Linear Analog Devices DC2605A Quick setup guide

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dc2605af
DEMO MANUAL DC2605A
DESCRIPTION
LTC3884ERHE-1, LTC3874EUF-1
Polyphase Single 120A Output Synchronous Buck
Converter with Power System Management
Demonstration circuit 2605A is a high efficiency, high
density, single-output buck converter with 7V to 14V input
range. The output voltage is adjustable from 0.5V to 1.5V,
and can supply up to 120A of load current with a 1V out-
put. The demo board features the LTC
®
3884-1paired with
a slave controller LTC3874-1 to provide a 4-phase buck
converter solution. The LTC3884-1 is a dual output poly
phase step-down controller for ultra-low DCR sensing
with digital power system management. The LTC
®
3874-1
is a dual PolyPhase
®
current mode synchronous step-
down slave controller. Please see LTC3884-1 data sheet
for more detailed information.
DC2605A 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
All registered trademarks and trademarks are the property of their respective owners.
PERFORMANCE SUMMARY
system management features of the part, download the
GUI software LTpowerPlay
®
onto your PC and use LTC’s
I2C/SMBus/PMBus dongle DC1613A to connect to the
board. LTpowerPlay allows the user to reconfigure the part
on the fly and store the configuration 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 GUI for LTC3884-1 demo manual.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2605A
Specifications are at TA= 25°C
PARAMETER CONDITIONS VALUE
Input Voltage Range 7V to 14V
Output Voltage, VOUT VIN = 7-14V, Single Output, IOUT = 0A to 120A Default: 1V
Maximum Output Current, IOUT VIN = 7-14V, Single Output, VOUT = 0.5V to 1.5V 120A
Typical Efficiency VIN = 12V, Single Output, VOUT = 1.0V, 120A Load 90.2%
Peak Efficiency VIN = 12V, Single Output, VOUT = 1.0V, 70A Load 92.2%
Default Switching Frequency 425kHz

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DEMO MANUAL DC2605A
QUICK START PROCEDURE
Demonstration circuit 2605A is easy to set up to evaluate
the performance of the LTC3884-1. Refer to Figure 1 for
the proper measurement equipment setup and follow the
procedure below.
1. With power off, connect the input power supply to VIN
(7V-14V) and GND (input return).
2. Connect the output loads between VOUT and GND (Ini-
tial load: no load). Refer to Figure 1.
3. Connect the DVMs to the input and output.
4. Check the default jumper/switch position: JP1:OFF;
JP2:LOWDCR; JP3: RANGE_LOW; JP4:ON; JP5:EXT;
SW2: OFF.
5. Turn on the input power supply and adjust voltage to
12V.
NOTE:Make sure that the input voltage does not
exceed 14V.
6. Turn on the switch: SW2: ON.
7. Check for the proper output voltages from V
OUT+
to
VOUT–.
8. Once the proper output voltage is established, adjust
the loads within the operating range and observe the
output voltage regulation, ripple voltage and other
parameters.
9. Connect the dongle and control the output voltage from
the GUI. See “LTpowerPlay Quick Start Guide”session
for details.
Note:When measuring the output or input voltage rip-
ple, do not use the long ground lead on the oscilloscope
probe. See Figure 2 for the proper scope probe technique.
Short, stiff leads need to be soldered to the (+) and (–)
terminals of an output capacitor. The probe’s ground ring
needs to touch the (–) lead and the probe tip needs to
touch the (+) lead.
Connecting a PC to DC2605A
You can use a PC to reconfigure the power management
features of the LTC3884-1 such as:nominal VOUT, mar-
gin set points, OV/UV limits, temperature fault limits,
sequencing parameters, the fault log, fault responses and
other functionality. The DC1613A dongle may be plugged
when VIN is present.

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DEMO MANUAL DC2605A
QUICK START PROCEDURE
+–
+–
1mΩ
VOUT
VIN
7V TO 14V
LOAD
(120A)
+–
1mΩ
+
–
+
–
DC2605A F01
Figure 1. Proper Measurement Equipment Setup
Figure 2. Measuring Output Voltage Ripple
+ –
VOUT GND
COUT

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DEMO MANUAL DC2605A
INPUT POWER SUPPLY
LOAD (UP TO 120A)
LTC3884-1 DEMO BOARD
DC2605A
USB TO I2C/PMBus DONGLE
DC1613A
USB CABLE VIN
VOUT
CONNECTOR
12-PIN
(J14)
DC2605A F03
QUICK START PROCEDURE
Figure 3. Demo Setup with PC
Figure 4. Efficiency vs Load Current at
VIN = 12V, VOUT = 1V, fSW = 425kHz
Figure 5. Transient Response at VIN = 12V,
VOUT = 1V, fSW = 425kHz
75
80
85
90
95
0 20 40 60 80 100 120
EFFICIENCY (%)
LOAD CURRENT (A)
DC2605A F04
DC2605A F05
VOUT MEASURED AT BNC J11 (20MHz BW) (20mV/DIV)
0A TO 30A LOAD STEP

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DEMO MANUAL DC2605A
QUICK START PROCEDURE
Figure 6. Current Sharing vs Load Current at VIN = 12V, VOUT = 1V, fSW = 425kHz
0
10
5
15
25
20
35
30
0 20 40 60 80 100 120
LOAD CURRENT PER PHASE (A)
TOTAL LOAD CURRENT (A)
DC2605A F06
PHASE #4
PHASE #3
PHASE #2
PHASE #1
Figure 7. Thermal Performance at VIN = 12V, VOUT = 1V, IOUT = 120A, TA= 23°C, No Forced Airflow

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DEMO MANUAL DC2605A
LTpowerPlay is a powerful Windows based development
environment that supports Linear Technology power sys-
tem management ICs, including the LTM4676, LTC3880,
LTC3883, LTC3884/LTC3884-1, LTC2974 and 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 pres-
ent) 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 manage-ment 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 LTM4676, the LTC3880, LTC3884
and the LTC3883’s 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 LTpow-
erPlay menu.
LTPOWERPLAY SOFTWARE GUI
Figure 8. LTpowerPlay Main Interface

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DEMO MANUAL DC2605A
LTPOWERPLAY QUICK START PROCEDURE
The following procedure describes how to use LTpower-
Play to monitor and change the settings of LTC3884-1.
1. Download and install the LTPowerPlay GUI:
http://linear.com/ltpowerplay
2. Launch the LTpowerPlay GUI.
a. The GUI should automatically identify the DC2605A.
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 LTC3884-1 is
communicating:
c. In the Toolbar, click the “R” (RAM to PC) icon to read the
RAM from the LTC3884-1. This reads the configuration
from the RAM of LTC3884-1 and loads it into the GUI.
d. If you want to change the output voltage to a different
value, like 1.2V. In the Config tab, type in 1.2 in the
VOUT_COMMAND box, like this:

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dc2605af
DEMO MANUAL DC2605A
LTPOWERPLAY QUICK START PROCEDURE
Then, click the “W” (PC to RAM) icon to write these regis-
ter values to the LTC3884-1. After finishing this step, you
will see the output voltage will change to 1.2V.
If the write is successful, you will see the following mes-
sage:
e. You can save the changes into the NVM. In the tool bar,
click “RAM to NVM” button, as following
f. Save the demo board configuration to a (*.proj) file.
Click the Save icon and save the file with a user file-
name.

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DEMO MANUAL DC2605A
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 16 CIN1, CIN2, CIN3, CIN4, CIN5, CIN6,
CIN7, CIN8, CIN9, CIN10, CIN11, CIN12,
CIN13, CIN14, CIN15, CIN16
CAP. 22µF X7R 25V 10% 1210 MURATA GRM32ER71E226KE15K
2 17 COUT1, COUT2, COUT5, COUT6,
COUT10, COUT11, COUT12, COUT16,
COUT19, COUT20, COUT24, COUT25,
C30, C34, C35, COUT41, C44
CAP. 100µF X5R 6.3V 20% 1210 AVX, 12106D107MAT2A
3 8 COUT3, COUT4, COUT7, COUT8,
COUT9, COUT13, COUT14, COUT15
CAP. 470µF 20% 2.5V TANT. POLYMER PANASONIC ETPF470M5H
4 5 C7, C19, COUT26, C41, C42 CAP. 1µF X5R 25V 20% 0603 AVX 06033D105MAT2A
5 1 C1 CAP. 2.2µF X5R 6.3V 20% 0603 TDK C1608X5R0J225M
6 4 C2, C52, C53, C54 CAP. 270µF 20% 16V OSCON PANASONIC 16SVPC270M
7 1 C3 CAP. 2.2µF X7S 16V 20% 0603 MURATA, GRM188C71C225KE11D
8 4 C4, C6, C18, C20 CAP. 4.7µF X5R 10V 10% 0603 AVX 0603ZD475KAT2A
9 4 C9, C16, C21, C33 CAP. 220nF X7R 25V 10% 0603 TDK C1608X7R1E224K
10 1 C12 CAP. 330pF C0G 50V 5% 0603 MURATA GRM1885C1H331JA01D
11 1 C13 CAP. 6.8nF X7R 50V 10% 0603 MURATA GRM188R71H682KA01B
12 3 C14, C17, C28 CAP. 10nF X7R 25V 10% 0603 AVX 06033C103KAT2A
13 1 C23 CAP. 22pF C0G 50V 5% C0G 0603 MURATA GRM1885C1H220JA01B
14 8 C29, C181, C186, C188, C192, C194,
C198, C200
CAP. 0.47µF X5R 10V 10% 0402 MURATA GRM155R61A474KE15D
15 1 C31 CAP. 10µF X7R 16V 10% 1210 MURATA GRM32DR71C106KA01L
16 2 C39, C50 CAP. 100nF X7R 16V 20% 0603 AVX 0603YC104MAT2A
17 1 C40 CAP. 150pF X7R 50V 10% 0603 AVX 06035C151KAT2A
18 1 C43 CAP. 220pF X7R 50V 10% 0603 AVX 06035C221KAT2A
19 1 C49 CAP. 47nF X7R 25V 10% 0603 AVX 06033C473KAT2A
20 8 C75, C185, C190, C191, C196, C197,
C202, C203
CAP. 4.7µF X5R 10V 10% 0402 TDK C1005X5R1A475K
21 4 C184, C189, C195, C201 CAP. 330pF X7R 50V 10% 0402 AVX 04025C331KAT2A
22 4 C204, C205, C206, C207 CAP. 1µF X5R 10V 10% 0402 TDK C1005X5R1A105K
23 2 D6, D9 LED 0603 GREEN WURTH ELEKTRONIK
150060GS75000
24 1 D7 LED 0603 RED WURTH ELEKTRONIK
150060SS75000
25 1 D13 DIODE ULTRA LOW SCHOTTKY RECTIEIER NEXPERIA PMEG2005AEL,315
26 4 L1, L2, L3, L4 Power inductor EATON., FP1007R3-R22-R
27 1 L5 IND 68µH Shielded Inductor 1.6A 201 mΩ SUMIDA, CDRH105RNP-680NC
28 2 Q9, Q10 XSTR 40V PNP SMALL SIGNAL TRANSISTOR IN
SOT323
DIODES INC, MMST3906-7-F
28 2 Q9, Q10 XSTR 40V PNP SMALL SIGNAL TRANSISTOR IN
SOT323
DIODES INC, MMST3906-7-F
29 2 Q20, Q29 XSTR P-CHANNEL ENHANCEMENT MODE MOSFET DIODES INC, DMP3130L-7
30 2 Q21, Q26 XSTR N-CHANNEL TRANSISTOR FAIRCHILD 2N7002K
31 2 Q23, Q24 XSTR MOSFET N-CHANNEL 40V VISHAY SUD50N04-8M8P-4GE3

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DEMO MANUAL DC2605A
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
32 1 R1 RES. 0.001Ω 1% 1W 2512 VISHAY WSL25121L000FEA
33 1 R2 RES. 1Ω 1% 1/10W 0603 VISHAY CRCW06031R0FKEA
34 15 R3, R4, R30, R51, R52, R56, R87, R91,
R113, R114, R117, R127, R137, R138,
R148
RES. 0Ω 1/10W 0603 VISHAY CRCW06030000Z0EA
35 3 R5, R16, R70 RES. 10Ω 1% 1/10W 0603 VISHAY CRCW060310R0FKEA
36 7 R6, R8, R10, R29, R34, R98, R123 RES. 10kΩ 1% 1/10W 0603 VISHAY CRCW060310K0FKEA
37 3 R9, R128, R150 RES. 4.99kΩ 1% 1/10W 0603 VISHAY CRCW06034K99FKEA
38 3 R11, R12, R13 RES. 1kΩ 1% 1/10W 0603 VISHAY CRCW06031K00FKEA
39 4 R14, R20, R135, R143 RES. 649Ω 1% 1/10W 0603 VISHAY CRCW0603649RFKEA
40 24 R43, R124, R129, R162, R164, R171,
R173, R175, R176, R177, R186, R188,
R190, R191, R192, R202, R203, R205,
R206, R207, R212, R214, R216, R218
RES. 0Ω 1/10W 0402 VISHAY CRCW04020000Z0EA
41 2 R49, R89 RES. 2Ω 1% 1/10W 0603 VISHAY CRCW06032R0FKEA
42 1 R55 RES. 100KΩ 5% 1/10W 0603 VISHAY CRCW0603100KJNEA
43 3 R95, R96, R107 RES. 20kΩ 1% 1/10W 0603 VISHAY CRCW060320K0FKEA
44 2 R79, R130 RES. 402Ω 1% 1/10W 0603 VISHAY CRCW0603402RFKTA
45 1 R81 RES. 255Ω 1% 1/10W 0603 VISHAY CRCW0603255RFKEA
46 1 R85 RES. 27.4Ω 1% 2512 VISHAY CRCW06033R30FKEA
47 1 R92 RES. 3.3Ω 1% 1/10W 0603 VISHAY CRCW06033R30FKEA
48 1 R93 RES. 154kΩ 1% 1/10W 0603 VISHAY CRCW0603154KFKEA
49 1 R94 RES. 1MΩ 5% 1/10W 0603 VISHAY CRCW06031M00JNEA
50 1 R97 RES. 681kΩ 1% 1/10W 0603 VISHAY CRCW0603681KFKEA
51 1 R99 RES. 301Ω 5% 1/10W 0603 VISHAY CRCW0603301RFKEA
52 1 R100 RES. 82.5Ω 5% 1/10W 0603 VISHAY CRCW060382R5FKEA
53 2 R101, R102 RES. 0.01Ω 1%2512 VISHAY WSL2512R0100FEA
54 1 R103 RES. VARIABLE 5K BOURNS 3386P-1-502-LF
55 1 R104 RES. 1.21kΩ 1% 1/10W 0603 VISHAY CRCW06031K21FKEA
56 2 R105, R106 RES. 118kΩ 1% 1/10W 0603 VISHAY CRCW0603118KFKEA
57 4 R147 RES. 15.8kΩ 1% 1/10W 0603 VISHAY CRCW060315K8FKEA
58 4 R163, R172, R187, R201 RES. 10kΩ 1% 1/10W 0402 VISHAY CRCW040210K0FKED
59 1 U1 IC. Dual Output PolyPhase Step-Down Controller with
Sub-Milliohm DCR Sensing and Digital Power System
Management
LINEAR TECH.LTC3884ERHE-
1#10GV-1PBF-ES
60 1 U2 IC. PolyPhase Step-Down Synchronous Slave Controller
with Sub-Milliohm DCR Sensing
LINEAR TECH.LTC3874EUF-1
61 1 U4 IC. High Efficiency, 65V 500mA Synchronous
Step-Down Converter
LINEAR TECH. LTC3630EMSE#PBF
62 1 U5 IC. Voltage-Controlled Pulse Width Modulator LINEAR TECH. LTC6992IS6-1#PBF
63 1 U6 IC. Single 100V/µs,85MHz, Rail-to-Rail Input and
Output Op Amps
LINEAR TECH. LT1803IS5#PBF
64 1 U8 IC. SERIAL EEPROM MICROCHIP 24LC024-I/ST
65 4 U15, U16, U17, U18 DrMOS Fairchild FDMF3170

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DEMO MANUAL DC2605A
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Additional Demo Board Circuit Components
1 0 COUT17, COUT18, COUT22, COUT23,
COUT35, COUT36, COUT37, COUT38,
COUT39, COUT40
CAP., OPTION
2 0 C5, C51, C183, C187, C193, C199 CAP., OPTION
3 0 D11 DIODE., SOD323 OPTIONAL
4 0 R119, R120, R125, R160, R161, R167,
R168, R169, R170, R174, R181, R183,
R184, R185, R189, R197, R198, R199,
R200, R204, R209, R211, R213, R215,
R217, R17, R22, R23, R24, R25, R26,
R27, R28, R31, R32, R35, R36, R37,
R38, R87, R122, R134, R136, R141,
R142, R145, R151, R139, R85, R159,
R121, R195, R194, R59
RES. OPTIONAL
Hardware: For Demo Board Only
1 16 E1-E4, E7, E8, E21-E26, E28, E34, E36,
E37
TEST POINT TURRET, 0.094" MTG. HOLE MILL-MAX 2501-2-00-80-00-00-
07-0
2 5 JP1, JP2, JP3, JP4, JP5 CONN. HDR MALE 1×3 2mm THT STR WURTH ELEKTRONIK
62000311121
3 2 J11, J12 CONN. BNC PC MOUNT RECEPT. JACK 50Ω TF-4 POST AMPHENOL CONNEX 112404
4 1 J13 CONN. HEADER 2×7 2mm R/A (F) SULLINS NPPN072FJFN-RC
5 1 J14 HEADER 12PIN 2mm STR DL FCI 98414-G06-12ULF
6 1 J15 CONN. HEADER 2×7 2mm R/A (M) MOLEX 87760-1416
7 1 J16 HEADER 4PIN 2mm STR DL HIROSE DF3A-4P-2DSA
8 1 SW2 SWITCH Slide Switch DPDT Through Hole C&K JS202011CQN
9 5 XJP1 XJP2 XJP3 XJP4 XJP5 CONN. SHUNT FEMALE 2 POS 2mm WURTH ELEKTRONIK
60800213421
10 4 MH1 MH2 MH3 MH4 STANDOFF SNAP ON KEYSTONE 8834
PARTS LIST

12
dc2605af
DEMO MANUAL DC2605A
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D D C C B B A A
7V - 14V
1V/120A
WP ON
OFF
FP1007R3-R22-R
FP1007R3-R22-R
FDMF3170
NOTE:
1. FDMF3170, FDMF3180, TDA21470 AND IR35412 ARE PIN COMPATIBLE
FDMF3170
HZ
ASEL0 ASEL1 VOUT0_CFG VOUT1_CFG
SCL SDA ALERTB
FREQ_CFG
PHASE_CFG
WP1
SHARE_CLK
SYNC
RUN
VIN
VDD25
VOUT VOUT
EXTVCC
INTVCC1
VDD25
VDD33
VIN
VIN1
VIN1
VDD33
VDD33
VDD33
VIN1
VIN1
VDR
VOUT
VDD33 INTVCC1
VDR
VOUT
VDD33
SHARE_CLK
SYNC
ALERTB
RUN
FAULT
ITH
SCL SDA
PGOOD
VSENSE+ VSENSE-
VSENSE- VSENSE+
VSENSE+ VSENSE-
VOUT
SW1
SW1
VREF_CM1
VSENSE+
SW2
SW2
VREF_CM1
VSENSE+
RUN
RUN
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Wednesday, October 18, 2017 14
HIGH EFFICIENCY, POLY-PHASE SYNCHRONOUS BUCK
l _
N/A
LTC3884-1, LTC3874-1
DEMO CIRCUIT 2605A
CONVERTER WITH POWER SYSTEM MANAGEMENT
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Wednesday, October 18, 2017 14
HIGH EFFICIENCY, POLY-PHASE SYNCHRONOUS BUCK
l _
N/A
LTC3884-1, LTC3874-1
DEMO CIRCUIT 2605A
CONVERTER WITH POWER SYSTEM MANAGEMENT
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Wednesday, October 18, 2017 14
HIGH EFFICIENCY, POLY-PHASE SYNCHRONOUS BUCK
l _
N/A
LTC3884-1, LTC3874-1
DEMO CIRCUIT 2605A
CONVERTER WITH POWER SYSTEM MANAGEMENT
REVISION HISTORY
DESCRIPTION DATE APPROVEDECO REV
l _
PRODUCTION2 8-7-17
REVISION HISTORY
DESCRIPTION DATE APPROVEDECO REV
l _
PRODUCTION2 8-7-17
REVISION HISTORY
DESCRIPTION DATE APPROVEDECO REV
l _
PRODUCTION2 8-7-17
R167 OPT
R2 1 1%
R129
0
R169 OPT
R172 10k
U1
LTC3884-1
TG1 36
SW1 35
BOOST1 37
IIN- 48
PGND
42
BOOST0 44
SW0 46
ITH_R0
6
SYNC
12
SCL
13
SDA
14
ALERTB
15
SHARE_CLK
28
RUN0
18
RUN1
19
ITH_R1
31
ITH1
30
TSNS0
11
TSNS1
10
ASEL0
20
ASEL1
21
VDD33 29
ITH0
7
WP
27
VDD25 26
IIN+ 47
FAULT0 16 FAULT1 17
BG1 38
ISENSE1+ 4
VOUT1_CFG
23 VSENSE1- 32
VSENSE1+ 33
ISENSE1- 5
VSENSE0+ 2
ISENSE0- 9
ISENSE0+ 8
BG0 43
VOUT0_CFG
22
VSENSE0- 3
49
GND
FREQ_CFG
24
PHASE_CFG
25
PGOOD1
34
PGOOD0
1
TG0 45
INTVCC 39
VIN 40
EXTVCC
41
GND
50
GND
51
GND
52
GND
53
C7 1.0uF
R164
0
C206 1uF
R176
0
C185 4.7uF
R168 OPT
C188 0.47uF
R124 0
+
COUT3 470uF 2.5V 7343
R20 649
Q9
MMBT3906-AL3-R
SOT-323
R23 OPT
R211 OPT
J2
GND
C6 4.7uF
COUT5 100uF 1210 6.3V
R212 0
R34 10K
R31 OPT
CIN5 22uF 1210
R25
OPT
R214 0
R171
0
R113 0
U16
VCC
3
2
LGND
VOS
1
PGND
5
6
GL
VDRV
4
SW 19
VIN
28
VIN
29
SW 10 SW 12 SW 13 SW 14 SW 15 SW 16 SW 11
PGND 24
VIN
25
VIN
26
VIN
27
VIN
30
31
NC PHASE
32
SW 17 SW 18
BOOST
33
PWM
34
EN
35
36
TOUT/FLT
37
OCSET
IOUT
38
REFIN
39
PGND
40
41
GL
PGND 23 PGND 22 PGND 21 PGND 20
9
PGND
8
PGND
7
PGND
R175
0
C191 4.7uF
+
C52
270uF
16V
C17 10nF
C186
0.47uF
R159 OPT
2512
Q10
MMBT3906-AL3-R
SOT-323
R9 5k
R17 OPT
R28 OPT
+
C2
270uF
16V
+
COUT7 470uF 2.5V 7343
L2 0.215uH
J1
VIN
E4
VOUT-
R11 1k
R8 10K L1 0.215uH
R35 OPT
R121
OPT
R119 OPT
C29 0.47uF
R10 10K
E2
VIN-
R162
0
R114
0
R174 OPT
CIN6 22uF 1210
R161 OPT
R213
OPT
C5
OPT
CIN1 22uF 1210
R120
OPT
R177 0
C14 10nF
COUT2 100uF 1210 6.3V
C1 2.2uF
C190 4.7uF
C9 220nF
COUT41 100uF 1210 6.3V
COUT1 100uF 1210 6.3V
R5 10
R27 OPT
CIN4 22uF 1210
C189
330pF
R12
1k
R160 OPT
R38 OPT
JP1
1
2
3
U15
VCC
3
2
LGND
VOS
1
PGND
5
6
GL
VDRV
4
SW 19
VIN
28
VIN
29
SW 10 SW 12 SW 13 SW 14 SW 15 SW 16 SW 11
PGND 24
VIN
25
VIN
26
VIN
27
VIN
30
31
NC PHASE
32
SW 17 SW 18
BOOST
33
PWM
34
EN
35
36
TOUT/FLT
37
OCSET
IOUT
38
REFIN
39
PGND
40
41
GL
PGND 23 PGND 22 PGND 21 PGND 20
9
PGND
8
PGND
7
PGND
COUT6 100uF 1210 6.3V
R125 OPT
+
C54
270uF
16V
R32 OPT
+
COUT4 470uF 2.5V 7343
C12 330pF
J4
GND
R16 10
CIN3 22uF 1210
CIN8 22uF 1210
C4 4.7uF
R30 0
R163 10k
C205 1uF
J5
VOUT
R181 OPT
CIN2 22uF 1210
R1
0.001
2512
R37 OPT
R29 10K
C13 6.8nF
E1
VIN+
R22 OPT
R170
OPT
R14 649 1%
C184
330pF
C16 220nF
E3
VOUT+
R3
0
C181
0.47uF
C187 OPT
C75
4.7uF
CIN7 22uF 1210
R24 OPT
R6 10K
+
C53
270uF
16V
J6
GND
R4 0
R13 1k
R173 0
R43 0
R26
OPT
C183
OPT
+
COUT8 470uF 2.5V 7343
R36 OPT
C3 2.2uF
0603
J3
VOUT

13
dc2605af
DEMO MANUAL DC2605A
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D D C C B B A A
DCR SENSING
LOWDCR
NORMAL
ILIM
RANGE_HIGH
RANGE_LOW
FP1007R3-R22-R
FP1007R3-R22-R
FDMF3170
FDMF3170
HZ
INTVCC2
INTVCC2
VIN
EXTVCCINTVCC2
INTVCC2
VIN1
VIN1
VDR
VOUT
INTVCC2
VDD33
VDR
VOUT
VDD33
FAULT
VOUT
ITH
RUN
PGOOD
SYNC
AC_DC
ILIM
SW3
SW3
VREF_CM2
VSENSE+
SW4
SW4
VREF_CM2
VSENSE+
RUN
RUN
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Wednesday, October 18, 2017 24
HIGH EFFICIENCY, POLY-PHASE SYNCHRONOUS BUCK
l _
N/A
LTC3884-1, LTC3874-1
DEMO CIRCUIT 2605A
CONVERTER WITH POWER SYSTEM MANAGEMENT
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Wednesday, October 18, 2017 24
HIGH EFFICIENCY, POLY-PHASE SYNCHRONOUS BUCK
l _
N/A
LTC3884-1, LTC3874-1
DEMO CIRCUIT 2605A
CONVERTER WITH POWER SYSTEM MANAGEMENT
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Wednesday, October 18, 2017 24
HIGH EFFICIENCY, POLY-PHASE SYNCHRONOUS BUCK
l _
N/A
LTC3884-1, LTC3874-1
DEMO CIRCUIT 2605A
CONVERTER WITH POWER SYSTEM MANAGEMENT
R194
OPT
R200
OPT
U2
LTC3874-1
MODE0
24
ISENSE0+ 1
ISENSE0- 2
RUN0
3
RUN1
4
ISENSE1- 5
ISENSE1+ 6
MODE1
7
ITH1
8
FREQ
9
ILIM
10
SYNC
11
PHASMD
12
PWM1 13
VCC1 14
EXTVCC 15
INTVCC 16
VIN 17
VCC0 18
PWM0 19
FAULT1 20
LOWDCR
22
ITH0
23
GND
25
FAULT0 21
C204
1uF
R199 OPT
CIN14 22uF 1210
C207 1uF
C199 OPT
R198 OPT
C33 220nF
JP2
1
2
3
R141 OPT
R117
0
R185 OPT
R59 OPT
CIN9 22uF 1210
C193 OPT
R201 10k
R134 OPT
C198
0.47uF
COUT16 100uF 1210 6.3V
C19 1.0uF
CIN11 22uF 1210
COUT12 100uF 1210 6.3V
R188 0
R204 OPT
C20 4.7uF
C21 220nF
R52 0
COUT11 100uF 1210 6.3V
CIN13 22uF 1210
L3 0.215uH
COUT10 100uF 1210 6.3V
CIN10 22uF 1210
R148
0
R184 OPT
R187 10k
R218 0
C202 4.7uF
R203 0
R55 100k
R191
0
R183 OPT
C194 0.47uF
C200 0.47uF
C201
330pF
R216 0
L4 0.215uH
R209 OPT
R197 OPT
R207 0
R206
0
R186
0
U17
VCC
3
2
LGND
VOS
1
PGND
5
6
GL
VDRV
4
SW 19
VIN
28
VIN
29
SW 10 SW 12 SW 13 SW 14 SW 15 SW 16 SW 11
PGND 24
VIN
25
VIN
26
VIN
27
VIN
30
31
NC PHASE
32
SW 17 SW 18
BOOST
33
PWM
34
EN
35
36
TOUT/FLT
37
OCSET
IOUT
38
REFIN
39
PGND
40
41
GL
PGND 23 PGND 22 PGND 21 PGND 20
9
PGND
8
PGND
7
PGND
R190
0
R51 0
C197 4.7uF
C192
0.47uF
+
COUT15
470uF 2.5V 7343
R202
0
R49 2
1%
+
COUT14
470uF 2.5V 7343
R135 649 1%
R192 0
R189 OPT
R143 649 1%
R217 OPT
R56 0
R205
0
C203 4.7uF
R195
OPT
C18 4.7uF
CIN15 22uF 1210
JP3
1
2
3
C196 4.7uF
U18
VCC
3
2
LGND
VOS
1
PGND
5
6
GL
VDRV
4
SW 19
VIN
28
VIN
29
SW 10 SW 12 SW 13 SW 14 SW 15 SW 16 SW 11
PGND 24
VIN
25
VIN
26
VIN
27
VIN
30
31
NC PHASE
32
SW 17 SW 18
BOOST
33
PWM
34
EN
35
36
TOUT/FLT
37
OCSET
IOUT
38
REFIN
39
PGND
40
41
GL
PGND 23 PGND 22 PGND 21 PGND 20
9
PGND
8
PGND
7
PGND
R215 OPT
+
COUT13
470uF 2.5V 7343
C23 22pF
C195
330pF
CIN12 22uF 1210
+
COUT9
470uF 2.5V 7343
CIN16 22uF 1210

14
dc2605af
DEMO MANUAL DC2605A
5 5
4 4
3 3
2 2
1 1
D D C C B B A A
VOUT
PULSE
DYNAMIC LOAD CIRCUIT
70Hz, 3% Duty Cycle
INT EXT
1%
IOUT STEP
5.5V BIAS
ON
OFF
BIAS
2512
27.4
BLEEDER LOADS
HZ
VDR
VIN EXTVCC
VDR
VOUT
VOUT
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Thursday, August 17, 2017 34
HIGH EFFICIENCY, POLY-PHASE SYNCHRONOUS BUCK
l _
N/A
LTC3884-1, LTC3874-1
DEMO CIRCUIT 2605A
CONVERTER WITH POWER SYSTEM MANAGEMENT
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Thursday, August 17, 2017 34
HIGH EFFICIENCY, POLY-PHASE SYNCHRONOUS BUCK
l _
N/A
LTC3884-1, LTC3874-1
DEMO CIRCUIT 2605A
CONVERTER WITH POWER SYSTEM MANAGEMENT
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Thursday, August 17, 2017 34
HIGH EFFICIENCY, POLY-PHASE SYNCHRONOUS BUCK
l _
N/A
LTC3884-1, LTC3874-1
DEMO CIRCUIT 2605A
CONVERTER WITH POWER SYSTEM MANAGEMENT
R98
10K
C42
1.0uF
Q24
SUD50N03-10CP-E3
R101 0.01 2512
R87 0
+
COUT40
OPT 2.5V 7343
E7
EXT PULSE
R103
5K
C43 220pF
R99
301
R100
82.5 1%
C41 1.0uF
+
COUT17
OPT 2.5V 7343
R104
1.21K 1%
R93
154k
R102 0.01
2512
C44
100uF 10V 1210
+
COUT22
OPT 2.5V 7343
R105 118K 1%
+
COUT18
OPT 2.5V 7343
COUT26 1.0uF
R94 1M
U6 LT1803IS5
VOUT 1
V-
2
+IN
3-IN 4
V+
5
+
COUT23
OPT 2.5V 7343
C40 150pF
R96 20K
E8
GND
C31 10uF 16V 1210
C39 100nF
U5 LTC6992IS6-1 MOD
1
GND
2
SET
3DIV 4
V+ 5
OUT 6
U4
LTC3630EMSE
SW 1
VIN
3
FBO
12
VPRG1 7 VPRG2 6
GND
8
VFB 9
SS 10
ISET
11
GND
14
RUN
5
GND
16
GND
17
+
COUT38
OPT 2.5V 7343
C35 100uF 1210 6.3V
J11
1
2
C30 100uF 10V 1210
C34 100uF 1210 6.3V
R91 0
+
COUT35
OPT 2.5V 7343
R97 681K
1%
R89 2
R107 20K
COUT25 100uF 1210 6.3V
R106 118k
1%
R85
COUT20 100uF 1210 6.3V
+
COUT39
OPT 2.5V 7343
L5
68uH
SUMIDA CDRH105
+
COUT36
OPT 2.5V 7343
C49
47nF
J12
1
2
Q23
SUD50N03-10CP-E3
JP5
1
2
3
COUT24 100uF 1210 6.3V
+
COUT37
OPT 2.5V 7343
C51 OPT
COUT19 100uF 1210 6.3V
R92 3.3 1%
R95 20K
JP4
1
2
3

15
dc2605af
DEMO MANUAL DC2605A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications
subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
SCHEMATIC DIAGRAM
5 5
4 4
3 3
2 2
1 1
D D C C B B A A
PGOOD
TO DC2086A
ON OFF RUN
TO DC1613A
ALL PARTS ON THIS PAGE ARE FOR DEMO BOARD ONLY, NOT NEEDED IN CUSTOMER DESIGN
1206
GPIO
ALERTB
HZ
EEWP
EESDA
AUX3V4
AUXVCC
EESCL
PGOOD
VDD33
3V3
VDD33
3V3
VIN
3V3
VIN 3V3
3V3 3V3
PGOOD
ALERTB SDA SCL
RUN FAULT
SYNC
SHARE_CLK
FAULT
ALERTB
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Thursday, August 17, 2017 44
HIGH EFFICIENCY, POLY-PHASE SYNCHRONOUS BUCK
l _
N/A
LTC3884-1, LTC3874-1
DEMO CIRCUIT 2605A
CONVERTER WITH POWER SYSTEM MANAGEMENT
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Thursday, August 17, 2017 44
HIGH EFFICIENCY, POLY-PHASE SYNCHRONOUS BUCK
l _
N/A
LTC3884-1, LTC3874-1
DEMO CIRCUIT 2605A
CONVERTER WITH POWER SYSTEM MANAGEMENT
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE
www.linear.com
2
Thursday, August 17, 2017 44
HIGH EFFICIENCY, POLY-PHASE SYNCHRONOUS BUCK
l _
N/A
LTC3884-1, LTC3874-1
DEMO CIRCUIT 2605A
CONVERTER WITH POWER SYSTEM MANAGEMENT
E36
AUXP
E26
SYNC
R136 OPT
D9 GREEN
E23
SDA
R138 0
E21
GND
D6 GREEN
R137 0
R70 10
E34
RUN
E37
PGOOD
J14
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
D13
21
R130 402
R150 4.99K
R122 OPT
J13DEMO 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
R139 OPT
R79 402
R123 10K
Q29
DMP3130L-7
23
1
Q20
DMP3130L-7
23
1
D11 OPT
U8
24LC024-I/ST
A0
1
A1
2
A2
3
VSS
4SDA 5
SCL 6
WP 7
VCC 8
Q26
2N7002A
2 3
1
C28 10nF
D7 RED
R142 OPT
J16
AUX3V4 4
SCL 3
GND 2
1
SDA
Q21
2N7002A
2 3
1
R147 15.8k
R81 255
R127
0
E22
ALERTB
J15DEMO 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
R145 OPT
E24
SCL
R128 4.99K
C50
100nF
SW2
1
2
3
4
5
6
E28
FAULT
R151 OPT
E25
SHARE_CLK

16
dc2605af
DEMO MANUAL DC2605A
LT 0218 • PRINTED IN USA
 ANALOG DEVICES, INC. 2018
ESD Caution
ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection
circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.
Legal Terms and Conditions
By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and
conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation
Board until you have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you (“Customer”)
and Analog Devices, Inc. (“ADI”), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. Subject to the terms and conditions of the Agreement, ADI hereby grants to
Customer a free, limited, personal, temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and
agrees that the Evaluation Board is provided for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted
is expressly made subject to the following additional limitations:Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board;and (ii) permit any Third
Party to access the Evaluation Board. As used herein, the term “Third Party”includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is
NOT sold to Customer;all rights not expressly granted herein, including ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all
be considered the confidential and proprietary information of ADI. Customer may not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of
use of the Evaluation Board or termination of this Agreement, Customer agrees to promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile
or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited
to soldering or any other activity that affects the material content of the Evaluation Board. Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS
Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF
LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED “AS IS”AND ADI MAKES NO WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY
DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS
LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF THE EVALUATION BOARD, INCLUDING
BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE AMOUNT OF ONE
HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable United States
federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of Massachusetts
(excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby submits
to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed.