DC1432A - Schematic

5
4
3
2
1
REVISION HISTORY
This circuit is proprietary to Linear Technology and supplied
for use with Linear Technology parts.
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
Applications Engineering for assistance.
ECO
REV
DESCRIPTION
DATE
3
PRODUCTION
11/05/08
R.YING
10/01/09
R.YING
09/24/10
DING L.
1
3.1
2
3.2
IC CHANGE, PART VALUE CHANGES
PART VALUE CHANGE, C22, R31
APPROVED
INTVCC
D
D
MODE/PLLIN
VIN
CCM BURST P.S.
CIN4
OPT
R46
1%
E4
MODE/PLLIN
JP1
OFF
1
3
C22
TG
4
BG
2
3
7
8
1K
10nF
SW
VIN
3
Q1
RJK0305DPB
CIN3
22uF
25V
R47
C20
1nF
VIN
2
JP2
E1
4.5V - 14V
+ CIN1
150uF
16V
5
ON
1
97.6K 1%
R31
2
RUN
EXTCLK
1
350K
VIN
J1
FREQ/PLLFLTR
R30
E5
VIN
5
6
200K
Q5
OPT
Si4816BDY
5
JP3
3
INTVCC
4
2
1
TG
4
CIN6
22uF
25V
CIN5
OPT
J2
CIN7
OPT
GND
E6
4
GND
OPT
RUN
Q2
OPT
1
2
3
OPT
1
2
3
R48
C23
OPT
C
VOUT
SW
3
4
OPT
7
ILIM
R41
0
COUT3
47uF
6.3V
4
INTVCC
ILIM
+ COUT2
330uF
2.5V
GND
E8
BG
10
1.5V / 15A
J4
OPTIONAL DCR
SENSING
9
GND
R27
OPT
INTVCC
C27
2.2uF
10V
+ COUT1
330uF
2.5V
Q4
OPT
VIN
2.2
5
14
15
13
TG
SW
5
4
VOUT
0.002 OHM
FB
8
VOUT
16
C19
1uF
BG
R39
43.2K
1%
11
SENSE+
C32
OPT
VIN
R37
Q3
RJK0329DPB
C31
4.7uF
10V
6
C29
2
CMDSH-3
ITH
GND
R38
49.9K
1%
TK/SS
D2
1
0
J3
RSNSE
INTVCC
R36
12
VOUT
0.4uH
1
2
3
2
OPT
BOOST
SENSE-
470pF
C25
0.1uF
10V
1
2
3
R35
RUN
GND
R40
6.49K
1%
1
0.1uF 10V
C28
5
3300pF
MODE/PLLIN
C24
C26
L1
FREQ/PLLFLTR
U1
[1]
C
E7
R32 0
TRK/SS
17
E2
R29
OPT
C18
OPT
C30
B
B
E9
1nF
[1]
R1
OPT
INTVCC
R42
R43
[1]
OPT
R44
R45
OPT
OPT
R10
100
R9
100
[1]
A
ASSY
U1
R42
E9
-A
LTC3851AEUD
OPT
ISET
-B
LTC3851AEUD-1
100K
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN INCHES
TOLERANCE ON ANGLE - - 2 PLACES - - - 3 PLACES - - INTERPRET DIM AND TOL
PER ASME Y14.5M -1994
PGOOD
THIRD ANGLE PROJECTION
CONTRACT NO.
APPROVALS
DRAWN
MI
CHECKED
DATE
05/16/08
DING L.
09/24/10
APPROVED
ENGINEER
TECHNOLOGY
SCH, LTC3851AEUD/LTC3851AEUD-1, SYNCHRONOUS
BUCK CONVERTER
CAGE CODE
DWG NO
5
4
3
Friday, September 24, 2010
SCALE:NONE
2
REV
DC1432A
Custom
DO NOT SCALE DRAWING
A
TITLE
SIZE
DESIGNER
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
FILENAME: 1432A-3.dsn
SHEET
1
3.2
1
OF
1
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