1
dc1743af
DEMO MANUAL DC1743A
Description
LTM4613
8A, High Voltage Power
µModule Regulator
Demonstration circuit DC1743A features the LTM
®
4613EV,
an EN55022 class B certified, high input and output voltage,
high efficiency, switch mode step-down power µModule
®
regulator. The input voltage range is from 5V to 36V. The
output voltage is jumper programmable from 3.3V to 12V
with a rated load current of 8A. Derating is necessary
for certain VIN, VOUT, frequency and thermal conditions:
please refer to LTM4613 data sheet for derating curves.
Only input and output capacitors are needed externally.
The DC1743A offers the TRACK/SS pin allowing the user
to program output tracking or soft-start period. Output
perForMAnce sUMMArY
BoArD photo
voltage margining can also be realized through jumper
position selections.
Higher efficiency at low load currents is achieved by setting
the MODE pin jumper to DCM. The PLL pin is available
to synchronize the LTM4613EV to an external clock. The
LTM4613 data sheet must be read in conjunction with
this demo manual prior to working on or modifying demo
circuit DC1743A.
Design files for this circuit board are available at
http://www.linear.com/demo
(TA = 25°C)
PARAMETER CONDITIONS VALUE
Input Voltage Range 5V to 36V
Output Voltage VOUT Jumper Selectable 3.3V, 5V, 12V; ± 2%
Maximum Continuous Output Current Derating Is Necessary for Certain Operating Conditions. See Data Sheet
for Details.
8ADC
Default Operating Frequency VOUT = 12V
VOUT = 5V
VOUT = 3.3V
600kHz
250kHz
165kHz
Efficiency VIN = 12V, VOUT = 5V, IOUT = 8A 93.0% See Figure 3
Load Transient VIN = 12V, VOUT = 5V See Figure 4
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.
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dc1743af
DEMO MANUAL DC1743A
qUick stArt proceDUre
Demonstration circuit DC1743A is an easy way to evalu-
ate the performance of the LTM4613EV. 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
3.3VOUT application:
MODE MARG1 MARG0 VOUT SELECT RUN
CCM LO LO 3.3V ON
2. With power off, connect the input power supply, load
and meters as shown in Figure 1. Preset the load to 0A
and VIN supply to be 0V.
3. Turn on the power at the input. Increase VIN to 12V
(do not hot-plug the input supply or apply more than
the rated maximum voltage of 36V to the board or the
part may be damaged). The output voltage should be
regulated and deliver the selected output voltage ± 2%.
4. Vary the input voltage from 5V to 36V and adjust the
load current from 0A to 8A. Observe the output voltage
regulation, ripple voltage, efficiency, and other param-
eters.
5. To measure input or output ripple, insert the scope
probe to J7 or J4.
6. For optional load transient test, apply an adjustable pulse
signal between IOSTEP_CLK and GND test points. The
pulse amplitude sets the load step current amplitude.
The pulse duty cycle should be low (< 5%) to limit the
thermal stress on the load transient circuit. The load
step current can be monitored with a BNC connected
to J3 (20mV/A). The output voltage can be monitored
at the probe jack J4.
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dc1743af
DEMO MANUAL DC1743A
Figure 1. Proper Measurement Equipment Setup
qUick stArt proceDUre
VIN
A
LOAD
+ –
V
A
+
–
V
+
+
–
–
DC1743A F01
+
–
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dc1743af
DEMO MANUAL DC1743A
Efficiency vs Load Current
(VIN = 12V)
Efficiency vs Load Current
(VIN = 24V)
Efficiency vs Load Current
(VIN = 36V)
Figure 3. Measured DC1743A Efficiency at Different VIN and VOUT (DCM Mode Enabled)
Figure 2. Measuring VIN or VOUT Ripple
LOAD CURRENT (A)
0
EFFICIENCY (%)
80
85
95
90
100
4 6
DC1743A F03a
75
70
60
65
28
55
50
VOUT = 3.3V
VOUT = 5V
DC1743A F02
SCOPE PROBE
LOAD CURRENT (A)
0
EFFICIENCY (%)
80
85
95
90
100
4 6
DC1743A F03b
75
70
60
65
28
55
50
VOUT = 3.3V
VOUT = 5V
VOUT = 12V
qUick stArt proceDUre
LOAD CURRENT (A)
0
EFFICIENCY (%)
80
85
100
90
95
4 6
DC1743A F03c
75
70
60
65
28
55
50
VOUT = 3.3V
VOUT = 5V
VOUT = 12V
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dc1743af
DEMO MANUAL DC1743A
Figure 5. Thermal Image of LTM4613
Figure 4. Measured Load Transient Responses
VIN = 24V
VOUT = 12V
ILOAD = 8A
AMBIENT TEMPERATURE = 23.3°C
NO FORCED AIR FLOW
DC1743A F05
qUick stArt proceDUre
VIN = 12V, VOUT = 5V
0A TO 4A LOAD STEP
COUT = 1x47µF/16V/POSCAP+3x47µF/16V/X5R+1x10µF/16V/X5R
100µs/DIV
IOUT_STEP
5A/DIV
VOUT
100mV/DIV
DC1743A F04a
VIN = 24V, VOUT = 12V
0A TO 4A LOAD STEP
COUT = 1x47µF/16V/POSCAP+3x47µF/16V/X5R+1x10µF/16V/X5R
IOUT_STEP
5A/DIV
VOUT
200mV/DIV
DC1743A F04b
100µs/DIV
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dc1743af
DEMO MANUAL DC1743A
pArts list
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 1 CFF CAP, NPO 47pF 50V 10% 0603 AVX 06035A470KAT1A
2 1 CIN1 CAP, ALUM 100µF 50V 10% SUNCON 50CE100FS
3 5 CIN2, CIN3, C8, C9, C10 CAP, X5R 10µF 50V 20% 1210 TAIYO YUDEN UMK325BJ106MM-T
4 3 COUT1, COUT2, COUT6 CAP, X5R 47µF 16V 20% 1210 TAIYO YUDEN EMK325BJ476MM
5 1 COUT4 CAP, X5R 10µF 16V 20% 1210 TDK C3225X5R1C106M
6 1 COUT5 CAP, X7R 1µF 16V 10% 0603 TDK C1608X7R1C105K
7 1 COUT7 CAP, POSCAP 47µF 16V 20% 7343 SANYO 16TQC47M
8 1 CSS CAP, X7R 0.1µF 16V 20% 0603 AVX 0603YC104MAT2A
9 1 R14 RES, CHIP 22.1k 0.06W 1% 0603 VISHAY CRCW060322K1FKEA
10 1R16 RES, CHIP 13.7k 0.06W 1% 0603 VISHAY CRCW060313K7FKEA
11 1R17 RES, CHIP 5.23k 0.06W 1% 0603 YAYEO, RC0603FR-075K23L
12 2R2, R12 RES, CHIP 51k 0.06W 5% 0603 VISHAY CRCW060351K0JNEA
13 1R15 RES, CHIP 10k 0.06W 5% 0603 VISHAY CRCW060310K0JNEA
14 1R4 RES, CHIP 392k 0.06W 1% 0603 VISHAY CRCW0603392KFKEA
15 1D1 ZENER DIODE, 5.1V SOT23 ON SEMICONDUCTOR MMBZ5231B
16 1U1 I.C., VOLTAGE REG LINEAR TECHNOLOGY CORPORATION LTM4613EV
Additional Demo Board Circuit Components
1 1 Q1 MOSFET, N-CHANNEL 30V VISHAY SILICONIX SUD50N03-09
2 1 C1 CAP, X7R 1µF 16V 10% 0603 TDK C1608X7R1C105K
3 0 COUT3, CIN4, CIN5 (OPT) CA P, 1210
4 0 CIN6 (OPT) CAP, 0805
5 0 C2, C3, C6, C7, CP (OPT) CA P, 0 6 0 3
6 1 R1 RES, CHIP 10k 0.06W 5% 0603 VISHAY CRCW060310K0JNEA
7 1 R3 RES, LRC 0.020 1W 5% 2512 IRC LRF2512-01-R020-J
8 2 R5, R9 RES, CHIP 0Ω 1/16W 1A 0603 VISHAY CRCW0603000Z
9 0 R6, R7, R8, R10, R11, R13
(OPT)
RES, 0603
Hardware
1 4 JP1, JP2, JP3, JP4 HEADERS, 3 PINS 2mm CTRS SAMTEC TMM-103-02-L-S
2 3 JP5, JP6, JP7 JUMPER, 2 PINS 2mm CTRS SAMTEC TMM-102-02-L-S
3 4 J1, J2, J5, J6 CONNECTOR, BANANA JACK KEYSTONE 575-4
4 1 J3 BNC CONNECTOR CONNEX 112404
5 2 J4, J7 TEST PROBE, CONNECTOR TEKTRONIC 131-4353-00
611 E1 TO E4, E6 TO E12 TURRET, TESTPOINT MILL MAX 2501-2-00-80-00-00-07-0
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dc1743af
DEMO MANUAL DC1743A
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.
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
FSET
5V
VOUT
VOUT
5V
5V
5V
5V
VIN
VIN
VIN
5V
REVISION HISTORY
DESCRIPTION DATE
APPROVED
ECO REV
REVISION HISTORY
DESCRIPTION DATE
APPROVED
ECO REV
REVISION HISTORY
DESCRIPTION DATE
APPROVED
ECO REV
APPROVALS
TECHNOLOGY
www.linear.com
APPROVALS
TECHNOLOGY
www.linear.com
APPROVALS
TECHNOLOGY
www.linear.com
NOTE: UNLESS OTHERWISE SPECIFIED.
1. ALL RESISTORS
ALL CAPACITORS
2. INSTALL SHUNTS AS SHOWN.
NOTE: UNLESS OTHERWISE SPECIFIED.
1. ALL RESISTORS
ALL CAPACITORS
2. INSTALL SHUNTS AS SHOWN.
NOTE: UNLESS OTHERWISE SPECIFIED.
1. ALL RESISTORS
ALL CAPACITORS
2. INSTALL SHUNTS AS SHOWN.
E4
PGOOD
E4
PGOOD
J1
VIN
5V - 36V
J1
VIN
5V - 36V
J5
VOUT
3.3V / 5V / 12V
@ 8A
J5
VOUT
3.3V / 5V / 12V
@ 8A
R4
392K
1%
R4
392K
1%
CIN5
(OPT)
1210
CIN5
(OPT)
1210
C10
10uF
C10
10uF
CIN3
10uF
50V
1210
CIN3
10uF
50V
1210
R1
10K
R1
10K
COUT6
47uF
16V
1210
COUT6
47uF
16V
1210
COUT2
47uF
16V
COUT2
47uF
16V
C2
(OPT)
C2
(OPT)
JP7
12V
JP7
12V
J3
IOSTEP
J3
IOSTEP
+
CIN1
100uF
50V
+
CIN1
100uF
50V
E11
COMP
E11
COMP
CIN2
10uF
50V
1210
CIN2
10uF
50V
1210
CSS
0.1uF
CSS
0.1uF
R11
(OPT)
R11
(OPT)
E12
SGND
E12
SGND
JP3
DCM
CCM
MODE
JP3
DCM
CCM
MODE
1
3
2
R17
5.23K
1%
R17
5.23K
1%
R10
(OPT)
R10
(OPT)
C7
(OPT)
C7
(OPT)
R16
13.7K
1%
R16
13.7K
1%
R14
22.1K
1%
R14
22.1K
1%
COUT1
47uF
16V
COUT1
47uF
16V
CP
(OPT)
CP
(OPT)
E6
VO+
E6
VO+
R13
(OPT)
R13
(OPT)
E2
VIN-
E2
VIN-
D1
5.1V
D1
5.1V
COUT4
10uF
16V
1210
COUT4
10uF
16V
1210
CIN4
(OPT)
1210
CIN4
(OPT)
1210
R2
51K
R2
51K
U1
LTM4613EV
U1
LTM4613EV
SGND
H12
DRVCC
E11
FSET
B12
COMP
A11
VFB
F12
PGOOD
G12
RUN
A10
TRACK/SS
A9
PLLIN
A8
INTVCC
A7
MPGM
A12
MARG0
C12
MARG1
D12
VIN
A1
VIN
A2
VIN
A3
VIN
A4
VIN
A5
VD
A6
VIN
B1
VIN
B2
VIN
B3
VIN
B4
VIN
B5
VD
B6
VD
C1
VD
C2
VD
C3
VD
C4
VD
C5
VD
C6
VOUT
J1
VOUT
J2
VOUT
J3
VOUT
J4
VOUT
J5
VOUT
J6
VOUT
J7
VOUT
J8
VOUT
J9
VOUT
J10
VOUT
K1
VOUT
K2
VOUT
K3
VOUT
K4
VOUT
K5
VOUT
K6
VOUT
K7
VOUT
K8
VOUT
K9
VOUT
K10
VOUT
K11
VOUT
L1
VOUT
L2
VOUT
L3
VOUT
L4
VOUT
L5
VOUT
L6
VOUT
L7
VOUT
L8
VOUT
L9
VOUT
L10
VOUT
L11
VOUT
M1
VOUT
M2
VOUT
M3
VOUT
M4
VOUT
M5
VOUT
M6
VOUT
M7
VOUT
M8
VOUT
M9
VOUT
M10
VOUT
M11
PGND
D1
PGND
D2
PGND
D3
PGND
D4
PGND
D5
PGND
D6
PGND
E1
PGND
E2
PGND
E3
PGND
E4
PGND
E5
PGND
E6
PGND
E7
PGND
F1
PGND
F2
PGND
F3
PGND
F4
PGND
F5
PGND
F6
PGND
F7
PGND
F8
PGND
F9
PGND
G1
PGND
G2
PGND
G3
PGND
G4
PGND
G5
PGND
G6
PGND
G7
PGND
G8
PGND
G9
PGND
H1
PGND
H2
PGND
H3
PGND
H4
PGND
H5
PGND
H6
PGND
H7
PGND
H8
PGND
H9
SGND
D9
MPGM
B11
MARG1
C11
DRVCC
E12
COMP
D11
MTP1
J12
MTP2
K12
MTP3
L12
VD
B7
VD
C7
RUN
B9
DRVCC
C10
FCB
M12
PGND
E8
PGND
G10
PGND
G11
PGND
H10
PGND
H11
VOUT
J11
R6
(OPT)
R6
(OPT)
R5
0 Ohm
R5
0 Ohm
C3
(OPT)
C3
(OPT)
Q1
SUD50N03-09
Q1
SUD50N03-09
C1
1uF
16V
C1
1uF
16V
C6
(OPT)
C6
(OPT)
J7
VIN
J7
VIN
E1
VIN+
E1
VIN+
COUT3
(OPT)
1210
COUT3
(OPT)
1210
JP5
3.3V
JP5
3.3V
R9
0 Ohm
R9
0 Ohm
E9
GND
E9
GND
C8
10uF
50V
1210
C8
10uF
50V
1210
JP2
H I
LO
MARG1
JP2
H I
LO
MARG1
1
3
2
R8
(OPT)
R8
(OPT)
COUT5
1uF
16V
COUT5
1uF
16V
JP6
5V
JP6
5V
CIN6
(OPT)
0805
CIN6
(OPT)
0805
R15
10K
R15
10K
E7
VO-
E7
VO-
CFF
47pF
CFF
47pF
J2
GND
J2
GND
J4
VOUT
J4
VOUT
E8
PLLIN
E8
PLLIN
E3
IOSTEP_CLK
E3
IOSTEP_CLK
JP1
H I
LO
MARG0
JP1
H I
LO
MARG0
1
3
2
R3
0.020
5%
1W
2512
R3
0.020
5%
1W
2512
R7
(OPT)
R7
(OPT)
+
COUT7
47uF
16V
7343
+
COUT7
47uF
16V
7343
JP4
ON
OFF
RUN
JP4
ON
OFF
RUN
1
3
2
E10
TRACK/SS
E10
TRACK/SS
C9
10uF
C9
10uF
R12
51K
R12
51K
J6
GND
J6
GND
scheMAtic DiAgrAM
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dc1743af
DEMO MANUAL DC1743A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
LINEAR TECHNOLOGY CORPORATION 2011
LT 0411 • 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
