DC1271A - Schematic

5
4
3
2
1
1
VIN
R1
(OPT)
2
D
RUN/SS
D2
BAS16HT1
(OPT)
SOD-323
VIN+
E2
D
E1
E3
CIN1
10uF
16V
1
JP1
RUN
ON
C1
0.1uF
5
U1
LTC3854EDDB
Q1
RJK0305DPB
4
3
OFF
3 RUN/SS
Q2
(OPT)
CIN2
(OPT)
CIN4
(OPT)
CIN5
10uF
16V
+
CIN3
180uF
16V
CIN6
(OPT)
CIN7
(OPT)
5
2
VIN
4.5V - 14V
VIN
R11
(OPT)
GND
E4
4
E6
VIN-
11 SENSE-
R6
C5
(OPT)
R10
17.4K
(OPT)
INTVCC 9
VIN
INTVCC
D1
CMDSH-3
RS1
0.002
FDA1055
TOKO
Q4
(OPT)
COUT1
100uF
6.3V
BG 8
7 GND
4
C8
0.1uF
16V
COUT2 + COUT3 + COUT4 + COUT5 +
330uF
(OPT)
330uF
100uF
2.5V
4V
6.3V
2.5V
C
GND
E9
4
R7
(OPT)
Q3
RJK0330DPB
C10
4.7uF
16V
VOUT
[email protected]
E8
COUT6
(OPT)
4V
2
12 SENSE+
13 GND
C6 1nF
R4
2
0.56uH
R13
47
R9
47
VOUT-
E10
1
2
3
R5
20K
VIN 10
L1
5
1 FB
C
R3 0
VOUT+
E7
C4
0.1uF
16V
5
BOOST 4
1
2
3
TG 5
C3
2 ITH
2200pF
1
2
3
5.62K
1
R2
47pF
1
2
3
SW 6
C2
R8
(OPT)
NOTE: ONLY APPLY LOAD FROM E8 TO E9
R12
0
B
B
CUSTOMER NOTICE
A
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
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
CONTRACT NO.
APPROVALS
DRAWN
DATE
HELEN
5/20/08
Mike S.
5/204/08
TECHNOLOGY
TITLE
APPROVED
DESIGNER
Monday, April 06, 2009
2
SIZE
A
LTC3854EDDB High Efficiency,
Small Footprint Step-Down DC-DC Converter
CHECKED
ENGINEER
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
CAGE CODE
SCALE:
FILENAME:
DWG NO
REV
A
DC1271A
SHEET
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OF
1
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