7
dc2453afb
DEMO MANUAL DC2453A
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
4V - 20V
GND
VOUT3
GND
CLKIN
TRACK2
VIN
1.5V / 3A MAX
1.2V / 3A MAX
VOUT4
GND
3.3V / 3A MAX
VOUT1
GND
2.5V / 3A MAX
VOUT2
GND
TEMP
ON
OFF
ON
OFF
ON
OFF
ON
OFF
TRACK1
TRACK3
TRACK4
OPTIONAL JUMPERS FOR PARALLEL OPERATION
CCM
DCM
7343
7343
7343
RUN1
RUN2
RUN3
RUN4
7343
7343
m
1210
1210
1210
1210
VIN+
GND
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS AND CAPACITORS ARE 0603.
MODE4
CCM
DCM
MODE3
CCM
DCM
MODE2
CCM
DCM
MODE1
VIN
VOUT3
INTVCC3
INTVCC4
VOUT4
INTVCC1
SS1
FB1
VOUT1
COMP1
INTVCC2
SS2
COMP2
SS3
SS4
FB1
FB3
FB4
FB2
FB2
FB3
COMP2
COMP3
COMP1
COMP3
COMP4
COMP2
SS2
SS3
SS1
SS3
SS4
SS2
RUN2
RUN3
RUN1
RUN3
RUN4
RUN2
COMP4
COMP3
VOUT2
VOUT3
VOUT1
VOUT3
VOUT4
VOUT2
FB2
FB4
FB3
VOUT2
INTVCC1
INTVCC2
INTVCC3
INTVCC4
VIN
RUN1
RUN2
RUN3
RUN4
RUN1
RUN2
RUN3
RUN4
INTVCC4
INTVCC3
INTVCC1
INTVCC2
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
LTM4643EV
Wednesday, July 29, 2015
1
1
QUAD 3A STEP-DOWN MODULE REGULATOR
LT
SAM Y.
N/A
DEMO CIRCUIT 2453A
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
LTM4643EV
Wednesday, July 29, 2015
1
1
QUAD 3A STEP-DOWN MODULE REGULATOR
LT
SAM Y.
N/A
DEMO CIRCUIT 2453A
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
LTM4643EV
Wednesday, July 29, 2015
1
1
QUAD 3A STEP-DOWN MODULE REGULATOR
LT
SAM Y.
N/A
DEMO CIRCUIT 2453A
REVISION HISTORY DESCRIPTION
DATE
APPROVED
ECO
REV
SAM Y.
PRODUCTION
1
07-29-15
_
REVISION HISTORY DESCRIPTION
DATE
APPROVED
ECO
REV
SAM Y.
PRODUCTION
1
07-29-15
_
REVISION HISTORY DESCRIPTION
DATE
APPROVED
ECO
REV
SAM Y.
PRODUCTION
1
07-29-15
_
JP31
2
3
R25 100K 1%
R20 150K
+
C8 OPT
JP7
1
2
3
JP11
2
3
R8
0
R1
10K
E4
R38
OPT
R18 OPT
C22 OPT
R39
OPT
C4 22uF 25V 1206
C25 0.1uF
TP2
PGOOD2
C30 OPT 1206
R45
OPT
R12 60.4K
R35
OPT
E7
C32 100pF
C5 22uF 25V 1206
R28
0 0805
R46
OPT
2512
+
C37 OPT
C21 OPT
TP1
PGOOD1
JP5
1
2
3
R10 OPT
C41 OPT
JP21
2
3
JP8
1
2
3
+
C18 OPT
C3 22uF 25V 1206
C13 100pF
E11
J2
C38 OPT 1206
TP3
PGOOD3
E10
C14 OPT 1206
C46 0.1uF
C26 0.1uF
JP41
2
3
C9 47uF 6.3V
R26 100K 1%
R44
OPT
R21 150K
R19 150K
E9
C28 47uF 6.3V
C42 OPT
R17 OPT
R27 100K
E8
R24 100K 1%
E3
C11 OPT 1206
R34
OPT
R7
0
R30 100K
C45 0.1uF
C12 OPT 1206
R33
OPT
E15
R36
OPT
2512
R11 19.1K
R41
OPT
2512
TP4
PGOOD4
R23 100K 1%
R29 100K
E1
E17
R40
OPT
JP6
1
2
3
C29 47uF 6.3V 1206
C16 47uF 6.3V 1206
E14
C10 47uF 6.3V 1206
TP5
CLKOUT
C36 47uF 6.3V
E16
R9 OPT
LTM4643EV
U1
GND
B2
VOUT1
A1
VOUT3
F1
VOUT4
J1
VOUT2
C1
GND
D3
GND
A4
PGOOD2
C2
PGOOD3
F2
PGOOD4
J2
PGOOD1
C3
TEMP
F3
CLKOUT
J3
INTVCC1
C4
INTVCC2
F4
INTVCC3
J4
INTVCC4
K5
TRACK/SS1
A6
MODE1
B6
RUN1
C6
TRACK/SS2
D6
MODE2
E6
RUN2
F6
TRACK/SS4
K6
MODE4
L6
RUN4
K7
FB4
J7
TRACK/SS3
G6
MODE3
H6
RUN3
J6
FB1
A7
COMP1
B7
CLK
IN
C7
FB2
D7
COMP2
E7
SGN
D
F7
FB3
G7
COMP3
H7
COMP4
L7
VIN1
B3
VIN2
E3
VIN3
H3
VIN4
L3
SVIN1
B5
SVIN2
E5
SVIN3
H5
SVIN4
L5
GND
A5
GND
B1
VOUT1
A2
VOUT1
A3
VIN3
H4
VIN4
L4
VIN2
E4
VIN1
B4
VOUT3
G1
VOUT3
G2
VOUT4
K2
VOUT4
K1
GND
L1
GND
H1
GND
E1
GND
E2
GND
H2
GND
L2
GND
G3
GND
K3
GND
D4
GND
G4
GND
K4
GND
C5
GND
D5
GND
F5
GND
G5
GND
J5
VOUT2
D2
VOUT2
D1
E6
R31 100K
E13
R4 40.2K
C6 1uF
C15 OPT 1206
C34 OPT 1206
C31 OPT
C17 47uF 6.3V
C1 22uF 25V 1206
E5
+
C2 33uF 25V
R43
OPT
E12
J1
R37
OPT
R16
0
C33 OPT 1206
R32
OPT
R3 13.3K
R15
0
C35 47uF 6.3V 1206
R22 150K
R42
OPT
+
C27 OPT
C7 OPT
R2
1
