1
dc1892afb
DEMO MANUAL DC1892A
DESCRIPTION
LTM4630EV
High Efficiency, Dual 18A
Step-Down Power
µModule
®
Regulator
Demonstration circuit 1892A features the LT M
®
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 V
IN
, V
OUT
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.
Tw o 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, μModule 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
2
dc1892afb
DEMO MANUAL DC1892A
QUICK START PROCEDURE
Demonstration 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 V
IN
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
cir
cuit. 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:
V
OUT
= 0.6V • 1+
60.4k
R25
PERFORMANCE SUMMARY
Specifications are at T
A
= 25°C
PARAMETER CONDITIONS/NOTES VALUE
Input Voltage Range 4.5V ~ 15V
Output Voltage V
OUT1
V
IN
= 4.5 ~ 15V, I
OUT1
= 0A ~ 18A, JP1: CCM 1.5V ± 1.5% (1.4775V ~ 1.5225V)
Output Voltage V
OUT2
V
IN
= 4.5 ~ 15V, I
OUT2
= 0A ~ 18A, JP1: CCM 1V ± 1.5% (0.985V ~ 1.015V)
Per Channel Maximum Continuous Output Current Derating Is Necessary for Certain V
IN
, V
OUT
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 V
IN
= 5V, V
OUT1
= 1.5V, I
OUT1
= 18A, f
SW
= 500kHz 89.7%, See Figure 3
Efficiency of Channel 2 V
IN
= 5V, V
OUT2
= 1V, I
OUT2
= 18A, f
SW
= 500kHz 84.8%, See Figure 4
Load Transient of Channel 1 V
IN
= 12V, V
OUT1
= 1.5V, I
SETP
= 9 ~ 18A See Figure 5
Load Transient of Channel 2 V
IN
= 12V, V
OUT2
= 1V, I
SETP
= 9 ~ 18A See Figure 6
3
dc1892afb
DEMO MANUAL DC1892A
QUICK START PROCEDURE
+
–
+
–
+
–
A
+
–
A
+
–
A
LOAD
(0A TO 18A)
LOAD
(0A TO 18A)
V
IN
4.5V TO 15V
+
–
V
OUT1
+
–
V
OUT1
Figure 2. Test Setup of the DC1892A
4
dc1892afb
DEMO MANUAL DC1892A
Figure 3. Measured Efficiency on Channel 1. V
OUT1
= 1.5V,
f
SW
= 500kHz, Channel 2 Disabled, CCM, 0A to 18A
QUICK START PROCEDURE
Figure 4. Measured Efficiency on Channel 2. V
OUT2
= 1V,
f
SW
= 500kHz, Channel 1 Disabled, CCM, 0A to 18A
LOAD CURRENT (A)
0
65
EFFICIENCY (%)
90
85
80
75
70
95
10 12 14 16 182 4 6
dc1892a F03
8
V
IN
= 12V
V
IN
= 5V
LOAD CURRENT (A)
0
65
EFFICIENCY (%)
90
85
80
75
70
95
10 12 14 16 182 4 6
dc1892a F04
8
V
IN
= 12V
V
IN
= 5V
5
dc1892afb
DEMO MANUAL DC1892A
QUICK START PROCEDURE
Figure 5. Measured Channel 1, 9A to 18A Load Transient
(V
IN
= 12V, V
OUT1
= 1.5V)
Figure 6. Measured Channel 2, 9A to 18A Load Transient
(V
IN
= 12V, V
OUT2
= 1V)
9A to 18A LOAD STEP
1.5V OUTPUT (20MHz BW) [50mV/DIV]
9A to 18A LOAD STEP
1V OUTPUT (20MHz BW) [50mV/DIV]
6
dc1892afb
DEMO MANUAL DC1892A
Figure 7. Thermal Capture at 12V
IN
, 1.5V
OUT1
at 18A and
1V
OUT2
at 18A (T
A
= 25°C, 200 LFM Airflow and No Heat Sink)
QUICK START PROCEDURE
7
dc1892afb
DEMO MANUAL DC1892A
PARTS LIST
ITEM 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 1 C1 CAP., X5R, 4.7µF, 25V,10%, 0805 AVX, 08053D475KAT2A
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
O
PT, 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)
8
dc1892afb
DEMO MANUAL DC1892A
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
VIN+
VIN-
VIN
GND
4.5V - 15V
VOUT1
GND
VO1+
VO1-
1.5V / 18A
1.0V / 18A
GND
VO2-
VO2+
VOUT2
ON
TRACK1
CLKOUT
PHASE
120
90
60
o
o
o
ON
EXT.
SOFT-START
TRACK1 SEL.
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE 0603.
m
VOUT1
VIN
INTVCC
VO1+
VO1-
INTVCC
VO1-
VO1+
INTVCC
INTVCC
VOUT1
VO2+
VO2-
VIN
INTVCC
DIFFP
COMP1
VFB1
DIFFN
DIFFOUT
VOUT1S
VOUT1
TRACK1
RUN1
VO2+
VOUT2
VO2-
VOUT2S RUN2
TRACK2
VFB2
COMP2
INTVCC
TEMP
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
HAORAN W.PRODUCTION1 01-21-15
__
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
HAORAN W.PRODUCTION1 01-21-15
__
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
HAORAN W.PRODUCTION1 01-21-15
__
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 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
1
Wednesday, January 21, 2015
12
HIGH EFFICIENCY, DUAL 18A STEP-DOWN MODULE REGULATOR
LT
HAORAN W.
N/A
LTM4630EV
DEMO CIRCUIT 1892A
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 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
1
Wednesday, January 21, 2015
12
HIGH EFFICIENCY, DUAL 18A STEP-DOWN MODULE REGULATOR
LT
HAORAN W.
N/A
LTM4630EV
DEMO CIRCUIT 1892A
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 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
1
Wednesday, January 21, 2015
12
HIGH EFFICIENCY, DUAL 18A STEP-DOWN MODULE REGULATOR
LT
HAORAN W.
N/A
LTM4630EV
DEMO CIRCUIT 1892A
E15
TEMP
E15
TEMP
JP3
OFF
RUN2
JP3
OFF
RUN2
13
2
J7J7
R16
OPT
R16
OPT
J6J6
E4E4
C10
OPT
C10
OPT
COUT3
OPT
1210
COUT3
OPT
1210
E7E7
COUT6
OPT
1210
COUT6
OPT
1210
COUT2
OPT
1210
COUT2
OPT
1210
CIN4
22uF
1210
25V
CIN4
22uF
1210
25V
E1E1
J4J4
R3
10
R3
10
C5
0.1uF
C5
0.1uF
R19
90.9K
R19
90.9K
U1
LTM4630EV
U1
LTM4630EV
VIN
J9
VIN
J10
VIN
J11
VIN
K2
VIN
K3
VIN
K4
VIN
K9
VIN
K10
VIN
K11
VIN
M2
VIN
M3
VIN
M4
VIN
M5
VIN
M6
VIN
M7
VIN
M8
VIN
M9
VIN
M10
VIN
M11
VIN
L2
VIN
L3
VIN
L4
VIN
L5
VIN
L6
VIN
L7
VIN
L8
VIN
L9
VIN
L10
VIN
L11
VIN
J2
VIN
J3
VIN
J4
RUN1
F5
TRACK1
E5
VOUTS1
C5
VOUT1
A1
VOUT1
A2
VOUT1
A3
VOUT1
A4
VOUT1
A5
VFB1
D5
SW1
G2
PGOOD1
G9
COMP1
E6
DIFFOUT
F8
DIFFN
E9
DIFFP
E8
FSET
C6
PHASMD
G4
GND
A6
GND
A7
GND
B6
GND
B7
GND
D1
GND
D2
GND
D3
GND
D4
GND
D9
GND
D10
GND
D11
GND
D12
GND
E1
GND
E2
GND
E3
GND
E4
GND
E10
GND
E11
GND
E12
GND
F1
GND
F2
GND
F3
GND
F10
GND
F11
GND
F12
GND
G1
GND
G10
GND
G12
GND
H1
GND
H2
GND
H3
GND
H4
GND
H5
GND
H6
GND
H7
GND
H9
GND
H10
GND
H11
GND
H12
GND
J1
GND
J5
GND
J8
GND
J12
GND
K1
GND
K5
GND
K6
GND
K7
GND
K8
GND
K12
GND
L1
GND
L12
GND
M1
GND
M12
SGND
C7
SGND
D6
SGND
F6
SGND
F7
SGND
G6
SGND
G7
VOUT1
B1
VOUT1
B2
VOUT1
B3
VOUT1
B4
VOUT1
B5
VOUT1
C1
VOUT1
C2
VOUT1
C3
VOUT1
C4
COMP2
E7
PGOOD2
G8
SW2
G11
VFB2
D7
TRACK2
D8
RUN2
F9
VOUTS2
C8
TEMP
J6
MODE-PLLIN
F4
CLKOUT
G5
INTVCC
H8
EXTVCC
J7
VOUT2
A8
VOUT2
A9
VOUT2
A10
VOUT2
A11
VOUT2
A12
VOUT2
B8
VOUT2
B9
VOUT2
B10
VOUT2
B11
VOUT2
B12
VOUT2
C9
VOUT2
C10
VOUT2
C11
VOUT2
C12
GND
G3
J8J8
R30
121K
R30
121K
J5J5
JP1
EXT_CLK
PS
CCM
MODE
BM
JP1
EXT_CLK
PS
CCM
MODE
BM
1
3
2
4
65
7 8
R10
6.04K
R10
6.04K
C3
OPT
C3
OPT
C4
OPT
C4
OPT
+
COUT1
470uF
4V
+
COUT1
470uF
4V
E12
PGOOD2
E12
PGOOD2
C7
0.1uF
C7
0.1uF
+
COUT10
470uF
4V
+
COUT10
470uF
4V
R32
0
R32
0
R15
60.4K
R15
60.4K
CIN3
22uF
25V
1210
CIN3
22uF
25V
1210
E13
EXTVCC
E13
EXTVCC
C6
OPT
C6
OPT
R1
10
R1
10
R22
10
R22
10
C1
4.7uF
0805
C1
4.7uF
0805
COUT8
OPT
1210
COUT8
OPT
1210
R7
0
R7
0
E14
CLKOUT
E14
CLKOUT
COUT4
100uF
6.3V
1210
COUT4
100uF
6.3V
1210
R21
0
R21
0
CIN2
22uF
25V
1210
CIN2
22uF
25V
1210
E6E6
E8E8
R20
OPT
R20
OPT
C2
1uF
0805
C2
1uF
0805
J9J9
CIN5
22uF
25V
1210
CIN5
22uF
25V
1210
+
COUT7
470uF
4V
+
COUT7
470uF
4V
R27
10K
R27
10K
JP5
TRACK2 SEL.
VOUT1
JP5
TRACK2 SEL.
VOUT1
1
3
2
4
5 6
C12
OPT
C12
OPT
R24
10K
R24
10K
R6
OPT
R6
OPT
R2
OPT
R2
OPT
JP6JP6
1
3
2
4
C11
OPT
C11
OPT
R8
OPT
R8
OPT
R5
121K
R5
121K
JP2
OFF
RUN1
JP2
OFF
RUN1
1 3
2
E10
TRACK2
E10
TRACK2
R18
60.4K
R18
60.4K
E9E9
+
CIN1
150uF
25V
+
CIN1
150uF
25V
+
COUT9
470uF
4V
+
COUT9
470uF
4V
R9
60.4K
R9
60.4K
JP4
SOFT-START
TRACK
JP4
SOFT-START
TRACK
1
3
2
R26
10
R26
10
C9
OPT
C9
OPT
E3
PGOOD1
E3
PGOOD1
C8
OPT
C8
OPT
R12
60.4K
R12
60.4K
TP1
SW1
TP1
SW1
R13
6.04K
R13
6.04K
COUT5
100uF
6.3V
1210
COUT5
100uF
6.3V
1210
E5E5
TP2
SW2
TP2
SW2
R29
0
R29
0
E16
CLKIN
E16
CLKIN
R4
OPT
R4
OPT
R25
40.2K
R25
40.2K
SCHEMATIC DIAGRAM
9
dc1892afb
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
2
2
1
1
D D
C C
B B
A A
OPTIONAL JUMPER FOR 1 OUTPUT CONFIGURATION
DIFF SENSING SELECTION
VOUT1
m
LOAD TRANSIENT CIRCUIT
VOUT2
TEMP INTVCC
RUN1 RUN2
TRACK1 TRACK2
VFB1 VFB2
COMP1 COMP2
VO2- DIFFN
VO2+ DIFFP
VOUT1S VOUT1
VOUT2S DIFFOUT
VOUT1
VOUT2
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 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
1
Wednesday, January 21, 2015
22
HIGH EFFICIENCY, DUAL 18A STEP-DOWN MODULE REGULATOR
LT
HAORAN W.
N/A
LTM4630EV
DEMO CIRCUIT 1892A
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 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
1
Wednesday, January 21, 2015
22
HIGH EFFICIENCY, DUAL 18A STEP-DOWN MODULE REGULATOR
LT
HAORAN W.
N/A
LTM4630EV
DEMO CIRCUIT 1892A
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 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
1
Wednesday, January 21, 2015
22
HIGH EFFICIENCY, DUAL 18A STEP-DOWN MODULE REGULATOR
LT
HAORAN W.
N/A
LTM4630EV
DEMO CIRCUIT 1892A
E17
IOSTEP CLK
E17
IOSTEP CLK
R36
10K
R36
10K
R39
OPT
R39
OPT
R23
OPT
R23
OPT
J3
IOSTEP
J3
IOSTEP
Q1
SUD50N03-09P
Q1
SUD50N03-09P
2
1
3
4
R35
OPT
2010
R35
OPT
2010
C13
0.01uF
C13
0.01uF
R14
OPT
R14
OPT
J1J1
R11
OPT
R11
OPT
C14
0.01uF
C14
0.01uF
E18
GND
E18
GND
R34
0 OHm
0.5W
2010
R34
0 OHm
0.5W
2010
R28
OPT
R28
OPT
R38
OPT
2512
R38
OPT
2512
R33
OPT
R33
OPT
R40
OPT
R40
OPT
C16
1uF
C16
1uF
R17
OPT
R17
OPT
R37
0.015
1W
2512
R37
0.015
1W
2512
J2J2
R31
OPT
R31
OPT
C15
1uF
C15
1uF
SCHEMATIC DIAGRAM
10
dc1892afb
DEMO MANUAL DC1892A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
LINEAR TECHNOLOGY CORPORATION 2013
LT 0115 REV B • 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. 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.
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 LTC applica-
tion engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
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