DC1450A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
1
DESCRIPTION
2
APPROVED
PRODUCTION
JIAN L.
DATE
11-16-09
1
VIN
R1
(OPT)
2
D
RUN/SS
D2
BAS16HT1
(OPT)
SOD-323
D
E1
R11
(OPT)
VIN
2
15K
2200pF 2
C
1
11
C12
R5
(OPT) 20K
C6 1nF
12
7
ITH
FB
VIN
SENSE-
INTVCC
SENSE+
BG
GND
(OPT)
5
4
R3
5
6
7
C4
0.1uF
16V
0
C
L1
4
10
9
8
1
TG
R4
2
VIN
2.2uH
RS1
0.005
TDK RLF7030T
D1
CMDSH-3
8
R9
10
BG
C8
0.1uF
50V
R7
(OPT)
C10
4.7uF
16V
R13
10
VOUT
2.5V/5A
E8
COUT1 + COUT2
220uF
47uF
6.3V
4V
R8
(OPT)
13
R10
42.2K
BOOST
GND
R6
C11
(OPT)
Q1
Si4816BDY
TG
C3
GND
E4
3
R2
CIN3
18uF
35V
SW
2
150pF
6
RUN/SS
1
C2
SW
+
2
3
LTC3854EDDB
3
E3
CIN1
4.7uF
50V
U1
C1
0.1uF
OFF
VIN
4.5V - 26V
VIN
1
JP1
RUN
ON
GND
E9
R12
0
B
B
VIN
CIN2
(OPT)
TG
4
5
3
6
FDS6982AS
(OPT)
SW
A
Q2B
BG
2
7
Q2A
1
8
FDS6982AS
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
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
APPROVALS
PCB DES.
APP ENG.
HZ
JIAN L.
TECHNOLOGY
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
HIGH EFFICIENCF STEP-DOWN DC-DC CONVERTER
SIZE
N/A
SCALE = NONE
2
IC NO.
REV.
LTC3854EDDB
2
DEMO CIRCUIT 1450A
DATE: Monday, February 22, 2010
SHEET 1
1
OF 1
A
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