Linear DC2053A Quick setup guide

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DEMO MANUAL DC2053A
DESCRIPTION
LTM4675EY
Dual Step-Down µModule Regulator
with PMBus Power System Management
Demonstration circuit 2053A is a dual-output, high ef-
ficiency, high density, µModule
®
regulator, operating
from a 4.5V to 17V input range. Each output can supply
9A maximum load current. The demo board features the
LTM4675 a dual 9A or single 18A step-down regulator
withPMBusdigitalpowersystemmanagement.Pleasesee
the LT M
®
4675 data sheet for more detailed information.
The DC2053A powers up and regulates its outputs accord-
ing to the LTM4675's factory-default EEPROM settings.
Configuration resistors pin-straps can set device switch-
ing frequency and output voltage, if desired. Serial bus
communication is not needed to configure or evaluate the
LTM4675, facilitating quick set up and easy lab evaluation
oftheDC/DCconverter.To fullyexplore the extensive DPSM
features of the part, install the GUI software LTpowerPlay™
onto your PC and use LT C ’s I2C/SMBus/PMBus dongle
L, LT, LTC, LTM, Linear Technology, µModule 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
DC1613A to connect to the board. LTpowerPlay allows
the user to reconfigure the part on the fly and store the
configuration in the module’s EEPROM, view telemetry of
voltage, current, temperature and fault status, and more.
GUI Download
The software can be downloaded from:
http://www.linear.com/ltpowerplay
For more details and instructions on LTpowerPlay, please
refer to the LTpowerPlay GUI for LTM4675 Quick Start
Guide.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2053A
Figure 1. Dual-Output LTM4675/DC2053A Demo Circuit

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DEMO MANUAL DC2053A
QUICK START PROCEDURE
Demonstration circuit 2053A is easy to set up to evaluate
the performance of the LTM4675EY. 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 17V) and GND (input return).
2. Connect the 1V 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 1V±0.5%, and VOUT1
should be 1.8 ±0.5%.
6. Once the proper output voltages are established, ad-
just 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 LTM4675
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 DC2053A
You can use a LTpowerPlay on a PC to reconfigure the
power management features of the LTM4675 such as:
nominal VOUT, margin set points, OV/UV limits, tempera-
ture fault limits, sequencing parameters, the fault log, fault
responses, GPIOs and more. The DC1613A dongle may
be plugged when VIN is present.
PERFORMANCE SUMMARY
Specifications are at TA= 25°C
PARAMETER CONDITIONS VALUE
Input Voltage Range 4.5V to 17V
Output Voltage, VOUT0 VIN = 4.5V – 17V, IOUT0 = 0A to 9A 0.5V to 5.5V, Default: 1V
Maximum Output Current, IOUT0 VIN = 4.5V – 17V, VOUT = 0.5V to 5.5V 9A
Output Voltage, VOUT1 VIN = 4.5V – 17V, IOUT1 = 0A to 9A 0.5V to 5.5V, Default: 1.8V
Maximum Output Current, IOUT1 VIN = 4.5V – 17V, VOUT = 0.5V to 5.5V 9A
Typical Efficiency VIN = 12V, VOUT = 1.8V, IOUT = 9A 85.3%
Default Switching Frequency 500kHz

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DEMO MANUAL DC2053A
Figure 2. Proper Measurement Equipment Setup
Figure 3. Measuring Output Voltage Ripple
QUICK START PROCEDURE
+ –
VOUT GND
COUT

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DEMO MANUAL DC2053A
QUICK START PROCEDURE
Figure 4. Demo Setup with PC
Figure 5. Efficiency vs Load Current at VIN = 5V
LOAD CURRENT (A)
0
EFFICIENCY (%)
90
85
95
80
75
70
65 4 82 6
DC2053a F05
93 71 5
VOUT = 3.3V, 650kHz
VOUT = 2.5V, 650kHz
VOUT = 1.8V, 650kHz
VOUT = 1.5V, 575kHz
VOUT = 1.2V, 500kHz
VOUT = 1V, 500kHz
VOUT = 0.9V, 425kHz

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DEMO MANUAL DC2053A
QUICK START PROCEDURE
Figure 7. Output Voltage VOUT0 vs Load Current (VOUT0 RANGE = 0)
Figure 6. Efficiency vs Load Current at VIN = 12V
LOAD CURRENT (A)
0
EFFICIENCY (%)
95
90
80
85
75
70
65
60 4 82 6
DC2053a F06
93 71 5
VOUT = 5V, 1MHz
VOUT = 3.3V, 650kHz
VOUT = 2.5V, 650kHz
VOUT = 1.8V, 650kHz
VOUT = 1.5V, 575kHz
VOUT = 1.2V, 500kHz
VOUT = 1V, 500kHz
VOUT = 0.9V, 425kHz
DC2053a F07
4A TO 9A
LOAD STEP
VOUT0
20MHz BW
20mV/DIV

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DEMO MANUAL DC2053A
QUICK START PROCEDURE
Figure 9. Output Voltage Ripple at VIN = 12V, VOUT0 = 1V, IOUT0 = 9A
Figure 8. Output Voltage VOUT1 vs Load Current (VOUT1 RANGE = 0)
DC2053a F08
4A TO 9A
LOAD STEP
VOUT1
20MHz BW
20mV/DIV
DC2053a F09
VOUT0
20MHz BW
10mV/DIV

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DEMO MANUAL DC2053A
QUICK START PROCEDURE
Figure 10. Output Voltage Ripple at VIN = 12V, VOUT0 = 1.8V, IOUT0 = 9A
Figure 11. Thermal Performance at VIN = 12V, VOUT0 = 1V, IOUT0 = 9A,
VOUT1 = 1.8V, IOUT1 = 9A, TA= 24°C, No Airflow
DC2053a F10
VOUT1
20MHz BW
20mV/DIV

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DEMO MANUAL DC2053A
LTpowerPlay SOFTWARE GUI
LTpowerPlay is a powerful Windows based development
environment that supports Linear Technology power sys-
tem management ICs, including the LTM4675, 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
latertime. LTpowerPlayprovidesunprecedented 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
LT C PSM modules and ICs. The software also provides
an automatic update feature to keep the software current
with the latest set of device drivers and documentation.
The LTpowerPlay software can be downloaded from:
http://linear.com/ltpowerplay
To access technical support documents for LT C Digital
Power Products visit the LTpowerPlay Help menu. Online
help also available through the LTpowerPlay.
Figure 12. LTpowerPlay Main Interface

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DEMO MANUAL DC2053A
LTpowerPlay QUICK START PROCEDURE
Thefollowing procedure describes how to use LTpowerPlay
to monitor and change the settings of LTM4675.
1. Download and install the LTpowerPlay GUI:
http://linear.com/ltpowerplay
2. Launch the LTpowerPlay GUI.
a. The GUI should automatically identify the DC2053A.
Thesystem tree on the lefthandside should look like this:
b. A green message box shows for a few seconds in
the lower left hand corner, confirming that LTM4675
is communicating:
c. In the Toolbar, click the R (RAM to PC) icon to read
the RAM from the TM4675. This reads the configuration
from the RAM of LTM4675 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, and strike the enter key, as
shown:
Then, click the W (PC to RAM) icon to write these register
values to the LTM4675. After finishing this step, you will
see the output voltage will change to 1.5V.
Ifthe writeissuccessful, you willsee the followingmessage:
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.

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DEMO MANUAL DC2053A
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 2 CIN2, CIN4 CAP, X5R, 10µF, 35V, 10%,1210 MURATA, GRM32ER6YA106KA12
3 6 COUT1 TO COUT3, COUT6 TO COUT8 CAP, X5R, 100µF, 6.3V, 20% 1210 AVX, 12106D107MAT2A
4 2 COUT4, COUT5 CAP, 470µF, 6.3V, POSCAP, D4 SANYO, 6TPF470MAH
5 2 C27, C28 CAP, X5R, 10nF, 25V,10%, 0603 AVX , 06033D103KAT2A
6 3 C21, C22, C24 CAP, X5R, 1µF, 25V,10%, 0603 YAGEO, CC0603KRX5R8BB105
7 1 C23 CAP, X7R, 1µF, 25V,10%, 0805 TAIYO, YUDEN,TDK212BJ105KD-T
8 1 C26 CAP, X5R, 100nF, 25V,10%, 0603 AVX , 06033D104KAT2A
9 2 JP1, JP2 HEADER 3 PIN 0.079 SINGLE ROW SAMTEC, TMM103-02-L-S
10 1 J1 CONN HEADER 14POS 2MM R/A GOLD MOLEX, 87760-1416
11 1 J2 CONN RECEPT 2MM DUAL R/A 14POS SULLINS, NPPN072FJFN-RC
12 3 J3, J4, J12 CONN, BNC, 5PINS CONNEX, 112404
13 1 J11 CONN HEADER 12POS 2MM STR DL PCB FCI 98414-G06-12ULF
14 6 J5 TO J10 BANANA SMALL KEYSTONE, 575-4
15 1 Q1 N-CHANNEL 30-V MOSFET VISHAY, SUD50N03-09P
16 1 Q19 MOSFET P-CH 30V 3.5A SOT-23 DIODES, DMP3130L-7
17 12 R3, R5 TO R7, R9, R23, R25, R31, R32,
R63, R65, R66
RES, CHIP, 0, 1%, 0603 VISHAY, CRCW06030000Z0EA
18 12 R10 TO R16, R18, R19, R24, R52, R77 RES, CHIP, 10k, 1%, 0603 VISHAY, CRCW060310K0FKEA
19 1 R30 RES, CHIP, 6.34k, 1%, 0603 VISHAY, CRCW06036K34FKEA
20 2 R72, R73 RES, CHIP, 4.99k, 1%, 0603 VISHAY, CRCW06034K99FKEA
21 1 R48 RES, CHIP, 0, 0.5W, 2010 NIC, NRC50ZOTRF
22 1 R53 RES, CHIP, 0.01, 1/2W, 1%, 2010 IRC, LRF2010LF-01-R010-F
23 2 R69, R70 RES, CHIP, 10, 1%, 0603 VISHAY, CRCW060310R0FKEA
24 1 R78 RES, CHIP, 15.8k, 1%, 0603 VISHAY, CRCW060315K8FKEA
25 1 U1 IC, LTM4675EY#PBF LINEAR TECHNOLOGY LTM4675EY#PBF
26 1 U3 IC, 24LC025-1/ST TSSOP MICROCHIP, 24LC025-1/ST
Additional Demo Board Circuit Components
1 0 CIN3, CIN5 (OPT) CAP, 1210
2 0 C1, C2, C14 TO C17 (OPT) CAP, 0603
3 0 D1, D2 (OPT) DIODE
4 0 R2, R8, R22, R26 TO R29, R33, R35, R38,
R41, R49 (OPT)
RES, OPTIONAL
5 R61, R62, R64, R67, R68, R74, R75, R82,
R83, R88
6 0 R50, R51 (OPT) RES, CHIP, 30, 1%, 2512
Hardware: For Demo Board Only
1 24 E1 TO E17, E20 TO E24, E29, E30 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 KEYSTONE, 8833 (SNAP ON)
4 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 2053A

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DEMO MANUAL DC2053A
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D D C C B B A A
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE 0603. ALL CAPACITORS ARE 0603.
35V
4.5V - 17V
1.0V / 9A
6.3V
6TPF470MAH
OPT
1.8 / 9A
ON
ON
6.3V
6TPF470MAH
1210 1210 1210
OFF
1210 1210 1210 1210
1210 1210 1210
0.035 VIA TESTPOINTS
WITH POWER SYSTEM MANAGEMENT
WHEN VIN < 5.75V, SHORT INTVCC TO VIN WITH R8 = 0ohm.
*
PRODUCTION2 1-20-15
DEMO CIRCUIT 2053A
VOSNS0-
VDD33
SYNC SHARE_CLK ALERTB SCL SDA GPIO0B GPIO1B ASEL FREQ_CFG VOUT0_CFG VTRIM0_CFG VOUT1_CFG VTRIM1_CFG RUN1 VDD25 RUN0 INTVCC
VIN
VOUT0
VOUT1
VIN
SYNC SHARE_CLK
ALERTB
SCL SDA
GPIO0B
GPIO1B
COMP0a
COMP1a
RUN0 RUN1
VDD33
VOSNS0+
VOSNS1
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
Monday, March 23, 2015
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DUAL STEP-DOWN uMODULE REGULATOR
HZ
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B
LTM4675EY
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
Monday, March 23, 2015
13
DUAL STEP-DOWN uMODULE REGULATOR
HZ
YINGYI Y.
B
LTM4675EY
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
Monday, March 23, 2015
13
DUAL STEP-DOWN uMODULE REGULATOR
HZ
YINGYI Y.
B
LTM4675EY
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
YINGYI Y.
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
YINGYI Y.
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
YINGYI Y.
E13
GPIO0B
E4
VIN
COUT1 100uF
CIN3 OPT
J7
VOUT0
R18 10K
CIN2 10uF
R9 0 E9
SYNC
R10 10K
R7 0
E17
GND0_SNS
R33 OPT
COUT7
100uF
R8 OPT
C2
OPT
J10
VIN
CIN5 OPT
J5
GND
E16
VDD25
R14 10K
R32 0
COUT8
100uF
C14 OPT
C1
OPT
+
COUT5 470uF
P1
R24 10K
U1
LTM4675EY
VOUT0
A1
VOUT0
B1
VOUT0
C1
VOUT0
D1
GND
A2
GND
A3
GND
A4
GND
A5
VOUT1 J1
VOUT1 K1
VOUT1 L1
VOUT1 M1
GND
A6
GND
A7
GND
A8
GND
B2
ASEL G2
FREQ_CFG H2
GND
B3
GND
B4
GND
B5
GND
B6
GPIO0 E2 GPIO1 F2
GND
B7
TSNS0
C3
TSNS0
D3
ALERT E3
RUN0 F3
VOUT0_CFG G3
VTRIM0_CFG H3
TSNS1a J3
TSNS1b K3
GND
C2
GND
C4
GND
C5
GND
C6
SDA D4
SCL E4
RUN1 F4
VOUT1_CFG G4
VTRIM1_CFG H4
VDD25 J4
WP K4
GND
C7
GND
C8
GND
D2
GND
D5
GND
E1
GND
E9
SYNC E5
SGND
F5
SGND
F6
SHARE_CLK H5
VDD33 J5
GND
F1
GND
F8
GND
G1
GND
G8
GND
G9
GND
H1
COMP0b
D6
COMP0a
E6
SGND
G5
SGND
G6
COMP1a H6
COMP1b J6
GND
H8
GND
H9
GND
J2
GND
J8
GND
K2
GND
K5
VOSNS0+
D7
VOSNS0-
E7
INTVCC F7 INTVCC G7
VOSNS1 H7
VORB1 J7
GND
K6
GND
K7
GND
K8
GND
L2
SW0
B8
VORB0+
D8
VORB0-
E8
GND
L3
GND
L4
GND
L5
GND
L6
SW1 L8
GND
L7
VINH0
D9 VINH0 C9 VINH0
B9 VINH0 A9
GND
M2
VINH1 J9
VINH1 K9
VINH1 L9
VINH1 M9
VINL
F9
GND
M3
GND
M4
GND
M5
GND
M6
GND
M7
GND
M8
R30 6.34K
E7
GND1_SNS
R29 (OPT)
R16 10K
E8
VDD33
COUT6
100uF
E12
SDA
C15 OPT
P2
J8
GND
R25
0
P4
C17 OPT
R11 10K
+
COUT4
470uF
R19 10K
P5
R23 0
R3 0
E14
GPIO1B
COUT3 100uF
E15
VOUT0_SNS
COUT2 100uF
J9
GND
R6 0
R27 (OPT)
E3
INTVCC
+
CIN1 150uF
R15 10K
R5 0
R2 OPT
E1
VOUT1_SNS
E10
ALERTB
JP1
RUN0
1 3 2
R13 10K
E11
SCL
R22 OPT
R12 10K
E6
SHARE_CLK
P3
CIN4 10uF
JP2
OFF
RUN1
1 3 2
R28 (OPT)
E2
GND
C16 OPT
J6 VOUT1
R31 0 R26 (OPT)
E5
GND

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DEMO MANUAL DC2053A
SCHEMATIC DIAGRAM
5 5
4 4
3 3
2 2
1 1
D D C C B B A A
ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN
OPT
2010 2010 OPT
VOUT1
DYNAMIC LOAD CIRCUIT DO NOT EXCEED 5% DUTY CYCLE!
BLEEDER LOADS
OPTIONAL JUMPER FOR DUAL PHASE SINGLE OUTPUT CONFIGURATION
2010
WITH POWER SYSTEM MANAGEMENT
DEMO CIRCUIT 2053A
VOUT0
VOUT0 VOUT1
VOUT0 VOUT1
COMP0a COMP1a
GPIO0B GPIO1B
RUN0RUN1
VOSNS0+ VOSNS1
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
Monday, March 23, 2015
23
DUAL STEP-DOWN uMODULE REGULATOR
HZ
YINGYI Y.
N/A
LTM4675EY
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
Monday, March 23, 2015
23
DUAL STEP-DOWN uMODULE REGULATOR
HZ
YINGYI Y.
N/A
LTM4675EY
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
Monday, March 23, 2015
23
DUAL STEP-DOWN uMODULE REGULATOR
HZ
YINGYI Y.
N/A
LTM4675EY
R53
0.01
C22 1uF
J4
IOSTEP
1
2
3
4
5
C24 1uF
E24
SGND
J12 1
2
3
4
5
E21
IOSTEP_CLK
C21 1uF
E23
SGND
E22
GND
C23 1uF
R49 2010 OPT
Q1
SUD50N03-09P
2
1
3
4
R38 OPT
R52 10K
R42 OPT.
R35 OPT
R50
R48 2010 0.5W
0
R51
R41 OPT.
J3
1
2
3
4
5

13
dc2053afa
DEMO MANUAL DC2053A
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 DIAGRAM
5
5
4
4
3
3
2
2
1
1
D D C C B B A A
TO DC1613A
ALL PARTS ON THIS PAGE ARE FOR DEMO BOARD ONLY, NOT NEEDED IN CUSTOMER DESIGN
PSM STACKING CONNECTORS:
1206
OPTIONAL CIRCUIT FOR PROGRAMMING WITHOUT VIN
WITH POWER SYSTEM MANAGEMENT
DEMO CIRCUIT 2053A
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
AUXVCC
EEWP
EESDA EESCL
3V3
VIN
3V3 VDD33
VIN
3V3
ALERTB SDA SCL
RUN0 RUN1
GPIO1B GPIO0B
SYNC
SHARE_CLK
VDD33
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
Monday, March 23, 2015
33
DUAL STEP-DOWN uMODULE REGULATOR
HZ
YINGYI Y.
N/A
LTM4675EY
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
Monday, March 23, 2015
33
DUAL STEP-DOWN uMODULE REGULATOR
HZ
YINGYI Y.
N/A
LTM4675EY
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
Monday, March 23, 2015
33
DUAL STEP-DOWN uMODULE REGULATOR
HZ
YINGYI Y.
N/A
LTM4675EY
R63 0
E20
AUXP
J1 DEMO HEADER (M)
FAULTB
1
CTRL
2
ALERTB
3
SDA
4
SHARE_CLK
5
SCL
6
RESETB
7
AUXP
8
UNUSED
9
UNUSED
10
GND
11
GND
12
12V
13
12V
14
R73 4.99K
D1 OPT
R89 OPT
R78 15.8k
U3
24LC025-I/ST
A0
1
A1
2
A2
3
VSS
4SDA 5
SCL 6
WP 7
VCC 8
E29
RUN0
R77 10K
R64 OPT
R88 OPT
R61 OPT
C27 10nF
R66
0
C26
100nF
R69 10
R82 OPT
R72 4.99K
Q19
DMP3130L-7
23
1
J11
AUXP 1
SDA 2
GND 3
SCL 4
LGKPWR 5
ALERTB 6
GPIO_1 7
OUTEN_0 8 OUTEN_1 9
GND 10
AUXSCL 11
AUXSDA 12
R67 OPT
C28 10nF
R62 OPT
R74 OPT
E30
RUN1
J2 DEMO HEADER (F)
FAULTB 1
CTRL 2
ALERTB 3
SDA 4
SHARE_CLK 5
SCL 6
RESETB 7
AUXP 8
UNUSED 9 UNUSED 10
GND 11 GND 12
12V 13 12V 14
R75 OPT
R83 OPT
R70 10
R65 0
D2 OPT
R68 OPT

14
dc2053afa
DEMO MANUAL DC2053A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2015
LT 0515 REV A • PRINTED IN USA
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LT C ) 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 LT C 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 LT C 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. LT C assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LT C 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 LT C applica-
tion engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation