DC1476A - Schematic

1
2
3
4
5
6
7
8
L1
10uH
U1
LT3980EMSE
A
C1
0.47uF
VIN
GND
B
+
C2
10uF
100V
C3
2.2uF
100V
1210
E2
1
2
3
4
SHDN
EXTSS
EXTSS
BD
RT
7
11
BOOST
VC
6
12
SW
NC
5
13
NC
FB
4
14
VIN
NC
3
15
DA
PG
2
16
NC
SYNC
1
exposed pad,
solder side
R6
100k
1%
JP1
RUN
8
RUN/SS
L2
TBD
C
C9
0.01uF
100V
C10
2.2uF
100V
1210
C6
1500pF
BURST MODE
3
B
C5
0.1uF
1
2
3
E4
GND
E5
PGOOD
E7
SYNC
C
CONTRACT NO.
APPROVALS
DRAWN
Kevin Lac
DATE
8/2/09
CHECKED
ENGINEER Kevin Huang
8/2/09
DESIGNER
Thursday, August 06, 2009
4
TECHNOLOGY
TITLE
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LT3980EMSE
D
2A, 58V STEP-DOWN SWITCHING REGULATOR WITH 75 A QUIESCENT CURRENT
APPROVED
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
2
VOUT
5V / 2A
C11
10uF
100V
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.
1
C4
47uF
10V
JP2
CUSTOMER NOTICE
D
R4
100k
1%
C7
100pF
SYNC
VIN
+
R3
536k
1%
E3
OPTIONAL CIRCUIT
FB1
Bead
R2
100k
1%
R5
15k
C8
0.1uF
E6
VIN
R1
56.2k
1%
17
VIN
6.8V - 58V
TRANSIENT TO 80V
E1
GND
10
GND
9
D1
B260A
2
1
A
5
SIZE CAGE CODE
SCALE:
DWG NO
FILENAME:
6
REV
A
DEMO CIRCUIT 1476A
SHEET
7
1
OF
8
1
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