DC1811B-A - Demo Manual

DEMO MANUAL DC1811B-A
LTM4676
Dual Step-Down µModule
Regulator with PMBus Digital
Power System Management
Description
Demonstration circuit 1811B-A is a dual-output, high
efficiency, high density, µModule® regulator with 4.5V to
26.5V input range. Each output can supply 13A maximum
load current. The demo board has a LTM®4676 µModule
regulator, which is a dual 13A or single 26A step-down
regulator with PMBus power system management. Please
see LTM4676 data sheet for more detailed information
The DC1811B-A powers up to default settings and produces
power based on configuration resistors 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 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 LTM4676 Quick Start Guide.
Design files for this circuit board are available at
http://www.linear.com/demo/DC1811BA
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.
Board Photo
Figure 1. Dual-Output LTM4676/DC1811B-A Demo Circuit
dc1811baf
1
DEMO MANUAL DC1811B-A
Performance Summary
PARAMETER
(TA = 25°C)
CONDITION
VALUE
Input Voltage Range
4.5V to 26.5V
Output Voltage, VOUT0
VIN = 4.5V to 26.5V, IOUT0 = 0A to 13A
0.5V to 4V, Default: 1V
Maximum Output Current, IOUT0
VIN = 4.5V to 26.5V, VOUT = 0.5V to 4V
13A
Output Voltage, VOUT1
VIN = 4.5V to 26.5V, IOUT1 = 0A to 13A
0.5V to 5.4V, Default: 1.8V
Maximum Output Current, IOUT1
VIN = 4.5V to 26.5V, VOUT = 0.5V to 5.4V
13A
Typical Efficiency
VIN = 12V, VOUT = 1.8V, IOUT = 13A
86.3%
Default Switching Frequency
500kHz
Quick Start Procedure
Table 1. LTM4676 Demo Cards for Up to 130A Point-of-Load Regulation
MAXIMUM OUTPUT CURRENT
NUMBER OF OUTPUT VOLTAGES
NUMBER OF LTM4676 µMODULE
REGULATORS ON THE BOARD
DEMO BOARD NUMBER
13A, 13A
2
1x LTM4676
DC1811A/DC1811B-A
13A, 13A
2
1x LTM4676A
DC1811B-B
26A
1
1x LTM4676
DC2087A
50A
1
2x LTM4676
DC1989A-A
75A
1
3x LTM4676
DC1989A-B
100A
1
4x LTM4676
DC1989A-C
100A
1
1x LTM4676 (+ 3x LTM4620A)
DC2106A-A
130A
1
1x LTM4676 (+ 3x LTM4630)
DC2106A-B
Demonstration circuit 1811B-A is easy to set up to evaluate the performance of the LTM4676. Refer to Figure 2
for the proper measurement equipment setup and follow
the procedure below.
1.With power off, connect the input power supply to VIN
(4.5V to 26.5V) and GND (input return).
2.Connect the 1.0V output load between VOUT0 and GND
(Initial load: no load).
3.Connect the 1.8V output load between VOUT1 and GND
(Initial load: no load).
4.Connect the DVMs to the input and outputs. Set default
jumper position: JP1: ON; JP2: ON.
5.Turn on the input power supply and check for the proper
output voltages. VOUT0 should be 1.0V ±1 %, and VOUT1
should be 1.8 ±1%.
6.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.
2
7.Connect the dongle and control the output voltages
from the GUI. See “LTpowerPlay GUI for the LTM4676
Quick Start Guide” for details.
Note: When measuring the output or input voltage ripple, do not use the long ground lead on the oscilloscope
probe. See Figure 3 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 DC1811B-A
You can use a PC to reconfigure the power management
features of the LTM4676 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 DC1613A dongle may be plugged
when VIN is present.
dc1811baf
DEMO MANUAL DC1811B-A
Quick Start Procedure
A + -
+ Load1 (0~13A) -
V A -
Load0 (0~13A) + + V -
Vout0 Vout1 VIN -
+ + 4.5V-­‐26.5V -
-
A
V + Figure 2. Proper Measurement Equipment Setup
+
VOUT
–
COUT
GND
Figure 3. Measuring Output Voltage Ripple
dc1811baf
3
DEMO MANUAL DC1811B-A
Quick Start Procedure
Input Power Supply USB Cable USB to I2C/PMBus Dongle DC1613A VIN 12-­‐PIN (J1) Connector Vout0 LTM4676 Demo Board DC1811B-­‐A Load0 Load1 Vout1 Figure 4. Demo Setup with PC
95
VIN = 5V, fSW = 500kHz, CCM
95
90
90
85
85
80
75
70
65
VOUT = 1V
VOUT = 1.2V
VOUT = 1.5V
VOUT = 1.8V
VOUT = 2.5V
VOUT = 3.3V
0 1 2 3 4 5 6 7 8 9 10 11 12 13
LOAD CURRENT (A)
DC1811A F05
Figure 5. Efficiency vs Load Current at VIN = 5V
4
EFFICIENCY (%)
EFFICIENCY (%)
100
80
75
70
65
60
VIN = 12V
fSW = 500kHz
CCM
VOUT = 1V
VOUT = 1.2V
VOUT = 1.5V
VOUT = 1.8V
VOUT = 2.5V
VOUT = 3.3V
VOUT = 5V
0 1 2 3 4 5 6 7 8 9 10 11 12 13
LOAD CURRENT (A)
DC1811A F06
Figure 6. Efficiency vs Load Current at VIN = 12V
dc1811baf
DEMO MANUAL DC1811B-A
Quick Start Procedure
VOUT0
(20MHz BW)
50mV/DIV
VOUT1
(20MHz BW)
50mV/DIV
9.75A TO 13A
LOAD STEP
9.75A TO 13A
LOAD STEP
Figure 7. Output Voltage VOUT0 vs Load Current
(VOUT0 RANGE = 0)
Figure 8. Output Voltage VOUT1 vs Load Current
(VOUT1 Range = 1)
VOUT1
(20MHz BW)
10mV/DIV
VOUT0
(20MHz BW)
10mV/DIV
Figure 9. Output Voltage Ripple at VIN = 12V,
VOUT0 = 1V, IOUT0 = 13A
Figure 10. Output Voltage Ripple at VIN = 12V,
VOUT1 = 1.8V, IOUT1 = 13A
Figure 11. Thermal performance at VIN = 12V, VOUT0 = 1.0V, IOUT0 = 13A, VOUT1 = 1.8V, IOUT1 = 13A, TA = 24°C, 200LFM Airflow
dc1811baf
5
DEMO MANUAL DC1811B-A
LTpowerPlay SOFTWARE GUI
LTpowerPlay is a powerful Windows-based development
environment that supports Linear Technology power system management ICs, including the LTM4676, 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 LTM4676, the
LTC3880 and the LTC3883’s demo system, or a customer
board. The software also provides an automatic update
feature to keep the soft-ware 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 12. LTpowerPlay Main Interface
6
dc1811baf
DEMO MANUAL DC1811B-A
LTpowerPlay QUICK START GUIDE
The following procedure describes how to use LTpowerPlay
to monitor and change the settings of LTM4676.
1.Download and install the LTPowerPlay GUI:
d.If you want to change the output voltage to a different
value, like 1.5V. In the Config tab, type in 1.5 in the
VOUT_COMMAND box, like this:
http://www.linear.com/ltpowerplay
2.Launch the LTpowerPlay GUI.
a. The GUI should automatically identify the DC1811B-A.
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 LTM4676
is communicating:
Then, click the “W” (PC to RAM) icon to write these
register values to the LTM4676. After finishing this step,
you will see the output voltage will change to 1.5V.
If the write is successful, you will see the following message:
c. In the Toolbar, click the “R” (RAM to PC) icon to
read the RAM from the LTM4676. This reads the
configuration from the RAM of LTM4676 and loads
it into the GUI.
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.
dc1811baf
7
DEMO MANUAL DC1811B-A
Parts List
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
CAP., 150µF, 35V, ALUMINUM ELECTR.,
SUN ELECT., 35CE150AX
Required Circuit Components
1
1
CIN1
2
4
CIN2, CIN3, CIN4, CIN5
CAP., X5R, 10µF, 35V, 10%,1210
MURATA, GRM32ER6YA106KA12
3
6
COUT1-COUT3, COUT6-COUT8
CAP., X5R, 100µF, 6.3V, 20%, 1210
AVX, 12106D107MAT2A
4
2
COUT4, COUT5
CAP., 330µF, 6.3V, POSCAP, D3L
PANASONIC, 6TPF330M9L
5
2
C1, C14
CAP., X7R, 2200pF, 25V, 10%, 0603
AVX, 06033C222KAT2A
6
1
C26
CAP., X5R, 100nF, 16V, 10%,0603
AVX, 0603YD104KAT2A
7
2
C27, C28
CAP., X5R, 10nF, 16V, 10%,0603
AVX, 0603YD103KAT2A
8
1
C23
CAP., X7R, 1µF, 25V,10%, 0805
AVX, 08053C105KAT2A
9
3
C21, C22, C24
CAP., X5R, 1µF, 25V,10%, 0603
AVX, 06033D105KAT2A
10
2
JP1, JP2
HEADER 3 PIN 0.079 SINGLE ROW
SULLIN, NRPN031PAEN-RC
11
3
J2-J4
CONN, BNC, 5PINS
CONNEX, 112404
12
1
J1
CONN HEADER 12POS 2Mm STR DL PCB
FCI, 98414-G06-12ULF
13
6
J5-J10
BANANA JACK
KEYSTONE, 575-4
14
1
Q1
N-Channel 30-V Mosfet
VISHAY, SUD50N04-8M8P-4GE3
15
1
D8
DIODE, ULTRA LOW SCHOTTKY RECTIFIER NXP SEMI., PMEG2005AEL
16
1
Q19
P-Channel 30-V Mosfet
DIODES INC., DMP3130L-7
17
1
J11
CONN RECEPT 2mm DUAL R/A 14POS (F)
SULLINS, NPPN072FJFN-RC
18
1
J12
HEADER 14POS 2mm R/A GOLD (M)
MOLEX, 87760-1416
19
1
J13
HEADER, 4 PINS, SHROUDED
HIROSE, DF3A-4P-2DSA
20
10
R3, R5, R7, R9, R25, R31, R32, R63, R65, R66
RES., CHIP, 0Ω, 1%, 0603
NIC, NRC06ZOTRF
21
2
R69, R70
RES., CHIP, 10, 1%, 0603
NIC, NRC06F10R0TRF
22
12
R10-R16, R18, R19, R24, R52, R77
RES., CHIP, 10K, 1%, 0603
NIC, NRC06F1002TRF
23
1
R78
RES., CHIP, 15.8K, 1%, 0603
NIC, NRC06F1582TRF
24
1
R30
RES., CHIP, 6.34K, 1%, 0603
VISHAY, CRCW06036K34FKEA
25
3
R2, R72, R73
RES., CHIP, 4.99K, 1%, 0603
NIC, NRC06F4991TRF
26
1
R22
RES., CHIP, 4.22K, 1%, 0603
VISHAY, CRCW06034K22FKEA
27
1
R48
RES., CHIP, 0Ω, 0.5W, 2010
NIC, NRC50ZOTRF
28
1
R53
RES., CHIP, 0.01Ω, 1/2W, 1%, 2010
VISHAY, WSL2010R0100FEA
29
1
U3
IC, 24LC025-I/ST, SOIC
MICROCHIP, 24LC025-I/ST
30
1
U1
IC, LTM4676EY#PBF
LINEAR TECH., LTM4676EY#PBF
Additional Demo Board Circuit Components
1
0
C2, C15-C17(OPT)
CAP., 0603
2
0
D1, D2 (OPT)
DIODE, SOD-323
3
0
R4, R6, R8, R20, R23, R26-R29, R33, R35, R37, RES., OPTIONAL
R38, R41, R49, R61, R62, R64, R67, R68, R74,
R75, R82, R83, R88, R89 (OPT)
4
0
R50, R51(OPT)
RES., CHIP, 30, 1%, 2512
Hardware-For Demo Board Only
1
24
E1-E17, E20-E24, E28, E29
TESTPOINT, TURRET, 0.062"
MILL-MAX, 2308-2-00-80-00-00-07-0
2
2
XJP1, XJP2
SHUNT
SAMTEC, 2SN-BK-G
3
4
(STAND-OFF)
STAND-OFF, NYLON 0.50" tall (SNAP ON)
KEYSTONE, 8833
4
1
FAB, PRINTED CIRCUIT BOARD
DEMO CIRCUIT 1811B-A
8
dc1811baf
A
B
C
*
E17
J8
J7
E15
E5
J9
J10
E4
E2
GND0_SNS
GND
VOUT0
1.0V / 13A
VOUT0_SNS
GND
GND
4.5V - 26.5V
VIN
VIN
GND
5
R32
0
0
CIN1
150uF
35V
R25
+
VIN
CIN5
10uF
1210
COMP0a
COUT7
100uF
1210
P5
P4
OPT
P3
COUT8
100uF
1210
VOSNS0-
VOSNS0+
R23
OPT
0805
R20
R9 0
A1
A2
A3
B1
B2
B3
C1
C2
C3
D1
D2
D3
E9
D9
E10
D10
D8
E8
C5
D5
F2
F1
E2
E1
A5
B10
F11
F12
A11
A12
B11
B12
C11
C12
D11
D12
E12
VOUT0
VOUT0
VOUT0
VOUT0
VOUT0
VOUT0
VOUT0
VOUT0
VOUT0
VOUT0
VOUT0
VOUT0
VOSNS0-
VOSNS0+
VORB0-
VORB0+
COMP0b
COMP0a
TSNS0b
TSNS0a
ISNS0a+
ISNS0b+
ISNS0aISNS0b-
SNUB0
SW0
VINL
VINL
VINH0
VINH0
VINH0
VINH0
VINH0
VINH0
VINH0
VINH0
VINH0
0.035 VIA
TESTPOINTS
P1
M5
R4
0805
OPT
R6
OPT
P2
COMP1a
VOSNS1
R2
4.99K
C1
2200pF
3
LTM4676EY / LTM4676AEY
U1
*
R5
0
OPT
R33
4
* WHEN VIN < 5.75V, SHORT INTVCC TO VIN WITH R8 = 0ohm.
1. ALL RESISTORS ARE 0603.
ALL CAPACITORS ARE 0603.
NOTE: UNLESS OTHERWISE SPECIFIED
COUT6
100uF
1210
R22
4.22K
C14
2200pF
CIN4
10uF
1210
+ COUT5
330uF
6.3V
6TPF330M9L
C15
OPT
CIN3
10uF
1210
VOUT0
C16
OPT
CIN2
10uF
1210
4
H12
J11
J12
K11
K12
L11
L12
M11
M12
VINH1
VINH1
VINH1
VINH1
VINH1
VINH1
VINH1
VINH1
VINH1
L10
SW1
C2
OPT
3
A4
A6
A7
A8
A9
A10
B4
B5
B6
B7
B8
B9
C4
C6
C7
C8
C9
D4
D7
E3
F3
F10
G3
G10
G11
G12
H3
H10
J4
J10
K4
K7
K8
K9
L4
L5
L6
L7
L8
L9
M4
M6
M7
M8
M9
M10
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
SNUB1
G2
G1
ISNS1aISNS1b-
K5
TSNS1b
H2
H1
ISNS1a+
ISNS1b+
J5
TSNS1a
H8
COMP1a
J9
VORB1
J8
COMP1b
H9
VOSNS1
J1
J2
J3
K1
K2
K3
L1
L2
L3
M1
M2
M3
SYNC
VDD33
INTVCC
INTVCC
VTRIM1CFG
VOUT1CFG
VTRIM0CFG
VOUT0CFG
FSWPHCFG
ASEL
VDD25
RUN1
RUN0
WP
GPIO1
GPIO0
SDA
SCL
ALERT
SHARE_CLK
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
SGND
SGND
SGND
SGND
G7
G8
F7
F8
DNC
DNC
DNC
DNC
C10
E11
H11
K10
D
5
SHARE_CLK
ALERTB
SCL
SDA
GPIO0B
GPIO1B
H7
E5
E6
D6
E4
F4
RUN1
VDD25
ASEL
FREQ_CFG
VOUT0_CFG
VTRIM0_CFG
VOUT1_CFG
VTRIM1_CFG
F6
G4
H4
G5
H5
G6
H6
(OPT)
R24
10K
R16
10K
U1
R15
10K
2
HZ
JIAN L.
SCALE = NONE
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
JP2
1
0
1
E16
JIAN L.
APPROVED
1
DEMO CIRCUIT 1811B
SHEET 1
LTM4676EY + LTM4676AEY
Friday, October 24, 2014
IC NO.
DATE
6-2-14
OF 3
1
REV.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
GPIO1B
GPIO0B
SDA
SCL
ALERTB
SHARE_CLK
SYNC
VDD33
GND1_SNS
GND
INTVCC
VOUT1_SNS
VOUT1
1.8V / 13A
VDD25
E14
E13
E12
E11
E10
E6
E9
E8
E7
J5
E3
E1
J6
PRODUCTION
DUAL STEP-DOWN uMODULE REGULATOR
WITH POWER SYSTEM MANAGEMENT
DATE:
B
SIZE
1
DESCRIPTION
REVISION HISTORY
TECHNOLOGY
GPIO1B
GPIO0B
SDA
SCL
ALERTB
SHARE_CLK
SYNC
REV
TITLE: SCHEMATIC
RUN1
ON
OFF
2
R7
__
ECO
RUN0
3
RUN1
JP1
OFF
ON
1
RUN0
R19
10K
2
3
R18
10K
APPROVALS
LTM4676AEY
R14
10K
R3
0
B - B
0
6.34K
R13
10K
VDD33
VIN
COUT4
+
330uF
6.3V
6TPF330M9L
LTM4676EY
R31
R30
R29 (OPT)
R28 (OPT)
(OPT)
R26
R12
10K
R27
R11
10K
OPT
COUT3
100uF
1210
B - A
R10
10K
R8
COUT2
100uF
1210
VOUT1
CUSTOMER NOTICE
*
RUN0
F5
J6
K6
SYNC
VDD33
INTVCC
E7
J7
F9
G9
C17
OPT
COUT1
100uF
1210
2
A
B
C
D
DEMO MANUAL DC1811B-A
Schematic Diagram
dc1811baf
9
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
5
SGND
SGND
R51
2010
OPT
BLEEDER LOADS
R50
2010
OPT
VOUT1
COMP0a
RUN1
GPIO0B
R38
RUN0
GPIO1B
CUSTOMER NOTICE
COMP1a
4
3
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
VOUT0
J2
E20
C21
1uF
SCALE = NONE
JIAN L.
HZ
APPROVALS
E22
2
J4
IOSTEP
C24
1uF
DEMO CIRCUIT 1811B
2
1
SHEET 2
LTM4676EY / LTM4676AEY
Friday, October 24, 2014
IC NO.
J3
VOUT1
OF 3
1
REV.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
1
C23
1uF
1
C22
1uF
1
DUAL STEP-DOWN uMODULE REGULATOR
WITH POWER SYSTEM MANAGEMENT
DATE:
N/A
SIZE
R53
0.01
2010
Q1
SUD50N04
R49
2010
OPT
VOUT1
TECHNOLOGY
R52
10K
1
R48
2010
0.5W
0
VOUT0
TITLE: SCHEMATIC
GND
DO NOT EXCEED 5% DUTY CYCLE!
IOSTEP_CLK
1
DYNAMIC LOAD CIRCUIT
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.
R41 OPT.
OPT
R35 OPT
OPTIONAL JUMPER FOR DUAL PHASE
SINGLE OUTPUT CONFIGURATION
E24
E23
VOUT0
5
4
3
2
D
ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN
3
2
4
3
4
2
3
4
5
10
2
3
4
5
5
A
B
C
D
DEMO MANUAL DC1811B-A
Schematic Diagram
dc1811baf
A
B
C
SDA
SCL
WP
VCC
24LC025-I/ST
VSS
A2
A1
A0
U3
TO DC1613A
AUXP
SDA
GND
SCL
LGKPWR
ALERTB
GPIO_1
OUTEN_0
OUTEN_1
GND
AUXSCL
AUXSDA
J1
TO DC2086A
100nF
C26
5
6
7
3V3
EESDA
EESCL
EEWP
8 AUXVCC
1
2
3
4
5
6
7
8
9
10
11
12
3V3
4 AUX3V4
3
2
1
2
R72
4.99K
Q19
VDD33
DMP3130L-7
E21
AUXP
R73
4.99K
5
VIN
R77 10K
3
R78
15.8k
2
4
3
2
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
SCL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
SYNC
VIN
3V3
R83
OPT
R82
OPT
1206
R66
0
R89
OPT
R67
OPT
R88
OPT
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
4
OPT
3
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
2
SCALE = NONE
JIAN L.
HZ
APPROVALS
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
R63 0
J12 DEMO HEADER (M)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
R68
R65 0
HEADER 14POS 2MM R/A GOLD, Molex Connector Corp. 87760-1416
SHARE_CLK
J2, FEMALE, CONN RECEPT 2MM DUAL R/A 14POS, Sullins Conn. NPPN072FJFN-RC
J1, MALE, CONN
OPT
R75
PSM STACKING CONNECTORS:
OPT
R74
J11 DEMO HEADER (F)
SDA
R61 OPT
C27
10nF
R69
10
R64
OPT
DATE:
N/A
SIZE
TECHNOLOGY
D1
OPT
R62
OPT
RUN0
GPIO0B
E30
RUN1
RUN1
RUN0
E29
GPIO1B
1
DEMO CIRCUIT 1811B
SHEET 3
LTM4676EY / LTM4676AEY
Tuesday, July 22, 2014
IC NO.
OF 3
1
REV.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
C28
10nF
R70
10
1
DUAL STEP-DOWN uMODULE REGULATOR
WITH POWER SYSTEM MANAGEMENT
TITLE: SCHEMATIC
D2
OPT
ALL PARTS ON THIS PAGE ARE FOR DEMO BOARD ONLY, NOT NEEDED IN CUSTOMER DESIGN
ALERTB
VDD33
OPTIONAL CIRCUIT FOR PROGRAMMING
WITHOUT VIN
4
3
2
1
D8
AUX3V4
SCL
GND
SDA
J13
1
1
D
VDD33
5
A
B
C
D
DEMO MANUAL DC1811B-A
Schematic Diagram
11
dc1811baf
DEMO MANUAL DC1811B-A
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
12 Linear Technology Corporation
dc1811baf
LT 1114 • 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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