DC2291A - Demo Manual

DEMO MANUAL DC2291A
LTC3882EUJ High Efficiency
Step-Down DC/DC Converter with
Digital Power System Management
DESCRIPTION
Demonstration circuit 2291A is a high current, high efficiency, PolyPhase® synchronous buck converter featuring
the LTC®3882EUJ, a dual output voltage mode controller.
This demo board incorporates two LTC3882 controllers
which provide four phases to deliver up to 140A. The default output voltage is 1V and can be adjusted from 0.5V
to 2V. The LTC3882 has the PMBus interface and digital
power system management functions.
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.
The DC2291A 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
DC/DC converter. To fully explore the extensive power
system management features of the parts, download
GUI 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/DC2291A
L, LT, LTC, LTM, Linear Technology, the Linear logo, PolyPhase and LTpowerPlay are
registered trademarks of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
PERFORMANCE SUMMARY
SYMBOL
PARAMETER
VIN
Input Supply Range
VOUT0
Output Voltage Range
IOUT0
Output Current Range
FSW
Factory Default Switching
EFFICIENCY
Full Load Efficiency
Specifications are at TA = 25°C
CONDITIONS
IOUT0 = 0A to 140A, VIN = 7V to 14V
MIN
TYP
MAX
7
12
14
V
0.5
1.0
2.0*
V
0
VOUT0 = 1.0V, IOUT0 = 140A, See Figure 4.
UNITS
140**
A
450
kHz
88.6
%
*Note: The DC2291A 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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1
DEMO MANUAL DC2291A
QUICK START PROCEDURE
Demonstration circuit 2291A makes it easy to set up
to evaluate the performances of the LTC3882. 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 C50.
See Figure 3 for proper scope probe technique.
1.Make sure jumpers are in the following positions:
JUMPER
JP5
JP7
POSITION
ON
ON
FUNCTION
External 5V VDR for DrMOS
External 5V VCC for LTC3882
2.With power off, connect the input power supply to VIN
and GND. Connect active load to the output (through
J3 and J18 for VOUT and J4 and J19 for GND).
4.Turn on the power at the input.
Note. Make sure that the input voltage does not exceed 15V.
5.Turn on RUN switch (SW4) as desired.
6.Check for the correct output voltage from VOUT0+ to
VOUT0–.
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” session for
details.
3.Make sure RUN switch (SW4) is OFF.
2
dc2291af
DEMO MANUAL DC2291A
CONNECTING A PC TO DC2291A
You can use a PC to reconfigure the power management
features of the LTC3882 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
VIN
USB TO I2C/PMBUS
DONGLE DC1613A
12-PIN
CONNECTOR
LTC3882
DEMO BOARD
DC2291A
VOUT0
LOAD
DC2291A F01
Figure 1. Demo Setup with PC
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3
DEMO MANUAL DC2291A
QUICK START PROCEDURE
Figure 2. Power Test Setup
4
dc2291af
DEMO MANUAL DC2291A
QUICK START PROCEDURE
COMBINING DC2291A WITH OTHER DIGITAL POWER
DEMO BOARDS
n
Measure VIN across the input ceramic capacitor (C6).
Measure VOUT across the output ceramic capacitor
(C38);
The DC2291A may be plugged together in a multi-board
array with other LTC power system management boards
using J12 and J13.
n
MEASURING EFFICIENCY (SEE FIGURE 4)
MEASURING OUTPUT RIPPLE VOLTAGE
To accurately measure efficiency of any configuration, do
the following:
An accurate ripple measurement may be performed by
using the configuration across C50 as shown in Figure 3.
n
Set JP5 and JP7 on the “OFF” position;
Connect external 5V supply to VDR and VCC turrets and
measure its input current;
+
–
COUT
VOUT
GND
Figure 3. Measuring Output Voltage Ripple
100
95
90
EFFICIENCY (%)
n
Add the loss from external 5V supply into the efficiency
calculation.
85
80
75
70
65
0
20
40
60
80 100
LOAD CURRENT (A)
120
140
DC2291A F04
Figure 4. Typical Efficiency Curves of DC2291A, VIN = 12V, V0 = 1.0V, FSW = 450kHz, CCM
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5
DEMO MANUAL DC2291A
QUICK START PROCEDURE
10A/DIV
10mV/DIV
Figure 5. Load Transient Waveform of DC2291A, VIN = 12V, V0 = 1.0V, FSW = 450kHz, 0% to 25% (0A to 35A) Load Step
Figure 6. Thermal Picture of DC2291A, VIN = 12V, V0 = 1.0V, IO = 140A, FSW = 450kHz, 400LFM Airflow, TA = 25°C
6
dc2291af
DEMO MANUAL DC2291A
LTpowerPlay SOFTWARE GUI
LTpowerPlay is a powerful Windows-based development environment that supports Linear Technology’s
power system management ICs, including the LTC3880,
LTC3882, LTC3883, LTM®4676, LTC2974, LTC2978 etc.
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 LTC3882’s DC2291A demo system,
or a customer board. The software also provides an automatic update feature to keep the software current with
the latest set of device drivers and documentation. The
LTpowerPlay software can be downloaded from:
http://www.linear.com/LTpowerPlay
To access technical support documents for LTC Digital
Power Products visit Help. View online help on the
LTpowerPlay menu.
Figure 7. LTpowerPlay Main Interface
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7
DEMO MANUAL DC2291A
LTpowerPlay QUICK START PROCEDURE
The following procedure describes how to use LTpowerPlay
to monitor and change the settings of LTC3882.
1.Download and install the LTpowerPlay 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:
http://www.linear.com/LTpowerPlay
2.Launch the LTpowerPlay GUI.
a. The GUI should automatically identify the DC2291A.
The system tree on the left hand side should look
like this:
b. A green message box shows for a few seconds in the
lower left hand corner, confirming that the LTC3882
is communicating:
Then, click the “W” (PC to RAM) icon to write these
register values to the LTC3882. 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:
c. In the Toolbar, click the “R” (RAM to PC) icon to
read the RAM from the LTC3882. This reads the
configuration from the RAM of LTC3882 and loads
it into the GUI.
e. You can save the changes into the NVM. In the tool
bar, click “RAM to NVM” button:
f. Save the demo board configuration to a (*.proj)
file. Click the Save icon and save the file. Name it
whatever you want.
8
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DEMO MANUAL DC2291A
PARTS LIST
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
Required Circuit Components
1
2
CFFW1, CFFW2
CAP., 22pF, C0G, 50V, 10%, 0402
KEMET, C0402C220K5GACTU
2
1
CIN1
CAP., TANT., 22μF, X5R, 35V, 20%, 7343
AVX, TPSY226M035R0200
3
8
C6, C10, C33, C34, C66, C67, C86, C87
CAP., 22μF, X5R, 25V, 10%, 1206
MURATA, GRM31CR61E226KE15L
4
1
CIN5
CAP., 10μF, X5R, 35V, 20%, 1206
TAIYO YUDEN, GMK316BJ106ML-T
5
2
COUT9, COUT7
CAP., 47μF, X5R, 16V, 20%, 1206
TDK, C3216X5R1C476M160AB
6
4
C3, C4, C24, C46
CAP., OSCON, 330μF, 16V, 20%, F12
PANASONIC, 16SVP330M
7
2
C9, C25
CAP., 4.7μF, X5R, 6.3V, 20%, 0402
SAMSUNG, CL05A475MQ5NRNC
8
16
C12, C13, C14, C29, C38, C39, C40, C41, CAP., 100μF, X5R, 6.3V, 20%, 1206
C50, C54, C63, C64, C65, C74, C75, C91
MURATA, GRM31CR60J107ME39L
9
12
C17, C18, C19, C28, C55, C60, C69, C76, CAP., POSCAP, 470μF, 2.5V, 0.007Ω,
C81, C82, C99, C100
4400mA, D2E CASE
PANASONIC, 2R5TPE470M7
10
4
C20, C42, C58, C85
CAP., 0.22μF, X5R, 16V, 10%, 0402
TDK, C1005X5R1C224K050BB
11
1
C21
CAP., 2200pF, X7R, 50V, 10%, 0402
MURATA, GRM155R71H222KA01D
12
1
C22
CAP., 220pF, X7R, 50V, 10%, 0402
MURATA, GRM155R71H221KA01D
13
1
C30
CAP., 47pF, NP0, 25V, 10%, 0402
MURATA, GRM1555C1E470KA01D
14
4
L1, L2, L3, L4
IND., PWR., 0.17μH, 10%, 61A
COOPER BUSSMANN, FP1007R3-R17-R
15
4
R2, R3, R15, R110
RES., 24.9k, 1/16W, 1%, 0402
VISHAY, CRCW040224K9FKED
16
5
R29, R31, R37, R42, R64
RES., 24.9k, 1/10W, 1%, 0603
VISHAY,CRCW060324K9FKEA
17
9
R5, R25, R41, R45, R109, R114, R115,
R116, R117
RES., 0Ω, 1/16W, 0402
VISHAY, CRCW04020000Z0ED
18
5
R24, R51, R71, R73, R83,
RES., 0Ω, 1/10W, 0603
VISHAY, CRCW06030000Z0EA
19
4
R7, R27, R93, R111
RES., 2.67k, 1/16W, 1%, 0402
VISHAY, CRCW04022K67FKED
20
1
R9
RES., 180Ω, 1/16W, 1%, 0402
VISHAY, CRCW0402180RFKED
21
7
R10, R11, R13, R19, R20, R43, R86
RES., 10k, 1/10W, 1%, 0603
VISHAY, CRCW060310K0FKEA
22
1
R12
RES., 7.32k, 1/16W, 1%, 0402
VISHAY, CRCW04027K32FKED
23
2
R14, R17
RES., 2k, 1/10W, 1%, 0603
VISHAY, CRCW06032K00FKEA
24
9
R26, R57, R58, R59, R60, R63, R103,
R105, R107
RES., 1k, 1/16W, 1%, 0402
VISHAY, CRCW04021K00FKED
25
1
R30
RES., 4.32k, 1/10W, 1%, 0603
VISHAY, CRCW06034K32FKEA
26
3
R32, R44, R65
RES., 5.76k, 1/10W, 1%, 0603
VISHAY, CRCW06035K76FKEA
27
1
R38
RES., 9.09k, 1/10W, 1%, 0603
VISHAY, CRCW06039K09FKEA
28
4
U1, U3, U4, U6
I.C., MODULE, 60A, 31-LEAD, CLIP BOND
PQFN, SPS, 5 × 5mm
FAIRCHILD SEMI., FDMF5820DC
29
1
U2
I.C., LTC3882EUJ#PBF, QFN, 6 × 6mm
LINEAR TECH., LTC3882EUJ#10EG-1PBF-ES
30
1
U8
I.C., LTC3882EUJ#PBF, QFN, 6 × 6mm
LINEAR TECH., LTC3882EUJ#10EH-1PBF-ES
dc2291af
9
DEMO MANUAL DC2291A
PARTS LIST
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
Additional Demo Board Circuit Components
1
10
C5, C52, C53, C56, C68, C51, C11, C36,
C71, C88
CAP., 0.1μF, X7R, 16V, 10%, 0402
AVX, 0402YC104KAT2A
2
3
COUT8, COUT10, C45
CAP., 0.1μF, X7R, 16V, 10%, 0603
AVX, 0603YC104KAT2A
3
1
C59
CAP., 0.1μF, X5R, 16V, 10%, 0805
AVX,0805YD104KAT2A
4
13
C1, C2, C7, C8, C31, C35, C47, C57,
C61, C77, C89, C90, C97
CAP., 1μF, X5R, 10V, 20%, 0402
MURATA, GRM155R61A105ME15D
5
1
C49
CAP., 1μF, X5R, 16V, 10%, 0805
AVX, 0805YD105KAT2A
6
10
C5, C52, C53, C56, C68, C51, C11, C36,
C71, C88
CAP., 0.1μF, X7R, 16V, 10%, 0402
AVX, 0402YC104KAT2A
7
3
COUT8, COUT10, C45
CAP., 0.1μF, X7R, 16V, 10%, 0603
AVX, 0603YC104KAT2A
8
1
C59
CAP., 0.1μF, X5R, 16V, 10%, 0805
AVX,0805YD104KAT2A
9
13
C1, C2, C7, C8, C31, C35, C47, C57,
C61, C77, C89, C90, C97
CAP., 1μF, X5R, 10V, 20%, 0402
MURATA, GRM155R61A105ME15D
10
1
C49
CAP., 1μF, X5R, 16V, 10%, 0805
AVX, 0805YD105KAT2A
11
4
C32, C48, C73, C98
CAP., 0.01μF, X7R, 16V, 10%, 0402
AVX, 0402YC103KAT2A
12
1
C44
CAP., 0.01μF, X7R, 50V, 10%, 0603
AVX, 06035C103KAT2A
13
2
C37, C70
CAP., 56pF, NP0, 25V, 10%, 0402
KEMET, C0402C560K3GACTU
14
1
D5
LED, YELLOW GREEN, WATER CLEAR,
571nm, 0603
LITE-ON, LTST-C193KGKT-5A
15
3
D8, D9, D12
DIODE, ULTRA LOW SCHOTTKY
RECTIFIER, 20V, 0.5A, SOD-882
NXP SEMI., PMEG2005AEL,315
16
1
D10
LED, RED, WATER CLEAR, 631nm, 0603
LITE-ON, LTST-C193KRKT-5A
17
2
L5, L6
IND., PWR., SHIELDED, 4.7μH, 20%
COILCRAFT, XFL4020-472MEC
18
4
Q1, Q2, Q3, Q6
XSTR., GP, PNP, 40V, 0.2A, SC75-3,
SOT-416
ON SEMI, MMBT3906TT1G
19
1
Q4
XSTR., MOSFET, SWITCHING, PWR,
N-CH, 30V, 30A, LFPAK
RENESAS ELECTRONICS,
RJK0305DPB-00-J0
20
3
Q19, Q20, Q22
XSTR., MOSFET, P-CH, 20V, 5.9A, SOT-23,
TO-236
VISHAY, SI2365EDS-T1-GE3
21
1
Q21
XSTR., MOSFET, N-CH, 60V, 115mA,
SOT-23
DIODES INC., 2N7002-7-F
22
1
RPG1
RES., 100k, 1/16W, 1%, 0402
VISHAY, CRCW0402100KFKED
23
2
R1, R4
RES., 1Ω, 1/16W, 1%, 0402
VISHAY, CRCW04021R00FKED
24
2
R46, R49
RES., SENSE, 0.01Ω, 1W, 1%, 2512
PANASONIC, ERJM1WSF10MU
25
2
R66,R67
RES., 619k, 1/16W, 1%, 0402
VISHAY, CRCW0402619KFKED
26
2
R68, R69
RES., 84.5k, 1/16W, 1%, 0402
VISHAY, CRCW040284K5FKED
27
2
R70, R16
RES., 10Ω, 1/10W, 1%, 0603
VISHAY, CRCW060310R0FKEA
10
dc2291af
DEMO MANUAL DC2291A
PARTS LIST
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
28
2
R76, R77
RES., 4.99k, 1/10W, 1%, 0603
VISHAY, CRCW06034K99FKEA
29
1
R81
RES., 200Ω, 1/10W, 1%, 0603
VISHAY, CRCW0603200RFKEA
30
1
R84
RES., 127Ω, 1/10W, 1%, 0603
VISHAY, CRCW0603127RFKEA
31
1
R87
RES., 15.8k, 1/10W, 1%, 0603
VISHAY, CRCW060315K8FKEA
32
0
R23, R33, R34, R35, R36, R39, R40,
R47, R48, R50, R52, R53, R55, R74,
R75, R78, R82, R92, R100 (OPT)
RES., OPTION, 0603
33
0
D7 (OPT)
DIODE, OPTION, SOD-323
34
1
SW4
SWITCH, SUB-MINIATURE SLIDE, DPDT,
6VDC, 0.3A, THRU-HOLE
35
1
U5
I.C., EEPROM SERIAL-I2C, 2K-BIT, TSSOP-8 MICROCHIP, 24LC025-I/ST
36
1
U7
I.C., DUAL 1A, 17V, 5μA 1MHz SYNCH
BUCK CONVERTER FOR THE 3622 AND
DUAL 1A, 17V, 5μA 2.25MHz SYNCH BUCK
CONVERTER
37
0
C23, C43, C72, C92, C93, C94, C95, C96
CAP., OPTIONAL 1206
38
0
C15, C16, C26, C27, C79, C80, C83, C84
CAP., OPTIONAL D2E CASE
C&K COMPONENTS, JS202011CQN
LINEAR TECH., LTC3622EDE#PBF
Hardware for Demo Board Only
1
26
E1-E26
TEST POINT, TURRET, .094" MTG. HOLE
MILL-MAX, 2501-2-00-80-00-00-07-0
2
2
JP5, JP7
CONN., HEADER, 1 × 3, 2mm
WURTH ELEKTRONIK 62000311121
3
2
JP5, JP7
SHUNT, 2mm
SAMTEC, 2SN-BK-G
4
6
J1, J2, J3, J4, J18, J19
STUD, FASTENER, #10-32
PENN ENGINEERING, KFH-032-10
5
12
J1, J2, J3, J4, J18, J19 (×2 )
NUT, BRASS 10-32
ANY #10-32M/S BR PL
6
6
J1, J2, J3, J4, J18, J19
RING, LUG, CRIMP, #10
KEYSTONE, 8205
7
6
J1, J2, J3, J4, J18, J19
WASHER, TIN PLATED BRASS
ANY #10 EXT BZ TN
8
1
J11
CONN., HEADER, 2 × 6, 2mm, STR DL,
THRU-HOLE
FCI, 98414-G06-12ULF
9
1
J12
CONN., HEADER, 2 × 7, 2mm, R/A (F)
SULLINS CONNECTOR SOLUTIONS,
NPPN072FJFN-RC
10
1
J13
CONN., HEADER, 2 × 7, 2mm, R/A (M)
MOLEX, 87760-1416
11
2
J15, J16
CONN., BNC PC MOUNT RECEPT. JACK,
50Ω, TF-4 POST
CONNEX, 112404
12
1
J17
CONN., HEADER, SHROUDED, 4POS, 2mm, HIROSE, DF3A-4P-2DSA
R/A THRU-HOLE
13
4
MT1, MT2, MT3, MT4
STANDOFF, NYLON, SNAP-ON, 0.500"
KEYSTONE, 8833
dc2291af
11
A
B
C
D
VIN
E4
E3
E2
J2
VDD25_1
VDD33_1
VDD25_1
VDD33_1
GND
GND
7V-14V
J1
0603
R17 2k
1K
R26
WP
RUN0
GPIO0B
SHARE_CLK
SYNC
ALERTB
SDA
SCL
C3
330uF
16V
R39 OPT
0603
R37 24.9k
R35 OPT
R33 OPT
0603
R31 24.9k
0603
R29 24.9k
R40 OPT
5
0603
PHAS_CFG_1
R38 9.09k
FREQ_CFG_1
R36 OPT
VOUT1_CFG_1
R34 OPT
0603
VOUT0_CFG_1
R32 5.76k
0603
ASEL1_1
R30 4.32k
ASEL0_1
Address: 0x43
R23 OPT
R20 10k 0603
R19 10k 0603
0603
R14 2k
R13 10k 0603
R11 10k 0603
R10 10k 0603
VDD25_1
VDD33_1
+
VIN
+
IAVG0_GND
IAVG0
C4
330uF
16V
R1
ASEL1_1
ASEL0_1
WP
SYNC
SHARE_CLK
RUN0
GPIO0B
ALERTB
SDA
SCL
C5
0.1uF
6.3V
C37
56pF
PHAS_CFG_1
FREQ_CFG_1
VOUT1_CFG_1
VOUT0_CFG_1
1
VDD33_1
9
31
39
21
20
19
18
17
16
23
8
24
15
14
13
12
11
10
PHAS_CFG
FREQ_CFG
VOUT1_CFG
IAVG1
IAVG0
U2
LTC3882EUJ
VOUT0_CFG
ASEL1
ASEL0
WP
SYNC
C8
1uF
VDD25_1
SHARE_CLK
RUN1
RUN0
GPIO1
GPIO0
ALERT
SDA
SCL
C7
1uF
VDD33_1
4
VIN
R41
0
4
4
VCC
26
E1
25
VDD33
22
VDD25
IAVG_GND
5
BG1/EN1
TG1/PWM1
ISENSE1+
ISENSE1-
VSENSE1+
FB1
COMP1
TSNS1
TSNS0
COMP0
FB0
VSENSE0-
VSENSE0+
ISENSE0-
ISENSE0+
BG0/EN0
TG0/PWM0
TG1_1
27
28
ISNS1+_1
P10
ISNS1-_1
32
VDR
C35
1uF
R58 1k
1
28
15
34
35
27
2
31
1
28
15
34
35
27
2
R2
24.9K
GL
R15
24.9K
PGND
PGND
PGND
GL
GL
ZCD#
32
GL
1uF
29
U1
AGND
1uF
3
1. ALL RESISTORS ARE IN OHMS, 0402.
ALL CAPACITORS ARE IN MICROFARADS, 0402.
2. INSTALL SHUNTS AS SHOWN.
VIN
PGND
VIN
U3 FDMF5820DC
AGND
VDR
FDMF5820DC
PGND
C31
VSENSE0+_1
EN/FAULT#
PWM
C52
0.1uF
PGND
PGND
PGND
GL
GL
ZCD#
EN/FAULT#
PWM
C53
0.1uF
31
180
R9
R57 1k
VDR
2200pF
C21
VFB0_1
R60 1k
R59 1k
C2
1uF
C1
4
NOTE: UNLESS OTHERWISE SPECIFIED
P4
P3
VDD33_1
VSENSE0+_1
COMP0_1
TSNS1_1
VDR
C22 220pF
47pF
TSNS0_1
C30
COMP0_1
R12 7.32k
VSENSE0-_1
33
34
30
29
3
2
1
40
35
P9
VSENSE0+_1
ISNS0-_1
36
ISNS0+_1
38
TG0_1
37
6
7
C9
4.7uF
P2
P1
VDR
3
VCC
VCC
30
TMON
PGND
13
30
TMON
VINSNS
GND
41
3
VCC
PGND
14
3
12
32
PGND
12
PGND
14
24
AGND
SW
PVCC
SW
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
1.5k
0.22uF
0.17uH
FP1007R3-R17-R
100nF
C34
22uF
1206
C33
22uF
1206
VIN
C32
10nF
C48
10nF
TSNS1_1
0.22uF
C20
R7
1.5k
VIN
TSNS0_1
C10
22uF
1206
0.17uH
FP1007R3-R17-R
100nF
0
R25 0
C11
R5
C6
22uF
1206
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
13
SW
AGND
PGND
AGND
25
29
PVCC
26
4
AGND
6
NC
SW
23
6
NC
SW
23
SW
26
8
VIN
SW
22
VIN
SW
21
9
VIN
SW
8
VIN
SW
22
12
21
5
C13
100uF
1206
C39
100uF
1206
C14
C29
C41
100uF
1206
C50
C54
SCALE = NONE
C26
OPT
C28
470uF
+
C18
470uF
C60
470uF
+
C55
470uF
+
E6
E5
GND
GND
VOUT0
VOUT0
VOUT0-
VOUT0+
J19
J4
J3
J18
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
C27
OPT
+
0603
R24 0
0603
R16 0
C17
470uF
+
DATE
HAORAN W. 12-2-15
APPROVED
DATE:
N/A
SIZE
1
DEMO CIRCUIT 2291A
LTC3882EUJ
Wednesday, December 02, 2015
IC NO.
SHEET 1
2
OF 4
REV.
HIGH EFFICIENCY HIGH DENSITY POLY-PHASE DC/DC STEP DOWN CONVERTER
WITH POWER SYSTEM MANAGEMENT
HAORAN W. TITLE: SCHEMATIC
+
C19
470uF
C16
OPT
C15
OPT
+
+
+
+
PRODUCTION
VOUT0
1
DESCRIPTION
REVISION HISTORY
TECHNOLOGY
100uF
1206
HZ
100uF
1206
VOUT0
VSENSE0-_1
VSENSE0+_1
100uF
1206
PCB DES.
100uF
1206
C40
100uF
1206
2
REV
APP ENG.
APPROVALS
C38
100uF
1206
C43
MMBT3906LT1G
OPT
1206
Q6
C12
100uF
1206
C23
MMBT3906LT1G
OPT
1206
Q1
__
ECO
A
B
C
D
DEMO MANUAL DC2291A
SCHEMATIC DIAGRAM
dc2291af
A
B
C
D
VDD25_2
VDD33_2
C46
330uF
16V
R52 OPT
R50 OPT
R47 OPT
R55 OPT
0603
R64 24.9k
0603
R42 24.9k
+
R53
5
OPT
PHAS_CFG_2
R51 0
FREQ_CFG_2
R48 OPT
SDA
SCL
ASEL1_2
ASEL0_2
R117 0
R116 0
R115 0
ALERTB
R114 0
1
IAVG0_GND
IAVG0
PHAS_CFG_2
FREQ_CFG_2
VOUT1_CFG_2
VOUT0_CFG_2
WP
SYNC
SHARE_CLK
VOUT1_CFG_2
R100OPT
R4
RUN0
GPIO0B
C24
330uF
16V
0603
VOUT0_CFG_2
R65 5.76k
0603
ASEL1_2
R44 5.76k
ASEL0_2
Address: 0x44
E8
VDD25_2
VDD25_2
VDD33_2
E7
+
VIN
C70
56pF
C51
4.7uF
6.3V
VDD33_2
31
39
21
20
19
18
17
16
23
8
24
15
14
13
12
11
10
9
PHAS_CFG
FREQ_CFG
VOUT1_CFG
IAVG1
IAVG0
U8
LTC3882EUJ
VOUT0_CFG
ASEL1
ASEL0
WP
SYNC
C57
1uF
VDD25_2
SHARE_CLK
RUN1
RUN0
GPIO1
GPIO0
ALERT
SDA
SCL
C47
1uF
VDD33_2
4
4
4
VCC
BG1/EN1
TG1/PWM1
ISENSE1+
ISENSE1-
VSENSE1+
FB1
COMP1
TSNS1
TSNS0
COMP0
FB0
VSENSE0-
VSENSE0+
ISENSE0-
ISENSE0+
BG0/EN0
TG0/PWM0
1
28
27
32
33
34
30
29
3
2
1
40
35
36
P12
VSENSE0+_1
TSNS1_2
TSNS0_2
COMP0_1
VSENSE0-_1
P8
VDR
R107
R105
VDR
1k
1k
28
15
34
35
27
2
31
1
28
34
35
27
2
31
37
P7
1k
R103
C90
1uF
1k
R63
VDD33_2
VDR
R3
24.9K
GL
R110
24.9K
PGND
PGND
PGND
GL
GL
ZCD#
3
GL
EN/FAULT#
PWM
C68
0.1uF
PGND
PGND
PGND
GL
GL
ZCD#
EN/FAULT#
PWM
C56
0.1uF
15
VSENSE0+_1
P11
P6
C97
1uF
38
6
7
C25
4.7uF
P5
VDR
3
1uF
4
U4
AGND
1uF
C89
PGND
VIN
U6 FDMF5820A
AGND
VIN
FDMF5820A
PGND
VDR
8
C77
29
VIN
25
VDD33
26
VCC
22
VDD25
IAVG_GND
5
PGND
13
30
TMON
VINSNS
GND
41
30
TMON
3
VCC
PGND
14
3
VCC
PGND
14
PGND
12
SW
26
SW
25
PGND
13
32
AGND
PGND
12
32
AGND
SW
24
AGND
SW
PVCC
SW
25
29
PVCC
26
4
AGND
VDR
23
6
9
20
19
18
17
16
7
5
33
11
10
20
19
18
17
16
7
5
33
11
10
C88
L4
C85
R111
1.5k
0.22uF
0.17uH
FP1007R3-R17-R
100nF
C86
22uF
1206
C87
22uF
1206
TSNS1_2
0.22uF
C58
R93
1.5k
R109 0
L3
VIN
C73
10nF
VIN
C98
10nF
TSNS0_2
0.17uH
FP1007R3-R17-R
100nF
R45 0
C71
C66
22uF
1206
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
C67
22uF
1206
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.
23
SW
24
VIN
SW
6
NC
SW
VIN
SW
21
9
VIN
22
NC
SW
8
VIN
SW
22
SW
21
5
C64
100uF
1206
C63
100uF
1206
OPT
1206
C92
100uF
1206
C91
C95
OPT
1206
C94
OPT
1206
MMBT3906LT1G
C74
100uF
1206
C72
OPT
1206
MMBT3906LT1G
C75
SCALE = NONE
HAORAN W. TITLE: SCHEMATIC
C82
470uF
TECHNOLOGY
+
C84
OPT
C99
470uF
+
C100
470uF
+
C80
OPT
+
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
+
C79
OPT
+
C83
OPT
+
C76
470uF
C69
470uF
C81
470uF
+
+
+
VOUT0
DATE:
N/A
SIZE
1
DEMO CIRCUIT 2291A
LTC3882EUJ
Monday, November 30, 2015
IC NO.
SHEET 2
2
OF 4
REV.
HIGH EFFICIENCY HIGH DENSITY POLY-PHASE DC/DC STEP DOWN CONVERTER
WITH POWER SYSTEM MANAGEMENT
HZ
PCB DES.
OPT
1206
C93
OPT
1206
C96
100uF
1206
C65
100uF
1206
APP ENG.
APPROVALS
Q2
Q3
1
A
B
C
D
DEMO MANUAL DC2291A
13
dc2291af
A
B
C
GND
E22
GND
E21
5
VIN
CIN1
22uF
35V
7343
VIN
+
C61
1uF
INTVCC
3
JP5
OFF
1
3
2
VDR
JP7
2
1
ON
OFF
CIN5
10uF
VCC
25V
1206
ON
11
6
4
3
9
7
13
1
INTVCC
ILIM
PHASE
4
FB2
SW2
PGOOD2
FB1
SW1
PGOOD1
MODE/SYNC
RUN2
VIN2
RUN1
VIN1
LTC3622EDE
GND
15
D
U7
4
10
8
5
12
14
2
D12
2
R67
619k
1%
L6 4.7uH
1
R66
619k
1%
L5 4.7uH
RPG1
100k
1%
INTVCC
R68
84.5K
1%
CFFW2
22pF
RUN0
R69
84.5K
1%
CFFW1
22pF
COUT9
47uF
1206
COUT7
47uF
1206
VCC
3
COUT10
0.1uF
16V
0603
VDR
COUT8
0.1uF
16V
0603
3
E26
CUSTOMER NOTICE
E23
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
E24
2
C59
0.1uF
0805
1
J16
SCALE = NONE
0.01
TECHNOLOGY
2512
R49
J15
IOUT
TST
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
NOTE:
PULSE OUT
10mV / AMP
C49
1uF
0805
1
VOUT0
1
DATE:
N/A
SIZE
1
DEMO CIRCUIT 2291A
LTC3882EUJ
Monday, November 30, 2015
IC NO.
SHEET 3
2
OF 4
REV.
HIGH EFFICIENCY HIGH DENSITY POLY-PHASE DC/DC STEP DOWN CONVERTER
WITH POWER SYSTEM MANAGEMENT
HAORAN W. TITLE: SCHEMATIC
APP ENG.
R46
0.01
2512
HZ
VOUT0
R43
10K
0603
4
PCB DES.
APPROVALS
VOUT0
GND
DO NOT EXCEED 5% DUTY CYCLE!
PULSE IN
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.
GND
Max. 500mA
VDR
GND
Max. 500mA
VCC
E25
E11
E9
Q4
RJK0305DPB
DYNAMIC LOAD CIRCUIT
2
2
3
4
5
5
1
2
3
14
2
3
4
5
5
A
B
C
D
DEMO MANUAL DC2291A
dc2291af
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
5
GND
E12
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
J17
100nF
C45 0603
3V3
5
6
7
GPIO0B
EESDA
EESCL
EEWP
8 AUXVCC
1
2
3
4
5
6
7
8
9
10
11
12
4
3
2
1
VDD33_2
1
1
1
D9
D8
D5
3V3
R76
4.99K
0603
2
2
E10
4
2N7002A
Q21
GREEN
GPIO0
R81
200
0603
R77
4.99K
0603
AUX3V4
4
3
2
ALERTB
OPT
OPT
R74
R75
ALERTB
SCL
E14
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
SDA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
3V3
D10
SCL
R84
127
0603
ALERTB
RED
SI2365EDS
Q20
J13DEMO HEADER (M)
SDA
E13
ALERTB
E15
SYNC
VIN
3V3
VIN
SHARE_CLK
3
0603
R87
15.8k
0603
Q22
SI2365EDS
R86 10K
3
3
R92
OPT
Q19
SI2365EDS
3V3
2
2
VDD33_2
VDD33_1
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
J12 DEMO HEADER (F)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
0603
R71 0
0603
R73 0
D7
OPT
OFF
5
ON
SW4
RUN0
2
C44
10nF
0603
R70
10
0603
GPIO0B
SGND
RUN0
RUN0
E19
GPIO0B
E20
E18
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
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.
SCALE = NONE
HAORAN W. TITLE: SCHEMATIC
APP ENG.
TECHNOLOGY
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
1
DATE:
N/A
SIZE
1
DEMO CIRCUIT 2291A
LTC3882EUJ
Monday, November 30, 2015
IC NO.
SHEET 4
2
OF 4
REV.
HIGH EFFICIENCY HIGH DENSITY POLY-PHASE DC/DC STEP DOWN CONVERTER
WITH POWER SYSTEM MANAGEMENT
HZ
PCB DES.
APPROVALS
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
R78
OPT
R83
0
0603
R82
OPT
1206
E17
SYNC
E16
SHARE_CLK
ALL PARTS ON THIS PAGE ARE FOR DEMO BOARD ONLY, NOT NEEDED IN CUSTOMER DESIGN
2
3
VDD33_1
3
2
1
1
4
1
6
3
D
5
A
B
C
D
DEMO MANUAL DC2291A
dc2291af
15
DEMO MANUAL DC2291A
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
16 Linear Technology Corporation
dc2291af
LT 0416 • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2016
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