., CHIP, 0, 0603 VISHAY, CRCW06030000Z0EA
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

15
dc2312afb
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

16
dc2312afb
DEMO MANUAL
DC2312A-A/DC2312A-B
SCHEMATIC DIAGRAM DC2312A-A
5
5
4
4
3
3
2
2
1
1
D D C C BB AA
7V-14V
16V16V
2. INSTALL SHUNTS AS SHOWN.
1. ALL RESISTORS ARE IN OHMS, 0402. ALL CAPACITORS ARE IN MICROFARADS, 0402.
NOTE: UNLESS OTHERWISE SPECIFIED
16V
FP1007R3-R17-R FP1007R3-R17-R
OPTIONAL FOR 2-PHASE OPERATIONADJ. UP TO 2V
MAX 35A
ADJ. UP TO 2V MAX 35A
ISNS0+
ISNS0-
PWM0
PWM1 ISNS1+ ISNS1-
VDD25
VDD25VDD33
VIN
VCC
VDD33
VDR
VDR
VDR
VDR
VDR
VDR
VDD33
VDD33
VDD25
FAULT0
FAULT1 SCL
VIN
SDA ALERTB
VSENSE0+ VSENSE0-
SCL
SDA
ALERTB FAULT0 FAULT1
RUN0
SYNC
SHARE_CLK
ASEL1
VOUT0_CFG
VOUT1_CFG
FREQ_CFG
PHAS_CFG
VIN
VOUT0
VSENSE0+
VSENSE0-
ASEL0
ASEL0
ASEL1
VOUT0_CFG VOUT1_CFG
FREQ_CFG
PHAS_CFG
SYNC
SHARE_CLK
RUN1
IAVG1
IAVG0
VSENSE0+
TSNS0
TSNS1 COMP1
COMP0
VSENSE1+
TSNS0 TSNS1
VSENSE1+
VSENSE1+
COMP0
COMP1
VFB1
IAVG1IAVG0 VSENSE1+VSENSE0+
VFB1
VFB0
VOUT1
RUN0 RUN1
FAULT1
FAULT0
RUN1
RUN0
VDD33
PGOOD0
PGOOD0 PGOOD1
PGOOD1
VSENSE1-
VSENSE1-
VSENSE1-
VSENSE0-
VOUT0 VOUT1
REVISION HISTORY
DESCRIPTIONDATE
APPROVED
ECO REV
HAORAN W.
PRODUCTION 51-72-72
__
REVISION HISTORY
DESCRIPTIONDATE
APPROVED
ECO REV
HAORAN W.
PRODUCTION 51-72-72
__
REVISION HISTORY
DESCRIPTIONDATE
APPROVED
ECO REV
HAORAN W.
PRODUCTION 51-72-72
__
SIZE DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGYFax: [phone]
Milpitas, CA 95035
Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Thursday, October 29, 2015
1 3
HIGH EFFICIENCY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
HZ HAORAN W.
N/A
LTC3882EUJ-1
DEMO CIRCUIT 2312A-A
SIZE DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGYFax: [phone]
Milpitas, CA 95035
Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Thursday, October 29, 2015
1 3
HIGH EFFICIENCY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
HZ HAORAN W.
N/A
LTC3882EUJ-1
DEMO CIRCUIT 2312A-A
SIZE DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGYFax: [phone]
Milpitas, CA 95035
Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Thursday, October 29, 2015
1 3
HIGH EFFICIENCY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
HZ HAORAN W.
N/A
LTC3882EUJ-1
DEMO CIRCUIT 2312A-A
R15
24.9K
R12 53.6k
P4
+
C16
470uF
2.5V
R1 1
R34 OPT
C7
2.2uF
R32 OPT
P2
C41
OPT
C22 220pF
L2
0.17uH
+
C19
470uF 2.5V
J2
GND
R60 1k
R33 OPT
C31
1uF
R35 OPT
R5 0
C23
100uF
1206
R62 OPT
C5
0.1uF
R101 OPT
C14
100uF
1206
E4
VDD25
R100 OPT 0603
R36 OPT R99 OPT
C42 0.22uF
E3
VDD33
C52 0.1uF
C20 0.22uF
R67 OPT
+
C26
470uF 2.5V
+
C17
470uF 2.5V
U2
LTC3882EUJ-1
COMP0 1
TSNS0 2
TSNS1 3
VINSNS 4
IAVG_GND
5
PGOOD0
6
PWM0 7
SYNC
8
SCL
9
SDA
10
ALERT
11
FAULT0
12
FAULT1
13
RUN0
14
RUN1
15
ASEL0
16
ASEL1
17
VOUT0_CFG
18
VOUT1_CFG
19
FREQ_CFG
20
PHAS_CFG
21
VDD25 22
SHARE_CLK
23
VDD33 24
VCC 25
PWM1 26
PGOOD1
27
COMP1 28
FB1 29
IAVG1
30
ISENSE1+ 31
ISENSE1- 32
VSENSE1+ 33
VSENSE1- 34
VSENSE0- 35
VSENSE0+ 36
ISENSE0- 37
ISENSE0+ 38
IAVG0
39
FB0 40
GND
41
R46 0
0603
E1
VIN
P1
R7
2.67k
R29 OPT
R43 10k 0603
+
C4
330uF
J1
VIN
J4
GND
+
C27
470uF 2.5V
R37 OPT
+
C18
470uF
2.5V
+
C3
330uF
C35 1uF
R30 OPT
R98 OPT
C38
100uF
1206
R44 10k 0603
+
C28
470uF 2.5V
R27
2.67k
E19
VOUT1-
Q1
MMBT3906LT1G
R24 0
0603
R10 10k 0603
R57 1k
C9
1uF
R38 OPT
R18 1.24K
GL
AGND VIN
PGND
U3 FDMF5820DC
PWM
1
ZCD#
2
VCC 3
AGND 4
BOOT 5
NC 6
PHASE 7
VIN 8
VIN 9
VIN 10 VIN 11
PGND
12
PGND
13
PGND
14
SW 16
SW 17
SW 18 SW 19
SW 20
SW
21
SW
22
SW
23
SW
24
SW
25
SW
26
GL
27
PGND
15
TMON 30
EN/FAULT#
31
AGND 32
PGND
34
GL
35
VIN 33
PGND
28
PVCC 29
C32
10nF
C39
100uF
1206
R59 1k
J8
GND
R16 0 0603
Q6
MMBT3906LT1G
R11 10k 0603
C50 10pF
GL
AGND VIN
PGND
U1 FDMF5820DC
PWM
1
ZCD#
2
VCC 3
AGND 4
BOOT 5
NC 6
PHASE 7
VIN 8
VIN 9
VIN 10
VIN 11
PGND
12
PGND
13
PGND
14
SW 16 SW 17
SW 18
SW 19
SW 20
SW
21
SW
22
SW
23
SW
24
SW
25
SW
26
GL
27
PGND
15
TMON 30
EN/FAULT#
31
AGND 32
PGND
34
GL
35
VIN 33
PGND
28
PVCC 29
E7
VOUT0+
E9
VOUT1+
R17 10k 0603
C8 1uF
E2
GND
C40
100uF
1206
C48
10nF
R20 53.6k
C37
OPT
R39 OPT
R22 0
0603
R49 OPT 2512
R13 10k 0603
R25 0
C30 10pF
J9
VOUT1
C53 0.1uF
C34 22uF 1210
C10 22uF 1210
C54 220pF
R58 1k
J3
VOUT0
+
C15
470uF 2.5V
C21
680pF
C43
100uF
1206
C36 100nF
R2
24.9K
P3
R9 1.24K
R61 OPT 0603
R28 10k 0603
C33 22uF 1210
C6 22uF 1210
R19 10k 0603
C1 1uF
C12
100uF
1206
R40 OPT
R14 10k 0603
E8
VOUT0-
R31 OPT
R41 10k 0603 R21 10k 0603
L1
0.17uH
C55
680pF
C2 1uF
C11 100nF
C13
100uF
1206

17
dc2312afb
DEMO MANUAL
DC2312A-A/DC2312A-B
SCHEMATIC DIAGRAM DC2312A-A
5
5
4
4
3
3
2
2
1
1
D D CC BB AA
NOTE: PULSE OUT 10mV / AMP
0805
2512
IOUT
TST
DYNAMIC LOAD CIRCUIT
DO NOT EXCEED 5% DUTY CYCLE!
0805
VOUT1
0805
VOUT0
ON
VD R
OFF
VC C
ON
OFF
LTC3607PGOOD1
LTC3607PGOOD1
VIN
VCC VDR
VOUT0 VOUT1
VOUT1VOUT0
VIN
SIZE DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGYFax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Friday, August 14, 2015
2 3
HIGH EFFICIENCY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
HZ HAORAN W.
N/A
LTC3882EUJ-1
DEMO CIRCUIT 2312A-A
SIZE DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGYFax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Friday, August 14, 2015
2 3
HIGH EFFICIENCY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
HZ HAORAN W.
N/A
LTC3882EUJ-1
DEMO CIRCUIT 2312A-A
SIZE DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGYFax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Friday, August 14, 2015
2 3
HIGH EFFICIENCY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
HZ HAORAN W.
N/A
LTC3882EUJ-1
DEMO CIRCUIT 2312A-A
R48 0.001 2512
RPG2
100k
COUT5
0.1uF
16V 0603
RPG1
100k
C58
1uF
RSD1 5.1M
CF 0.1uF 0603
COUT7 10uF 16V 0805
E17
GND
C57
1uF
J14
1
2
3
4
5
E15
GND
JP6
1
2 3
J7
1
2
3
4
5
E12
VCC
R64 887k 1%
R63 121k 1%
J10
1
2
3
4
5
R53 OPT
CFFW1 22pF
R65 121k 1%
L3
4.7uH
IHLP1616BZER4R7M11
Vishay
JP4
1
2 3
RF 100
E10
PULSE IN
CIN1 10uF 25V 1206
E13
VDR
E11
GND
RSD2 5.1M
+
CIN3
22uF
35V 7343
COUT3 10uF 16V 0805
E14
GND
R45 0.01
Q3
RJK0305DPB
1
2
5
3
4
C47
1uF
COUT4 0.1uF 16V 0603
R42 10K 0603
L4
4.7uH
IHLP1616BZER4R7M11
Vishay CFFW2
22pF
U6
LTC3607EMSE
PGND2
7
MODE/SYNC
15
RUN211
SGND
8
PGOOD1
16
VFB2
12
SW2 6
SW1
3
SVIN 1
PGOOD2 9
PVIN1 4
PVIN2 5
PGND1
2
VFB1
13 RUN114
GND
17
SGND
10
E16
GND
R66 887k 1%

18
dc2312afb
DEMO MANUAL
DC2312A-A/DC2312A-B
SCHEMATIC DIAGRAM DC2312A-A
5
5
4
4
3
3
2
2
1
1
DD CC
B B
A A
TO DC1613A
ALL PARTS ON THIS PAGE ARE FOR DEMO BOARD ONLY, NOT NEEDED IN CUSTOMER DESIGN
ON OFF
ON
OFF
RUN0RUN1
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
ALERTB
1206
CNC
FAULT0-FAULT1
CNC
RUN0-RUN1
TO DC2086A
1DOOGP0DOOGP
1TLUAF0TLUAF
AUXVCC
EEWP
EESDA
EESCL
AUX3V4
3V3
3V3
VIN
VIN
3V3 VDD33
3V3
3V3
3V3
3V3 3V3
ALERTB SDA SCL
RUN0 RUN1
FAULT1
FAULT0
SYNC
SHARE_CLK
ALERTB
VIN
VDD33
PGOOD0 PGOOD1
FAULT0 FAULT1
SIZE DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGYFax: [phone]
Milpitas, CA 95035
Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Friday, August 14, 2015
3 3
HIGH EFFICIENCY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
HZ HAORAN W.
N/A
LTC3882EUJ-1
DEMO CIRCUIT 2312A-A
SIZE DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGYFax: [phone]
Milpitas, CA 95035
Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Friday, August 14, 2015
3 3
HIGH EFFICIENCY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
HZ HAORAN W.
N/A
LTC3882EUJ-1
DEMO CIRCUIT 2312A-A
SIZE DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGYFax: [phone]
Milpitas, CA 95035
Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Friday, August 14, 2015
3 3
HIGH EFFICIENCY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
HZ HAORAN W.
N/A
LTC3882EUJ-1
DEMO CIRCUIT 2312A-A
R76 4.99K
0603
Q21
Si2365EDS
23
1
E25
SHARE_CLK
E27
FAULT1
R77 4.99K
0603
D5 RED
E30
RUN1
D4 OPT
C29 10nF
0603
R81 127 0603
Q20
Si2365EDS
23
1
R83
0
0603
R71 0
0603
Q23
2N7002A
2 3
1
R72 OPT
R82 OPT
D8
21
E26
SYNC
D10 RED
Q22
Si2365EDS
23
1
Q24
2N7002A
2 3
1
R92 OPT
R78 OPT
E23
SDA
R90 OPT
R74 OPT
E18
AUX3V4
R84 127 0603
D9
GREEN
R80 127 0603
R68 OPT
SW3
1
2
3
4
5
6
R93 200 0603
D6 RED
R86 10K
0603
J12 DEMO HEADER (F)
FAULTB
1
CTRL
2
ALERTB
3
SDA
4
SHARE_CLK
5
SCL
6
RESETB
7
AUXP
8
UNUSED
9
UNUSED
10
GND
11
GND
12
12V
13
12V
14
R75 OPT
D11 GREEN
E28
FAULT0
J11
AUXP 1
SDA 2
GND 3
SCL 4
LGKPWR 5
ALERTB 6
GPIO_1 7
OUTEN_0 8
OUTEN_1 9
GND 10
AUXSCL 11
AUXSDA 12
E21
GND
C44 10nF
0603
E22
ALERTB
R87 15.8k 0603
R70 10
0603
SW4
1
2
3
4
5
6
R73 0
0603
R91 OPT
J13DEMO HEADER (M)
FAULTB 1
CTRL 2
ALERTB 3
SDA 4
SHARE_CLK 5
SCL 6
RESETB 7
AUXP 8
UNUSED 9
UNUSED 10
GND 11
GND 12
12V 13
12V 14
E29
RUN0
R94 200 0603
C45
100nF
0603
E24
SCL
R69 10
0603
E31
SGND
U5
24LC025-I/ST
A0
1
A1
2
A2
3
VSS
4SDA 5
SCL 6
WP 7
VCC 8
J15
AUX3V4 4
SCL 3
GND 2
1
SDA
JP2
1
2
3
JP1
1
2
3
D7 OPT
Q19
Si2365EDS
2
3
1

19
dc2312afb
DEMO MANUAL
DC2312A-A/DC2312A-B
SCHEMATIC DIAGRAM DC2312A-B
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
7V-14V
16V16V
2. INSTALL SHUNTS AS SHOWN.
1. ALL RESISTORS ARE IN OHMS, 0402. ALL CAPACITORS ARE IN MICROFARADS, 0402.
NOTE: UNLESS OTHERWISE SPECIFIED
16V
FP1007R3-R17-R FP1007R3-R17-R
OPTIONAL FOR 2-PHASE OPERATIONADJ. UP TO 2V
MAX 35A
ADJ. UP TO 2V MAX 35A
ISNS0+
ISNS0-
PWM0
PWM1 ISNS1+ ISNS1-
VDD25
VDD25VDD33
VIN
VCC
VDD33
VDR
VDR
VDR
VDR
VDR
VDR
VDD33
VDD33
VDD25
FAULT0
FAULT1 SCL
VIN
SDA ALERTB
VSENSE0+ VSENSE0-
SCL
SDA
ALERTB FAULT0 FAULT1
RUN0
SYNC
SHARE_CLK
ASEL1
VOUT0_CFG
VOUT1_CFG
FREQ_CFG
PHAS_CFG
VIN
VOUT0
VSENSE0+
VSENSE0-
ASEL0
ASEL0
ASEL1
VOUT0_CFG VOUT1_CFG
FREQ_CFG
PHAS_CFG
SYNC
SHARE_CLK
RUN1
IAVG1
IAVG0
VSENSE0+
TSNS0
TSNS1 COMP1
COMP0
VSENSE1+
TSNS0 TSNS1
VSENSE1+
VSENSE1+
COMP0
COMP1
VFB1
IAVG1IAVG0 VSENSE1+VSENSE0+
VFB1
VFB0
VOUT1
RUN0 RUN1
FAULT1
FAULT0
RUN1
RUN0
VDD33
PGOOD0
PGOOD0 PGOOD1
PGOOD1
VSENSE1-
VSENSE1-
VSENSE1-
VSENSE0-
VOUT0 VOUT1
REVISION HISTORY
DESCRIPTIONDATE
APPROVED
ECO REV
HAORAN W.
PRODUCTION 51-72-72
__
REVISION HISTORY
DESCRIPTIONDATE
APPROVED
ECO REV
HAORAN W.
PRODUCTION 51-72-72
__
REVISION HISTORY
DESCRIPTIONDATE
APPROVED
ECO REV
HAORAN W.
PRODUCTION 51-72-72
__
SIZE DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGYFax: [phone]
Milpitas, CA 95035
Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Thursday, October 29, 2015
1 3
HIGH EFFICIENCY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
HZ HAORAN W.
N/A
LTC3882EUJ-1
DEMO CIRCUIT 2312A-B
SIZE DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGYFax: [phone]
Milpitas, CA 95035
Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Thursday, October 29, 2015
1 3
HIGH EFFICIENCY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
HZ HAORAN W.
N/A
LTC3882EUJ-1
DEMO CIRCUIT 2312A-B
SIZE DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGYFax: [phone]
Milpitas, CA 95035
Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Thursday, October 29, 2015
1 3
HIGH EFFICIENCY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
HZ HAORAN W.
N/A
LTC3882EUJ-1
DEMO CIRCUIT 2312A-B
R15
24.9K
R12 64.9K
P4
+
C16
470uF
2.5V
R1 1
R34 OPT
C7
2.2uF
R32 OPT
P2
C22 220pF
C41
22pF
L2
0.17uH
+
C19
470uF 2.5V
J2
GND
R60 1k
R33 OPT
C31
1uF
R35 OPT
R5 0
C23
100uF
1206
R62 0
C5
0.1uF
C14
100uF
1206
R101 0
E4
VDD25
R36 OPT
R100 0 0603
R99 0
C42 0.22uF
E3
VDD33
C52 0.1uF
C20 0.22uF
R67 0
+
C17
470uF 2.5V
+
C26
470uF 2.5V
R46 OPT
0603
U2
LTC3882EUJ-1
COMP0 1
TSNS0 2
TSNS1 3
VINSNS 4
IAVG_GND
5
PGOOD0
6
PWM0 7
SYNC
8
SCL
9
SDA
10
ALERT
11
FAULT0
12
FAULT1
13
RUN0
14
RUN1
15
ASEL0
16
ASEL1
17
VOUT0_CFG
18
VOUT1_CFG
19
FREQ_CFG
20
PHAS_CFG
21
VDD25 22
SHARE_CLK
23
VDD33 24
VCC 25
PWM1 26
PGOOD1
27
COMP1 28
FB1 29
IAVG1
30
ISENSE1+ 31
ISENSE1- 32
VSENSE1+ 33
VSENSE1- 34
VSENSE0- 35
VSENSE0+ 36
ISENSE0- 37
ISENSE0+ 38
IAVG0
39
FB0 40
GND
41
E1
VIN
P1
R7
2.67k
R29 OPT
R43 10k 0603
+
C4
330uF
J1
VIN
J4
GND
+
C18
470uF
2.5V
R37 OPT
+
C27
470uF 2.5V
+
C3
330uF
C35 1uF
R30 OPT
R98 0
C38
100uF
1206
R44 10k 0603
+
C28
470uF 2.5V
R27
2.67k
E19
VOUT1-
Q1
MMBT3906LT1G
R24 0
0603
R10 10k 0603
R57 1k
C9
1uF
R38 OPT
R18
OPT
GL
AGND VIN
PGND
U3 FDMF5820DC
PWM
1
ZCD#
2
VCC 3
AGND 4
BOOT 5
NC 6
PHASE 7
VIN 8
VIN 9
VIN 10 VIN 11
PGND
12
PGND
13
PGND
14
SW 16
SW 17
SW 18 SW 19
SW 20
SW
21
SW
22
SW
23
SW
24
SW
25
SW
26
GL
27
PGND
15
TMON 30
EN/FAULT#
31
AGND 32
PGND
34
GL
35
VIN 33
PGND
28
PVCC 29
C32
10nF
C39
100uF
1206
R59 1k
R16 0 0603
J8
GND
Q6
MMBT3906LT1G
R11 10k 0603
C50 OPT
GL
AGND VIN
PGND
U1 FDMF5820DC
PWM
1
ZCD#
2
VCC 3
AGND 4
BOOT 5
NC 6
PHASE 7
VIN 8
VIN 9
VIN 10
VIN 11
PGND
12
PGND
13
PGND
14
SW 16 SW 17
SW 18
SW 19
SW 20
SW
21
SW
22
SW
23
SW
24
SW
25
SW
26
GL
27
PGND
15
TMON 30
EN/FAULT#
31
AGND 32
PGND
34
GL
35
VIN 33
PGND
28
PVCC 29
E7
VOUT0+
E9
VOUT1+
R17 10k 0603
C8 1uF
C40
100uF
1206
E2
GND
C48
10nF
R20 OPT
C37
22pF
R39 OPT
R22 OPT
0603
R49 0 2512
R13 10k 0603
R25 0
C30 10pF
J9
VOUT1
C53 0.1uF
C34 22uF 1210
C10 22uF 1210
C54 OPT
R58 1k
+
C15
470uF 2.5V
J3
VOUT0
C21
470pF
C43
100uF
1206
C36 100nF
R2
24.9K
P3
R9
1.24k
R61 0 0603
R28 10k 0603
C33 22uF 1210
C6 22uF 1210
R19 10k 0603
C1 1uF
C12
100uF
1206
R40 OPT
R14 10k 0603
E8
VOUT0-
R31 OPT
R41 10k 0603 R21 10k 0603
L1
0.17uH
C55
OPT
C2 1uF
C11 100nF
C13
100uF
1206

20
dc2312afb
DEMO MANUAL
DC2312A-A/DC2312A-B
SCHEMATIC DIAGRAM DC2312A-B
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
NOTE: PULSE OUT 10mV / AMP
0805
2512
IOUT
TST
DYNAMIC LOAD CIRCUIT
DO NOT EXCEED 5% DUTY CYCLE!
0805
VOUT1
0805
VOUT0
ON
VD R
OFF
VC C
ON
OFF
LTC3607PGOOD1
LTC3607PGOOD1
VIN
VCC VDR
VOUT0 VOUT1
VOUT1VOUT0
VIN
SIZE DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGYFax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Monday, August 10, 2015
2 3
HIGH EFFICIENCY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
HZ HAORAN W.
N/A
LTC3882EUJ-1
DEMO CIRCUIT 2312A-B
SIZE DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGYFax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Monday, August 10, 2015
2 3
HIGH EFFICIENCY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
HZ HAORAN W.
N/A
LTC3882EUJ-1
DEMO CIRCUIT 2312A-B
SIZE DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGYFax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Monday, August 10, 2015
2 3
HIGH EFFICIENCY DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
HZ HAORAN W.
N/A
LTC3882EUJ-1
DEMO CIRCUIT 2312A-B
R48 0.001 2512
RPG2
100k
COUT5
0.1uF
16V 0603
RPG1
100k
C58
1uF
RSD1 5.1M
CF 0.1uF 0603
COUT7 10uF 16V 0805
E17
GND
C57
1uF
J14
1
2
3
4
5
E15
GND
JP6
1
2 3
J7
1
2
3
4
5
E12
VCC
R64 887k 1%
R63 121k 1%
J10
1
2
3
4
5
R53 OPT
CFFW1 22pF
R65 121k 1%
L3
4.7uH
IHLP1616BZER4R7M11
Vishay
JP4
1
2 3
RF 100
E10
PULSE IN
CIN1 10uF 25V 1206
E13
VDR
E11
GND
RSD2 5.1M
+
CIN3
22uF
35V 7343
COUT3 10uF 16V 0805
E14
GND
R45 0.01
Q3
RJK0305DPB
1
2
5
3
4
C47
1uF
COUT4 0.1uF 16V 0603
R42 10K 0603
L4
4.7uH
IHLP1616BZER4R7M11
Vishay CFFW2
22pF
U6
LTC3607EMSE
PGND2
7
MODE/SYNC
15
RUN211
SGND
8
PGOOD1
16
VFB2
12
SW2 6
SW1
3
SVIN 1
PGOOD2 9
PVIN1 4
PVIN2 5
PGND1
2
VFB1
13 RUN114
GND
17
SGND
10
E16
GND
R66 887k 1%