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1dc1892afa
DEMO MANUAL DC1892A
Description
LTM4630EV High Efficiency, Dual 18A
Step-Down Power µModule Regulator
Demonstration circuit 1892A features the LTM®4630EV, the high efficiency, high density, dual 18A, switch mode step-down power module regulator. The input voltage is from 4.5V to 15V. The output voltage is programmable from 0.6V to 1.8V. DC1892A can deliver up to 18A maximum in each channel. As explained in the LTM4630 data sheet, output current derating is necessary for certain VIN, VOUT and thermal conditions. The board operates in continuous conduction mode in heavy load conditions. For high effi-ciency at low load currents, the MODE jumper (JP1) selects pulse-skipping mode for noise-sensitive applications or Burst Mode® operation in less noise-sensitive applications.
Two outputs can be connected in parallel for a single 36A output solution with optional jumper resistors. The board L, LT, LTC, LTM, Linear Technology, Linear logo and Burst Mode are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
BoarD photo
allows the user to program how its output ramps up and down through the TRACK/SS pin. The output can be set up to either coincidentally or ratiometrically track with another supply’s output. Remote output voltage sens-ing is available for improved output voltage regulation at the load point. These features and the availability of the LTM4630EV in a compact 16mm × 16mm × 4.41mm LGA package make it ideal for use in many high density point-of-load regulation applications. The LTM4630 data sheet must be read in conjunction with this demo manual for working on or modifying the demo circuit DC1892A.
Design files for this circuit board are available at http://www.linear.com/demo/DC1892A
Figure 1. DC1892A
2dc1892afa
DEMO MANUAL DC1892A
Quick start proceDureDemonstration circuit DC1892A is easy to set up to evalu-ate the performance of the LTM4630EV. Please refer to Figure 2 for proper measurement setup and follow the procedure below:
1. Place jumpers in the following positions for a typical application:
JP1 JP2 JP3 JP4 JP5 JP6
MODE RUN1 RUN2 TRACK1 SEL.
TRACK2 SEL.
CLKOUT PHASE
CCM ON ON SOFT-START
SOFT-START
90°
2. With power off, connect the input power supply, load and meters, as shown in Figure 1. Preset the load to 0A and the VIN supply to 12V.
3. Turn on the power supply at the input. The output volt-age in channel 1 should be 1.5V ± 1.5% (1.4775V ~ 1.5225V) and the output voltage in channel 2 should be 1V ± 1.5% (0.985V ~ 1.015V).
4. Once the proper output voltage is established, adjust the load within the operating range and observe the output voltage regulation, output voltage ripple, efficiency and other parameters. Output ripple should be measured at J1 and J2 with BNC cables. 50Ω termination should be set on the oscilloscope or BNC cables.
5. (Optional) For optional load transient test, apply an adjustable pulse signal between the IOSTEP CLK and GND test points. Pulse amplitude (3V ~ 3.5V) sets the load step current amplitude. The output transient current can be monitored at the BNC connector J3 (15mV/A). The pulse signal should have very small duty cycle (< 10%) to limit the thermal stress on the transient load circuit. Switch the jumper resistors R34 or R35 (on the backside of boards) to apply load transient on channel 1 or channel 2, correspondingly.
6. (Optional) LTM4630 can be synchronized to an external clock signal. Place the JP1 jumper on EXT_CLK and apply a clock signal (0 ~ 5V, square wave) on the CLKIN test point.
7. (Optional) The outputs of LTM4630 can track another supply. The jumpers JP4 and JP5 allow choosing soft-start or output tracking. If tracking external voltage is selected, the corresponding test points, TRACK1 and TRACK2, need to be connected to a valid voltage signal.
8. (Optional) LTM4630 can be configured for a 2-phase single output at up to 36A on DC1892A. Install 0Ω resistors on R14, R17, R28, R39 and remove R7, R19. Output voltage is set by R25 based on the equation:
VOUT = 0.6V • 1+ 60.4k
R25
performance summary Specifications are at TA = 25°C
PARAMETER CONDITIONS/NOTES VALUE
Input Voltage Range 4.5V ~ 15V
Output Voltage VOUT1 VIN = 4.5 ~ 15V, IOUT1 = 0A ~ 18A, JP1: CCM 1.5V ± 1.5% (1.4775V ~ 1.5225V)
Output Voltage VOUT2 VIN = 4.5 ~ 15V, IOUT2 = 0A ~ 18A, JP1: CCM 1V ± 1.5% (0.985V ~ 1.015V)
Per Channel Maximum Continuous Output Current Derating Is Necessary for Certain VIN, VOUT and Thermal Conditions. See the LTM4630 Data Sheet for Details
18A
Default Operating Frequency 500kHz
Resistor Programmable Frequency Range 250kHz to 780kHz
External Clock Sync. Frequency Range 400kHz to 780kHz
Efficiency of Channel 1 VIN = 5V, VOUT1 = 1.5V, IOUT1 = 18A, fSW = 500kHz 89.7%, See Figure 3
Efficiency of Channel 2 VIN = 5V, VOUT2 = 1V, IOUT2 = 18A, fSW = 500kHz 84.8%, See Figure 4
Load Transient of Channel 1 VIN = 12V, VOUT1 = 1.5V, ISETP = 9 ~ 18A See Figure 5
Load Transient of Channel 2 VIN = 12V, VOUT2 = 1V, ISETP = 9 ~ 18A See Figure 6
3dc1892afa
DEMO MANUAL DC1892A
Quick start proceDure
+ –
+ –
+
–A
+– A + –A
LOAD(0A TO 18A)
LOAD(0A TO 18A)
VIN4.5V TO 15V
+ –VOUT1
+–VOUT1
Figure 2. Test Setup of the DC1892A
4dc1892afa
DEMO MANUAL DC1892A
Figure 3. Measured Efficiency on Channel 1. VOUT1 = 1.5V, fSW = 500kHz, Channel 2 Disabled, CCM, 0A to 18A
Quick start proceDure
Figure 4. Measured Efficiency on Channel 2. VOUT2 = 1V, fSW = 500kHz, Channel 1 Disabled, CCM, 0A to 18A
LOAD CURRENT (A)0
65
EFFI
CIEN
CY (%
)90
85
80
75
70
95
10 12 14 16 182 4 6
dc1892a F03
8
VIN = 12V
VIN = 5V
LOAD CURRENT (A)0
65
EFFI
CIEN
CY (%
)
90
85
80
75
70
95
10 12 14 16 182 4 6
dc1892a F04
8
VIN = 12V
VIN = 5V
5dc1892afa
DEMO MANUAL DC1892A
Quick start proceDure
Figure 5. Measured Channel 1, 9A to 18A Load Transient (VIN = 12V, VOUT1 = 1.5V)
Figure 6. Measured Channel 2, 9A to 18A Load Transient (VIN = 12V, VOUT2 = 1V)
9A to 18A LOAD STEP
1.5V OUTPUT (20MHz BW) [50mV/DIV]
9A to 18A LOAD STEP
1V OUTPUT (20MHz BW) [50mV/DIV]
6dc1892afa
DEMO MANUAL DC1892A
Figure 7. Thermal Capture at 12VIN, 1.5VOUT1 at 18A and 1VOUT2 at 18A (TA = 25°C, 200 LFM Airflow and No Heat Sink)
Quick start proceDure
7dc1892afa
DEMO MANUAL DC1892A
parts ListITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 4 CIN2, CIN3, CIN4, CIN5 CAP., X5R, 22µF, 25V, 10%,1210 MURATA, GRM32ER61E226KE15
2 2 COUT1, COUT7, COUT9, COUT10 CAP., 470µF, 4V, POSCAP, F8 SANYO, 4TPE470MCL
3 2 COUT4, COUT5 CAP., X5R, 100µF, 6.3V, 20%, 1210 AVX, 12106D107MAT2A
4 2 R22, R26 RES., CHIP, 10, 1%, 0603 VISHAY, CRCW060310R0FKEA
5 1 R19 RES., CHIP, 90.9k, 1%, 0603 VISHAY, CRCW060390K0FKEA
6 1 R25 RES., CHIP, 40.2k, 1%, 0603 VISHAY,CRCW060340K2FKEA
7 1 R5, R30 RES., CHIP, 121k, 1%, 0603 VISHAY,CRCW0603121KFKEA
8 1 U1 LTM4630EV, 16×16×4.41-LGA LINEAR TECHNOLOGY, LTM4630EV
Additional Demo Board Circuit Components
9 1 CIN1 CAP., 150µF, 25V, ALUMINUM ELECTR., SUN ELECT., 25CE150AX
10 0 COUT2, COUT3, COUT6, COUT8 OPT, 1210
11 0 C1 OPT, 0805
12 1 C2 CAP., X7R, 1µF, 25V,10%, 0805 AVX, 08053C105KAT2A
13 2 C5, C7 CAP., X5R, 0.1µF, 25V, 10%, 0603 AVX, 06033D104KAT
14 0 C3, C4, C6, C8-C12 OPT, 0603
15 2 C13, C14 CAP., X7R, 0.01µF, 50V, 10%, 0603 AVX, 06035C103KAT2A
16 2 C15, C16 CAP., X7R, 1µF, 10V, 10%, 0603 AVX, 0603ZC105KAT2A
17 1 Q1 N-CHANNEL 30V MOSFET VISHAY, SUD50N03-09P
18 2 R1, R3, RES., CHIP, 10, 1%, 0603 VISHAY, CRCW060310R0FKEA
19 0 R2, R4, R6, R8, R11, R14, R16, R17, R20, R23, R28, R31, R33, R39, R40
OPT, 0603
20 4 R24, R27, R36 RES., CHIP, 10k, 1%, 0603 VISHAY, CRCW060310K0FKED
21 4 R7, R21, R29, R32 RES., CHIP, 0, 1%, 0603 VISHAY, CRCW06030000Z0ED
22 5 R9, R12, R15, R18 RES., CHIP, 60.4k, 1%, 0603 VISHAY, CRCW060360K4FKED
23 2 R10, R13 RES., CHIP, 6.04k, 1%, 0603 VISHAY, CRCW06036K04FKED
24 1 R34 RES., CHIP, 0Ω, 0.5W, 2010 VISHAY, CRCW20100000Z0EF
25 0 R35 OPT, 2010
26 1 R37 RES., CHIP, 0.015Ω, 2W, 2512 VISHAY, WSL2512R0150FEA
27 0 R38 OPT, 2512
Hardware: For Demo Board Only
28 16 E1, E3-E10, E12-E16 TESTPOINT, TURRET, 0.094" PBF MILL-MAX, 2501-2-00-80-00-00-07-0
29 3 J1, J2, J3 CONN, BNC, 5 PINS CONNEX 112404
30 6 J4-J9 JACK BANANA KEYSTONE, 575-4
31 1 JP1 HEADER, 4-PIN, 0.079", DOUBLE ROW SAMTEC, TMM104-02-L-D
32 1 JP6 HEADER, 4-PIN, 0.079", SINGLE ROW SAMTEC, TMM104-02-L-S
33 3 JP2, JP3, JP4 HEADER, 3-PIN, 0.079", SINGLE ROW SAMTEC, TMM103-02-L-S
34 1 JP5 HEADER, 3-PIN, 0.079", DOUBLE ROW SAMTEC, TMM-103-02-L-D
35 6 XJP1-XJP6 SHUNT, 0.079" CENTER SAMTEC, 2SN-BK-G
36 4 (STAND-OFF) STAND-OFF, NYLON, 0.50" KEYSTONE, 8833 (SNAP-ON)
8dc1892afa
DEMO MANUAL DC1892A5 5
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VVIN
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VIN
M8
VIN
M9
VIN
M1
0
VIN
M1
1
VINL2 VINL3 VINL4 VINL5 VINL6 VINL7 VINL8 VINL9
VIN
L1
0
VIN
L1
1
VINJ2 VINJ3 VINJ4
RU
N1
F5
TR
AC
K1
E5
VO
UT
S1
C5
VO
UT
1A
1
VO
UT
1A
2
VO
UT
1A
3
VO
UT
1A
4
VO
UT
1A
5
VF
B1
D5
SW
1G
2
PG
OO
D1
G9
CO
MP
1E
6
DIF
FO
UT
F8
DIFFNE9
DIFFPE8
FSETC6
PHASMDG4
GNDA6
GNDA7
GNDB6
GNDB7
GNDD1
GNDD2
GNDD3
GNDD4
GNDD9
GNDD10
GNDD11
GNDD12
GNDE1
GNDE2
GNDE3
GNDE4
GNDE10
GNDE11
GNDE12
GNDF1
GNDF2
GNDF3
GNDF10
GNDF11
GNDF12
GNDG1
GNDG10
GNDG12
GNDH1
GNDH2
GN
DH
3G
ND
H4
GN
DH
5G
ND
H6
GN
DH
7G
ND
H9
GN
DH
10
GN
DH
11
GN
DH
12
GN
DJ1
GN
DJ5
GN
DJ8
GN
DJ1
2G
ND
K1
GN
DK
5G
ND
K6
GN
DK
7G
ND
K8
GN
DK
12
GN
DL
1G
ND
L1
2G
ND
M1
GN
DM
12
SG
ND
C7
SG
ND
D6
SG
ND
F6
SG
ND
F7
SG
ND
G6
SG
ND
G7
VO
UT
1B
1
VO
UT
1B
2
VO
UT
1B
3
VO
UT
1B
4
VO
UT
1B
5
VO
UT
1C
1
VO
UT
1C
2
VO
UT
1C
3
VO
UT
1C
4
CO
MP
2E
7
PG
OO
D2
G8
SW
2G
11
VF
B2
D7
TR
AC
K2
D8
RU
N2
F9
VO
UT
S2
C8
TEMPJ6
MODE-PLLINF4
CLKOUTG5
INTVCCH8
EXTVCCJ7
VOUT2A8
VOUT2A9
VOUT2A10
VOUT2A11
VOUT2A12
VOUT2B8
VOUT2B9
VOUT2B10
VOUT2B11
VOUT2B12
VOUT2C9
VOUT2C10
VOUT2C11
VOUT2C12
GNDG3
J8
J8
R30
121K
R30
121K
J5
J5
JP
1
EX
T_C
LK
PS
CC
M
MO
DE
BM
JP
1
EX
T_C
LK
PS
CC
M
MO
DE
BM
1 3
2 4 65 7
8
R10
6.0
4K
R10
6.0
4K
C3
OP
T
C3
OP
TC
4O
PT
C4
OP
T
+C
OU
T1
470uF
4V
+C
OU
T1
470uF
4V
E12
PG
OO
D2
E12
PG
OO
D2
C7
0.1
uF
C7
0.1
uF
+C
OU
T10
470uF
4V
+C
OU
T10
470uF
4V
R32 0
R32 0
R15
60.4
K
R15
60.4
K
CIN
322uF
25V
1210
CIN
322uF
25V
1210
E13
EX
TV
CC
E13
EX
TV
CC
C6
OP
TC
6O
PT
R1
10
R1
10
R22
10
R22
10
C1
OP
T
0805
C1
OP
T
0805
CO
UT
8
OP
T1210
CO
UT
8
OP
T1210
R7
0R7
0
E14
CLK
OU
T
E14
CLK
OU
T
CO
UT
4100uF
6.3
V
1210
CO
UT
4100uF
6.3
V
1210
R21
0R21
0
CIN
222uF
25V
1210
CIN
222uF
25V
1210
E6
E6
E8
E8
R20
OP
T
R20
OP
T
C2
1uF
0805
C2
1uF
0805
J9
J9
CIN
522uF
25V
1210
CIN
522uF
25V
1210
+C
OU
T7
470uF
4V
+C
OU
T7
470uF
4V
R27
10K
R27
10K
JP
5
TR
AC
K2 S
EL.
VO
UT
1 JP
5
TR
AC
K2 S
EL.
VO
UT
11 3
2 4
56
C12
OP
T
C12
OP
T
R24
10K
R24
10K
R6
OP
T
R6
OP
T
R2
OP
T
R2
OP
T
JP
6JP
6
1 32
4
C11
OP
T
C11
OP
T
R8
OP
T
R8
OP
T
R5
121K
R5
121K
JP
2
OF
F
RU
N1
JP
2
OF
F
RU
N1
13
2
E10
TR
AC
K2
E10
TR
AC
K2
R18
60.4
KR
18
60.4
K
E9
E9
+C
IN1
150uF
25V
+C
IN1
150uF
25V
+C
OU
T9
470uF
4V
+C
OU
T9
470uF
4V
R9
60.4
K
R9
60.4
K
JP
4SO
FT
-ST
AR
T
TR
AC
K
JP
4SO
FT
-ST
AR
T
TR
AC
K
1
3
2
R26
10
R26
10
C9
OP
T
C9
OP
T
E3
PG
OO
D1
E3
PG
OO
D1
C8
OP
T
C8
OP
T
R12
60.4
KR
12
60.4
K
TP
1S
W1
TP
1S
W1
R13
6.0
4K
R13
6.0
4K
CO
UT
5100uF
6.3
V
1210
CO
UT
5100uF
6.3
V
1210
E5
E5
TP
2S
W2
TP
2S
W2
R29
0
R29
0
E16
CLK
IN E16
CLK
IN
R4
OP
T
R4
OP
T
R25
40.2
K
R25
40.2
K
schematic Diagram
9dc1892afa
DEMO MANUAL DC1892A
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
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22
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m
1
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22
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CY
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189
2A
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PT
25
12
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12
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9
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T
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9
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T
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0
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T
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4
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5
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12
R3
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12
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3
OP
T
R3
3
OP
T
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3
OP
T
R2
3
OP
T
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SU
D5
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03
-09
P
Q1
SU
D5
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03
-09
P
2
1
34
J2
J2
R3
5
OP
T
20
10
R3
5
OP
T
20
10
R2
8
OP
T
R2
8
OP
T
R3
6
10
K
R3
6
10
K
R1
4
OP
T
R1
4
OP
T
R3
1
OP
T
R3
1
OP
T J3
IOS
TE
P
J3
IOS
TE
PC1
6
1u
F
C1
6
1u
F
C1
5
1u
F
C1
5
1u
F
C1
3
0.0
1u
F
C1
3
0.0
1u
F
J1
J1
R1
7
OP
T
R1
7
OP
T
schematic Diagram
10dc1892afa
DEMO MANUAL DC1892A
Linear Technology Corporation1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2013
LT 0714 • 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
