DC2165A - Demo Manual

DEMO MANUAL DC2165A
LTC3884EUK High Efficiency,
Dual-Output, Synchronous Buck Converter
with Power System Management
DESCRIPTION
Demonstration circuit 2165A is a high efficiency, high
density, dual-output buck converter with a 4.5V to 14V
input range. The output voltage is adjustable from 0.5V to
5.5V, and each output can supply up to 30A of load current
when the output voltage is within a 0.5V to 1.8V range.
This demo board features the LTC®3884, a dual-output
poly phase step-down controller with ultra-low DCR sensing and incorporates digital power system management.
The LTC3884 data sheet must be read in conjunction with
this demo board manual for this demonstration circuit
DC2165A.
The DC21065A powers up to default settings and produces power based on configuration resistors or with
its non-volatile memory without the need for any serial
bus communication. This allows easy evaluation of the
DC/DC converter. To fully explore the extensive power
system management features of the part, download the
PERFORMANCE SUMMARY
PARAMETER
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 Software LTpowerPlay 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 demo manual.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2165
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
LTpowerPlay is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
Specifications are at TA = 25°C
CONDITIONS
Input Voltage Range
VALUE
4.5V to 14V
Output Voltages, VOUT0/VOUT1
VIN = 4.5V to 14V, IOUT0/IOUT1 = 0A to 30A
Default: 1V
Maximum Output Current, IOUT0/IOUT1
VIN = 4.5V to 14V, VOUT0/VOUT1 = 0.5V to 1.8V
30A
Typical Efficiency
VIN = 12V, VOUT0/VOUT1 = 1.0V, IOUT0/IOUT1 = 30A
86.5%
Peak Efficiency
VIN = 12V, VOUT0/VOUT1 = 1.0V
88.8%
Default Switching Frequency
425kHz
dc2165af
1
DEMO MANUAL DC2165A
QUICK START PROCEDURE
Demonstration circuit 2165A is easy to set up to evaluate
the performance of the LTC3884. Refer to Figure 1 for
the proper measurement equipment setup and follow the
procedure below.
8. Once the proper output voltages are established, adjust
the loads within the operating range and observe the
output voltage regulation, ripple voltage and other
parameters.
1. With power off, connect the input power supply to VIN
(4.5V to 14V) and GND (input return).
9. Connect the dongle and control the output voltages from
the GUI. See LTpowerPlay Quick Start Guide session
for details.
2. Connect the output load between VOUT0/VOUT1 and GND
(Initial load: no load).
3. Connect the DVMs to the input and outputs.
4. Check the default jumper/switch position: JP1: OFF,
JP4: OFF, JP5: INT, SW1: OFF, SW2: OFF.
5. Turn on the input power supply up to 12V.
NOTE: Make sure that the input voltage does not
exceed 14V.
6. Turn on the switches: SW1: ON, SW2: ON.
7. Check for the proper output voltages from VOUT0+ to
VOUT0– and VOUT1+ to VOUT1–.
NOTE: When measuring the output or input voltage
ripple, 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 DC2165A
You can use a PC to reconfigure the power management
features of the LTC3884 such as: nominal VOUT, margin
set points, OV/UV limits, temperature fault limits, sequencing parameters, the fault log, fault responses, GPIOs and
other functionality. The DC2165A dongle may be plugged
when VIN is present.
V
+
1mΩ
+
V
VOUT0
LOAD0 (30A)
+ +
+
V
A
LOAD1 (30A)
VOUT1
VIN
4.5V TO 14V
V
+
1mΩ
+
V
Figure 1. Proper Measurement Equipment Setup
2
dc2165af
DEMO MANUAL DC2165A
QUICK START PROCEDURE
+
–
COUT
VOUT
GND
Figure 2. Measuring Output Voltage Ripple
INPUT POWER
SUPPLY
USB CABLE
USB TO I2C/PMBUS
DONGLE DC1613A
VIN
12-PIN (J7)
CONNECTOR
VOUT0
LTC3884 DEMO BOARD
DC2165A
VOUT1
LOAD0
LOAD1
Figure 3. Demo Setup with PC
dc2165af
3
DEMO MANUAL DC2165A
QUICK START PROCEDURE
95
EFFICIENCY (%)
90
85
80
75
1.5VOUT
1VOUT
0
5
10
15
20
25
OUTPUT LOAD CURRENT (A)
30
DC2165 F04
Figure 4. Efficiency vs Load Current at VIN = 12V, fSW = 425kHz
VOUT0 (20MHz BW)
(10mV/DIV)
Figure 5. Output Voltage Ripple at VIN = 12V, VOUT0 = 1V, IOUT0 = 30A
4
dc2165af
DEMO MANUAL DC2165A
QUICK START PROCEDURE
VOUT0 (20MHz BW)
(20mV/DIV)
0A TO 7.5A
LOAD STEP
Figure 6. Transient Response at VIN = 12V, VOUT0 = 1V, ∆IOUT0 = 7.5A
Figure 7. Thermal Performance at VIN = 12V, VOUT0 =1 .0V, IOUT0 = 30A, VOUT1 = 1.0V, IOUT1 = 30A, TA = 23.6°C, No Airflow
dc2165af
5
DEMO MANUAL DC2165A
LTpowerPlay QUICK START GUIDE
LTpowerPlay is a powerful Windows-based development environment that supports Linear Technology
power system management ICs, including the LTM4676,
LTC3880, LTC3883, LTC3884, 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 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://www.linear.com/LTpowerPlay
To access technical support documents for LTC Digital
Power Products visit Help. View online help on the
LTpowerPlay menu.
The following procedure describes how to use LTpowerPlay
to monitor and change the settings of LTC3884.
1. Download and install the LTpowerPlay GUI:
http://www.linear.com/LTpowerPlay
Figure 8. LTpowerPlay Main Interface
6
dc2165af
DEMO MANUAL DC2165A
LTpowerPlay QUICK START GUIDE
2. Launch the LTpowerPlay GUI.
a.
The GUI should automatically identify the DC2165A.
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
is communicating:
c.
In the Toolbar, click the “R” (RAM to PC) icon to
read the RAM from the LTC3884. This reads the
configuration from the RAM of LTC3884 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 register values to the LTC3884. After finishing
this step, you will see the output voltage will
change to 1.5V.
dc2165af
7
DEMO MANUAL DC2165A
LTpowerPlay QUICK START GUIDE
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 with a preferred
file name.
PARTS LIST
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
CAP, 1210 10μF 20% 35V X5R
AVX 1210DD106MAT2A
Required Circuit Components
1
4
CIN1, CIN2, CIN3, CIN4
2
10
COUT1, COUT2, COUT5, COUT6,
CAP, 1210 100μF 20% 6.3V X5R
COUT19, COUT20, COUT24, COUT25,
C34, C35
AVX 12106D107MAT2A
3
8
COUT3, COUT4, COUT7, COUT8,
COUT17, COUT18, COUT22, COUT23
CAP, 7343 330μF 20% 6.3V POSCAP
PANASONIC 6TPF330M9L
4
5
C7, COUT21, COUT26, C41, C42
CAP, 0603 1μF 20% 25V X5R
AVX 06033D105MAT2A
5
1
C1
CAP, 0603 2.2μF 20% 6.3V X5R
AVX 06036D225MAT2A
6
2
C2, C32
CAP, 270μF 20% 16V OSCON
PANASONIC 16SVPC270M
7
1
C3
CAP, 0805 1μF 10% 16V X7R
AVX 0805YC105KAT2A
8
1
C4
CAP, 0603 4.7μF 10% 10V X5R
AVX 0603ZD475KAT2A
0
1
C6
CAP, 0603 4.7μF 20% 25V X5R
TDK C1608X5R1E475M080AC
10
2
C8, C15
CAP, 0603 0.1μF 10% 25V X7R
AVX 06033C104KAT2A
11
2
C9, C16
CAP, 0603 220nF 10% 25V X7R
TDK C1608X7R1E224K
12
3
C10, C12, C40
CAP, 0603 150pF 5% 50V NPO
AVX 06035A151JAT2A
13
2
C11, C13
CAP, 0603 1500pF 5% 50V C0G
MURATA GRM1885C1H152JA01D
14
4
C14, C17, C27, C28
CAP, 0603 10nF 10% 25V X7R
AVX 06033C103KAT2A
15
2
C26, C39
CAP, 0603 100nF 20% 16V X7R
AVX 0603YC104MAT2A
16
2
C30, C31
CAP, 1210 10μF 10% 16V X7R
MURATA GRM32DR71C106KA01
17
2
D1, D2
DIODE, SCHOTTKY 30V, 100mA
CENTRAL SEMI CMDSH-3-TR
18
4
D5, D6, D8, D9
LED, 0603 GREEN
WURTH ELEKTRONIK 150060GS75000
19
1
D7
LED, 0603 RED
WURTH ELEKTRONIK 150060SS75000
20
1
D12
DIODE, ULTRA LOW SCHOTTKY RECTIFIER
NXP SEMI. PMEG2005AEL, 315
21
2
L1, L2
IND, 0.25μH
WURTH ELEKTRONIK 744301025
8
dc2165af
DEMO MANUAL DC2165A
PARTS LIST
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
22
23
2
Q1, Q5
XSTR, POWER MOSFET
INFINEON BSC050NE2LS
2
Q3, Q8
XSTR, POWER MOSFET
INFINEON BSC010NE2LSI
24
2
Q7, Q10
XSTR, PNP GENERAL PURPOSE
DIODES INC. MMST3906-7-F
25
2
Q19, Q20
XSTR, N-CHANNEL DMOS FET
DIODES INC. DMP3130L-7
26
4
Q21, Q22, Q25, Q26
XSTR, N-CHANNEL DMOS FET
DIODES INC 2N7002A-7
27
2
Q23, Q24
XSTR, MOSFET, N-CHANNEL 30V
VISHAY SUD50N04-8M8P-4GE3
28
1
R1
RES, 2512 0.005Ω 1% 1W
SUSUMU KRL3264E-C-R005-F-T5
29
1
R2
RES, 0603 1Ω 1% 1/10W
VISHAY CRCW06031R00FKEA
30
10
R3, R4, R15, R19, R63, R65, R66,
R91, R113, R114
RES, 0603 0Ω JUMPER
VISHAY CRCW06030000Z0EA
31
4
R5, R16, R18, R21
RES, 0603 10Ω 1% 1/10W
VISHAY CRCW060310R0FKEA
32
12
R6, R7, R8, R10, R29, R30, R33,
R34, R77, R87, R98, R105
RES, 0603 10kΩ 5% 1/10W
VISHAY CRCW060310K0JNEA
33
6
R9, R11, R12, R13, R72, R73
RES, 0603 4.99kΩ 1% 1/10W
VISHAY CRCW06034K99FKEA
34
2
R14, R20
RES, 0603 715Ω 1% 1/10W
VISHAY CRCW0603715RFKEA
35
2
R69, R70
RES, 0603 10Ω 5% 1/10W
VISHAY CRCW060310R0JNEA
36
1
R78
RES, 0603 15.8kΩ 1% 1/10W
VISHAY CRCW060315K8FKEA
37
4
R79, R80, R125, R130
RES, 0603 200Ω 5% 1/10W
VISHAY CRCW0603200RJNEA
38
1
R81
RES, 0603 127Ω 1% 1/10W
VISHAY CRCW0603127RFKEA
39
1
R89
RES, 0603 2Ω 5% 1/10W
VISHAY CRCW06032R00JNEA
40
1
R90
RES, 2010 0Ω JUMPER
VISHAY CRCW20100000Z0EA
41
1
R92
RES, 0603 3.3Ω 1% 1/10W
VISHAY CRCW06033R30FKEA
42
1
R93
RES, 0603 154kΩ 1% 1/10W
VISHAY CRCW0603154KFKEA
43
1
R94
RES, 0603 1MΩ 5% 1/10W
VISHAY CRCW06031M00JNEA
44
2
R95, R96
RES, 0603 20kΩ 5% 1/10W
VISHAY CRCW060320K0JNEA
45
1
R97
RES, 0603 681kΩ 1% 1/10W
VISHAY CRCW0603681KFKEA
46
1
R99
RES, 0603 182Ω 1% 1/10W
VISHAY CRCW0603182RFKEA
47
1
R100
RES, 0603 82.5Ω 1% 1/10W
VISHAY CRCW060382R5FKEA
48
1
R101
RES, 2512 0.01Ω 1% 1W
VISHAY WSL2512R0100FEA
49
1
R103
RES, VARIABLE 5kΩ
BOURNS 3386P-1-502-LF
50
1
R104
RES, 0603 649Ω 1% 1/10W
VISHAY CRCW0603649RFKEA
51
1
R107
RES, 0603 34.8kΩ 1% 1/10W
VISHAY CRCW060334K8FKEA
52
2
SW1, SW2
SWITCH, SUBMINIATURE SLIDE
C&K JS202011CQN
53
1
U1
IC, LTC3884
LINEAR TECH. LTC3884EUK#10E1-1PBF-ES
54
1
U3
IC, 24LC05-I/ST
MICROCHIP 24LC025-I/ST
55
1
U4
IC, REGULATOR
LINEAR TECH. LT1761ES5-SD#PBF
56
1
U5
IC, LTC6992
LINEAR TECH. LTC6992IS6-1#PBF
57
1
U6
IC, SINGLE OP AMP
LINEAR TECH. LT1803IS5#PBF
dc2165af
9
DEMO MANUAL DC2165A
PARTS LIST
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
Additional Demo Board Circuit Components
1
0
C5
CAP, 0603 OPTION
OPTION
2
0
D10, D11
DIODE, SCHOTTKY 30V, 100mA OPTION
CENTRAL SEMI CMDSH-3-TR OPTION
3
0
Q2, Q4, Q6, Q9
XSTR, POWER MOSFET OPTION
OPTION
4
0
R17, R22, R23, R24, R25, R26, R27,
R28, R31, R32, R35, R36, R37, R38,
R39, R40, R42, R43, R45, R46, R61,
R62, R64, R67, R68, R74, R75,
R106, R126, R139, R142, R146,
R147
RES, 0603 OPTION
OPTION
5
0
R41, R44, R47, R48, R85, R86, R88
RES, 2010 OPTION
OPTION
6
0
R102
RES, 2512 OPTION
OPTION
1
26
E1, E2, E3, E4, E5, E6, E7, E8, E9,
E10, E11, E12, E13, E14, E20, E21,
E22, E23, E24, E25, E26, E27, E28,
E29, E30, E31
TURRET
MILL MAX 2501-2-00-80-00-00-07-0
2
3
JP1, JP4, JP5
HEADER, SINGLE ROW 3-PIN
WURTH ELEKTRONIK 62000311131
3
6
J1, J2, J3, J4, J5, J6
STUD, TEST PIN
PEM KFH-032-10
4
1
J7
HEADER, 12-PIN 2mm STR DL
FCI 98414-G06-12ULF
5
1
J8
CONN, SOCKET 14-PIN DUAL ROW R/A
SULLINS INC. NPPN072FJFN-RC
6
1
J9
HEADER, 14-PIN DUAL ROW R/A
MOLEX 87760-1416
7
3
J10, J11, J12
CONN, BNC, 5 PINS
AMPHENOL CONNEX 112404
8
1
J16
HEADER, 4-PIN 2mm STR DL
HIROSE DF3A-4P-2DSA
9
7
LUG RING, #10
KEYSTONE 8205
10
14
NUT, BRASS 10-32
ANY #10-32
11
7
WASHER, #10 TIN PLATED BRASS
ANY #10 EXT BZ TN
12
4
MH1, MH2, MH3, MH4
STANDOFF, SNAP ON
KEYSTONE 8834
13
3
XJP1, XJP4, XJP5
SHUNT
WURTH ELEKTRONIK, 60800213421
Hardware
10
dc2165af
A
B
C
D
J1
ALERTB
SDA
SCL
SYNC
VDD25
VDD33
INTVCC
E12
E11
E10
E9
16V
C2
270uF
2
R6
10K
VDD33
+
VIN
OPT
OPT
OPT
OPT
OPT
R25
R27
R31
R35
R37
5
VDD25
VDD33
INTVCC
EXTVCC
OPT
R22
VDD25
MMBT3906-AL3-R
SOT-323
+
R7
10K
Q10
Q7
MMBT3906-AL3-R
SOT-323
ITH1
ITH0
OFF
JP1
WP
ON
RUN1
RUN0
SHARE_CLK
E2
EXTVCC
VIN-
GND
J2
4.5V - 14V
VIN
E1
R38
R36
R32
R28
R26
R23
OPT
OPT
OPT
OPT
OPT
OPT
C17
10nF
R11
4.99K
FAULT0B
RUN0
ITH0
C12 150pF
C10 150pF
R9
R10
4.99K 10K
C14
10nF
R8
10K
16V
C32
270uF
R1
0.005
2512
EXTVCC
4.7uF
14
27
17
18
26
ALERTB
SHARE_CLK
RUN0
RUN1
WP1
6
29
30
ASEL1
23
22
R39
OPT
OPT
R45
OPT
R42
SYNC
E14
VDD33
VDD25
2.2uF
4
LTC3884EUK
U1
R33
10K
VDD33
R34
10K
VDD33
FAULT1B
FAULT0B
VSENSE1-
VSENSE1+
ISENSE1-
ISENSE1+
BG1
BOOST1
SW1
TG1
VSENSE0-
VSENSE0+
ISENSE0-
ISENSE0+
BG0
BOOST0
SW0
TG0
R4
0
VIN
OPT
C5
R3
0
VIN1
44 TG0
SW1
16
15
31
32
4
3
37
R29
10K
VDD33
FAULT1B
RUN1
ITH1
PGOOD0
VSENSE0-
VSENSE0+
4
R40
OPT
OPT
R46
OPT
R43
PGOOD1
VSENSE1-
VSENSE1+
VOUT0
2010
2010
R48
OPT
2010
R47 OPT
2010
R44 OPT
R41 OPT
R30
10K
R19
0
VSENSE0-
VOUT1
PGOOD1
PGOOD0
FAULT1B
FAULT0B
VSENSE1-
VSENSE1+
3
4
VIN1
4
Q2
OPT
4
Q6
OPT
Q4
OPT
4
CIN3
10uF
1210
CIN4
10uF
1210
CIN2
10uF
1210
L1
0.25uH
0.25uH
OPT
R24
R20
715
1%
OPT
744301025
L2
R17
R14
715
1%
744301025
COUT5
100uF
6.3V
1210
VOUT1
SCALE = NONE
[j
`\
APPROVALS
R114
0
R113
0
COUT1
100uF
6.3V
1210
VOUT0
2
-
N/A
DATE:
SIZE
1
COUT8
+ 330uF
6.3V
7343
COUT4
+ 330uF
6.3V
7343
PROTO
VOUT0
VOUT0+
VOUT1
VOUT1+
VOUT0-
GND
VOUT1-
GND
DATE
04/22/15
[j
APPROVED
1
SHEET 1
LTC3884EUK
DEMO CIRCUIT 2165A
Tuesday, October 06, 2015
IC NO.
2
OF 3
REV.
HIGH EFFICIENCY, DUAL-OUTPUT SYNCHRONOUS BUCK
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
E6
J6
1.0V AT 30A
J5
E5
E4
J4
1.0V AT 30A
J3
E3
REVISION HISTORY
DESCRIPTION
TECHNOLOGY
R21
10
1%
COUT7
+ 330uF
6.3V
7343
R18
10
1%
R16
10
COUT3
+ 330uF
6.3V
7343
R5
10
TITLE: SCHEMATIC
VSENSE1-
COUT6
100uF
6.3V
1210
VSENSE1+
VSENSE0-
COUT2
100uF
6.3V
1210
VSENSE0+
REV
ECO
NOTE:
T1 - T8 ARE EXPOSED PCB VIAS
2
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
Q9
OPT
4
CIN1
10uF
1210
2
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
Q8
BSC010NE2LSI
4
Q5
BSC050NE2LS
INTVCC
VIN1
Q3
BSC010NE2LSI
4
4
Q1
BSC050NE2LS
3
CMDSH-3-TR
0.1uF D2
C15
INTVCC
CMDSH-3-TR
D1
VSENSE0+
0.1uF
C8
VDD33
C16
220nF
BG1
TG1
36
35
C9
220nF
R15 0
34
2
1
8
7
42 BG0
43 BST0
45 SW0
OPTION FOR TWO-PHASE CONFIGURATION CONNECTION
PGOOD1
E13
PHASE_CFG
FREQ_CFG
VOUT1_CFG
VOUT0_CFG
ASEL1
ASEL0
TSNS1
TSNS0
ITH1
ITH_R1
ITH0
ITH_R0
WP
RUN1
RUN0
SHARE_CLK
ALERTB
SDA
SCL
1uF
C1
INTVCC
4.7uF
C7
EXTVCC
C4
PGOOD0
PHASE_CFG 24
FREQ_CFG
VOUT1_CFG
21
20
ASEL0
VOUT0_CFG
9
19
TSNS1
10
1500pF
TSNS0
C13
5
13
SDA
1500pF
12
SCL
C11
11
40
SYNC
R12
R13
4.99K 4.99K
C6
0805
C3 1uF
R2 1 1%
R147
OPT
INTVCC
47
VIN1
5
1
2
3
VIN+
1
3
39
VIN
25
VDD25
46
IIN+
38
INTVCC
PGND
41
GND
49
5
28
VDD33
PGOOD1
33
IINPGOOD0
48
5
5
1
2
3
5
1
2
3
5
1
2
3
1
2
3
5
1
2
3
1
2
3
5
1
2
3
5
A
B
C
D
DEMO MANUAL DC2165A
SCHEMATIC DIAGRAM
11
dc2165af
A
B
C
D
R93
R96
20K
154k 1%
3
2
1
R86
OPT
2010
DIV
V+
OUT
5
70Hz, 3% Duty Cycle
SET
GND
MOD
4
5
6
1M
R94
R97
681K
1%
0
R91
BLEEDER LOADS
R85
OPT
2010
U5 LTC6992IS6-1
VOUT0
VOUT1
R103
5K
C41
1.0uF
R95
20K
+5.5V
R104
649
1%
R99
182
1%
100nF
C39
3
2
5
4
+IN
V-
V+
VIN
OFF
ON
BIAS
C30
10uF
16V
1210
2
JP4
10K
R87
OPTIONAL 5.5V BIAS
3
2
1
ADJ
OUT
4
5
LT1761ES5-SD
SHDN
GND
IN
U4
3
R105
10K
R107
34.8K
1%
+5.5V
-IN
VOUT
4
1
3.3 1%
82.5 1%
R100
C40
150pF
R92
1
INT
3
R98
10K
EXT
JP5
PULSE
R89
2
R102
OPT
2512
C42
1.0uF
1
SUD50N04-8M8P-4GE3
Q24
C34
100uF
6.3V
1210
CUSTOMER NOTICE
R101
0.01
2512
Q23
SUD50N04-8M8P-4GE3
E8
2
J12
GND
3
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
OPT
2
2
SCALE = NONE
[j
`\
APPROVALS
2010
R90 0
2010
R88
EXTVCC
IOUT STEP
OPT
R106
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
EXT PULSE
E7
C35
100uF
6.3V
1210
C31
10uF
16V
1210
DYNAMIC LOAD TEST CIRCUIT, FOR DEMO BOARD ONLY
U6 LT1803IS5
4
1
3
12
2
5
DATE:
N/A
SIZE
COUT25
100uF
6.3V
1210
COUT20
100uF
6.3V
1210
TECHNOLOGY
COUT24
100uF
6.3V
1210
COUT19
100uF
6.3V
1210
2
J11
2
VOUT1
VOUT1
VOUT0
VOUT0
J10
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
COUT26
1.0uF
1
COUT21
1.0uF
1
1
SHEET 2
LTC3884EUK
DEMO CIRCUIT 2165A
Friday, September 04, 2015
IC NO.
2
OF 3
REV.
HIGH EFFICIENCY, DUAL-OUTPUT SYNCHRONOUS BUCK
CONVERTER WITH POWER SYSTEM MANAGEMENT
TITLE: SCHEMATIC
COUT22
COUT23
+ 330uF
+ 330uF
6.3V
6.3V
7343
7343
COUT17
COUT18
+ 330uF
+ 330uF
6.3V
6.3V
7343
7343
1
A
B
C
D
DEMO MANUAL DC2165A
SCHEMATIC DIAGRAM
dc2165af
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
VIN
3
R77
3V3
SDA
SCL
WP
VCC
U3
5
R78
15.8k
Q19
DMP3130L-7
10K
2
2
100nF
C26
3V3
EESCL
EESDA
6
5
VDD33
EEWP
7
8 AUXVCC
1
2
3
4
5
6
7
8
9
10
11
12
24LC025-I/ST
VSS
A2
A1
A0
E21
GND
4
3
2
1
D12
4 AUX3V4
3
2
1
TO DC1613A
AUXP
SDA
GND
SCL
LGKPWR
ALERTB
GPIO_1
OUTEN_0
OUTEN_1
GND
AUXSCL
AUXSDA
J7
TO DC2086A
AUX3V4
SCL
GND
SDA
J16
1
1
FAULT0B
E20
AUXP
1
R72
4.99K
D5
3V3
2N7002A
Q21
GREEN
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
SDA
4
D6
1
SYNC
1
SHARE_CLK
ALERTB
E24
SCL
2N7002A
Q22
GREEN
GPIO1
R80
200
OPT
R75
3V3
OPT
R74
1
2
3
4
5
6
7
8
9
10
11
12
13
14
SCL
J8
E23
SDA
DEMO HEADER (F)
E22
ALERTB
FAULT1B
ALERTB
GPIO0
R79
200
R73
4.99K
3
3V3
D7
TP0101K
Q20
R81
127
3
PGOOD0
R139
OPT
1206
R66
0
1
D9
R142
OPT
3V3
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
OPT
PGOOD1
J9
CUSTOMER NOTICE
2N7002A
Q26
GREEN
PGOOD0
R130
200
R126
OPT
DEMO HEADER (M)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
R68
R65 0
R63 0
R61 OPT
1
OFF
5
D8
ON
SW1
RUN1
D11
OPT
3V3
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
C27
10nF
R69
10
D10
OPT
2
SCALE = NONE
[j
`\
APPROVALS
2N7002A
Q25
GREEN
PGOOD1
R125
200
2
R64
OPT
2
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
R67
OPT
E26
E25
R146
OPT
ALERTB
RED
VIN
3V3
SYNC
SHARE_CLK
ALL PARTS ON THIS PAGE ARE FOR DEMO BOARD ONLY, NOT NEEDED IN CUSTOMER DESIGN
3
2
2
3
VDD33
3
2
4
3
2
4
1
6
3
3
2
OFF
5
ON
SW2
RUN0
2
DATE:
N/A
SIZE
FAULT0B
RUN0
E31
E30
SGND
RUN1
RUN1
RUN0
E29
TECHNOLOGY
C28
10nF
R70
10
FAULT1B
FAULT1B
FAULT0B
E28
E27
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
1
1
SHEET 3
LTC3884EUK
DEMO CIRCUIT 2165A
Tuesday, October 06, 2015
IC NO.
2
OF 3
REV.
HIGH EFFICIENCY, DUAL-OUTPUT SYNCHRONOUS BUCK
CONVERTER WITH POWER SYSTEM MANAGEMENT
TITLE: SCHEMATIC
R62
OPT
4
1
6
3
5
A
B
C
D
DEMO MANUAL DC2165A
SCHEMATIC DIAGRAM
dc2165af
13
DEMO MANUAL DC2165A
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
14 Linear Technology Corporation
dc2165af
LT 1215 • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2015
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