DC2089A - Demo Manual

DEMO MANUAL
DC2089A-A/DC2089A-B
LTC3880EUJ LTC3870EUFD
Poly-Phase Step-Down DC/DC Controller
with Power System Management
Description
Demonstration circuit 2089A is a high current, high efficiency, poly-phase synchronous buck converter featuring
the LTC®3880EUJ, a dual-phase current mode controller,
and the LTC3870EUFD, a dual-phase slave controller.
The LTC3880 has the PMBus interface and power system
management functions.
The DC2089A uses discrete MOSFETs 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 output current is up to 80A for 4-phase operation. The
DC2089A has two versions, the DC2089A-A uses a current
sense resistor, while the DC2089A–B has DCR current
sensing. The factory default setting for the output voltage
is 1.0V. The DC2089A also has an on-board dynamic load
circuit, which makes it easy for the customer to evaluate
the transient performances.
The DC2089A powers up to default settings and produces
power based on configuration resistors or NVM without
the need for any serial bus communication. This allows
Performance Summary
SYMBOL PARAMETER
easy evaluation of the DC-DC converter aspects of the
LTC3880. To fully explore the extensive power system
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 in EEPROM, view telemetry
of 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”.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2089A
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Specifications are at TA = 25°C
CONDITIONS
MIN
TYP
MAX
UNITS
7
12
14
V
0.8
1.0
1.8
V
80
A
DC2089A-A Assembly (RSENSE Current Sense)
VIN
Input Supply Range
VOUT0
Output Voltage Range
IOUT0
Output Current Range
FSW
Factory Default Switching
EFF
Peak Efficiency
IOUT = 0A TO 80A, VIN = 7.0V to 14V
0
VOUT = 1.0V, See Figure 4.
350
kHz
88.8
%
DC2089A-B Assembly (DCR Current Sense)
VIN
Input Supply Range
VOUT0
Output Voltage Range
IOUT0
Output Current Range
FSW
Factory Default Switching
EFF
Peak Efficiency
IOUT = 0A TO 80A, VIN = 7.0V to 14V
7
12
14
V
0.8
1.0
1.8
V
80
A
0
VOUT = 1.0V, See Figure 5.
350
kHz
88.2
%
dc2089af
1
DEMO MANUAL
DC2089A-A/DC2089A-B
Quick Start Procedure
Demonstration circuit 2089A makes it easy to set up to
evaluate the performances of the LTC3880 and the slave
controller LTC3870. 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 C28. See Figure 3
for proper scope probe technique.
1. Make sure jumpers are in the following positions:
JUMPER POSITION FUNCTION
JP1
JP3
JP4
JP5
OFF
C
C
EXT
Power supply for pulse generator
GPIO0B to GPIO1B
RUN0 to Run1
External/Internal pulse for load
transient circuit
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 (SW1, SW2) are OFF.
4. Turn on the power at the input.
NOTE: Make sure that the input voltage does not
exceed 16V.
5. Turn on both RUN switches as desired.
6. Check for the correct output voltage from E5 to E6.
VOUT = 1.0V ±0.5% (1.005V ~ 0.995V)
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 voltage
from the GUI. See “LTpowerPlay QUICK START” session for details.
Connecting a PC to DC2088A
You can use a PC to reconfigure the power management
features of the LTC3880 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.
Figure 1. Demo Setup with PC
2
dc2089af
DEMO MANUAL
DC2089A-A/DC2089A-B
Quick Start Procedure
+
VIN
–
+
IIN
–
–
LOAD
+
SHUNT
POWER
SUPPLY
+
–
Figure 2. Power Test Setup
dc2089af
3
DEMO MANUAL
DC2089A-A/DC2089A-B
Quick Start Procedure
Measuring Efficiency
Measuring Output Ripple Voltage
To accurately measure efficiency of any configuration, do
the following:
An accurate ripple measurement may be performed by
using the below configuration across C28.
nn
nn
Set JP1 to OFF position to disable the auxiliary circuits.
Measure VIN across the input ceramic capacitor
(C25). Measure VOUT across the output ceramic
capacitor (C28).
+
–
COUT
VOUT
GND
Figure 3. Measuring Output Voltage Ripple
92
90
90
88
86
EFFICIENCY (%)
EFFICIENCY (%)
88
86
84
DC2089A-A 12VIN 1.0VOUT
DC2089A-A 12VIN 1.2VOUT
82
DC2089A-B 12VIN 1.0VOUT
DC2089A-B 12VIN 1.2VOUT
78
78
0
10
20
30
50
40
60
LOAD CURRENT (A)
70
80
90
DC2089A F04
Figure 4. Typical Efficiency Curves DC2089A-A, FSW = 350kHz
4
82
80
80
76
84
76
0
10
20
30
50
40
60
LOAD CURRENT (A)
70
80
90
DC2089A F05
Figure 5. Typical Efficiency Curves DC2089A-B, FSW = 350kHz
dc2089af
DEMO MANUAL
DC2089A-A/DC2089A-B
LTpowerPlay software gui
LTpowerPlay is a powerful Windows based development
environment that supports Linear Technology® power
system management ICs, including the LTC3880, LTC3883,
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 LTC3880’s
DC2089A 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 6. LTpowerPlay Main Interface
dc2089af
5
DEMO MANUAL
DC2089A-A/DC2089A-B
LTpowerPlay Quick Start Procedure
The following procedure describes how to use LTpowerPlay
to monitor and change the settings of LTC3880.
1. Download and install the LTPowerPlay GUI:
http://www.linear.com/ltpowerplay
c. In the Toolbar, click the “R” (RAM to PC) icon to
read the RAM from the LTC3880. This reads the
configuration from the RAM of LTC3880 and loads
it into the GUI.
2. Launch the LTpowerPlay GUI.
a. The GUI should automatically identify the DC2089A.
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 LTC3880
is communicating:
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
register values to the LTC3880. After finishing this step,
you will see the output voltage will change to 1.5V.
6
dc2089af
DEMO MANUAL
DC2089A-A/DC2089A-B
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
DC2089A-A Required Circuit Components
1
2
C1, C2
CAP., OS-CON, 330µF, 16V, 20%, F12
SANYO, 16SVP330M
2
8
C3, C4, C24, C25, C40, C41, C58, C59
CAP., X5R, 10µF, 16V, 10%, 1210
TAIYO YUDEN EMK325BJ106KN
3
6
C5, C18, C26, C42, C53, C57, C70
CAP., X5R, 100nF, 25V, 10%, 0603
AVX 06033C104KAT2A
4
3
C6, C39, C43
CAP., X5R, 4.7µF, 16V, 10%, 0603
TDK C1608X5R1C475K
AVX 06033D105KAT2A
5
2
C7, C8
CAP., X5R, 1µF, 25V, 10%,
6
14
C9, C10, C15, C16, C28, C29, C44, C45, C46,
C49, C60, C61, C62, C65
CAP., X5R, 100µF, 6.3V, 10%,1210
0603
AVX 12106D107AT2A
7
12
C11, C12, C30, C31, C32, C33, C34, C35, C47,
C48, C63, C64
CAP, POSCAP 330µF 4V D3L
SANYO, 4TPF330ML
8
2
C22, C23
CAP., X7R, 100pF, 25V, 10%, 0603
AVX 06033C101KAT2A
9
2
C27, C36
CAP., X5R, 10nF, 16V, 10%, 0603
AVX 0603YC103KAT2A
AVX 06035A470JAT2A
10
2
C54, C56
CAP., NP0, 47pF, 50V, 5%,
11
4
C19, C38, C55, C68
CAP., X5R 1000pF, 50V 5% 0603
0603
AVX, 06035C102JAT2A
12
1
C21
CAP., X5R, 1500pF, 25V, 10%, 0603
NIC NMC0603X7R152K50TRPF
13
4
L1, L2, L3, L4
INDUCTOR, POWER, 0.25µH
WURTH ELEC., 744301025
14
4
D1, D2, D3, D4
DIODE, SCHOTTKY, SOD-323
CENTRAL CMDSH-3TR
15
4
Q1, Q6, Q12, Q15
XSTR, POWER MOSFET
LFPAK
16
4
Q3, Q9, Q13, Q18
XSTR, POWER MOSFET
LFPAK
17
2
Q7, Q10
TRANS GP SS PNP 40V SOT-23
ON SEMI, MMBT3906LT1G
INFINEON BSC050NE3LS G
INFINEON BSC010NE2LSI
18
2
R1, R40
RES., CHIP, 2Ω, 1%,
0603
YAGEO, RC0603FR-072RL
19
8
R2, R3, R4, R5, R20, R27, R31, R122, R123
RES., CHIP, 10k, 1%
0603
NIC NRC06F1002TRF
20
33
R8, R17, R18, R24, R26, R37, R39, R41, R42,
R45, R46, R47, R48, R49, R50, R52, R56, R57,
R60, R62, R85, R124–R127, R74, R105, R109,
R115, R103, R108, R112, R118
RES., CHIP, 0Ω, 1%
0603
VISHAY, CRCW06030000Z0EA
21
4
R12, R13, R14, R15
RES SENSE., CHIP, 0, 1W2512
VISHAY WSL251200000ZEA9
22
1
R25
RES., CHIP, 7.32k, 1%
0603
NIC NRC06F7321TRF
23
1
R28
RES., CHIP, 16.2k, 1%
0603
NIC NRC06F1622TRF
24
1
R29
RES., CHIP, 17.4k, 1%
0603
NIC NRC06F1742TRF
dc2089af
7
DEMO MANUAL
DC2089A-A/DC2089A-B
Parts List
ITEM
QTY
REFERENCE
PART DESCRIPTION
25
2
R33, R35
RES., CHIP, 5.76k, 1%,
0603
NIC NRC06F5761TRF
MANUFACTURER/PART NUMBER
26
1
R51
RES., CHIP, 90.9k, 1%
0603
NIC NRC06F9092TRF
27
1
R3
RES., CHIP, 4.99k, 1%
0603
VISHAY CRCW06034K99FKEA
28
1
R16
RES., CHIP, 3.48k, 1%,
0603
NIC NRC06F3481TRF
29
8
R65, R66, R68, R104, R102, R107, R111, R117
RES., CHIP, 100 , 1%
0603
VISHAY, CRCW0603100RFKEA
30
4
R75, R106, R110, R116,
RES SENSE, 0.001
2512
VISHAY WSL25121L000FEA
31
1
U1
IC, LTC3880EUJ, QFN40P 6mm x 6mm
LTC., LTC3880EUJ
32
1
U2
IC, LTC3870EUF, QFN28P 4mm x 5mm
LTC., LTC3870EUFD
DC2089A-A Additional Circuit Components
1
1
C70
CAP., X5R, 100nF,25V, 10% 0603
AVX 06033C104KAT2A
2
1
C73
CAP., X5R, 4.7µF,16V, 10% 0603
TDK C1608X5R1C475K
3
0
C13, C14, C50, C51, C66, C67
CAP, POSCAP OPT
4
0
C20
CAP, OPT,0603
5
2
C71, C72
CAP., X5R, 10nF,16V, 10%
0603
6
3
C74, C78, C79
CAP., X5R, 1µF, 16V, 10%
1206
7
2
C77, C82
CAP., X5R, 2.2µF,50V, 10% 0805
MURATA GRM21BR61H225KA73L
8
1
C80
CAP., NPO, 150pF, 6.3V0603
AVX 06036A151JAT2A
9
1
C81
CAP., X7R, 1µF, 16V, 10%
MURATA GRM21BR71C105KA01L
10
1
D5
LED RED S-GW TYPE SMD
11
2
D6, D7
LED GREEN S-GW TYPE SMD
ROHM SML-010FTT86L
12
0
D8, D9
LED OPT SOD-323
OPT
13
0
Q2, Q4, Q5, Q8, Q11, Q14, Q16, Q17
XSTR, OPT
14
2
Q19, Q20
MOSFET P-CH 20V 0.58A SOT-23
VISHAY TP0101K-T1-E3
15
2
Q21, Q22
MOSFET N-CH 60V 115MA SOT-23
FAIRCHILD 2N7002A
16
1
Q23
MOSFET SPEED SRS 30V 30ALFPAK
RENESAS, RJK0305DPB-00#J0
17
1
R88
RES., CHIP, 2Ω, 1%
0603
YAGEO, RC0603FR-072RL
18
2
R71, R93
RES., CHIP, 10k, 1%
0603
NIC NRC06F1002TRF
19
3
R64, R67, R70
RES., CHIP, 0Ω, 1%
0603
20
0
R9, R11, R19, R30, R36, R38, R55, R58, R59,
RES., OPT0603
R61, R63, R69, R80, R81, R100, R101, R113,
R114, R119, R120, R122, R6, R21, R43, R53, R7,
R22, R44, R54
21
1
R72
RES., CHIP, 127Ω, 1%
0603
NIC NRC06F1270TRF
22
1
R73
RES., CHIP, 15.8k, 1%
0603
NIC NRC06F1582TRF
23
3
R76, R77, R96
RES., CHIP, 10Ω, 1%
0603
NIC NRC06F10R0TRF
24
2
R78, R79
RES., CHIP, 200Ω, 1%
0603
NIC NRC06F2000TRF
25
2
R82, R83
RES., CHIP, 4.99k, 1%
0603
VISHAY CRCW06034K99FKEA
26
1
R84
RES., CHIP, 100k, 1%
0603
27
1
R86
RES., CHIP, 0.001Ω, 1%, 1W2010
NIC NCSR150FR001DTR
28
0
R87
RES., CHIP, OPT2010
OPT
29
2
R89, R95
RES., CHIP, 20k, 1%
0603
NIC NRC06F2002TRF
30
1
R90
RES., CHIP, 154k, 1%
0603
NIC NRC06F1543TRF
8
D3L
0805
AVX 0603YC103KAT2A
AVX 1206YD105KAT2A
ROHM SML-0110VTT86
LFPAK
OPT
VISHAY, CRCW06030000Z0EA
OPT
NIC NRC06F1003TRF
dc2089af
DEMO MANUAL
DC2089A-A/DC2089A-B
Parts List
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
31
1
R91
RES., CHIP, 1M, 5%
0603
VISHAY CRCW06031M00JNEA
32
1
R92
RES., CHIP, 3.3Ω, 1%
0603
VISHAY CRCW06033R30FKEA
33
1
R94
RES., CHIP, 82.5Ω, 5%
0603
VISHAY CRCW060382R5FKEA
34
1
R97
RES., CHIP, 681k, 1%
0603
VISHAY CRCW0603681KFEA
2010
VISHAY, WSL2010R010FEA
35
1
R98
RES, VARIABLE 5k
36
1
R99
RES., CHIP, 0.01, 1%
BOURNS 3386P-1-502-LF
37
1
U1
IC, LTC3880EUJ, QFN40P 6mm x 6mm
LTC., LTC3880EUJ
38
1
U2
IC, LTC3870EUF, QFN28P 4mm x 5mm
LTC., LTC3870EUFD
39
1
U3
IC, 24LC05-I/ST
MICROCHIP 24LC025-I/ST
40
1
U4
IC, LT1129CS8-5,
SO8NB
41
1
U5
IC, LTC6992-1
S6-TSOT23 LINEAR TECHNOLOGY. LTC6992IS6-1
42
1
U6
IC, LT1803-5
S5-TSOT23 LINEAR TECHNOLOGY. LT1803IS5
43
0
C17, C37, C52, C69
CAP., OPT0603
OPT
TSSOP-8_4.4mm
LINEAR TECHNOLOGY, LT1129CS8-5
DC2089A-A Hardware
1
21
E1–E21
TURRET, .062"
MILL-MAX, 2308-2-00-80-00-00-07-0
2
4
JP1, JP3, JP4, JP5
HEADER, 1X3 2mm
SAMTEC TMM-103-02-L-S
3
4
XJP1, XJP3, XJP4, XJP5
SHUNT, 2mm
SAMTEC 2SN-BK-G
4
6
J1–J6
STUD, TESTPIN
PEM KFH-032-10
5
12
J1–J6 (X2)
NUT, BRASS 10-32
ANY #10-32
6
6
J1–J6
RING, LUG #10
KEYSTONE #10
7
6
J1–J6
WASHER, TIN PLATED BRASS
ANY #10
8
1
J7
HEADER, 2X7 2mm, RA (M)
MOLEX, 87760-1416
9
1
J8
HEADER, 2X6 2mm STR DL PCB
FCI 98414-G06-12ULF
10
1
J9
SOCKET, 2X7 2mm RA (F)
SULLINS, NPPN072FJFN-RC
11
3
J10, J11, J12
CONN, BNC, 5PINS
CONNEX, 112404
12
2
SW1, SW2
SWITCH, SUBMINATURE SLIDE
C&K JS202011CQN
DC2089A-B Required Circuit Components
1
2
C1, C2
CAP., OS-CON, 330µF, 16V, 20%, F12
SANYO, 16SVP330M
2
8
C3, C4, C24, C25, C40, C41, C58, C59
CAP., X5R, 10µF,16V, 10%, 1210
TAIYO YUDEN EMK325BJ106KN
3
6
C5, C18, C26, C42, C53, C57, C70
CAP., X5R, 100nF,25V, 10%, 0603
AVX 06033C104KAT2A
4
3
C6, C39, C43
CAP., X5R, 4.7µF, 16V, 10%, 0603
TDK C1608X5R1C475K
5
2
C7, C8
CAP., X5R, 1µF, 25V, 10%, 0603
AVX 06033D105KAT2A
6
14
C9, C10, C15, C16, C28, C29, C44, C45, C46,
C49, C60, C61, C62, C65
CAP., X5R, 100µF, 6.3V, 10%,1210
AVX 12106D107AT2A
7
12
C11, C12, C30, C31, C32, C33, C34, C35, C47,
C48, C63, C64
CAP, POSCAP 330µF 4V D3L
SANYO, 4TPF330ML
8
2
C22, C23
CAP., X7R, 100pF, 25V, 10%, 0603
AVX 06033C101KAT2A
9
2
C27, C36
CAP., X5R, 10nF,16V, 10%, 0603
AVX 0603YC103KAT2A
10
2
C54, C56
CAP., NP0, 47pF, 50V, 5%
0603
AVX 06035A470JAT2A
11
4
C19, C38, C55, C68
CAP., X5R 0.22µF 25V 10% 0603
AVX 06033D224KAT2A
12
1
C21
CAP., X5R, 2200pF,25V, 10% 0603
NIC NMC0603X7R222K50TRPF
13
4
C17, C37, C52, C69
CAP., X5R 1µF 25V 10% MURATA GRM188R61E105KA12D
0603
dc2089af
9
DEMO MANUAL
DC2089A-A/DC2089A-B
Parts List
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
14
4
L1, L2, L3, L4
INDUCTOR, SMT POWER 0.22µH
VISHAY, IHLP5050FD-01-022
15
4
D1, D2, D3, D4
DIODE, SCHOTTKY, SOD-323
CENTRAL CMDSH-3TR
16
4
Q1, Q6, Q12, Q15
XSTR, POWER MOSFET
LFPAK
17
4
Q3, Q9, Q13, Q18
XSTR, POWER MOSFET
LFPAK
18
2
Q7, Q10
TRANS GP SS PNP 40V SOT-23
ON SEMI, MMBT3906LT1G
19
2
R1, R40
RES., CHIP, 2Ω, 1%,
0603
YAGEO, RC0603FR-072RL
20
8
R2, R3, R4, R5, R20, R27, R31, R122, R123
RES., CHIP, 10k, 1%
0603
NIC NRC06F1002TRF
21
33
R8, R17, R18, R24, R26, R37, R39, R41, R42,
RES., CHIP, 0Ω, 1%
R45, R46, R47, R48, R49, R50, R52, R56, R57,
R60, R62, R85, R124–R127, R7, R22, R44, R54,
R65, R66, R68, R104
0603
VISHAY, CRCW06030000Z0EA
22
4
R12, R13, R14, R15
RES SENSE., CHIP, 0Ω, 1W2512
VISHAY WSL251200000ZEA9
23
1
R25
RES., CHIP, 7.32k, 1%
0603
NIC NRC06F7321TRF
24
1
R28
RES., CHIP, 16.2k, 1%
0603
NIC NRC06F1622TRF
25
1
R29
RES., CHIP, 17.4k, 1%
0603
NIC NRC06F1742TRF
26
2
R33, R35
RES., CHIP, 5.76k, 1%,
0603
NIC NRC06F5761TRF
27
1
R51
RES., CHIP, 90.9k, 1%
0603
NIC NRC06F9092TRF
28
1
R3
RES., CHIP, 4.99k, 1%
0603
VISHAY CRCW06034K99FKEA
INFINEON BSC050NE3LS G
INFINEON BSC010NE2LSI
29
8
R6, R21, R43, R53, R102, R107, R111, R117
RES., CHIP, 1.4k, 1%
0603
VISHAY CRCW06031K40FKEA
30
1
R16
RES., CHIP, 3.01k, 1%
0603
NIC NRC06F3011TRF
31
4
R75, R106, R110, R116,
RES SENSE., CHIP, 0Ω, 1W2512
VISHAY WSL251200000ZEA9
32
1
U1
IC, LTC3880EUJ, QFN40P 6mm x 6mm
LTC., LTC3880EUJ
33
1
U2
IC, LTC3870EUF, QFN28P 4mm x 5mm
LTC., LTC3870EUFD
DC2089A-B Additional Circuit Components
1
1
C70
CAP., X5R, 100nF,25V, 10% 0603
AVX 06033C104KAT2A
2
1
C73
CAP., X5R, 4.7µF,16V, 10% 0603
TDK C1608X5R1C475K
3
0
C13, C14, C50, C51, C66, C67
CAP, POSCAP OPT
4
0
C20
CAP, OPT0603
D3L
5
2
C71, C72
CAP., X5R, 10nF,16V, 10%, 0603
AVX 0603YC103KAT2A
6
3
C74, C78, C79
CAP., X5R, 1µF, 16V, 10%, 1206
AVX 1206YD105KAT2A
7
2
C77, C82
CAP., X5R, 2.2µF,50V, 10%, 0805
MURATA GRM21BR61H225KA73L
8
1
C80
CAP., NPO, 150pF, 6.3V0603
AVX 06036A151JAT2A
9
1
C81
CAP., X7R, 1µF, 16V, 10%, 0805
MURATA GRM21BR71C105KA01L
10
1
D5
LED RED S-GW TYPE SMD
ROHM SML-0110VTT86
11
2
D6, D7
LED GREEN S-GW TYPE SMD
ROHM SML-010FTT86L
12
0
D8, D9
LED OPT SOD-323
OPT
13
0
Q2, Q4, Q5, Q8, Q11, Q14, Q16, Q17
XSTR, OPT
14
2
Q19, Q20
MOSFET P-CH 20V 0.58A SOT-23
VISHAY TP0101K-T1-E3
LFPAK
OPT
15
2
Q21, Q22
MOSFET N-CH 60V 115MA SOT-23
FAIRCHILD 2N7002A
16
1
Q23
MOSFET SPEED SRS 30V 30A LFPAK
RENESAS, RJK0305DPB-00#J0
17
1
R88
RES., CHIP, 2Ω, 1%
0603
YAGEO, RC0603FR-072RL
18
2
R71, R93
RES., CHIP, 10k, 1%
0603
NIC NRC06F1002TRF
19
3
R64, R67, R70
RES., CHIP, 0Ω, 1%
0603
VISHAY, CRCW06030000Z0EA
10
dc2089af
DEMO MANUAL
DC2089A-A/DC2089A-B
Parts List
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
20
0
R9, R11, R19, R30, R36, R38, R55, R58, R59,
R61, R63, R69, R80, R81, R100, R101, R113,
R114, R119, R120, R121, R74, R105, R109,
R115, R103, R108, R112, R118
RES., OPT 0603
OPT
21
1
R72
RES., CHIP, 127, 1%
0603
NIC NRC06F1270TRF
22
1
R73
RES., CHIP, 15.8k, 1%
0603
NIC NRC06F1582TRF
23
3
R76, R77, R96
RES., CHIP, 10, 1%
0603
NIC NRC06F10R0TRF
24
2
R78, R79
RES., CHIP, 200, 1%
0603
NIC NRC06F2000TRF
25
2
R82, R83
RES., CHIP, 4.99k, 1%
0603
VISHAY CRCW06034K99FKEA
26
1
R84
RES., CHIP, 100k, 1%
0603
NIC NRC06F1003TRF
27
1
R86
RES., CHIP, 0.001, 1%, 1W2010
NIC NCSR150FR001DTR
28
0
R87
RES., CHIP, OPT2010
OPT
29
2
R89, R95
RES., CHIP, 20k, 1%
0603
NIC NRC06F2002TRF
30
1
R90
RES., CHIP, 154k, 1%
0603
NIC NRC06F1543TRF
31
1
R91
RES., CHIP, 1M, 5%
0603
VISHAY CRCW06031M00JNEA
32
1
R92
RES., CHIP, 3.3, 1%
0603
VISHAY CRCW06033R30FKEA
33
1
R94
RES., CHIP, 82.5, 5%
0603
VISHAY CRCW060382R5FKEA
34
1
R97
RES., CHIP, 681k, 1%
0603
VISHAY CRCW0603681KFEA
2010
VISHAY, WSL2010R010FEA
35
1
R98
RES, VARIABLE 5k
36
1
R99
RES., CHIP, 0.01, 1%
BOURNS 3386P-1-502-LF
37
1
U1
IC, LTC3880EUJ, QFN40P 6mm x 6mm
38
1
U2
IC, LTC3870EUF, QFN28P 4mm x 5mm
LTC., LTC3870EUFD
39
1
U3
IC, 24LC05-I/ST
MICROCHIP 24LC025-I/ST
40
1
U4
IC, LT1129CS8-5
SO8NB
41
1
U5
IC, LTC6992-1
S6-TSOT23 LINEAR TECHNOLOGY. LTC6992IS6-1
42
1
U6
IC, LT1803-5
S5-TSOT23 LINEAR TECHNOLOGY. LT1803IS5
TSSOP-8_4.4mm
LTC., LTC3880EUJ
LINEAR TECHNOLOGY, LT1129CS8-5
DC2089A-B Hardware
1
21
E1–E21
TURRET, .062"
MILL-MAX, 2308-2-00-80-00-00-07-0
2
4
JP1, JP3, JP4, JP5
HEADER, 1X3 2mm
SAMTEC TMM-103-02-L-S
3
4
XJP1, XJP3, XJP4, XJP5
SHUNT, 2mm
SAMTEC 2SN-BK-G
4
6
J1–J6
STUD, TESTPIN
PEM KFH-032-10
5
12
J1–J6 (X2)
NUT, BRASS 10-32
ANY #10-32
6
6
J1–J6
RING, LUG #10
KEYSTONE #10
7
6
J1–J6
WASHER, TIN PLATED BRASS
ANY #10
8
1
J7
HEADER 2X7 2mm, RA (M)
MOLEX, 87760-1416
9
1
J8
HEADER, 2X6 2mm STR DL PCB
FCI 98414-G06-12ULF
10
1
J9
SOCKET 2X7 2mm RA (F)
SULLINS, NPPN072FJFN-RC
11
3
J10, J11, J12
CONN, BNC, 5PINS
CONNEX, 112404
12
2
SW1, SW2
SWITCH, SUBMINATURE SLIDE
C&K JS202011CQN
dc2089af
11
A
B
C
D
SYNC
SDA
SCL
E2
J2
J1
E1
Q7
Q10
R10
0
VIN
0
OPT
0
R39
OPT
R38
R37
5.76K
24.9K
R36
R35
5.76K
24.9K
R34
R33
17.4K
16.2K
R32
R29
R28
VOUT1_TRIM
VOUT0_TRIM
VOUT1_CFG
VOUT0_CFG
FREQ_CFG
9
17
16
24
23
14
15
40
28
5
26
11
8
10
R5
10K
FREQ_CFG
ASEL
SC
WP
RUN0
RUN1
TSNS0
TSNS1
ITH0
ITH1
ALERT
SYNC
SDA
SCL
C5
100nF
5
1. ALL RESISTORS AND CAPACITORS ARE 0603.
NOTE: UNLESS OTHERWISE SPECIFIED
VDD25
VDD25
VDD25
VDD25
VDD25
R25
7.32K
R23
24.9K
VDD25
WP
RUN0
RUN1
ITH0
VDD33
R20
10K
SC
*
*
R16
C21
2
R1
R3
R4
4.99k 10K
C2
330uF
16V
SVP
R2
10K
R19
OPT
C23
100pF
R18
0
+
VDD33
+ C1
330uF
16V
SVP
ADDRESS: 0x45h
C36
10nF
C27
10nF
C20
OPT
R11
OPT
MMBT3906LT1G
TSNS0
MMBT3906LT1G
TSNS1
C22
100pF
ALERTB
GND
GND
VIN
7V-14V
VIN
VOUT0_CFG
18
33
VDD25
4
VDD33
4
*
VSENSE0-
VSENSE0+
ISNS0-
ISNS0+
BG0
SW0
BOOST0
TG0
VSENSE1
ISNS1-
ISNS1+
BG1
SW1
GPIO1B
2
INTVCC
CMDSH-3-TR
C26
100nF
D2
C18
100nF
INTVCC
1uF
1.4K
OPT
3
4
4
4
4
3
4
4
Q3
SW1
Q1
*
Q6
BSC050NE3LS
C17
*
R102
*
R65
BSC010NE2LSI
C19
*
4
4
BSC050NE3LS
Q9
*
C37
R117
R104
*
*
*
BSC010NE2LSI
C38
*
C25
10uF
1210
*
R6
L1
C3
10uF
1210
L2
*
C24
10uF
1210
R21
*
VIN
*
R7
C4
10uF
1210
0 1W
0.001 1W
100
1.4K
100
0
CUSTOMER NOTICE
OPT
0
OPT
0
R16
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
L1-L4
C10
YI S.
LT
C29
R13
0
330uF
D3L
+ C11
2
R15
0
330uF
D3L
+ C34
0
R85
OPT
R9
TECHNOLOGY
0
R26
INTVCC
VSNS0-
GND
VOUT1
MAX 3.3V
MAX 20A
E8
E7
E6
GND
INTVCC
VOUT0-
VOUT0+
GND
MAX 3.3V
MAX 60A
VOUT0
VOUT1-
VOUT1+
E5
J6
VSNS0+
330uF
D3L
+ C31
J5
E4
DATE
07-16-14
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
OPT
330uF
D3L
+ C30
J4
E3
J3
VSNS1
VOUT0
100uF
1210
C16
VOUT1
YI S.
APPROVED
VSNS0+
330uF
D3L
R24
0
C15
100uF
1210
+ C35
R30
OPT
D3L
+ C14
EXTVCC
330uF
D3L
+ C33
VOUT0
330uF
D3L
1
DATE:
N/A
SIZE
1
SHEET 1
LTC3880EUJ + LTC3870IUFD
DEMO CIRCUIT 2089A
Wednesday, July 16, 2014
IC NO.
OF 4
2
REV.
POLY-PHASE DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
TITLE: SCHEMATIC
OPT
D3L
+ C13
PRODUCTION
DESCRIPTION
REVISION HISTORY
VOUT1
+ C32
R14
0
330uF
D3L
+ C12
REV
100uF 100uF
1210
1210
C28
R12
0
100uF
1210
__
ECO
0.22uH IHLP5050FD-01-022
SCALE = NONE
2
*
R118
WE 744301025
R115
*
*
2512
R116
C9
100uF
1210
APPROVALS
3.01K
3.48K
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
APP ENG.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
0
OPT
*
R22
*
R103
R74
*
*
2512
R75
R7,R22 R74,R105 R75,R106 R65,R66 R102,R107 R103,R108
R44,R54 R109,R115 R110,R116 R68,R104 R111,R117 R112,R118
Q8
OPT
Q5
OPT
Q4
OPT
Q2
OPT
VIN
2
Figure 7. DC2089A Demo Circuit Schematic, Sheet 1 of 4
0.22uF
2200pF
"B" VERSION DCR SENSE
OPT
C19,C38 C17,C37 R6,R21
C55,C68 C52,C69 R43,R53
1
1000pF
C21
VDD33
0
R17
R125
0
0
R8
2
CMDSH-3-TR
1500pF
10K
R31
10K
R27
2
1
7
6
36
39
37
38
27
4
3
32
29
31
30
R124
0
1
D1
"A" VERSION R SENSE
CONFIGURATION
SGND AND PGND
CONNECTED AT
A SINGLE NODE
NEAR U1
TG1
C8
1uF
BOOST1
GPIO0B
C7
1uF
U1
LTC3880EUJ
INTVCC
C6
4.7uF
VOUT1_CFG
19
VTRIM0_CFG
20
35
VIN
VTRIM1_CFG
21
INTVCC
25
VDD33
22
VDD25
GND
41
PGND
34
GPIO0
12
GPIO1
13
5
1
2
3
5
1
2
3
5
1
2
3
5
1
2
3
5
1
2
3
5
1
2
3
5
1
2
3
5
12
1
2
3
5
A
B
C
D
DEMO MANUAL
DC2089A-A/DC2089A-B
Schematic Diagram
dc2089af
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
D
MODE1
MODE0
SYNC
E19
E10
E18
E17
ITH0
RUN0
ITH0
GPIO0B
GPIO0B
RUN0
GND
E9
5
MODE1
MODE0
PHASMD
ILIM
EXTVCC
0
OPT
0
OPT
R61
OPT
R101
OPT
0
R62
R59
R60
OPT
R100
R57
R58
OPT
12
11
27
10
9
25
8
5
28
26
1
4
0
C56
47pF
C54
47pF
2
R55
0
R52
0
R48
0
R45
VIN
R40
R56
0
R49
0
R47
0
R46
0
R41
90.9K
R51
PHASMD
ILIM
GPIO0B
MODE1
MODE0
C39
4.7uF
PHASMD
SYNC
FREQ
ILIM
ITH1
FAULT1
MODE1
RUN1
ITH0
FAULT0
MODE0
RUN0
C42
100nF
20
INTVCC_2
INTVCC_2
INTVCC_2
INTVCC_2
4
ISENSE1-
ISENSE1+
BG1
SW1
BOOST1
TG1
ISENSE0-
ISENSE0+
BG0
SW0
BOOST0
TG0
GPIO1B
6
7
16
14
15
13
3
2
21
23
22
24
C43
4.7uF
INTVCC_2
4
U2
LTC3870EUFD
VIN
18
EXTVCC
17
INTVCC
EXTVCC
GND
29
PGND
19
1
1
2
2
100nF
CMDSH-3-TR
C57
D4
100nF
C53
CMDSH-3-TR
D3
INTVCC_2
INTVCC_2
3
Q17
OPT
Q16
OPT
Q14
OPT
Q13
*
*
Q15
BSC050NE3LS
C52
*
R66
R107
Q18
*
C68
*
C69
*
*
R111
R68
BSC010NE2LSI
4
4
*
C55
BSC010NE2LSI
4
4
Q12
BSC050NE3LS
*
L4
R53
*
*
*
C58
10uF
1210
R43
L3
C40
10uF
1210
*
R54
C59
10uF
1210
*
R44
C41
10uF
1210
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
*
*
R109
2512
R110
*
R105
*
2512
R106
2
SCALE = NONE
YI S.
LT
APPROVALS
VIN
VIN
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
APP ENG.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
CUSTOMER NOTICE
4
4
4
4
Q11
OPT
2
Figure 8. DC2089A Demo Circuit Schematic, Sheet 2 of 4
0
R50
R127
0
0
R42
R126
0
3
5
1
2
3
5
1
2
3
5
1
2
3
5
1
2
3
5
1
2
3
5
1
2
3
5
1
2
3
5
1
2
3
5
C61
100uF
1210
C60
100uF
1210
330uF
D3L
+ C64
330uF
D3L
+ C48
TECHNOLOGY
330uF
D3L
+ C63
330uF
D3L
+ C47
OPT
D3L
+ C67
OPT
D3L
+ C51
C46
100uF
1210
C62
C49
100uF
1210
100uF
1210
C65
VOUT0
100uF
1210
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
OPT
D3L
+ C66
OPT
D3L
+ C50
VOUT0
DATE:
N/A
SIZE
1
LTC3880EUJ + LTC3870IUFD
DEMO CIRCUIT 2089A
Wednesday, July 16, 2014
IC NO.
SHEET 2
OF 4
2
REV.
POLY-PHASE DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
TITLE: SCHEMATIC
*
R112
*
R108
C45
100uF
1210
C44
100uF
1210
1
A
B
C
D
DEMO MANUAL
DC2089A-A/DC2089A-B
Schematic Diagram
dc2089af
13
A
B
C
ALERTB
RUN0
GPIO0B
1
1
R72
127
5
D5
ALERT
RED
TP0101K
Q20
C
NC
RUN0-RUN1
3V3
3
1
C
NC
GPIO0-GPIO1
JP4
3
SDA
SCL
WP
VCC
U3
24LC025-I/ST
VSS
A2
A1
A0
JP3
4
3
2
1
AUXP
SDA
GND
SCL
LGKPWR
ALERTB
GPIO_1
OUTEN_0
OUTEN_1
GND
AUXSCL
AUXSDA
J8
TO DC1613A
GND
E21
2
2
100nF
C70
3V3
EESCL
EESDA
6
5
VIN
3V3
RUN1
GPIO1B
EEWP
7
8 AUXVCC
1
2
3
4
5
6
7
8
9
10
11
12
3
10K
R71
TP0101K
Q19
R73
15.8K
2
VDD33
R82
4.99K
GPIO1B
R83
4.99K
3V3
ALERTB
1
3
2
4
Q21
2N7002A
D6
GPIO1B
GRN
R78
200
E11
ALERTB
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
J7
SCL
E12
GPIO0B
OPT
R119
OPT
R80
3V3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
E13
Q22
2N7002A
D7
GPIO0B
GRN
R79
200
SCL
SHARE_CLK
VIN
3V3
3
R114
OPT
1206
R120
OPT
SYNC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
J9
VIN
OFF
ON
JP1
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
OFF
5
ON
R84
100K
2
SCALE = NONE
YI S.
LT
APPROVALS
2
R113
OPT
SW2
RUN1
D9
OPT
PULSE
GENERATOR
0
R64
OPT
R63
DEMO HEADER (F)
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
OPT
R69
0
R67
CUSTOMER NOTICE
R70
0
E14
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
APP ENG.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
R121
OPT
SYNC
SHARE_CLK
E20
Figure 9. DC2089A Demo Circuit Schematic, Sheet 3 of 4
1
DEMO HEADER (M)
SDA
SDA
ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN
4
4
1
6
3
D
1
2
3
2
1
2
1
3
2
2
1
3
2
3
1
8
7
6
5
VIN
NC
GND
OUTPUT
SENSE/ADJ
U4
OFF
4
1
2
3
2
C71
10nF
R76
10
R123
10K
VDD33
+5V
C73
4.7uF
RUN1
RUN0
GPIO0B
GPIO1B
1
DATE:
N/A
SIZE
1
SHEET 3
LTC3880EUJ + LTC3870IUFD
DEMO CIRCUIT 2089A
Wednesday, July 16, 2014
IC NO.
OF 4
2
REV.
POLY-PHASE DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
R122
10K
VDD33
TECHNOLOGY
LT1129CS8-5
GND
GND
SHDN
C72
10nF
5
ON
SW1
RUN0
TITLE: SCHEMATIC
C74
1uF
2
R77
10
D8
OPT
R81
OPT
4
1
14
6
3
5
A
B
C
D
DEMO MANUAL
DC2089A-A/DC2089A-B
Schematic Diagram
dc2089af
A
B
C
5
R95
20K
154K
R90
3
2
1
DIV
V+
OUT
70Hz, 3% Duty Cycle
SET
GND
MOD
LTC6992-1
4
5
6
R97
681K
R91
1M
4
LOAD
STEP
C79
1uF
1206
+5V
R98
5K
R96
10
1%
R89
20K
3
2
5
-IN
VOUT
U6
LT1803IS5
+IN
V-
V+
4
1
3
1
3
INT EXT
R93
10K
4
CUSTOMER NOTICE
82.5
R94
3.3
R92
R99
0.01
2010
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
VOUT1
VOUT0
2
SCALE = NONE
YI S.
LT
APPROVALS
RJK0305DPB
Q23
OPT
2010
2010
R87
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
APP ENG.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
C80
150pF
JP5
INT / EXT PULSE
R88
2
R86
0.001
2
Figure 10. DC2089A Demo Circuit Schematic, Sheet 4 of 4
C78
1uF
1206
+5V
DYNAMIC LOAD CIRCUIT FOR DEMO ONLY
2
3
5
1
2
3
U5
4
1
1
1
J10
J11
J12
E16
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
SHEET 4
LTC3880EUJ + LTC3870IUFD
DEMO CIRCUIT 2089A
Wednesday, July 16, 2014
IC NO.
OF 4
2
REV.
POLY-PHASE DC/DC CONVERTER WITH POWER SYSTEM MANAGEMENT
TECHNOLOGY
VOUT1
GND
IOUT
TST
VOUT0
EXT PULSE
TITLE: SCHEMATIC
C82
2.2uF
0805
VOUT1
C81
1uF
0805
C77
2.2uF
0805
VOUT0
E15
2
3
4
5
2
3
4
5
2
3
4
5
D
5
A
B
C
D
DEMO MANUAL
DC2089A-A/DC2089A-B
Schematic Diagram
15
dc2089af
DEMO MANUAL
DC2089A-A/DC2089A-B
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:
This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT
OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety
measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union
directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.
If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date
of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU
OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR
ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all
appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or
agency certified (FCC, UL, CE, etc.).
No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.
Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and
observe good laboratory practice standards. Common sense is encouraged.
This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
16 Linear Technology Corporation
dc2089af
LT 0714 • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2014
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