DESCRIPTION
DEMO MANUAL DC1811B-B
LTM4676A
Dual Step-Down µModule
Regulator with PMBus Digital
Power System Management
Demonstration circuit 1811B-B 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®4676A µModule
regulator, which is a dual 13A or single 26A step-down
regulator with PMBus power system management. Please
see LTM4676A data sheet for more detailed information.
The DC1811B-B 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
BOARD PHOTO
PC and use ADI’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: LTpowerPlay
For more details and instructions of LTpowerPlay, please refer
to LTpowerPlay GUI for LTM4676A Quick Start Guide.
Design files for this circuit board are available.
All registered trademarks and trademarks are the property of their respective owners.
Figure1. Dual-Output LTM4676A/DC1811B-B Demo Circuit
Rev. A
1
DEMO MANUAL DC1811B-B
PERFORMANCE SUMMARY
PARAMETER CONDITION VALUE
Input Voltage Range 4.5V to 26.5V
Output Voltage, V
Maximum Output Current, I
Output Voltage, V
Maximum Output Current, I
Typical Efficiency VIN = 12V, V
Default Switching Frequency 500kHz
*For low duty cycle applications, it may approach minimum on the limit. The minimum on-time for LTM4676A is 45ns nominal, guardband to 90ns.
OUT0
OUT0
OUT1
OUT1
VIN = 4.5V to 26.5V, I
VIN = 4.5V to 26.5V, V
VIN = 4.5V to 26.5V, I
VIN = 4.5V to 26.5V, V
(TA = 25°C)
= 1.8V, I
OUT
= 0A to 13A 0.5V to 5.5V (Minimum On)*, Default: 1V
OUT0
= 0.5V to 5.5V 13A
OUT
= 0A to 13A 0.5V to 5.5V (Minimum On)*, Default: 1.8V
OUT1
= 0.5V to 5.5V 13A
OUT
= 13A 86.3%
OUT
QUICK START PROCEDURE
Table 1. LTM4676/LTM4676A Demo Cards for Up to 130A Point-of-Load Regulation
NUMBER OF LTM4676/LTM4676A µMODULE
MAXIMUM OUTPUT CURRENT NUMBER OF OUTPUT VOLTAGES
13A, 13A 2 1× LTM4676 DC1811A/DC1811B-A
13A, 13A 2 1× LTM4676A DC1811B-B
26A 1 1× LTM4676 DC2087A
50A 1 2× LTM4676 DC1989A-A
75A 1 3× LTM4676 DC1989A-B
100A 1 4× LTM4676 DC1989A-C
100A 1 1× LTM4676 (+ 3× LTM4620A) DC2106A-A
130A 1 1× LTM4676 (+ 3× LTM4630) DC2106A-B
REGULATORS ON THE BOARD DEMO BOARD NUMBER
Demonstration circuit 1811B-B is easy to set up to evaluate the performance of the LTM4676A. Refer to Figure2
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 V
OUT0
and GND
(Initial load: no load).
3. Connect the 1.8V output load between V
OUT1
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. V
and V
should be 1.8V ±0.5%.
OUT1
should be 1.0V ±0.5 %,
OUT0
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.
7. Connect the dongle and control the output voltages
from the GUI. See “LTpowerPlay GUI for the LTM4676A
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 Figure3 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-B
You can use a PC to reconfigure the power management
features of the LTM4676A such as: nominal V
OUT
, 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.
Rev. A
2
QUICK START PROCEDURE
+
–
+
–
+
–
DEMO MANUAL DC1811B-B
LOAD1
(0A TO 13A)
V
–
OUT1
+
4.5V TO
26.5V
V
IN
+
+
–
–
+
V
OUT0
–
LOAD0
(0A TO 13A)
Figure2. Proper Measurement Equipment Setup
+ –
C
OUT
V
OUT
GND
Figure3. Measuring Output Voltage Ripple
Rev. A
3
DEMO MANUAL DC1811B-B
DC1811A F05
DC1811A F06
QUICK START PROCEDURE
InputPower
Supply
USBCable
USBtoI2C/PMBus
DongleDC1613A
100
VIN = 5V, fSW = 500kHz, CCM
95
90
85
80
EFFICIENCY (%)
75
70
65
1 2 3 4 5 13
0
LOAD CURRENT (A)
12PIN(J1)
Connector
V
= 1V
OUT
= 1.2V
V
OUT
= 1.5V
V
OUT
= 1.8V
V
OUT
= 2.5V
V
OUT
= 3.3V
V
OUT
6 7 8 109 11 12
LTM4676ADemo
BoardDC1811BB
Figure4. Demo Setup with PC
EFFICIENCY (%)
VIN
Vout0
Vout1
95
90
85
80
75
70
65
60
VIN = 12V
= 500kHz
f
SW
CCM
1 2 3 4 5 13
0
6 7 8 109 11 12
LOAD CURRENT (A)
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
Load0
Load1
= 1V
= 1.2V
= 1.5V
= 1.8V
= 2.5V
= 3.3V
= 5V
4
Figure5. Efficiency vs Load Current at VIN = 5V Figure6. Efficiency vs Load Current at VIN = 12V
Rev. A
QUICK START PROCEDURE
DEMO MANUAL DC1811B-B
V
OUT0
(20MHz BW)
50mV/DIV
9.75A TO 13A
LOAD STEP
V
OUT0
(20MHz BW)
10mV/DIV
Figure7. Output Voltage V
(V
Range = 0)
OUT0
vs Load Current
OUT0
V
OUT1
(20MHz BW)
50mV/DIV
9.75A TO 13A
LOAD STEP
V
OUT1
(20MHz BW)
10mV/DIV
Figure8. Output Voltage V
(V
Range = 1)
OUT1
vs Load Current
OUT1
Figure9. Output Voltage Ripple at VIN = 12V,
V
= 1V, I
OUT0
Figure11. Thermal Performance at V
OUT0
= 13A
IN
= 12V, V
OUT0
= 1.0V, I
OUT0
= 13A, V
Figure10. Output Voltage Ripple at VIN = 12V,
V
OUT1
OUT1
= 1.8V, I
= 1.8V, I
= 13A
OUT1
= 13A, TA = 24°C, 200LFM Airflow
OUT1
Rev. A
5
DEMO MANUAL DC1811B-B
LTpowerPlay SOFTWARE GUI
LTpowerPlay is a powerful Windows-based development
environment that supports Analog Devices power system management ICs, including the LTM4676A, LTC3880,
LTC3883, LTC2974 and LTC2978. The software supports
a variety of different tasks. You can use LTpowerPlay to
evaluate Analog Devices 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 LTM4676A,
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:
LTpowerPlay
To access technical support documents for ADI Digital
Power Products visit Help. View online help on the
LTpowerPlay menu.
6
Figure12. LTpowerPlay Main Interface
Rev. A
LTpowerPlay QUICK START GUIDE
DEMO MANUAL DC1811B-B
The following procedure describes how to use LTpowerPlay
to monitor and change the settings of LTM4676A.
1. Download and install the LTPowerPlay GUI:
LTpowerPlay
2. Launch the LTpowerPlay GUI.
a. The GUI should automatically identify the
DC1811B-B. 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 LTM4676A is
communicating:
d. If you want to change the output voltage to a differ-
ent value, like 1.5V. In the Config tab, type in 1.5 in
the VOUT_COMMAND box, like this:
c. In the Toolbar, click the “R” (RAM to PC) icon to
read the RAM from the LTM4676A. This reads the
configuration from the RAM of LTM4676A and loads
it into the GUI.
Then, click the “W” (PC to RAM) icon to write these
register values to the LTM4676A. 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:
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.
Rev. A
7
DEMO MANUAL DC1811B-B
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 1 CIN1 CAP., 150µF, 35V, ALUMINUM ELECTR., SUN ELECT., 35CE150AX
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., X7R, 10nF, 16V, 10%,0603 AVX, 0603YC103KAT2A
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, 5 PINS 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 40-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, 10k, 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, LTM4676AEY#PBF ANALOG DEVICES, LTM4676AEY#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,
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-B
RES., OPTIONAL
8
Rev. A
SCHEMATIC DIAGRAM
5
4
3
2
1
D
C
B
A
DEMO MANUAL DC1811B-B
D
JIAN L.PRODUCTION 41-2-61
JIAN L.PRODUCTION 41-2-61
JIAN L.PRODUCTION 41-2-61
VOUT1J6VOUT1
1.8V / 13A
J6
DESCRIPTION DATEAPPROVEDECO REV
DESCRIPTION DATEAPPROVEDECO REV
DESCRIPTION DATEAPPROVEDECO REV
REVISION HISTORY
REVISION HISTORY
REVISION HISTORY
__
__
__
R30R3
0
330uF
330uF
6.3V
COUT4
COUT4
6TPF330M9L
+
+
VOUT1
COUT3
100uF
COUT3
100uF
COUT2
100uF
COUT2
100uF
1210 1210 1210
COUT1
100uF
COUT1
100uF
C2
OPTC2OPT
C1
R2
4.99KR24.99K
2200pFC12200pF
COMP1a
R6
R50R5
VOUT1_SNSE1VOUT1_SNS
E1
VOSNS1
P2P2
OPTR6OPT
0
R4
0805
OPTR4OPT
P1P1
0.035 VIA
TESTPOINTS
GNDJ5GND
GND1_SNSE7GND1_SNS
INTVCCE3INTVCC
E3
J5
C17
OPT
C17
OPT
M3
M2
M1
L3
L2
L1
K3
K2
K1
J3
J2
J1
H9
J9
J8
H8
J5
K5
H1
H2
G1
G2
M5
L10
M12
M11
L12
L11
K12
K11
J12
J11
H12
VIN
VDD33E8VDD33
SYNCE9SYNC
INTVCC
VINH0
C11
1210 1210 1210 1210
35V
SHARE_CLKE6SHARE_CLK
E8
E6
E9
E10
E10
ALERTB
SYNC
SHARE_CLK
R19
10K
R19
10K
R18
10K
R18
10K
R16
10K
R16
10K
R15
10K
R15
10K
R14
10K
R14
10K
VDD33
R13
10K
R13
10K
R12
10K
R12
10K
R11
10K
R11
10K
R10
10K
R10
10K
VDD33
J7
VDD33
VINL
VINH0
VINL
SW0
VINH0
VINH0
VINH0
VINH0
F12
F11
B10
E12
D12
D11
C12
P3P3
R9 0R9 0
E7
R7 0R7 0
VIN
R8 OPTR8 OPT
INTVCC
G9
F9
INTVCC
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOSNS1
VORB1
COMP1b
COMP1a
TSNS1a
TSNS1b
ISNS1b+
ISNS1a+
ISNS1bISNS1a-
SNUB1
SW1
VINH1
VINH1
VINH1
VINH1
VINH1
VINH1
VINH1
VINH1
VINH1
VINH0
VINH0
VINH0
B12
B11
A12
A11
CIN5
10uF
CIN5
10uF
CIN4
10uF
CIN4
10uF
CIN3
10uF
CIN3
10uF
CIN2
10uF
CIN2
10uF
CIN1
CIN1
150uF
150uF
+
+
ALERTB
ALERTB
SYNC
E7
A5
R20
R20
E11
E11
SCL
SHARE_CLK
H7
SYNC
SNUB0
OPT
SCL
SCL
E12
E12
SDA
ALERTB
E5
SHARE_CLK
ISNS0a-
E2
E1
0805
0805
C
SDA
SDA
GPIO1B
GPIO1B
GPIO0B
GPIO0B
E13
E13
E14
E14
GPIO1B
GPIO0B
SDA
GPIO0B
RUN0
GPIO1B
D6
F5
K6
F4
WP
SCL
SDA
GPIO0E4GPIO1
*
U1
U1
LTM4676EY / LTM4676AEY
LTM4676EY / LTM4676AEY
ISNS0b+
TSNS0b
TSNS0a
ISNS0a+
F1
F2
E8
D5
C5
COMP0a
C14
C14
2200pF
2200pF
C15
OPT
C15
OPT
ALERT
ISNS0b-
SCL
E6
RUN0
JP1
JP1
ON
OFF
RUN0
RUN0
2
1
3
R24
10K
R24
10K
VDD25
RUN1
F6
J6
RUN1
RUN0
VDD25
COMP0bD8COMP0a
VOSNS0+
VORB0+
VORB0-
D9
E10
D10
P4P4
P5P5
VOSNS0+
R23 OPTR23 OPT
R22
R22
4.22K
4.22K
0
R250R25
R26 (OPT)R26 (OPT)
ASEL
G4
ASEL
VOSNS0-
E9
VOSNS0-
C16
OPT
C16
OPT
JP2
JP2
ON
RUN1
RUN1
3
2
(OPT)
(OPT)
R29
R29
R28 (OPT)R28 (OPT)
R27 (OPT)R27 (OPT)
VOUT0_CFG
VTRIM0_CFG
FREQ_CFG
H4
H5
G5
VOUT0CFG
VTRIM0CFG
FSWPHCFG
VOUT0A1VOUT0A2VOUT0A3VOUT0
VOUT0B1VOUT0B2VOUT0
B3
100uF
100uF
COUT8
COUT8
1210 1210
100uF
100uF
COUT7
COUT7
1210
COUT6
COUT6
100uF
100uF
6.3V
COUT5
330uF+COUT5
330uF
+
VOUT0
OFF
OFF
1
R30 6.34KR30 6.34K
VOUT1_CFG
G6
VOUT1CFG
VOUT0C2VOUT0
VOUT0
C1
C3
6TPF330M9L
RUN1
R31 0R31 0
VTRIM1_CFG
H6
VTRIM1CFG
VOUT0
D1
D2
B
VDD25
VDD25
E16
E16
U1
LTM4676EY
LTM4676AEY
B - A
B - B
*
DNC
K10
DNC
H11
DNC
E11
DNC
C10
SGND
F8
SGND
F7
SGND
G8
SGND
G7
GND
M10
GND
M9
GND
M8
GND
M7
GND
M6
GND
M4
GND
L9
GND
L8
GND
L7
GND
L6
GND
L5
GND
L4
GND
K9
GND
K8
GND
K7
GND
R33
OPT
R33
OPT
K4
GND
J10
GND
J4
GND
H10
GND
H3
GND
G12
GND
G11
GND
G10
GND
G3
GND
F10
GND
F3
GND
E3
GND
D7
GND
D4
GND
C9
GND
C8
GND
C7
GND
C6
GND
C4
GND
B9
GND
B8
GND
B7
GND
B6
GND
B5
GND
B4
GND
A10
GND
A9
GND
A8
GND
A7
GND
A6
GND
A4
VOUT0
D3
1. ALL RESISTORS ARE 0603.
ALL CAPACITORS ARE 0603.
NOTE: UNLESS OTHERWISE SPECIFIED
WHEN VIN < 5.75V, SHORT INTVCC TO VIN WITH R8 = 0ohm.
*
R32 0R32 0
A
APPROVALS
APPROVALS
APPROVALS
CUSTOMER NOTICE
CUSTOMER NOTICE
CUSTOMER NOTICE
.VER.ON CI
.VER.ON CI
.VER.ON CI
1
1
1
1 3
1 3
1 3
SHEET OF
SHEET OF
SHEET OF
1
LTM4676EY + LTM4676AEY
DEMO CIRCUIT 1811B-A/B
LTM4676EY + LTM4676AEY
DEMO CIRCUIT 1811B-A/B
LTM4676EY + LTM4676AEY
DEMO CIRCUIT 1811B-A/B
Monday, December 01, 2014
Monday, December 01, 2014
Monday, December 01, 2014
SCHEMATIC
SCHEMATIC
SCHEMATIC
DUAL STEP-DOWN uMODULE REGULATOR
DUAL STEP-DOWN uMODULE REGULATOR
DUAL STEP-DOWN uMODULE REGULATOR
WITH POWER SYSTEM MANAGEMENT
B
B
B
SIZE
DATE:
SIZE
DATE:
SIZE
DATE:
TITLE:
TITLE:
TITLE:
HZ
HZ
HZ
JIAN L.
JIAN L.
JIAN L.
SCALE = NONE
SCALE = NONE
PCB DES.
PCB DES.
PCB DES.
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
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
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
SCALE = NONE
APP ENG.
APP ENG.
APP ENG.
2
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.
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.
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.
3
4
5
E17
E15
E2
E4
J10
J10
J9
*
VIN
VIN
4.5V - 26.5V
E5
GNDJ9GND
GNDE5GND
VINE4VIN
GNDE2GND
E15
VOUT0_SNS
VOUT0_SNS
J7
VOUT0J7VOUT0
1.0V / 13A
E17
J8
GNDJ8GND
GND0_SNS
GND0_SNS
Rev. A
9
DEMO MANUAL DC1811B-B
5
4
3
2
1
SCHEMATIC DIAGRAM
C
J3J3
VOUT1
5
4
3
2
1
C22
1uF
C22
1uF
VOUT0 VOUT1
1
J2
R49
R49
R48
R48
C21
C21
VOUT0J2VOUT0
2010
2010
2010
2010
1uF
1uF
2
3
4
5
OPT
OPT
0.5W
0.5W
C24
1uF
C24
1uF
J4
IOSTEPJ4IOSTEP
5
C23
1uF
C23
1uF
Q1
Q1
SUD50N03-09P
SUD50N03-09P
4
2
0
0
1
E20
E20
IOSTEP_CLK
IOSTEP_CLK
4
3
2
1
0.01
0.01
2010
R53
R53
3
R52
10K
R52
10K
E22
E22
GND
GND
HZ
HZ
HZ
.VER.ON CI
.VER.ON CI
.VER.ON CI
1
1
1
2 3
2 3
2 3
1
SHEET OF
SHEET OF
SHEET OF
DEMO CIRCUIT 1811B-A/B
DEMO CIRCUIT 1811B-A/B
DEMO CIRCUIT 1811B-A/B
LTM4676EY / LTM4676AEY
LTM4676EY / LTM4676AEY
LTM4676EY / LTM4676AEY
2
Monday, December 01, 2014
Monday, December 01, 2014
Monday, December 01, 2014
SCHEMATIC
SCHEMATIC
SCHEMATIC
DUAL STEP-DOWN uMODULE REGULATOR
DUAL STEP-DOWN uMODULE REGULATOR
DUAL STEP-DOWN uMODULE REGULATOR
WITH POWER SYSTEM MANAGEMENT
N/A
N/A
N/A
SIZE
DATE:
SIZE
DATE:
SIZE
TITLE:
TITLE:
TITLE:
JIAN L.
JIAN L.
JIAN L.
DATE:
DYNAMIC LOAD CIRCUIT
R51R51
OPT
2010 2010
OPT
R50R50
VOUT0 VOUT1
E24
E24
E23
E23
SGND
SGND
SGND
SGND
BLEEDER LOADS
DO NOT EXCEED 5% DUTY CYCLE!
COMP1a
RUN0RUN1
R41 OPT. R41 OPT.
R38 OPTR38 OPT
R35 OPTR35 OPT
GPIO0B GPIO1B
OPTIONAL JUMPER FOR DUAL PHASE
SINGLE OUTPUT CONFIGURATION
COMP0a
APPROVALS
APPROVALS
APPROVALS
PCB DES.
PCB DES.
PCB DES.
APP ENG.
APP ENG.
APP ENG.
CUSTOMER NOTICE
CUSTOMER NOTICE
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
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
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.
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.
SCALE = NONE
SCALE = NONE
SCALE = NONE
3
4
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN
D D
C
B B
A A
Rev. A
10
SCHEMATIC DIAGRAM
5
4
3
2
1
DEMO MANUAL DC1811B-B
C
RUN0
RUN0
GPIO0B
GPIO1B
R62
OPT
R62
OPT
R61 OPTR61 OPT
R63 0R63 0
SYNC
SHARE_CLK
RUN0
E29
E29
D1
OPTD1OPT
R64
OPT
R64
OPT
D2
OPTD2OPT
R65 0R65 0
3V3
RUN1
RUN1
RUN1
E30
E30
C28
10nF
C28
10nF
R7010R70
10
C27
10nF
C27
10
SCL
SHARE_CLK
AUXP
RESETB
6
8
7
UNUSED
9
10
GND
UNUSED
11
12
10nF
GND
12V
12V
13
14
J12 DEMO HEADER (M)J12 DEMO HEADER (M)
R88
OPT
R88
OPT
R89
OPT
R89
OPT
R82
OPT
R82
OPT
1206
VIN
APPROVALS
APPROVALS
APPROVALS
CUSTOMER NOTICE
CUSTOMER NOTICE
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
R6910R69
CTRL
FAULTB
R68 OPTR68 OPT
R67
R67
ALERTB3SDA
2
5
1
4
OPT
OPT
0
R660R66
R83
OPT
R83
OPT
.VER.ON CI
.VER.ON CI
.VER.ON CI
1
1
1
3 3
3 3
3 3
SHEET OF
SHEET OF
SHEET OF
1
DEMO CIRCUIT 1811B-A/B
DEMO CIRCUIT 1811B-A/B
DEMO CIRCUIT 1811B-A/B
LTM4676EY / LTM4676AEY
LTM4676EY / LTM4676AEY
LTM4676EY / LTM4676AEY
Monday, December 01, 2014
Monday, December 01, 2014
Monday, December 01, 2014
SCHEMATIC
SCHEMATIC
SCHEMATIC
DUAL STEP-DOWN uMODULE REGULATOR
DUAL STEP-DOWN uMODULE REGULATOR
DUAL STEP-DOWN uMODULE REGULATOR
WITH POWER SYSTEM MANAGEMENT
N/A
N/A
N/A
SIZE
DATE:
SIZE
DATE:
SIZE
TITLE:
TITLE:
TITLE:
HZ
HZ
HZ
JIAN L.
JIAN L.
JIAN L.
PCB DES.
PCB DES.
PCB DES.
APP ENG.
APP ENG.
APP ENG.
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
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
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
DATE:
2
SCALE = NONE
SCALE = NONE
SCALE = NONE
3
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SDA SCL
ALL PARTS ON THIS PAGE ARE FOR DEMO BOARD ONLY, NOT NEEDED IN CUSTOMER DESIGN
21
D8D8
VDD33
J13J13
AUX3V4
4
3
AUX3V4
D D
ALERTB
E21
E21
AUXP
AUXP
3V3
2
1
SCL
GND
SDA
TO DC2086A
J1J1
1
SDA
CTRL
FAULTB
ALERTB
SHARE_CLK
4
5
10
6
12
9
7
3
1
2
SDA
AUXP
GND
SCL
ALERTB
LGKPWR
GPIO_1
OUTEN_08OUTEN_1
11
GND
AUXSCL
AUXSDA
C
SCL
RESETB
TO DC1613A
AUXP
UNUSED
UNUSED
C26
C26
GND
GND
14
12V1312V
J11 DEMO HEADER (F)J11 DEMO HEADER (F)
R73
4.99K
R73
4.99K
R72
4.99K
R72
4.99K
100nF
100nF
U3
U3
AUXVCC
8
VCC
A0
1
EEWP
7
WP
A1
2
EESCL
6
SCL
A23VSS
R75 OPTR75 OPT
R74 OPTR74 OPT
EESDA
5
SDA
4
J1, MALE, CONN HEADER 14POS 2MM R/A GOLD, Molex Connector Corp. 87760-1416
PSM STACKING CONNECTORS:
24LC025-I/ST
24LC025-I/ST
OPTIONAL CIRCUIT FOR PROGRAMMING
B B
J2, FEMALE, CONN RECEPT 2MM DUAL R/A 14POS, Sullins Conn. NPPN072FJFN-RC
VDD33
VDD33
23
Q19
Q19
DMP3130L-7
DMP3130L-7
3V3
VIN
WITHOUT VIN
4
R78
15.8k
R78
15.8k
1
R77 10KR77 10K
5
A A
12
9
3
10
11
4
7
2
8
6
5
Rev. A
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.
11
DEMO MANUAL DC1811B-B
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.
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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
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Rev. A
5/19
www.analog.com
12
ANALOG DEVICES, INC. 2015-2019
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