1
dc1936afa
DEMO MANUAL DC1936A
DESCRIPTION
LTC3882EUJ
Dual Output Step-Down DC/DC Controller
with Power System Management
Demonstration circuit 1936A is a high current, high ef-
ficiency, 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 pro-
duces 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 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
management features of the parts, download the GUI
software LTpowerPlay™ onto your PC and use LT C ’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
Specifications are at TA = 25°C
*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.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Supply Range 7 12 14 V
VOUT0,1 Output Voltage Range IOUT = 0A TO 30A, VIN = 7V to 14V 0.8 1 1.8* V
IOUT0,1 Output Current Range 0 30 A
fSW Factory Default Switching 500 kHz
EFF Peak Efficiency VIN = 12V, VOUT0 = 1V, See Figure 4 90.4 %
LOAD TRANSIENT Output Voltage Peak-to-Peak Spike During
Load Transient
VIN = 12V, VOUT0 = 1V, ISTEP = 0A – 7.5A 30 mV
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dc1936afa
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:
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.
1. Make sure jumpers are in the following positions:
JUMPER POSITION FUNCTION
JP1 C GPIO0B to GPIO1B
JP2 NC RUN0 to RUN1
JP3 ON 5V Bias for DrMOS
JP4 ON Bias Supply for VCC of the LTC3882
JP5 OFF Write Protection
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.
5. Turn on RUN switch as desired.
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)
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.
Connecting a PC to DC1936A
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, 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.
Figure 1. Demo Setup with PC
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dc1936afa
DEMO MANUAL DC1936A
QUICK START PROCEDURE
Figure 2. Power Test Setup for DC1936A
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 Turn on one channel only.
n Apply external 5V from E21 to E22 as the driver supply
for DrMOS.
n Apply external 5V from E5 to E29 as VCC for LTC3882.
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 =
V
OUT
•I
OUT
V
IN
•I
IN
+V
DR
•I
DR
+V
CC
•I
CC
•100%
Measuring Output Ripple Voltage
An accurate ripple measurement may be performed by
using the configuration across C10 as shown in Figure 3.
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DEMO MANUAL DC1936A
QUICK START PROCEDURE
Figure 4. Typical Efficiency Curves of DC1936A, VIN = 12V, fSW = 500kHz, Single Phase
Figure 3. Measuring Output Voltage Ripple
+ –
VOUT GND
COUT
LOAD CURRENT (A)
0
EFFICIENCY (%)
92
90
88
86
84
82
91
89
87
85
83
81
80 2010 30
dc1936a F04
35
155 25
12VIN, 1VOUT, 500kHz
12VIN, 1.2VOUT, 500kHz
12VIN, 0.9VOUT, 500kHz
12VIN, 0.8VOUT, 500kHz
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DEMO MANUAL DC1936A
LTpowerPlay SOFTWARE GUI
LTpowerPlay is a powerful Windows based development
environment that supports Linear Technology power sys-
tem 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 mul-
tichip 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 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://linear.com/ltpowerplay
To access technical support documents for LT C Digital
Power Products visit Help. View online help on the
LTpowerPlay menu.
Figure 7. LTpowerPlay Main Interface
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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:
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.
d. If you want to change the output voltage to a different
value, like 1.5V. In the Config tab, type in 1.5 in the
VOUT_COMMAND box, like this:
Then, click the W (PC to RAM) icon to write these reg-
ister values to the LTC3882. After finishing this step,
you will see the output voltage will change to 1.5V.
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dc1936afa
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
Required Circuit Components
1 4 C6, C7, C39, C40 CAP., X5R 22µF 25V 10% 1210 AVX, 12103D226KAT2A
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, PA0515.221N LT
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 2 U1, U3 IC, HIGH FREQUENCY DrMOS MOUDLE FAIRCHILD, FDMF6820A
26 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
Additional Demo Board Circuit Components
1 0 CIN1, CIN2, CIN3, CIN4 OPT CAP., X5R 22µF 25V 10% 1210 AVX, 12103D226KAT2A
2 2 C35, C36 OPT CAP., X7R 47pF 5% 50V 0603 OPT
3 2 C60, C63 CAP., X5R 10µF 35V 1206 TAIYO YUDEN, GMK316BJ106ML-T
4 0 C55, C56, C57, C58, C19, C20, C21,
C42, C43, C44 OPT
CAP., 0603
5 0 D1, D2 OPT DIODE, SCHOTTKY, SOD-323
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,
R102, R46, R47, R58, R59, R60, R66,
R71, R98, R65, R70, R76, R77, R67,
R103, R107 OPT
RES., CHIP, 0603
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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dc1936afa
DEMO MANUAL DC1936A
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
PARTS LIST
11
dc1936afa
DEMO MANUAL DC1936A
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
SGND AND PGND
CONNECTED AT
A SINGLE NODE
NEAR U2
7V - 14V
ADJ, MAX 30A
1210
SVP
16V
SVP
1210
16V
1210
1210 1210
D3L
1210 D3L
1210 1210
1210 1210 1210 D3L
1210 D3L
ADJ, MAX 30A
PLACE Q1,Q2 NEAR L1,L2. RESPECTIVELY
2. INSTALL SHUNTS AS SHOWN.
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
NOTE: UNLESS OTHERWISE SPECIFIED
D3L
OPT OPT OPT
D3L
OPT OPT OPT
FSW=500kHz
ON
OFF
WP
OPTIONAL FOR 2-PHASE OPERATION
DC/DC CONVERTER WITH DIGITAL POWER MANAGEMENT
Address=4C
PA0515.221
PA0515.221
2PRODUCTION ASSEMBLY HAORAN W. 12-10-14
VIN
VOUT0
5V_BIAS
5V_BIAS
VIN
VIN
VOUT1
VDD25VDD33
VDD25
VCC
VDD33
TG0_PWM0
SW0
TG0_PWM0
SW0
SW1
SW1
TG1_PWM1
IAVG0
IAVG1
IAVG_GND
RUN0
RUN1
GPIO1B
GPIO0B
ALERTB
SDA
SCL
SHARE_CLK
SYNC
TG1_PWM1
VSENSE0+
VSENSE0-
VIN
VCOMP0
VCOMP1
VFB1
VCOMP0VCOMP1
VFB1
IAVG1IAVG0
VSENSE1+VSENSE0+
VSENSE1+
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
YI S.
PRODUCTION
2 6-14-14
__
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
YI S.
PRODUCTION
2 6-14-14
__
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
YI S.
PRODUCTION
2 6-14-14
__
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 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, January 23, 2015
13
DUAL/POLY-PHASE HIGH PERFORMANCE
HZ
YI S.
N/A
LTC3882EUJ
DEMO CIRCUIT 1936A
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 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, January 23, 2015
13
DUAL/POLY-PHASE HIGH PERFORMANCE
HZ
YI S.
N/A
LTC3882EUJ
DEMO CIRCUIT 1936A
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 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, January 23, 2015
13
DUAL/POLY-PHASE HIGH PERFORMANCE
HZ
YI S.
N/A
LTC3882EUJ
DEMO CIRCUIT 1936A
PAD8
R15
10K
E8 VOUT1
L1
0.22uH
PULSE
JP5
1
2
3
R28
0
E29
GND
Q2
R8
1.21k
R55
1.21k
C24 0.22uF
R63
30
1W
R14
10K
R41 OPT
C45
100uF
J1
VIN
R49 0
R13
10K
R5 1
C32 3.3nF
+
C43
470uF
C25 3.3nF
C29
10nF
R58 0
Q1
R42 OPT
C46
100uF
C39
22uF
E3
VDD33
PAD4
J6
GND
R33 10k
U2
LTC3882EUJ
COMP0 1
TSNS0 2
TSNS1 3
VINSNS 4
IAVG_GND
5
BG0/EN0 6
TG0/PWM0 7
SYNC
8
SCL
9
SDA
10
ALERT
11
GPIO0
12
GPIO1
13
RUN0
14
RUN1
15
ASEL0
16
ASEL1
17
VOUT0_CFG
18
VOUT1_CFG
19
FREQ_CFG
20
PHAS_CFG
21
VDD25 22
WP
23
SHARE_CLK
24
VDD33 25
VCC 26
TG1/PWM1 27
BG1/EN1 28
COMP1 29
FB1 30
IAVG1
31
ISENSE1+ 32
ISENSE1- 33
VSENSE1+ 34
VSENSE0- 35
VSENSE0+ 36
ISENSE0- 37
ISENSE0+ 38
IAVG0
39
FB0 40
GND
41
+
C44
470uF
PAD6
E2
GND
E5
VCC
R30 10k
R21 0
+
C49
470uF
E4
VDD25
R51
10
R34 OPT
E1
VIN
R31 17.4k
R59 0
C18
4.7uF
R20
4.99K
C26 330pF
R16
10K
+
C14
470uF
R46 OPT
+
C50
470uF
R48 0
PAD5
R98 0
R35 OPT
C28
10nF
+
C23
470uF
J3
VOUT0
R4
2k
C7
22uF
+
C20
470uF
C66 0.22uF
C17
1uF
C48
100uF
FDMF6820A
U3
SMOD# 1
VCIN 2
VDRV 3
BOOT 4
CGND 5
GH 6
PHASE 7
NC 8
VIN 9
VIN 10
VIN
11
VIN
12
VIN
13
VIN
14
VSWH
15
PGND
16
PGND
17
PGND
18
PGND
19
PGND
20
PGND
21
PGND
22
VSWH 31
PGND
23
PGND
24
PGND
25
PGND
26
PGND
27
PGND
28
VSWH
29
VSWH
30
VSWH 32
VSWH 33
VSWH 34
VSWH 35
GL 36
CGND 37
NC 38
DISB# 39
PWM 40
VSWH
43
VIN 42
GND 41
R52
2k
R44 0
+
C19
470uF R27
0
C16
2.2uF
R17
10K
+
C21
470uF
R12
30
1W
C47
100uF
R3
10
R37 OPT
R47 OPT
C9
100uF
R26 0
R6
10K
PAD7
PAD1
C3
1uF
FDMF6820A
U1
SMOD# 1
VCIN 2
VDRV 3
BOOT 4
CGND 5
GH 6
PHASE 7
NC 8
VIN 9
VIN 10
VIN
11
VIN
12
VIN
13
VIN
14
VSWH
15
PGND
16
PGND
17
PGND
18
PGND
19
PGND
20
PGND
21
PGND
22
VSWH 31
PGND
23
PGND
24
PGND
25
PGND
26
PGND
27
PGND
28
VSWH
29
VSWH
30
VSWH 32
VSWH 33
VSWH 34
VSWH 35
GL 36
CGND 37
NC 38
DISB# 39
PWM 40
VSWH
43
VIN 42
GND 41
R54
1
R38 OPT
E6
VOUT0+
+
C4
330uF C6
22uF
R56
10K
+
C5
330uF
C30 33pF
+
C15
470uF
R18
10K
J4
GND
R43
0
R29 357
C37
1uF
J2
GND
J5
VOUT1
R39 OPT
C35
OPT
C11
100uF
C31 330pF
E7
VOUT0-
C2
2.2uF
16V
R36 357
L2
0.22uH
PULSE
R60 0
R45 0
C8
100nF
C27 33pF
C12
100uF
R32 16.2k
PAD2
C34
2.2uF
16V
C10
100uF
C1
1uF
R19
4.99K
+
C41
470uF
R40 OPT
PAD3
C40
22uF
E9 GND
R1 0
C36
OPT
+
C42
470uF
C33
1uF
12
dc1936afa
DEMO MANUAL DC1936A
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN
DC/DC CONVERTER WITH DIGITAL POWER MANAGEMENT
CNC
RUN0-RUN1
CNC
GPIO0-GPIO1
TO DC1613A
ON
OFF
ON
OFF
RUN0RUN1
1206
GPIO0 GPIO1
ALERTB
Wednesday, December 10, 2014
AUXVCC
EEWP
EESDA
EESCL
3V3
VIN
3V3
3V3
3V3 VDD33
VCC
3V3 3V3
VDD33
VDD33
VIN
ALERTB SDA SCL
RUN0
RUN1
GPIO1B
GPIO0B
SYNC
SHARE_CLK
GPIO0B GPIO1B
ALERTB
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 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
23
DUAL/POLY-PHASE HIGH PERFORMANCE
HZ
YI S.
N/A
LTC3882EUJ
DEMO CIRCUIT 1936A
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 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
23
DUAL/POLY-PHASE HIGH PERFORMANCE
HZ
YI S.
N/A
LTC3882EUJ
DEMO CIRCUIT 1936A
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 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
23
DUAL/POLY-PHASE HIGH PERFORMANCE
HZ
YI S.
N/A
LTC3882EUJ
DEMO CIRCUIT 1936A
R100
127
JP1
1
2
3
D5 RED
Q16
2N7002A
2 3
1
E14
SHARE_CLK
D3
GREEN
R73 10k
0603
D7
OPT
R72 10k
0603
R70
OPT
E16
GPIO0B
R71 OPT
C38
10nF
0603
R80
4.99K R103
OPT
E19
GND
R67
OPT
R79
4.99K
R96
200
C51
10nF
0603
D8
OPT
R68 0
SW3
1
2
3
4
5
6
E11
ALERTB
SW4
1
2
3
4
5
6
E13
SCL
D4 GREEN
J10
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
R69
10
0603
R97
200
E12
SDA
R107
OPT
E17
RUN0
E10
GPIO1B
J14 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
Q15
2N7002A
2 3
1
Q14
TP0101K
23
1
R65
OPT
R76 OPT
Q13
TP0101K
23
1
E18
RUN1
R105
0
C54 100nF
J15 DEMO 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
E15
SYNC
E20
GND
U4
24LC025-I/ST
A0
1
A1
2
A2
3
VSS
4SDA 5
SCL 6
WP 7
VCC 8
R61 10K
R64 0
R104
10
0603
R62
15.8K
R77 OPT
JP2
1
2
3
R66 OPT
13
dc1936afa
DEMO MANUAL DC1936A
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 representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
OPTIONAL FOR DISCRETE DRIVER AND FETS
DYNAMIC LOAD CIRCUIT 0
DO NOT EXCEED 5% DUTY CYCLE!
NOTE:
PULSE OUT
10mV / AMP
VOUT0
IOUT0
TST
NOTE:
PULSE OUT
10mV / AMP
IOUT1
TST
DO NOT EXCEED 5% DUTY CYCLE!
VOUT1
DYNAMIC LOAD CIRCUIT 1
1206 1206
ON
OFF
5V_BIAS
ON
OFF
VCC
OPTIONAL FOR DISCRETE DRIVER AND FETS
DC/DC CONVERTER WITH DIGITAL POWER MANAGEMENT
Wednesday, December 10, 2014
VOUT0 VOUT1
VIN
5V_BIAS
VIN
5V_BIAS
5V_BIAS
VIN
VCC
VINVIN
VDD33
VDD33
TG1_PWM1
SW1
TG0_PWM0
SW0
VIN
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 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
33
DUAL/POLY-PHASE HIGH PERFORMANCE
HZ
YI S.
N/A
LTC3882EUJ
DEMO CIRCUIT 1936A
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 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
33
DUAL/POLY-PHASE HIGH PERFORMANCE
HZ
YI S.
N/A
LTC3882EUJ
DEMO CIRCUIT 1936A
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 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
33
DUAL/POLY-PHASE HIGH PERFORMANCE
HZ
YI S.
N/A
LTC3882EUJ
DEMO CIRCUIT 1936A
C67
0.1uF
D1
2 1
E23
PULSE0 IN
R91
6.19K
Q8
RJK0330DPB
1
2
5
3
4
C57
2.2uF
E28
GND
D6
2 1
R90
6.19K
R102 0
J12
1
2
3
4
5
Q10
RJK0330DPB
1
2
5
3
4
Q6
RJK0305DPB
1
2
5
3
4
C62
2.2uF
Q5
RJK0305DPB
1
2
5
3
4
Q9
RJK0330DPB
1
2
5
3
4
R86
10K
CIN2
22uF
16V
1210
CIN4
22uF
16V
1210
E24
PULSE1 IN
Q4
RJK0305DPB
1
2
5
3
4
R83 0
Q7
RJK0330DPB
1
2
5
3
4
10uF
C63
R88
10K
JP4
1
2
3
Q11
RJK0305DPB
1
2
5
3
4
U5
LTC4449EDCB
VCC
7
VLOGIC
6
IN
5GND 4
BG 3
TS 2
TG 1
BOOST
8
GND
9
R87
10K
E25
R94
2K
R92
0.01
U7
LT3029IMSE
BYP1
1
VIN1 13
BYP2 8
ADJ2 9
GND
5
ADJ1
16
SHDN1
15
VOUT1
4
SHDN2 10
VOUT2 7
VIN2 12
VOUT1
3VOUT2 6
VIN1 14
VIN2 11
NC
2
GND
17
U6
LTC4449EDCB
VCC
7
VLOGIC
6
IN
5GND 4
BG 3
TS 2
TG 1
BOOST
8
GND
9
C65
0.01uF
R84
2.2
E27
GND
CIN3
22uF
16V
1210
R57 50
C64
0.01uF
R99 50
E22
GND
CIN1
22uF
16V
1210
E21
5V_BIAS
C61
2.2uF
Q3
RJK0305DPB
1
2
5
3
4
R82 0
E26
C55
0.22uF
R85
2.2
10uF
C60
D2
2 1
R89
10K
C59
1uF
R95
2K
C58
2.2uF
JP3
1
2
3
Q12
RJK0305DPB
1
2
5
3
4
J11
1
2
3
4
5
R101 0
R93
0.01
C56
0.22uF
14
dc1936afa
DEMO MANUAL DC1936A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
LINEAR TECHNOLOGY CORPORATION 2015
LT 0115 REV A • PRINTED IN USA
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LT C ) 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 LT C 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 LT C 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. LT C assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LT C 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 LT C applica-
tion engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
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