8
dc2378abfa
DEMO MANUAL DC2378A-B
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.
schematic Diagram
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
VO1+
VO1-
VO2-
VO2+
ON
TRACK1
ON
EXT.
SOFT-START
TRACK1 SEL.
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS AND CAPACITORS ARE 0603.
m
SW2
SW1
VOUT1
VIN
INTVCC
VO1+
VO1-
INTVCC
VO1-
VO1+
INTVCC
VOUT1
VO2+
VO2-
VIN
INTVCC
INTVCC
DIFFP
COMP1
VFB1
DIFFN
DIFFOUT
VOUT1S
VOUT1
TRACK1
RUN1
VO2+
VOUT2
VO2-
VOUT2S
RUN2
TRACK2
VFB2
COMP2
INTVCC
TEMP
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
PRODUCTION
1
4-26-16
__
JL
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
PRODUCTION
1
4-26-16
__
JL
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
PRODUCTION
1
4-26-16
__
JL
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
Tuesday, April 26, 2016
12
STEP-DOWN MODULE REGULATOR
LT
JL
N/A
LTM4650EY-1
DEMO CIRCUIT 2378A-B
HIGH EFFICIENCY, DUAL 25A, SINGLE 50A,
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
Tuesday, April 26, 2016
12
STEP-DOWN MODULE REGULATOR
LT
JL
N/A
LTM4650EY-1
DEMO CIRCUIT 2378A-B
HIGH EFFICIENCY, DUAL 25A, SINGLE 50A,
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
Tuesday, April 26, 2016
12
STEP-DOWN MODULE REGULATOR
LT
JL
N/A
LTM4650EY-1
DEMO CIRCUIT 2378A-B
HIGH EFFICIENCY, DUAL 25A, SINGLE 50A,
COUT14 100uF 6.3V 1210
E4
R16 OPT
JP3
OFF
RUN2
1
3
2
E15
TEMP
COUT13 100uF 6.3V
E7
C10 220pF
R19 90.9K
C5 0.1uF
R3 10
J4
E1
CIN4 22uF
1210
25V
COUT2
100uF 6.3V
COUT6
100uF 6.3V 1210
+
COUT1
OPT 2.5V
C4 OPT
C3 OPT
R10 6.04K
JP1
EXT_CLK
PS
CCM
MODE
BM
1
3
2
4
6
5
7
8
J5
J6
1.5V / 25A
VOUT1
R30
121K
U1
LTM4650EY-1
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
VOUT1S
C5
VOUT1
A1
VOUT1
A2
VOUT1
A3
VOUT1
A4
VOUT1
A5
VFB1
D5
SW1
G2
PGOOD1
G9
COMP1
E6
DIFFOUT
F8
DIF
FN
E9
DIF
FP
E8
FSE
T
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
VOUT2S
C8
TEMP
J6
MODE-PLLIN
F4
CLK
OU
T
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
JP5
VOUT1
TRACK2 SEL.
1
3
2
4
5
6
C7
0.1uF
R46 21K
E12
PGOOD2
E13
EXTVCC
CIN3 22uF 25V 1210
R15
60.4K
R32
0
COUT16 100uF
6.3V
R1
10
C6 OPT
+
COUT17
OPT 7343
+
COUT18 470uF 2.5V 7343
+
COUT10 470uF 2.5V
7343
R42
OPT
E6
CIN2 22uF 25V 1210
R21
0
COUT4
100uF 6.3V 1210
E14
CLKOUT
R7 0
C1 4.7uF
R22
10
COUT15
100uF 6.3V 1210
C2 1uF
R47 20K
R20
OPT
E8
R2 OPT
R6 OPT
R41
OPT
R24
10K
C12 47pF
J9
GND
R27
10K
+
COUT7 OPT 7343
CIN5 22uF 25V 1210
JP2
OFF
RUN1
1
3
2
R5
100K
R8 OPT
C11
OPT
COUT8 100uF
6.3V
R18 60.4K
E10
TRACK2
+
COUT12
470uF 2.5V
7343
R9
60.4K
+
CIN1 330uF 25V
E9
C17 3.3nF
R12
60.4K
C8 OPT
E3
PGOOD1
C9
OPT
R26
10
+
COUT11 OPT 2.5V
JP4
SOFT-START
TRACK
1
3
2
E5
COUT5 100uF 6.3V 1210
R13
6.04K
C18 4.7nF
J7
GND
E16
CLKIN
R29
0
J8
1V / 25A
VOUT2
R25
40.2K
COUT3 100uF 6.3V 1210
+
COUT9
470uF 2.5V 7343
R4
OPT
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