DC1207A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
FB1
DESCRIPTION
DATE
APPROVED
4
PROD
06/26/12
EDWIN L.
L6
FERRITE BEAD
C10
OPT
REV
OPT
C11
OPT
C9
OPT
+
U1
LT3504EUFD
D
D
25
OPTIONAL CIRCUIT
24
C5
2.2uF
E1
VIN
VIN
5.4V - 40V C8
22uF
50V
C19
1uF
C27
1uF
C26
1uF
C20
OPT
50V
50V
50V
50V
50V
C28
OPT
50V
50V
11
26
28
DA1
VIN
VIN
FB1
VOUT1
R8
100k
C
E11
PG
FB2
3
2
1
ON
E14
RUN/SS2
DA2
RUN/SS1
JP2
10V
EN/UVLO
R6
200K
23
SW3
RUN/SS1
DA3
3
RUN/SS2
14
OFF
15
ON
E13
SW4
MBRM140T3G
R2
31.6k
C22
43pF
FB4
50V
GND
R10
C
10.2k 1%
3
E7
L3 4.2uH
4
MBRM140T3G
VOUT3
R3
21.5k
C23
82pF
1%
C14
C3
22uF 0.1uF
50V
6.3V
2.5V / 1A
E8
GND
R11
21
10.2k 1%
8
E9
L4 4.2uH
7
MBRM140T3G
VOUT4
R4
12.7k
C24
100pF
1%
C4
C15
22uF 0.1uF
6.3V
50V
1.8V / 1A
E10
GND
B
R12
19
10.2k 1%
GND
RT/SYNC
6.3V
3.3V / 1A
E6
29
RUN/SS4
DA4
GND
1%
(1MHz)
RUN/SS4
C2
C13
10uF 0.1uF
1%
D4
GND
R5
18.2k
GND
VOUT2
22
RUN/SS3
27
17
3
2
1
JP5
10V
1
3
2
OFF
RUN/SS4
C18
47nF
RUN/SS2
GND
ON
E16
RUN/SS4
12
RUN/SS3
5V / 1A
E4
E5
RUN/SS1
18
10V
JP4
C17
47nF
1
RUN/SS3
FB3
10
ON
E15
RUN/SS3
2
1
JP3
10V
50V
L2 8.2uH
2
D3
OFF
13
6.3V
10.2k 1%
PG
RUN/SS2
C16
47nF
C1
C12
10uF 0.1uF
VOUT1
R9
20
PG
RUN/SS
C7
47nF
16
JP1
1%
E12
RUN/SS1
SW2
1
C21
22pF
1%
D2
2
OFF
MBRM140T3G
R1
53.6k
E3
VIN
VIN
GND
6
VOUT1
VIN
EN/UVLO R7
1%
3 475k
ON
E2
B
C25
OPT
L1 8.2uH
5
D1
9
C6
1uF
SW1
SW5
L5
10uH
6.3V
+
SKY
OFF
SYNC
SYNC
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.
A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
MI
EDWIN L.
TITLE: SCHEMATIC
40V QUAD BUCK REGULATOR
SIZE
N/A
SCALE = NONE
2
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
IC NO.
LT3504EUFD
REV.
DEMO CIRCUIT 1207A
DATE: 06/26/12 14:30:03
SHEET 1
1
4
OF 1
A
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