DC1811B-A – LTM4676 Dual Step-Down µModule Regulator with ...
Transcript of DC1811B-A – LTM4676 Dual Step-Down µModule Regulator with ...
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DEMO MANUAL DC1811B-A
Description
LTM4676 Dual Step-Down µModule
Regulator with PMBus Digital Power System Management
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.
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
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
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DEMO MANUAL DC1811B-A
Quick start proceDure
performance summary (TA = 25°C)
PARAMETER 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
Demonstration circuit 1811B-A is easy to set up to evalu-ate 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.
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 rip-ple, 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, sequenc-ing parameters, the fault log, fault responses, GPIOs and other functionality. The DC1613A dongle may be plugged when VIN is present.
Table 1. LTM4676 Demo Cards for Up to 130A Point-of-Load Regulation
MAXIMUM OUTPUT CURRENT NUMBER OF OUTPUT VOLTAGESNUMBER 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
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DEMO MANUAL DC1811B-A
Quick start proceDure
-
VIN 4.5V-‐26.5V A
V
+ -
+
+ -
A + -
Load0 (0~13A)
V + -
Vout0
A + -
Load1 (0~13A)
V + -
Vout1
Figure 2. Proper Measurement Equipment Setup
+ –
VOUT GND
COUT
Figure 3. Measuring Output Voltage Ripple
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DEMO MANUAL DC1811B-A
Quick start proceDure
USB to I2C/PMBus Dongle DC1613A
LTM4676 Demo Board DC1811B-‐A
Input Power Supply
USB Cable VIN
12-‐PIN (J1)
Connector
Load0 Vout0
Vout1 Load1
Figure 4. Demo Setup with PC
LOAD CURRENT (A)0
65
EFFI
CIEN
CY (%
)
70
80
85
90
6 7 8 109 11 12
100
DC1811A F05
75
1 2 3 4 5 13
95
VOUT = 1VVOUT = 1.2VVOUT = 1.5VVOUT = 1.8VVOUT = 2.5VVOUT = 3.3V
VIN = 5V, fSW = 500kHz, CCM
Figure 5. Efficiency vs Load Current at VIN = 5V Figure 6. Efficiency vs Load Current at VIN = 12V
LOAD CURRENT (A)0
65
60
EFFI
CIEN
CY (%
)
70
80
85
90
6 7 8 109 11 12
DC1811A F06
75
1 2 3 4 5 13
95
VOUT = 1VVOUT = 1.2VVOUT = 1.5VVOUT = 1.8VVOUT = 2.5VVOUT = 3.3VVOUT = 5V
VIN = 12VfSW = 500kHzCCM
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DEMO MANUAL DC1811B-A
Quick start proceDure
VOUT0(20MHz BW)
50mV/DIV
9.75A TO 13ALOAD 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)
50mV/DIV
9.75A TO 13ALOAD STEP
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
VOUT1(20MHz BW)
10mV/DIV
Figure 11. Thermal performance at VIN = 12V, VOUT0 = 1.0V, IOUT0 = 13A, VOUT1 = 1.8V, IOUT1 = 13A, TA = 24°C, 200LFM Airflow
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DEMO MANUAL DC1811B-A
Ltpowerplay softWare GuiLTpowerPlay is a powerful Windows-based development environment that supports Linear Technology power sys-tem 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 mul-tichip 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
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DEMO MANUAL DC1811B-A
Ltpowerplay Quick start GuiDeThe following procedure describes how to use LTpowerPlay to monitor and change the settings of LTM4676.
1. Download and install the LTPowerPlay GUI:
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:
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.
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:
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.
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:
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DEMO MANUAL DC1811B-A
parts ListITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components1 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., 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 Components1 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)
RES., OPTIONAL
4 0 R50, R51(OPT) RES., CHIP, 30, 1%, 2512
Hardware-For Demo Board Only1 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
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DEMO MANUAL DC1811B-A
schematic DiaGram5 5
4 4
3 3
2 2
1 1
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CTI
ON
16-
2-14
__
E13
GPI
O0B
E13
GPI
O0B
E4VI
NE4
VIN
CO
UT1
100u
FC
OU
T110
0uF
CIN
310
uFC
IN3
10uF
J7VO
UT0
J7VO
UT0
R18
10K
R18
10K
CIN
210
uFC
IN2
10uF
R9
0R
90
E9SY
NC
E9SY
NC
R10
10K
R10
10K
R7
0R
70
E17
GN
D0_
SNS
E17
GN
D0_
SNS
R4
OPTR4
OPT
R33
OPT
R33
OPT
CO
UT7
100u
FC
OU
T710
0uF
R8
OPT
R8
OPT
C2
OPTC2
OPT
J10
VIN
J10
VIN
CIN
510
uFC
IN5
10uF
J5
GN
D
J5
GN
D
E16
VDD
25E1
6VD
D25
R14
10K
R14
10K
R32
0R
320
CO
UT8
100u
FC
OU
T810
0uF
C14
2200
pFC
1422
00pF
C1
2200
pFC
122
00pF
+C
OU
T533
0uF
+C
OU
T533
0uF
P1P1
R24
10K
R24
10K
U1
LTM
4676
EY
/ LT
M46
76A
EY
U1
LTM
4676
EY
/ LT
M46
76A
EY
VO
UT0
A1
VO
UT0
A2
VO
UT0
A3
VO
UT0
D1
ISN
S0b
-E
1
ISN
S0b
+F1
ISNS1b-G1
ISNS1b+H1
VOUT1J1
VOUT1J2
VOUT1J3
VOUT1K1
VO
UT0
B1
VO
UT0
B2
VO
UT0
B3
VO
UT0
D2
ISN
S0a
-E
2
ISN
S0a
+F2
ISNS1a-G2
ISNS1a+H2
VOUT1K2
VOUT1K3
VOUT1L1
VOUT1L2
VO
UT0
C1
VO
UT0
C2
VO
UT0
C3
VO
UT0
D3
GNDA4
GNDA6
GNDA7
GNDA8
VOUT1L3
VOUT1M1
VOUT1M2
VOUT1M3
GNDA9
GNDA10
GNDB4
GNDB5
AS
EL
G4
FSW
PH
CFG
H4
GNDB6
GNDB7
GNDB8
GNDB9
GP
IO0
E4
GP
IO1
F4
SN
UB
0A
5
GNDC4
TSN
S0b
C5
TSN
S0a
D5
ALE
RT
E5
RU
N0
F5
VO
UT0
CFG
G5
VTR
IM0C
FGH
5TSNS1a
J5TSNS1b
K5
GNDC6
SNUB1M5
GNDC7
GNDC8
GNDC9
SD
AD
6S
CL
E6
RU
N1
F6
VO
UT1
CFG
G6
VTR
IM1C
FGH
6
VD
D25
J6
WP
K6
GNDD4
GNDE3
GNDF3
GNDF10
GNDG3
GNDG10
SY
NC
E7
GNDM9
GNDM10
SH
AR
E_C
LKH
7
VD
D33
J7
GNDG11
GNDG12
GNDL8GNDL7
GNDL9
GNDH3
CO
MP
0bD
8C
OM
P0a
E8
SGNDF7
SGNDF8
COMP1aH8
COMP1bJ8
GNDH10
GNDJ4
GNDM8
VO
SN
S0+
D9
VO
SN
S0-
E9
INTV
CC
F9
INTV
CC
G9
VOSNS1H9
VORB1J9
GNDJ10
GNDL4
GNDL5
GNDK4
SW
0B
10
DNCE11
VO
RB
0+D
10
VO
RB
0-E
10
GNDL6
GNDK7
GNDK8
GNDK9
DNCC10
SW1L10
GNDM4
VIN
H0
B12
VIN
H0
B11
VIN
H0
A12
VIN
H0
A11
DNCK10
VIN
LF1
2
GNDM6
DNCH11
VINH1H12
VINH1J11
VINH1J12
VINH1K11
VIN
H0
E12
VIN
H0
D12
VIN
H0
D11
VIN
H0
C12
VIN
H0
C11
VIN
LF1
1
GNDM7
VINH1K12
VINH1L11
VINH1L12
VINH1M11
VINH1M12
SGNDG7
SGNDG8
GNDD7
R30
6.34
KR
306.
34K
E7G
ND
1_SN
SE7
GN
D1_
SNS
R29
(OPT
)R
29(O
PT)
R16
10K
R16
10K
E8VD
D33
E8VD
D33
CO
UT6
100u
FC
OU
T610
0uF
E12
SDA
E12
SDA
C15
OPT
C15
OPT
R20
0805
R20
0805
P2P2
J8
GN
D
J8
GN
D
R25 0R25 0
P4P4
C17
OPT
C17
OPT
R11
10K
R11
10K
+C
OU
T433
0uF
+C
OU
T433
0uF
R19
10K
R19
10K
P5P5
R23
OPT
R23
OPT
R3
0R3
0
E14
GPI
O1B
E14
GPI
O1B
CO
UT3
100u
FC
OU
T310
0uF
E15
VOU
T0_S
NS
E15
VOU
T0_S
NS
CO
UT2
100u
FC
OU
T210
0uF
J9
GN
D
J9
GN
D
R6
OPT
R6
OPT
R27
(OPT
)R
27(O
PT)
E3
INTV
CC
E3
INTV
CC
+C
IN1
150u
F+
CIN
115
0uF
R15
10K
R15
10K
R5
0R5
0
R2
4.99
KR
24.
99K
E1VO
UT1
_SN
SE1
VOU
T1_S
NS
E10
ALER
TBE1
0AL
ERTB
JP1
RU
N0
JP1
RU
N0
13 2
R13
10K
R13
10K
E11
SCL
E11
SCL
R22
4.22
KR
224.
22K
R12
10K
R12
10K
E6SH
ARE_
CLK
E6SH
ARE_
CLK
P3P3
CIN
410
uFC
IN4
10uF
JP2
OFF
RU
N1
JP2
OFF
RU
N1
13 2
R28
(OPT
)R
28(O
PT)
E2G
ND
E2G
ND
C16
OPT
C16
OPT
J6VO
UT1
J6VO
UT1
R31
0R
310
R26
(OPT
)R
26(O
PT)
E5G
ND
E5G
ND
10dc1811baf
DEMO MANUAL DC1811B-A
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 representa-tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
schematic DiaGram5 5
4 4
3 3
2 2
1 1
DD
CC
BB
AA
ALL
PA
RTS
ON
TH
IS P
AG
E A
RE
FO
R D
EM
O O
NLY
, NO
T N
EE
DE
D IN
CU
STO
ME
R D
ES
IGN
OP
T20
1020
10O
PT
VO
UT1
DYN
AMIC
LO
AD C
IRC
UIT
DO
NO
T E
XC
EE
D 5
% D
UTY
CY
CLE
!
BLEEDER LOADS
OPTIONAL JUMPER FOR DUAL PHASE
SINGLE OUTPUT CONFIGURATION
2010
WIT
H P
OW
ER S
YSTE
M M
AN
AG
EMEN
T
VO
UT0
VO
UT1
VO
UT0
VO
UT1
CO
MP
0aC
OM
P1a
GP
IO0B
GP
IO1B
RU
N0
RU
N1
SIZE
DA
TE:
IC N
O.
RE
V.
SHEE
TO
F
TITL
E:
APP
RO
VALS
PCB
DES
.
APP
EN
G.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA
950
35P
hone
: (40
8)43
2-19
00
1630
McC
arth
y B
lvd.
LTC
Con
fiden
tial-F
or C
usto
mer
Use
Onl
y
CU
STO
MER
NO
TIC
ELI
NEA
R T
ECH
NO
LOG
Y H
AS
MA
DE
A B
EST
EFFO
RT
TO D
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N A
CIR
CU
IT T
HA
T M
EETS
CU
STO
MER
-SU
PPLI
ED S
PEC
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ATI
ON
S;H
OW
EVER
, IT
REM
AIN
S TH
E C
UST
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ER'S
RES
PON
SIB
ILIT
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VER
IFY
PRO
PER
AN
D R
ELIA
BLE
OPE
RA
TIO
N IN
TH
E A
CTU
AL
APP
LIC
ATI
ON
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OM
PON
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SUB
STIT
UTI
ON
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D P
RIN
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CIR
CU
IT B
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RD
LA
YOU
T M
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SIG
NIF
ICA
NTL
Y A
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T C
IRC
UIT
PER
FOR
MA
NC
E O
R R
ELIA
BIL
ITY.
CO
NTA
CT
LIN
EAR
TEC
HN
OLO
GY
APP
LIC
ATI
ON
S EN
GIN
EER
ING
FO
R A
SSIS
TAN
CE.
THIS
CIR
CU
IT IS
PR
OPR
IETA
RY
TO L
INEA
R T
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NO
LOG
Y A
ND
SC
HE
MA
TIC
SUPP
LIED
FO
R U
SE W
ITH
LIN
EAR
TEC
HN
OLO
GY
PAR
TS.
SC
ALE
= N
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E
ww
w.li
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.com 1
Frid
ay, O
ctob
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4, 2
014
23
DU
AL
STEP
-DO
WN
uM
OD
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REG
ULA
TOR
HZ
JIA
N L
.
N/A
LTM
4676
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LTM
4676
AEY
DEM
O C
IRC
UIT
181
1BSI
ZE
DA
TE:
IC N
O.
RE
V.
SHEE
TO
F
TITL
E:
APP
RO
VALS
PCB
DES
.
APP
EN
G.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA
950
35P
hone
: (40
8)43
2-19
00
1630
McC
arth
y B
lvd.
LTC
Con
fiden
tial-F
or C
usto
mer
Use
Onl
y
CU
STO
MER
NO
TIC
ELI
NEA
R T
ECH
NO
LOG
Y H
AS
MA
DE
A B
EST
EFFO
RT
TO D
ESIG
N A
CIR
CU
IT T
HA
T M
EETS
CU
STO
MER
-SU
PPLI
ED S
PEC
IFIC
ATI
ON
S;H
OW
EVER
, IT
REM
AIN
S TH
E C
UST
OM
ER'S
RES
PON
SIB
ILIT
Y TO
VER
IFY
PRO
PER
AN
D R
ELIA
BLE
OPE
RA
TIO
N IN
TH
E A
CTU
AL
APP
LIC
ATI
ON
. C
OM
PON
ENT
SUB
STIT
UTI
ON
AN
D P
RIN
TED
CIR
CU
IT B
OA
RD
LA
YOU
T M
AY
SIG
NIF
ICA
NTL
Y A
FFEC
T C
IRC
UIT
PER
FOR
MA
NC
E O
R R
ELIA
BIL
ITY.
CO
NTA
CT
LIN
EAR
TEC
HN
OLO
GY
APP
LIC
ATI
ON
S EN
GIN
EER
ING
FO
R A
SSIS
TAN
CE.
THIS
CIR
CU
IT IS
PR
OPR
IETA
RY
TO L
INEA
R T
ECH
NO
LOG
Y A
ND
SC
HE
MA
TIC
SUPP
LIED
FO
R U
SE W
ITH
LIN
EAR
TEC
HN
OLO
GY
PAR
TS.
SC
ALE
= N
ON
E
ww
w.li
near
.com 1
Frid
ay, O
ctob
er 2
4, 2
014
23
DU
AL
STEP
-DO
WN
uM
OD
ULE
REG
ULA
TOR
HZ
JIA
N L
.
N/A
LTM
4676
EY /
LTM
4676
AEY
DEM
O C
IRC
UIT
181
1BSI
ZE
DA
TE:
IC N
O.
RE
V.
SHEE
TO
F
TITL
E:
APP
RO
VALS
PCB
DES
.
APP
EN
G.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA
950
35P
hone
: (40
8)43
2-19
00
1630
McC
arth
y B
lvd.
LTC
Con
fiden
tial-F
or C
usto
mer
Use
Onl
y
CU
STO
MER
NO
TIC
ELI
NEA
R T
ECH
NO
LOG
Y H
AS
MA
DE
A B
EST
EFFO
RT
TO D
ESIG
N A
CIR
CU
IT T
HA
T M
EETS
CU
STO
MER
-SU
PPLI
ED S
PEC
IFIC
ATI
ON
S;H
OW
EVER
, IT
REM
AIN
S TH
E C
UST
OM
ER'S
RES
PON
SIB
ILIT
Y TO
VER
IFY
PRO
PER
AN
D R
ELIA
BLE
OPE
RA
TIO
N IN
TH
E A
CTU
AL
APP
LIC
ATI
ON
. C
OM
PON
ENT
SUB
STIT
UTI
ON
AN
D P
RIN
TED
CIR
CU
IT B
OA
RD
LA
YOU
T M
AY
SIG
NIF
ICA
NTL
Y A
FFEC
T C
IRC
UIT
PER
FOR
MA
NC
E O
R R
ELIA
BIL
ITY.
CO
NTA
CT
LIN
EAR
TEC
HN
OLO
GY
APP
LIC
ATI
ON
S EN
GIN
EER
ING
FO
R A
SSIS
TAN
CE.
THIS
CIR
CU
IT IS
PR
OPR
IETA
RY
TO L
INEA
R T
ECH
NO
LOG
Y A
ND
SC
HE
MA
TIC
SUPP
LIED
FO
R U
SE W
ITH
LIN
EAR
TEC
HN
OLO
GY
PAR
TS.
SC
ALE
= N
ON
E
ww
w.li
near
.com 1
Frid
ay, O
ctob
er 2
4, 2
014
23
DU
AL
STEP
-DO
WN
uM
OD
ULE
REG
ULA
TOR
HZ
JIA
N L
.
N/A
LTM
4676
EY /
LTM
4676
AEY
DEM
O C
IRC
UIT
181
1B
R52
10K
R52
10K
R38
OP
TR
38O
PT
E22
GN
DE
22G
ND
J3J31
2345
R50
R50
Q1
SU
D50
N04
Q1
SU
D50
N04
2
1
34
R49
2010
OP
T
R49
2010
OP
T
J4
IOS
TEP
J4
IOS
TEP
1
2345
E23
SG
ND
E23
SG
ND
R48
2010
0.5W 0R48
2010
0.5W 0
R35
OP
TR
35O
PT
J2
VO
UT0J2
VO
UT0
1
2345
C24
1uF
C24
1uF
C22
1uF
C22
1uF
R41
OP
T.
R41
OP
T.
E20
IOS
TEP
_CLK
E20
IOS
TEP
_CLK
R51
R51
E24
SG
ND
E24
SG
ND
C21
1uF
C21
1uF
R53 0.01
R53 0.01
C23
1uF
C23
1uF
11dc1811baf
DEMO MANUAL DC1811B-A
schematic DiaGram5 5
4 4
3 3
2 2
1 1
DD
CC
BB
AA
J1, MALE, CONN HEADER 14POS 2MM R/A GOLD, Molex Connector Corp. 87760-1416
J2, FEMALE, CONN RECEPT 2MM DUAL R/A 14POS, Sullins Conn. NPPN072FJFN-RC
TO D
C16
13A
ALL
PA
RTS
ON
TH
IS P
AG
E A
RE
FO
R D
EM
O B
OA
RD
ON
LY, N
OT
NE
ED
ED
IN C
US
TOM
ER
DE
SIG
N
PSM STACKING CONNECTORS:
OPTIONAL CIRCUIT FOR PROGRAMMING
WITHOUT VIN
1206
TO D
C20
86A
WIT
H P
OW
ER S
YSTE
M M
AN
AG
EMEN
T
AU
XV
CC
EE
WP
EE
SD
A
EE
SC
L
AU
X3V
4
3V3
VIN3V
3V
DD
33
VIN
3V3
VD
D33
ALE
RTB
SD
AS
CL
RU
N0
RU
N1
GP
IO1B
GP
IO0B
SY
NC
SH
AR
E_C
LK
VD
D33
SIZE
DA
TE:
IC N
O.
RE
V.
SHEE
TO
F
TITL
E:
APP
RO
VALS
PCB
DES
.
APP
EN
G.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA
950
35P
hone
: (40
8)43
2-19
00
1630
McC
arth
y B
lvd.
LTC
Con
fiden
tial-F
or C
usto
mer
Use
Onl
y
CU
STO
MER
NO
TIC
ELI
NEA
R T
ECH
NO
LOG
Y H
AS
MA
DE
A B
EST
EFFO
RT
TO D
ESIG
N A
CIR
CU
IT T
HA
T M
EETS
CU
STO
MER
-SU
PPLI
ED S
PEC
IFIC
ATI
ON
S;H
OW
EVER
, IT
REM
AIN
S TH
E C
UST
OM
ER'S
RES
PON
SIB
ILIT
Y TO
VER
IFY
PRO
PER
AN
D R
ELIA
BLE
OPE
RA
TIO
N IN
TH
E A
CTU
AL
APP
LIC
ATI
ON
. C
OM
PON
ENT
SUB
STIT
UTI
ON
AN
D P
RIN
TED
CIR
CU
IT B
OA
RD
LA
YOU
T M
AY
SIG
NIF
ICA
NTL
Y A
FFEC
T C
IRC
UIT
PER
FOR
MA
NC
E O
R R
ELIA
BIL
ITY.
CO
NTA
CT
LIN
EAR
TEC
HN
OLO
GY
APP
LIC
ATI
ON
S EN
GIN
EER
ING
FO
R A
SSIS
TAN
CE.
THIS
CIR
CU
IT IS
PR
OPR
IETA
RY
TO L
INEA
R T
ECH
NO
LOG
Y A
ND
SC
HE
MA
TIC
SUPP
LIED
FO
R U
SE W
ITH
LIN
EAR
TEC
HN
OLO
GY
PAR
TS.
SC
ALE
= N
ON
E
ww
w.li
near
.com 1
Tues
day,
Jul
y 22
, 201
43
3
DU
AL
STEP
-DO
WN
uM
OD
ULE
REG
ULA
TOR
HZ
JIA
N L
.
N/A
LTM
4676
EY /
LTM
4676
AEY
DEM
O C
IRC
UIT
181
1BSI
ZE
DA
TE:
IC N
O.
RE
V.
SHEE
TO
F
TITL
E:
APP
RO
VALS
PCB
DES
.
APP
EN
G.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA
950
35P
hone
: (40
8)43
2-19
00
1630
McC
arth
y B
lvd.
LTC
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12dc1811baf
DEMO MANUAL DC1811B-A
Linear Technology Corporation1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2014
LT 1114 • PRINTED IN USA
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 applica-tion engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation