DC1318A - Schematic

4
3
1
R1
1M
CSS
0.1UF
OPTIONAL SNUBBER CIRCUIT
INTVCC
D
DCM
CCM
E4
PGOOD
C3 100PF
C4
R6
1000PF 4.99K
C
VOUT
SELECT
JP2
1.5V
JP3
1.8V
R9
R10
66.5K 49.9K
E7
R7
100K
C5
47PF
JP4
2.5V
JP5
3.3V
R11
31.6K
R12
22.1K
C6
OPT
R8
255K
SGND
SGND
RUN/SS
BOOST
NC
NC
SW
PVIN
PVIN
PVIN
PVIN
PVIN
PVIN
PVIN
PVIN
PVIN
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
SGND
SGND
VON
PGOOD
VRNG
ITH
FCB
SGND
ION
SGND
VFB
EXTVCC
SGND
SGND
SGND
SGND
PVIN
SW
PGND
U1
LTC3611EWP
PVIN
PVIN
PVIN
PVIN
PVIN
SW
SW
SW
SW
SW
SW
SW
SW
PGND
PGND
PGND
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
SGND
VOUT R17
0
B
EXTVCC
E2
C7
OPT
CIN1 +
CIN2
4.7UF
50V
1210
J1
CIN3
100UF
50V
CIN4
CIN5
4.7uF
50V
1210
OPT
SANYO
50ME100WX
L1
1.0UH
VIN
E1 9V - 32V
J2
E3 PGND
VOUT
CO1
CO2 +
100UF
6.3V
1812
CO3
CO4
330UF
6.3V
7343
OPT
E5
J3
CO6
CO5
22UF
6.3V
0805
NOTES: UNLESS OTHERWISE SPECIFIED
Q1
SUD50N03
VOUT
C10
4.7UF
6.3V
C9
0.1UF
50V
R16
10K
A
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE 0603.
2. INSTALL SHUNT ON JP1 PINS 1 AND 2, JP3.
CONTRACT NO.
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
CIRUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
APPROVALS
DRAWN:
CHECKED:
APPROVED:
TECHNOLOGY
KIM T.
J5
VOUT
B
J6
IOSTEP
5mV/A
R5
0.005
2512
E8
IOSTEP
CLK
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
A
HIGH INPUT VOLTAGE AND HIGH CURRENT DENSITY STEP-DOWN CONVERTER
ENGINEER:
MANJING X. SIZE
DESIGNER:
C
E6
DYNAMIC LOAD CIRCUIT
CUSTOMER NOTICE
VOUT
10A MAX.
J4 PGND
1
C8
4.7UF
16V
0805
CIN6
CIN7
1210
OPT
VOUT
VISHAY
IHLP-4040DZ-11
R13
2
INTVCC
EXTVCC
C11
OPT
0805
VIN
SGND
PGOOD
R3
10K
D
0805
R14
4.7
RUN/SS
JP6
C2
0.01UF
R4
100K
3
2
1
R18
OPT
SW
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
R2
35.7K
INTVCC
SGND
SGND
SVIN
SVIN
SVIN
INTVCC
INTVCC INTVCC
SW
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
INTVCC
FCB
D1
C1
SDM10K45
0.22UF 16V
2
1 BOOST
3
RUN/SS
1
ON
2
3
OFF
JP1
2
2
5
DWG NO.
A
DC1318A * LTC3611EWP
Thursday, January 17, 2008
DATE:
2
SHEET
1
REV
A
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