DEMO MANUAL DC1385A LTM4614EV: Dual 4A Step-Down µModule Regulator

DEMO MANUAL DC1385A LTM4614EV: Dual 4A Step-Down µModule Regulator
DEMO MANUAL DC1385A
LTM4614EV: Dual 4A
Step-Down µModule® Regulator
DESCRIPTION
Demonstration circuit DC1385A features the LTM®4614EV,
the high efficiency, high density power module with dual 4A
switch mode outputs. Derating is necessary for certain VIN,
VOUT, and thermal conditions. In the default configuration,
the two outputs share the same input supply, however each
regulator may have its own input supply simply by removing a resistor. By enabling the tracking feature, the outputs
PERFORMANCE SUMMARY
coincidentally follow another supply rail. The LTM4614 data
sheet must be read in conjunction with this demo board
prior to working on or modifying demo circuit DC1477A.
Design files for this circuit board are available at
http://www.linear.com/demo
L, LT, LTC, LTM, μModule, Linear Technology and the Linear logo are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
(TA = 25°C)
PARAMETER
CONDITIONS
VALUE
Input Voltage Range
VIN1 and VIN2
2.375V to 5.5V
Output Voltage VOUT1, VOUT2
VIN = 5VDC,
IOUT1, IOUT2 = 4A.
VOUT1 = 1.8V ±2%,
VOUT2 = 1.2V ±2%
Maximum Continuous Output Current
Derating is Necessary for Certain VIN, VOUT, and Thermal
Conditions, See Data Sheet for Details
4ADC for VOUT1, VOUT2
Default Operating Frequency
1.25MHz
Efficiency of Channel 1
VIN1 = 5V, VOUT1 = 1.8V, IOUT1 = 4A
81.5%, See Figure 3
Efficiency of Channel 2
VIN2 = 5V, VOUT2 = 1.2V, IOUT2 = 4A
75.4%, See Figure 3
BOARD PHOTO
dc1385af
1
DEMO MANUAL DC1385A
QUICK START PROCEDURE
Demonstration circuit DC1385A is an easy way to evaluate the performance of the LTM4614EV. Please refer to
Figure 1 for proper measurement equipment setup and
follow the procedure below:
1. Place jumpers in the following positions for a typical
1.8V and 1.2V application:
TRACK1
RUN1
RUN2
DISABLED
ON
ON
2. With the power off, connect the input power supply,
load and meters as shown in Figure 1. Preset the loads
to 0A and VIN supply to be less than 5.5V.
3. Turn on the power at the input. The output voltage
between VO1+ and VO1– should be 1.8V ± 2%, and the
voltage between VO2+ and VO2– should be 1.2V ±2%.
5. Channel 1 can track another supply by connecting TP17,
TRACK to another supply and setting JP1 to ENABLED.
Resistors R8 and R9 are set up for coincidental tracking.
Channel 2 is set up to coincidentally track the output
of channel 1 by resistor R6 and R7. Please refer to the
circuit schematic and data sheet.
6. Because DC1385A is assembled in a way that VOUT2
tracks VOUT1 automatically, placing the JP2 (RUN1) to
OFF position turns off both outputs. To disable tracking function of VOUT2, please remove R6 and R7 and
connect TRACK2 to VIN2.
7. VIN1 and VIN2 are shorted on DC1385A through a
1mohm resistor, R10. If desired, remove R10 and different supplies can be applied to VIN1 and VIN2 of this
demo circuit.
4. Once the proper output voltage is established, adjust
the load within the operating range and observe the
output voltage regulation, ripple voltage, efficiency and
other parameters. To measure input and output ripple,
please refer to Figure 2 for proper setup.
dc1385af
2
DEMO MANUAL DC1385A
QUICK START PROCEDURE
+
–
V
+
–
–
LOAD
–
LOAD
V
A
0 ~ 4A
+
+
A
0 ~ 4A
–
+
–
+
VIN
A
–
V
+
Figure 1. Test Setup of DC1385A
+
–
INPUT OR OUTPUT CAPACITOR
Figure 2. Proper Scope Probe Placement for Measuring Input or Output Ripple
dc1385af
3
DEMO MANUAL DC1385A
QUICK START PROCEDURE
Figure 3. Measured Efficiency for Different Channels
dc1385af
4
DEMO MANUAL DC1385A
QUICK START PROCEDURE
VOUT1 (20mV/DIV)
IOUT1 STEP (2A/DIV)
VIN1 = 5V
VOUT1 =1.8V
CONTINUOUS CURRENT MODE (CCM)
1A TO 4A LOAD STEP ON VOUT1
COUT1 = 100μF CERAMIC (1210, X5R, 6.3V) + 22μF CERAMIC (1206, X5R, 6.3V)
Figure 4. Measured Load Transient Response for VOUT1
VOUT2 (20mV/DIV)
IOUT2 STEP (2A/DIV)
VIN2 = 5V
VOUT2 =1.2V
CONTINUOUS CURRENT MODE (CCM)
1A TO 4A LOAD STEP ON VOUT2
COUT2 = 100μF CERAMIC (1210, X5R, 6.3V) + 22μF CERAMIC (1206, X5R, 6.3V)
Figure 5. Measured Load Transient Response for VOUT2
dc1385af
5
DEMO MANUAL DC1385A
PARTS LIST
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
Required Circuit Components
1
2
CIN1, CIN7
CAP., OSCON 120uF, 10V, E7
SANYO, 10SVP120M
2
4
CIN3, CIN4, CIN5, CIN6
CAP., X5R, 10μF, 6.3V, 20%, 1206
AVX, 12066D106MAT2A
3
2
CO3, CO8
CAP., X5R, 22μF, 6.3V, 20%, 1206
AVX, 12066D226MAT2A
4
2
CO1, CO9
CAP., X5R, 100μF, 6.3V, 20%, 1210
AVX, 12106D107MAT2A
5
1
RSET1
RES., CHIP, 4.02k, 1/16W, 1%, 0402
VISHAY, CRCW04024K02FKED
6
1
RSET2
RES., CHIP, 10.0k, 1/16W, 1%, 0402
VISHAY, CRCW040210K0FKED
7
2
R2, R1
RES., CHIP, 100k, 1/16W, 1%, 0402
VISHAY, CRCW0402100KFKED
8
1
U1
I.C. LTM4614EV 144 PIN LGA
LINEAR TECH., LTM4614EV
Additional Demo Board Circuit Components
1
0
CPP1, CFF1, CPP2, CFF2
CAP., 0402, OPT
2
0
CIN2, CIN8, CO11, CO12
CAP., 1206, OPT
3
0
CO2, CO4, CO5, CO6, CO7, CO10
CAP., 7343, OPT
4
0
C1, C2, C3, C4
CAP., 0402, OPT
5
1
R9
RES., CHIP, 4.02k, 1/16W, 1%, 0402
VISHAY, CRCW04024K02FKED
6
1
R7
RES., CHIP, 10.0k, 1/16W, 1%, 0402
VISHAY, CRCW040210K0FKED
7
2
R8, R6
RES., CHIP, 4.99k, 1/16W, 1%, 0402
VISHAY, CRCW04024K99FKED
8
1
R10
RES., CHIP, 1mΩ, 1W, 5%, 2512
PANASONIC, ERJM1WTJ1M0V
CAP7343
Hardware-For Demo Board Only
1
3
JP1, JP2, JP3
HEADER 3 PIN 0.079 SINGLE ROW
SAMTEC, TMM103-02-L-S
2
3
JPX1, JPX2, JPX3
SHUNT, 0.079" CENTER
SAMTEC, 2SN-BK-G
3
13
TP1, TP3, TP7-9, TP12,
TESTPOINT, TURRET, 0.094" PBF
MILL-MAX, 2501-2-00-80-00-00-07-0
JACK BANANA
KEYSTONE, 575-4
STAND-OFF, NYLON 0.50"
KEYSTONE, 8833(SNAP ON)
TP14, TP16-20, TP23
4
8
TP2, TP6, TP10, TP11, TP13,
5
4
(STAND-OFF)
TP15, TP21, TP22
dc1385af
6
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
A
B
C
D
TP2
TP13
TP12
TP7
TP6
TRACK
VO1-
GND1
TP17
TP16
TP15
1.8V @ 4A MAX
VOUT1
VO1+
VIN1-
GND
2.375V - 5.5V
VIN1
OPT
OPT
5
GND1
GND2
4.99K
R8
ENABLED
DISABLED
JP1
TRACK1
TP19
TP18
R9
4.02K
OPT
2
VIN1
4.02K
PGOOD1
CIN2
OPT
OPT
CPP1
CIN4
10uF
6.3V
JP2
ON
OFF
2
RUN1
CO10
OPT
TP9
CIN3
10uF
6.3V
CO9
100uF
6.3V
VOUT1
CO8
22uF
6.3V
RSET1
OPT
VOUT1 CFF1
CO7
120uF
10V
+ CIN1
CO6
VIN1
1
3
TP1
1
3
OPT
C1
CO11
OPT
L4
L2
L3
L6
L5
J9
J10
J11
J12
K9
K10
K11
K12
L9
L10
L11
L12
M9
M10
M11
M12
OPT
C3
R2
100K
VOUT1
4
RUN/SS1
TRACK1
FB1
COMP1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
PGOOD1
VIN1
J1
J2
J3
J4
J5
J6
K1
K2
K3
K4
K5
K6
VIN1
VIN1
VIN1
VIN1
VIN1
VIN1
VIN1
VIN1
VIN1
VIN1
VIN1
VIN1
SW1
3
3
LTM4614EV
U1
TP4
1mOhm
R10
H2
H3
H4
H5
H6
SW1
SW1
SW1
SW1
SW1
SW2
TP5
VIN2
RUN/SS2
TRACK2
FB2
COMP2
VOUT2
VOUT2
VOUT2
VOUT2
VOUT2
VOUT2
VOUT2
VOUT2
VOUT2
VOUT2
VOUT2
VOUT2
VOUT2
VOUT2
VOUT2
VOUT2
PGOOD2
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
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.
CUSTOMER NOTICE
2
E2
E3
E6
E5
C9
C10
C11
C12
D9
D10
D11
D12
E9
E10
E11
E12
F9
F10
F11
F12
E4
2
APPROVED
CHECKED
DATE
3/7/07
3/7/07
Thursday, June 05, 2008
J. Sun
Antonina
APPROVALS
ENGINEER
DRAWN
OPT
C4
OPT
C2
CO1
100uF
6.3V
R1
100K
VOUT2
CONTRACT NO.
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
B2
B3
B4
B5
B6
SW2
SW2
SW2
SW2
SW2
G1
G2
G3
G4
G5
G6
G7
G8
G9
G10
G11
G12
H1
H7
H8
H9
H10
H11
H12
J7
J8
K7
K8
L1
L7
L8
M1
M2
M3
M4
M5
M6
M7
M8
C1
C2
C3
C4
C5
C6
D1
D2
D3
D4
D5
D6
VIN2
VIN2
VIN2
VIN2
VIN2
VIN2
VIN2
VIN2
VIN2
VIN2
VIN2
VIN2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
B1
B7
B8
B9
B10
B11
B12
C7
C8
D7
D8
E1
E7
E8
F1
F2
F3
F4
F5
F6
F7
F8
VIN1+
4
TECHNOLOGY
R7
10.0K
1%
R6
4.99K
1%
TP20
VIN2
VIN2+
CO12
OPT
TP23
TP22
VO2+
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
TP14
TP11
FILENAME:
CAGE CODE
SCALE:
SIZE
DWG NO
1
SHEET
DC1385A
1
OF
VO2-
1
3
REV
GND2
VOUT2
TP10
1.2V @ 4A MAX
TP8
VIN2-
GND
2.375V - 5.5V
TP21
VOUT2
CO5
OPT
VOUT1
OPT
CPP2
LTM4614EV
JP3
OFF
ON
RUN2
10K
OPT
CFF2
CO4
OPT
CIN8
OPT
1
High Density Dual Step-Down Power TModule
TITLE
2
VIN2
CO3
22uF
6.3V
VOUT2
120uF
10V
+ CIN7
PGOOD2
CIN6
10uF
6.3V
RSET2
CO2
OPT
TP3
CIN5
10uF
6.3V
1
3
5
A
B
C
D
DEMO MANUAL DC1385A
SCHEMATIC DIAGRAM
dc1385af
7
DEMO MANUAL DC1385A
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
dc1385af
8
Linear Technology Corporation
LT 0211 • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2011
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement