DC2113A - Demo Manual

DEMO MANUAL DC2113A
LTC3649, 60V, Low IQ
Monolithic High Efficiency
Step-Down Regulator
DESCRIPTION
Demonstration circuit 2113A is a high input voltage, high
efficiency synchronous monolithic buck converter featuring the LTC®3649. The DC2113A has wide input voltage
range from 3.1V up to 60V. The output voltage of the
DC2113A can be set as to 3.3V or 5V. However, “USER
SELECT” option of DC2113A allows output voltage to be
as high as input voltage minus 0.5V, with certain modifications. DC2113A is capable of delivering up to 4A of
output current. DC2113A supports three operation modes:
Fixed-Frequency modulation, Burst Mode® operation
and the user can synchronize it with external clock also.
Fixed-Frequency mode of operation maximizes the output
current, reduces output voltage ripple, and yields a low
noise switching spectrum. Burst Mode operation employs
a variable frequency switching algorithm that minimizes the
no-load input quiescent current and improves efficiency
at light loads.
PERFORMANCE SUMMARY
PARAMETER
The DC2113A consumes less than 15µA of quiescent current during shutdown and it consumes less than 440µA at
no load conditions in Burst Mode operation. The DC2113A
has a standard operating frequency of 500kHz, but can be
adjusted in a range between 300kHz and as high as 3MHz.
DC2113A is a monolithic step-down converter, LTC3649
integrates top and bottom N-channel MOSFETs, significantly reducing circuit footprint. DC2113A was designed
to support multiple footprints of input/output capacitors
and inductor to accommodate variety of applications.
The data sheet of LTC3649 gives a complete description
functionality of this regulator; also contains operation and
application information and must be read in conjunction
with this demo board manual for DC2113A.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2113A
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
Specifications are at TA = 25°C
CONDITIONS
VALUE
Minimum Input Voltage
4V
Maximum Input Voltage
60V
Output Voltage VOUT Regulation
VIN = 4V – 60V
5V ± 2% or 3.3V ± 2%
Maximum Continuous Output Current
VOUT
4A
Preset Operating Frequency
R10 = 200kΩ
500kHz
External Clock Sync. Frequency Range
300kHz – 3MHz
Efficiency
VIN = 12V, VOUT = 5V, IOUT = 4A
VIN = 12V, VOUT = 3.3V, IOUT = 4A
97%
97%
Typical Output Ripple VOUT
VIN = 12V, VOUT = 5V, IOUT = 4A (20MHz BW)
<15mVP-P
Quiescent Current at Shutdown
VIN = 4V – 60V
<14µA
Input Current at No Load
VIN = 4V – 60V, Burst Mode Operation
<430µA
dc2113afb
1
DEMO MANUAL DC2113A
QUICK START PROCEDURE
Demonstration circuit 2113A is easy to set up to evaluate
the performance of the LTC3649. For proper measurement
equipment configuration, set up the circuit according to
the diagram in Figure 1. Before proceeding to test, insert
shunt into JP2 (RUN) into OFF position, which connects
the RUN pin to ground (GND), and thus, shut down the
output. Set jumper JP1 (MODE) into FCC (forced counties
conduction mode) position. Set jumper JP3 (VOUT) into
5.0V position.
2.Turn on VOUT of the circuit by inserting the shunt in
header JP2 (RUN) into the ON position. The output
voltage should be regulating. Measure VOUT – it should
measure 5.0V ± 2% (Do not apply more than the rated
maximum voltage of 60V to the board or the part may
be damaged). Vary the VOUT load, which should not
exceed 4A. Vary the input voltage from 6V – 55V, the
VOUT – it should measure 5.0V ± 2%.
3.Set JP2 (RUN) into OFF and then jumper JP3 (VOUT)
into 3.3V position.
NOTE: When measuring the input or output voltage ripple,
care must be taken to avoid a long ground lead on the
oscilloscope probe. Measure the input or output voltage
ripple by touching the probe tip directly across the VIN or
VOUT and GND terminals. See Figure 2 for proper scope
probe technique.
4.Turn on VOUT2 of the circuit by inserting the shunt in
header JP2 (RUN) into the ON position. The output
voltage should be regulating. Measure VOUT – it should
measure 3.3V ± 2% (Do not apply more than the rated
maximum voltage of 60V to the board or the part may
be damaged). Vary the VOUT load, which should not
exceed 4A. Vary the input voltage from 16V – 55V, the
VOUT – it should measure 3.3V ± 2%
1.With the DC2113A set up according to the proper
measurement and equipment in Figure 1, apply 12V at
VIN. Measure VOUT; it should read 0V. If desired, one
can measure the shutdown supply current at this point.
The supply current will be approximately 14µA, or less,
in shutdown.
+
–
5. Set output current to zero and move jumper JP1 (MODE)
into BURST position and measure VOUT for 3.3V.
6. Set output current to zero and move jumper JP1 (MODE)
into BURST position and measure VOUT for 5.0V.
+
SUPPLY
+
–
–
–
–
+
+
Figure 1. Proper Measurement Equipment Setup
2
LOAD
+
–
dc2113afb
DEMO MANUAL DC2113A
QUICK START PROCEDURE
GND
VIN
Figure 2. Measuring Input or Output Ripple
100
95
90
%
85
80
75
70
65
60
0
1
2
3
LOAD CURRENT (A)
4
dc2113 F02
Figure 3. Efficiency vs Input Voltage and Load Current, VOUT 5V, Burst Mode Operation
Figure 4. Thermal Map, VIN 60V, IOUT1 5V at 4.0A. No Air Flow
dc2113afb
3
DEMO MANUAL DC2113A
PARTS LIST
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
Required Circuit Components
1
2
CIN1, CIN2
CAP, 1210 10μF 10% 63V X7R
MURATA GRM32ER71J106KA12L
2
1
CIN3
CAP, 10μF 20% 63V ELEC
SUN ELECT. 63CE10KX
3
2
CIN4, C7
CAP, 0805 1μF 10% 100V X7S
TDK C2012X7S2A105K
4
2
COUT1, COUT2
CAP, 1210 22μF 10% 25V X7R
MURATA GRM32ER71E226KE15L
5
1
COUT3
CAP, 3528 150μF 20% 6.3V POSCAP
PANASONIC 6TPE150MAZB
6
1
CTH
CAP, 0603 4700pF 10% 25V X7R
AVX 06033C472KAT2A
7
1
CTHP
CAP, 0603 10pF 5% 25V C0G
AVX 06033A100JAT2A
8
1
CVCC
CAP, 0805 2.2μF 10% 16V X7R
AVX 0805YC225KAT2A
9
1
C1
CAP, 0603 0.01μF 10% 50V X7R
AVX 06035C103KAT4A
10
1
C5
CAP, 0603 1μF 10% 16V X5R
AVX 0603YD105KAT2A
11
1
C6
CAP, 0603 0.1μF 10% 50V X7R
AVX 06035C104KAT2A
12
1
L1
IND, 5.6μH
COILCRAFT XAL5050-562MEB
13
1
RIMON
RES, 0603 10.0kΩ 1% 1/10W
VISHAY CRCW060310K0FKEA
14
1
RTH
RES, 0603 1.0kΩ 1% 1/10W
VISHAY CRCW06031K00FKEA
15
1
R2
RES, 0603 10MΩ 1% 1/10W
VISHAY CRCW060310M0FKEA
16
1
R3
RES, 0603 100kΩ 1% 1/10W
VISHAY CRCW0603100KFKEA
17
1
R5
RES, 0603 10kΩ 5% 1/10W
VISHAY CRCW060310K0JNEA
18
1
R10
RES, 0603 340kΩ 1% 1/10W
VISHAY CRCW0603340KFKEA
19
1
R13
RES, 0603 100kΩ 5% 1/10W
VISHAY CRCW0603100KJNEA
20
1
R14
RES, 0603 0Ω JUMPER
VISHAY CRCW06030000Z0EA
1
R17
RES, 0603 100Ω 1% 1/10W
VISHAY CRCW0603100RFKEA
21
1
R18
RES, 0805 1MΩ 1% 1/8W
VISHAY CRCW08051M00FKEA
22
1
R25
RES, 0603 1MΩ 1% 1/10W
VISHAY CRCW06031M00FKEA
1
R27
RES, 0603 10Ω 1% 0.1W
VISHAY CRCW060310R0FKEA
1
R26
RES, 0603 137kΩ 1% 0.063W
VISHAY CRCW0603137KFKEA
23
24
1
R28
RES, 0603 196kΩ 1% 1/10W
VISHAY CRCW0603196KFKEA
25
1
U1
IC, SYNCHRONOUS BUCK REGULATOR
LINEAR TECH. LTC3649EFE28#PBF-ES
R1, R19, R21, R29, R30, R31
RES, 0603 OPTION
OPTION
R22
RES, 0805 OPTION
VISHAY CRCW08051M00FKEA
C3,C4
CAP, 0603 OPTION
OPTION
CIN5
CAP, OPTION
OPTION
E1, E2, E3, E4, E5, E6, E7, E8
TURRET
MILL MAX 2501-2-00-80-00-00-07-0
Additional Demo Board Circuit Components
Hardware
11
E9, E10, E12
4
3
JP1, JP2, JP3
HEADER, 3-PIN, DBL ROW 2mm
SULLINS, NRPN032PAEN
4
MH1, MH2, MH3, MH4
STANDOFF, SNAP ON
KEYSTONE 8833
3
XJP1, XJP2, XJP3
SHUNT
SAMTEC 2SN-BK-G
dc2113afb
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.
1
2
3
E9
E12
E1
E2
E7
5
3
1
R13
100k
6
2
6
4
4
1. ALL CAPACITORS AND RESISTORS ARE 0603.
2. ALL RESISTORS ARE 5%.
A
2
OFF 5
JP2
RUN
JP1
MODE
B
C4
OPT
OPT
C3
CTH
4.7nF
NPO
RTH
1k
1%
CIMON
470pF
R2
10M
1%
BURST
EXT
FCC
R30
OPT
OPT
1%
R17 100
VOUT
4
3
2
1
12
11
8
10
9
16
GND
GND
GND
GND
PGDFB
PGOOD
RUN
MODE/SYNC
SGND
VOUT
IMON
RT
ITH
ISET
INTVCC
GND
EXTVCC
BOOST
SW
SW
SW
SW
SW
SW
SW
VIN
VIN
VINREG
C
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
CUSTOMER NOTICE
R26
137k
1%
R25
1M
1%
15
18
17
200k 1% 13
R10
1uF
C5
C6 0.1uF
i ^
SCALE = NONE
`\
PCB DES.
L1
5.6uH
CIN1
10uF
63V
1210
R22
OPT
0805
CIN2
10uF
63V
1210
R21 OPT
DATE
E5
E4
E3
GND
GND
D
DATE:
Tuesday, February 09, 2016
E
SHEET 1
HIGH VOLTAGE, MONOLITHIC
SYNCHRONOUS BUCK REGULATOR
SIZE
IC NO.
LTC3649EFE#PBF-ES
N/A
DEMO CIRCUIT 2113A
3
REV.
OF 1
LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
www.linear.com
Fax: (408)434-0507
EXTVCC
E10
E6
i ^
APPROVED
VIN
60V MAX
11/13/15
E
VOUT
COUT3 5V AT 4.0A
+ 150uF
10uF
63V
+ CIN3
COUT2
22uF
10V
1206
VOUT
OPT
+ CIN5
TECHNOLOGY
TITLE: SCHEMATIC
R27
10
VOUT
COUT1
22uF
10V
1206
CIN4
1uF
0805
100V
VIN
PROD
R5
10k
DESCRIPTION
3
REVISION HISTORY
REV
D
COILCRAFT
XAL5050-562MEB
C7
1uF
0603\0805
100V
APP ENG.
5
19
21
22
23
24
25
26
27
28
6
7
14
20
CVCC
2.2uF
0805
ECO
APPROVALS
INTVCC
U1
LTC3649EFE#PBF-ES
C
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.
VOUT
CTHP
10pF
NPO
C1
0.01uF
6 USER SELECT
4 3.3V
2 5.0V
OPT
INTVCC
JP3
VOUT
R1
R31
OPT
EXT I/O 3
R18
1M
1%
0805 ON 1
VIN
INTVCC
OPT
R19
R14 0
RIMON
10.0k
1%
NOTES: UNLESS OTHERWISE SPECIFIED,
PGOOD
GND
EXT I/O
GND
EXT_SYNC
IMON
E8
3
1
1% 5
1%
R29
196k
R28
100k
R3
B
SGND
29
4
A
1
2
3
4
DEMO MANUAL DC2113A
SCHEMATIC DIAGRAM
dc2113afb
5
DEMO MANUAL DC2113A
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
6
dc2113afb
Linear Technology Corporation
LT 0216 REV B • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2015
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