DC1936A - Demo Manual

DEMO MANUAL DC1936A
LTC3882EUJ
Dual Output Step-Down DC/DC Controller
with Power System Management
DESCRIPTION
Demonstration circuit 1936A is a high current, high efficiency, polyphase synchronous buck converter featuring
the LTC3882EUJ, a dual output polyphase voltage mode
controller. The LTC3882 has the PMBus interface and
power system management functions.
The DC1936A uses 6mm × 6mm DrMOS as the power
stage. The input range of this board is from 7V to 14V,
and the output voltage can be programmed from 0.8V to
1.8V. The DC1936A provides two outputs, with each output
capable of 1V/30A. The DC1936A has optional discrete
driver (LTC4449EDCB) and MOSFET footprints for high
input voltage applications up to 38V. The DC1936A also
has an on-board dynamic load circuit, which makes it easy
for the customer to evaluate the transient performances.
The DC1936A powers up to default settings and produces power based on configuration resistors or with its
non-volatile 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
PERFORMANCE SUMMARY
SYMBOL
PARAMETER
VIN
Input Supply Range
VOUT0,1
Output Voltage Range
IOUT0,1
Output Current Range
fSW
Factory Default Switching
EFF
Peak Efficiency
management features of the parts, download the GUI
software LTpowerPlay™ onto your PC and use LTC’s I2C/
SMBus/PMBus Dongle DC1613A to connect to the board.
LTpowerPlay allows the user to reconfigure the part on the
fly and store the configuration settings within its onboard
EEPROM, along with viewing telemetry parameters that
include voltage, current, temperature and fault status.
GUI Download
The software can be downloaded from:
http://www.linear.com/ltpowerplay
For more details and instructions of LTpowerPlay, please
refer to LTpowerPlay for LTC3880 Quick Start Guide. The
LTC3882 operation in LTpowerPlay is similar to that of
the LTC3880.
Design files for this circuit board are available at
http://www.linear.com/demo/DC1936A
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
IOUT = 0A TO 30A, VIN = 7V to 14V
MIN
TYP
MAX
7
12
14
V
0.8
1
1.8*
V
0
30
500
VIN = 12V, VOUT0 = 1V, See Figure 4
LOAD TRANSIENT Output Voltage Peak-to-Peak Spike During VIN = 12V, VOUT0 = 1V, ISTEP = 0A – 7.5A
Load Transient
UNITS
A
kHz
90.4
%
30
mV
*Note: The DC1936A uses 4V-rated low ESR PosCAP (Part No. 4TPF470ML) as output capacitors for optimized load transient performance. If >3.6V VOUT
is needed, 6.3V-rated output capacitors should be used.
dc1936afa
1
DEMO MANUAL DC1936A
QUICK START PROCEDURE
Demonstration circuit 1936A 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:
5.Turn on RUN switch as desired.
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 C10/C45. See
Figure 3 for proper scope probe technique.
NOTE: If there is no output, temporarily disconnect the
load to make sure that the load is not set too high.
1.Make sure jumpers are in the following positions:
JUMPER
POSITION
FUNCTION
JP1
C
GPIO0B to GPIO1B
6.Check for the correct output voltage from E6 to E7 for
CH0 and from E8 to E9 for CH1. VOUT = 1V ± 0.5%
(0.995V ~ 1.005V)
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.
JP2
NC
RUN0 to RUN1
JP3
ON
5V Bias for DrMOS
JP4
ON
Bias Supply for VCC of the LTC3882
Connecting a PC to DC1936A
JP5
OFF
Write Protection
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.
2.With power off, connect the input power supply to VIN
and GND. Connect active load to the output.
3.Make sure RUN switch (SW3 and SW4) is OFF.
4.Turn on the power at the input.
NOTE. Make sure that the input voltage does not
exceed 16V.
Figure 1. Demo Setup with PC
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2
DEMO MANUAL DC1936A
QUICK START PROCEDURE
Measuring Efficiency for DC1936A (See Figure 2)
To accurately measure efficiency of any configuration, do
the following:
n
Set JP3 and JP4 to OFF position to disable the auxiliary
circuits.
n
Measure VIN across the input ceramic capacitor (C6 for
CH1, C39 for CH0). Measure VOUT across the output
ceramic capacitor (C45 for CH1, C10 for CH0).
n
The efficiency is calculated as:
Efficiency =
VOUT •IOUT
•100%
VIN •IIN + VDR •IDR + VCC •ICC
n
Turn on one channel only.
n
Apply external 5V from E21 to E22 as the driver supply
for DrMOS.
Measuring Output Ripple Voltage
n
Apply external 5V from E5 to E29 as VCC for LTC3882.
An accurate ripple measurement may be performed by
using the configuration across C10 as shown in Figure 3.
Figure 2. Power Test Setup for DC1936A
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3
DEMO MANUAL DC1936A
QUICK START PROCEDURE
+
–
COUT
VOUT
GND
Figure 3. Measuring Output Voltage Ripple
92
91
90
EFFICIENCY (%)
89
88
87
86
85
84
83
12VIN, 1VOUT, 500kHz
12VIN, 1.2VOUT, 500kHz
12VIN, 0.9VOUT, 500kHz
12VIN, 0.8VOUT, 500kHz
82
81
80
0
5
10
20
15
25
LOAD CURRENT (A)
30
35
dc1936a F04
Figure 4. Typical Efficiency Curves of DC1936A, VIN = 12V, fSW = 500kHz, Single Phase
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DEMO MANUAL DC1936A
QUICK START PROCEDURE
Figure 5. Load Transient Waveform of DC1936A, VIN = 12V, VOUT0 = 1V, fSW = 500kHz, 0% to 25% Load Step
Figure 6. Thermal Picture of DC1936A, VIN = 12V, VOUT0 = VOUT1 = 1V, IOUT0 = IOUT1 = 30A, fSW = 500kHz, No Airflow, TA = 25°C
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5
DEMO MANUAL DC1936A
LTpowerPlay SOFTWARE GUI
LTpowerPlay is a powerful Windows based development
environment that supports Linear Technology power system management ICs, including the LTC3880, LTC3883,
LTC3882, LTC2974 and 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 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
DC1936A 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://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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6
DEMO MANUAL DC1936A
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 1.5V. In the Config tab, type in 1.5 in the
VOUT_COMMAND box, like this:
http://linear.com/ltpowerplay
2. Launch the LTpowerPlay GUI.
a. The GUI should automatically identify the DC1936A.
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:
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.
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 1.5V.
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DEMO MANUAL DC1936A
LTpowerPlay QUICK START PROCEDURE
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. Name it whatever
you want.
PARTS LIST
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
CAP., X5R 22µF 25V 10% 1210
AVX, 12103D226KAT2A
Required Circuit Components
1
4
C6, C7, C39, C40
2
5
C1, C3, C17, C33, C37
CAP., X7R 1µF 16V 10% 0603
AVX, 0603YC105KAT2A
3
2
C25, C32
CAP., X7R 3.3nF 25V 10% 0603
AVX, 06033C332KAT2A
4
2
C26, C31
CAP., X7R 330pF 16V 0603
AVX, 0603YC331KAT2A
5
1
C59
CAP., X7R 1µF 16V 10% 1206
AVX, 1206YC105KAT2A
6
3
C2, C16, C34
CAP., X5R 2.2µF 16V 10% 0603
TDK, C1608X5R1C225K
7
2
C27, C30
CAP., NPO 33pF 50V 5% 0603
AVX, 06035A330JAT2A
8
2
C4, C5
CAP., OS-CON, 330µF, 16V, 20%, F12
PANASONIC, 16SVP330M
9
3
C8, C54, C67
CAP., X7R 0.1µF 50V 10% 0603
AVX, 06035C104KAT2A
10
8
C9-C12, C45-C48
CAP., X5R 100µF 6.3V 1210
AVX, 12106D107MAT2A
11
6
C14, C15, C23, C41, C49, C50
CAP., POSCAP, 470µF, 4V, D3L SIZE
PANASONIC, 4TPF470ML
12
1
C18
CAP., X5R 4.7µF 25V 0805
TAIYO YUDEN, TMK212ABJ475KG-T
13
2
C24, C66
CAP., X7R 0.22µF 25V 10% 0603
TDK, C1608X7R1E224K
14
2
C61, C62
CAP., X7R 2.2µF 6.3V 10% 0805
MURATA, GRM21BR70J225KA01L
15
6
C28, C29, C38, C51, C64, C65
CAP., X7R 0.01µF 50V 10% 0603
AVX, 06035C103KAT2A
16
2
L1, L2
INDUCTOR, SMT POWER IND. 0.22µH
PULSE, PA0515.221NLT
17
2
Q1, Q2
TRANS GP SS PNP 40V SOT-23
ON SEMI., MMBT3906LT1G
18
13
R1, R21, R26-R28, R43, R44, R48,
R49, R64, R68, R105, R45
RES., CHIP 0Ω, 0603
VISHAY, CRCW06030000Z0EA
19
4
R3, R51, R69, R104
RES., CHIP, 10Ω, 5%, 0603
VISHAY, CRCW060310R0JKEA
20
1
R31
RES., CHIP, 17.4k, 1%, 0603
VISHAY, CRCW060317K4FKEA
21
1
R32
RES., CHIP, 16.2k, 1%, 0603
VISHAY, CRCW060316K2FKEA
22
2
R29, R36
RES., CHIP, 357Ω, 1%, 0603
VISHAY, CRCW0603357RFKEA
23
2
R5, R54
RES., CHIP, 1Ω, 1%, 0603
NIC, NRC06F1R00TRF
24
2
R30, R33, R6, R13-R18, R56, R61,
R72, R73, R86, R87, R88, R89
RES., CHIP, 10k, 5%, 0603
VISHAY, CRCW060310K0JKEA
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DEMO MANUAL DC1936A
PARTS LIST
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
25
26
2
U1, U3
IC, HIGH FREQUENCY DrMOS MOUDLE
FAIRCHILD, FDMF6820A
1
U2
IC, LTC3882EUJ, QFN 6mm x 6mm
LINEAR TECH., LTC3882EUJ#10BJ-2PBF-ES
27
1
U4
IC, 24LC025-I/ST, SOIC
MICROCHIP, 24LC025-I/ST
AVX, 12103D226KAT2A
Additional Demo Board Circuit Components
1
0
CIN1, CIN2, CIN3, CIN4 OPT
CAP., X5R 22µF 25V 10% 1210
2
2
C35, C36 OPT
CAP., X7R 47pF 5% 50V 0603 OPT
3
2
C60, C63
CAP., X5R 10µF 35V 1206
4
0
C55, C56, C57, C58, C19, C20, C21,
C42, C43, C44 OPT
CAP., 0603
5
0
D1, D2 OPT
DIODE, SCHOTTKY, SOD-323
TAIYO YUDEN, GMK316BJ106ML-T
6
1
D6
DIODE, SCHOTTKY, SOD-323
CENTRAL SEMI., CMDSH-3TR
7
2
D3, D4
LED, 0603 GREEN
WURTH ELEKTRONIK, 150060GS75000
8
1
D5
LED, 0603 RED
WURTH ELEKTRONIK, 150060SS75000
9
0
D7, D8
DIODE, SOD-323
10
2
Q11, Q12
MOSFET SPEED SRS 30V 30A LFPAK
RENESAS, RJK0305DPB-00#J0
11
0
Q3, Q4, Q5, Q6 OPT
MOSFET SPEED SRS 30V 30A LFPAK
RENESAS, RJK0305DPB-00#J0
12
0
Q7, Q8, Q9, Q10 OPT
MOSFET JET SERIES 30V 45A LFPAK
RENESAS, RJK0330DPB-00#J0
13
2
Q13, Q14
MOSFET P-CH 20V 0.58A SOT-23
VISHAY, TP0101K-T1-E3
14
2
Q15, Q16
MOSFET N-CH 60V 115MA SOT-23
FAIRCHILD, 2N7002
15
2
SW1, SW2
CONNECTOR, SUB MINIATURE SLIDE SWITCHES C&K., JS202011CQN
16
0
R34, R35, R37-R42, R82-R85, R101, RES., CHIP, 0603
R102, R46, R47, R58, R59, R60, R66,
R71, R98, R65, R70, R76, R77, R67,
R103, R107 OPT
17
2
R8, R55
RES., CHIP, 1.21k, 1%, 0603
VISHAY, CRCW06031K21FKEA
18
2
R12, R63
RES., CHIP, 30Ω, 1%, 2512
VISHAY, CRCW251230R0FKEG
19
1
R62
RES., CHIP, 15.8k, 1%, 0603
VISHAY, CRCW060315K8FKEA
20
4
R79, R80, R19, R20
RES., CHIP, 4.99k, 1%, 0603
NIC, NRC06F4991TRF
21
2
R90, R91
RES., CHIP, 6.19k, 1%, 0603
VISHAY, CRCW06036K19FKEA
22
2
R92, R93
RES., CHIP, 0.01Ω, 1%, 2010
VISHAY WSL2010R0100FEA
23
4
R94, R95, R4, R52
RES., CHIP, 2k, 1%, 0603
VISHAY, CRCW06032K00FKEA
24
2
R96, R97
RES., CHIP, 200Ω, 1%, 0603
VISHAY, CRCW0603200RFKEA
25
2
R57, R99
RES., CHIP, 50Ω, 1%, 0603
VISHAY, CRCW060350R0FKEA
26
1
R100
RES., CHIP, 127Ω, 1%, 0603
VISHAY, CRCW0603127RFKEA
27
0
U5, U6 OPT
N-CHANNEL MOSFET DRIVER, LTC4449IDCB
28
1
U7
IC, LT3029IMSE, MSOP, 16 PIN
LINEAR TECH., LT3029IMSE#PBF
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DEMO MANUAL DC1936A
PARTS LIST
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
Hardware: For Demo Board Only
1
29
E1-E29
TESTPOINT, TURRET, 0.094"
MILL-MAX, 2501-2-00-80-00-00-07-0
2
2
J1, J2
JACK, BANANA
KEYSTONE, 575-4
3
4
J3-J6
STUD, TEST PIN
PEM KFH-032-10
4
8
J3-J6 (X2)
NUT, BRASS 10-32
ANY #10-32
5
4
J3-J6
RING, LUG #10
KEYSTONE, 8205, #10
6
4
J3-J6
WASHER, TIN PLATED BRASS
ANY #10
7
1
J14
CONN RECEPT 2MM DUAL R/A 14POS (F)
SULLINS, NPPN072FJFN-RC
8
1
J15
HEADER 14POS 2MM R/A GOLD (M)
MOLEX, 87760-1416
9
1
J10
CONN HEADER 12POS 2MM STR DL PCB
FCI 98414-G06-12ULF
10
5
JP1-JP5
0.079 SINGLE ROW HEADER, 3 PIN
SULLIN, NRPN031PAEN-RC
11
5
JP1-JP5
SHUNT
SAMTEC, 2SN-BK-G
12
2
J11, J12
CONN, BNC, 5 PINS
CONNEX, 112404
13
2
SW1, SW2
CONNECTOR, SUB MINIATURE SLIDE SWITCHES C&K., JS202011CQN
dc1936afa
10
A
B
C
D
OFF
WP ON
JP5
SDA
SCL
RUN1
RUN0
GPIO1B
GPIO0B
ALERTB
E2
J2
J1
VDD25
2
SYNC
SHARE_CLK
GND
GND
VIN
7V - 14V
E1
OPT
OPT
OPT
OPT
OPT
R34
R37
R39
R41
R46
5
16.2k
R32
R13
10K
R47
R42
R40
R38
R35
R31
R14
10K
C4
+
330uF
16V
SVP
VIN
OPT
OPT
OPT
OPT
OPT
17.4k
R15
10K
R17
10K
VIN
R18
10K
IAVG_GND
R5 1
IAVG1
IAVG0
PHAS_CFG
FREQ_CFG
VOUT1_CFG
VOUT0_CFG
ASEL1
ASEL0
WP
SYNC
U2
R54
1
LTC3882EUJ
SHARE_CLK
RUN1
RUN0
GPIO1
GPIO0
ALERT
SDA
SCL
1uF
C17
VDD25
E4
VDD25
C8
100nF
IAVG0
VFB1
VCOMP1
0
0
0
0
R58
R59
R60
R98
VDD33
E5
BG0/EN0
28
27
32
33
34
30
29
3
2
1
40
35
36
37
38
6
7
C18
4.7uF
4
R21
0
20
19
18
17
16
15
14
13
12
11
U3
SW1
C32
3.3nF R36
C28
10nF
PGND
PGND
PGND
PGND
PGND
VSWH
VIN
VIN
VIN
VIN
C1
1uF
Q1
C33
1uF
357
357
PAD1
R1
C2
2.2uF
16V
0
3
R3
10
PWM
R4
2k
PAD4
R49
C29
10nF
0
C34
2.2uF
16V
Q2
VSWH
VSWH
VSWH
VSWH
VSWH
GL
CGND
NC
DISB#
PWM
R52
2k
C37
1uF
R51
10
5V_BIAS
SGND AND PGND
CONNECTED AT
A SINGLE NODE
NEAR U2
PLACE Q1,Q2 NEAR L1,L2. RESPECTIVELY
VSWH
VSWH
VSWH
VSWH
VSWH
GL
CGND
NC
DISB#
1uF
C3
5V_BIAS
2. INSTALL SHUNTS AS SHOWN.
3
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
NOTE: UNLESS OTHERWISE SPECIFIED
20
19
18
17
16
15
14
13
12
11
PAD7
TG1_PWM1
330pF
330pF
PGND
PGND
PGND
PGND
PGND
VSWH
VIN
VIN
VIN
VIN
C25 3.3nF R29
PAD8
TG0_PWM0
FDMF6820A
C40
22uF
1210
VIN
0
R44
VFB1
R48
C39
22uF
1210
C31
33pF
VCOMP1
R33 10k
U1
SW0
C26
0
33pF
R26
0
C30
C27
C7
22uF
1210
VIN
FDMF6820A
C6
22uF
1210
VCOMP0
R30 10k
E29
GND
FSW=500kHz
BG1/EN1
TG1/PWM1
ISENSE1+
ISENSE1-
VSENSE1+
FB1
COMP1
TSNS1
TSNS0
COMP0
FB0
VSENSE0-
VSENSE0+
ISENSE0-
ISENSE0+
VSENSE1+
IAVG1
VCOMP0
VCC
VCC
TG0/PWM0
OPTIONAL FOR 2-PHASE OPERATION
C35
OPT
31
39
21
20
19
18
17
16
23
8
24
15
14
13
12
11
10
9
2.2uF
C16
VDD33
R19
R20
4.99K 4.99K
E3
VDD33
VSENSE0+
C36
OPT
IAVG1
IAVG0
Address=4C
R16
10K
C5
+
330uF
16V
SVP
4
7
VIN
3
1
25
VDD33
22
VDD25
IAVG_GND
5
26
VCC
4
VINSNS
GND
PGND
21
PGND
21
41
10
9
42
8
VIN
VIN
VIN
NC
22
PHASE
PGND
7
PGND
22
5
41
23
6
6
GH
PGND
24
10
9
42
8
2
CGND
GND
PGND
25
4
PGND
26
VIN
VIN
VIN
NC
PGND
5
41
PGND
25
1
BOOT
2
PGND
3
VCIN
VDRV
27
PHASE
PGND
23
GH
PGND
24
CGND
GND
PGND
26
4
BOOT
PGND
27
VCIN
3
VDRV
PGND
28
SMOD#
VSWH
VSWH
VSWH
43
29
30
1
SMOD#
PGND
28
VSWH
VSWH
VSWH
43
29
30
5
PAD3
31
32
33
34
35
36
37
38
39
40
PAD6
PAD5
TG1_PWM1
31
32
33
34
35
36
37
38
39
40
PAD2
R56
10K
SW0
R55
C66
C20
470uF
OPT
+
C11
100uF
1210
C45
C46
100uF 100uF
1210
1210
2
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
C41
470uF
D3L
+
HZ
SCALE = NONE
YI S.
C50
470uF
D3L
0
+
R28
R12
30
1W
0
C15
470uF
D3L
2
2
E9
E8
E7
E6
1
J6
J3
J4
J5
GND
HAORAN W.
YI S.
APPROVED
DATE
6-14-14
12-10-14
DATE:
N/A
SIZE
1
DEMO CIRCUIT 1936A
LTC3882EUJ
Friday, January 23, 2015
IC NO.
SHEET 1
2
OF 3
REV.
DUAL/POLY-PHASE HIGH PERFORMANCE
DC/DC CONVERTER WITH DIGITAL POWER 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
ADJ, MAX 30A
GND
VOUT1
VOUT0-
VOUT0+
GND
VOUT0
ADJ, MAX 30A
PRODUCTION
PRODUCTION ASSEMBLY
DESCRIPTION
REVISION HISTORY
TECHNOLOGY
R63
30
1W
REV
R27
+
__
ECO
TITLE: SCHEMATIC
C49
470uF
D3L
+
C44
470uF
OPT
C14
470uF
D3L
+
APPROVALS
C48
100uF
1210
+
C43
470uF
OPT
+
VSENSE1+
C23
470uF
D3L
+
C21
470uF
OPT
C42
470uF
OPT
+
C12
100uF
1210
+
C47
100uF
1210
VOUT1
0
C19
470uF
OPT
R45
CUSTOMER NOTICE
0
R43
VSENSE0-
VSENSE0+
+
C9
C10
100uF 100uF
1210
1210
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
PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
SW1
PULSE
PA0515.221
L2
0.22uH
0.22uF
0.22uF
1.21k
C24
1.21k
R8
PULSE
PA0515.221
L1
0.22uH
R6
10K
TG0_PWM0
2
A
B
C
D
DEMO MANUAL DC1936A
SCHEMATIC DIAGRAM
dc1936afa
11
A
B
C
D
4
3
2
1
SDA
SCL
WP
VCC
GND
E20
24LC025-I/ST
VSS
A2
A1
A0
U4
5
TO DC1613A
AUXP
SDA
GND
SCL
LGKPWR
ALERTB
GPIO_1
OUTEN_0
OUTEN_1
GND
AUXSCL
AUXSDA
J10
C54
100nF
5
6
7
EESDA
EESCL
EEWP
8 AUXVCC
1
2
3
4
5
6
7
8
9
10
11
12
3V3
R79
4.99K
R80
4.99K
ALERTB
3
2
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
OPT
OPT
R77
GPIO0B
E13
SCL
DEMO HEADER (M)
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
SCL
E12
SDA
R76
J15
SDA
E11
ALERTB
1
D4
R105
0
R103
OPT
1206
GPIO1B
R107
OPT
1
R70
OPT
D3
GPIO1
2N7002A
Q16
GREEN
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
OPT
3
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
2
SCALE = NONE
YI S.
HZ
APPROVALS
ALERTB
1
5
OFF
ON
SW3
RUN1
R67
OPT
D5
ALERTB
RED
C38
10nF
0603
TP0101K
Q14
C51
10nF
0603
R61 10K
3
2
GPIO0B
2
E19
VDD33
GND
VDD33
RUN1
RUN1
RUN0
RUN0
E18
R62
15.8K
0603
GPIO1B
GPIO1B
GPIO0B
E17
E16
E10
R73 10k
R104
10
0603
1
DATE:
N/A
SIZE
1
DEMO CIRCUIT 1936A
Wednesday, December 10, 2014
IC NO.
SHEET 2
2
OF 3
REV.
DUAL/POLY-PHASE HIGH PERFORMANCE
DC/DC CONVERTER WITH DIGITAL POWER MANAGEMENT
LTC3882EUJ
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
3V3
VCC
OFF
5
ON
SW4
RUN0
VDD33
1
TECHNOLOGY
TP0101K
Q13
R100
127
3V3
2
0603
R69
10
0603
R65
OPT
C
NC
RUN0-RUN1
3
JP2
R72 10k
D7
OPT
TITLE: SCHEMATIC
1
D8
OPT
C
NC
GPIO0-GPIO1
3
JP1
J14 DEMO HEADER (F)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
R71
R68 0
R66 OPT
R97
200
3V3
CUSTOMER NOTICE
3V3
E15
E14
R64 0
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
2N7002A
Q15
GREEN
GPIO0
R96
200
3V3
VIN
VIN
SHARE_CLK
SYNC
SYNC
SHARE_CLK
2
ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN
3
2
2
4
3
2
4
1
6
3
2
3
4
1
6
3
12
1
5
A
B
C
D
DEMO MANUAL DC1936A
SCHEMATIC DIAGRAM
dc1936afa
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
OFF
ON
5V_BIAS
JP3
C67
0.1uF
2
R86
10K
VIN
5
GND
5V_BIAS
D6
E22
E21
1206
C63
10uF
5V_BIAS
R101
VIN
C58
2.2uF
0
R94
2K
R90
6.19K
C64
0.01uF
C59
U7
1uF
LT3029IMSE
TG1_PWM1
VDD33
R84
2.2
16
1
3
4
15
IN
VLOGIC
VCC
ADJ1
BYP1
VOUT1
VOUT1
R82
U5
0
9
GND
LTC4449EDCB
BOOST
SHDN1
VIN
5
6
7
8
14
VIN1
5V_BIAS
12
VIN2
D
1
3
1
2
11
2
BG
TS
TG
D2
ADJ2
BYP2
VOUT2
VOUT2
9
8
6
7
10
GND
SHDN2
VIN2
4
3
2
1
1
4
C65
0.01uF
4
R95
2K
C60
10uF
1206
VCC
4
Q7
RJK0330DPB
R91
6.19K
C55
0.22uF
Q3
RJK0305DPB
5
1
2
3
5
2
1
2
3
ON
VCC
OFF
JP4
R87
10K
VIN
4
Q8
RJK0330DPB
4
Q4
RJK0305DPB
1
3
5
1
2
3
5
1
2
3
OPTIONAL FOR DISCRETE DRIVER AND FETS
SW1
CIN1
22uF
16V
1210
VIN
R102
TG0_PWM0
VDD33
PULSE0 IN
GND
3
E27
DO NOT EXCEED 5% DUTY CYCLE!
E23
R88
10K
4
Q11
RJK0305DPB
VOUT0
C57
2.2uF
0
R85
2.2
5V_BIAS
DYNAMIC LOAD CIRCUIT 0
CIN2
22uF
16V
1210
2
R92
0.01
5
6
7
8
IN
1
J11
GND
BG
TS
TG
D1
C56
0.22uF
PULSE1 IN
E24
GND
SCALE = NONE
YI S.
HZ
APPROVALS
E28
VOUT1
VIN
SW0
R93
0.01
CIN3
22uF
16V
1210
IOUT1
TST
50
1
TECHNOLOGY
NOTE:
PULSE OUT
10mV / AMP
E26
C62
2.2uF
R99
CIN4
22uF
16V
1210
J12
1
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
VOUT1
DATE:
N/A
SIZE
DEMO CIRCUIT 1936A
LTC3882EUJ
1
Wednesday, December 10, 2014
IC NO.
SHEET 3
2
OF 3
REV.
DUAL/POLY-PHASE HIGH PERFORMANCE
DC/DC CONVERTER WITH DIGITAL POWER MANAGEMENT
TITLE: SCHEMATIC
R89
10K
4
Q12
RJK0305DPB
DO NOT EXCEED 5% DUTY CYCLE!
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
2
4
Q10
RJK0330DPB
4
Q6
RJK0305DPB
DYNAMIC LOAD CIRCUIT 1
4
Q9
RJK0330DPB
4
Q5
RJK0305DPB
CUSTOMER NOTICE
VOUT0
4
3
2
1
1
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
NOTE:
PULSE OUT
10mV / AMP
E25
50
9
GND
IOUT0
TST
R57
C61
2.2uF
VLOGIC
VCC
BOOST
0
LTC4449EDCB
U6
R83
2
OPTIONAL FOR DISCRETE DRIVER AND FETS
5
1
2
3
3
2
3
4
5
5
1
2
3
5
1
2
3
5
1
2
3
5
1
2
3
4
2
3
4
5
13
VIN1
NC
2
GND
5
GND
17
5
1
2
3
5
A
B
C
D
DEMO MANUAL DC1936A
SCHEMATIC DIAGRAM
dc1936afa
13
DEMO MANUAL DC1936A
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
dc1936afa
14 Linear Technology Corporation
LT 0115 REV A • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2015
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