DC1877A - Schematic

5
4
3
2
ECO
REVISION HISTORY
REV
1
DESCRIPTION
1
APPROVED
PRODUCTION
Charlie Z.
DATE
7-9-13
D
D
U1
LTC3630AEDHC
E1
VIN
VIN
4V - 76V
C1
220nF
100V
0805
R5
4.7
0805
R2
OPT ON
D1
OPT
GND
C2
4.7uF
100V
2220
R1
OPT
1
3
L1
VIN
SW
VFB
68uH
SUMIDA CDRH105
B A
2
5
3
RUN
VPRG1
E4
1
VOUT
C9
1.8V/3.3V/5V
0.1uF 500mA
GND
E3
GND
VOUT
JP2
C
E6
2
C10
OPT
1210
10
C11
OPT
1210
C4
47nF
GND
GND
15
NC
NC
NC
NC
1
2
6
C8
OPT
1210
17
2
C3
4
220pF 13
GND
R4
220k
SS
8
OPT
ISET
14
11
VIN
GND
E5
FBO
16
R3
VPRG2
JP1
C7
100uF
10V
1210
R7
OPT
B A
3
12
C6
100uF
10V
1210
2
2
7
3
FBO
C5
OPT
R6
0
9
JP3
OFF
C
E2
VOUT
1
B
B
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS AND CAPACITORS ARE 0603.
2
VOUT
JP1
JP2
1.8V
B
B
3.3V
A
B
5.0V
B
A
EXT. R
A
A
A
CUSTOMER NOTICE
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APP ENG.
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
TECHNOLOGY
HZ
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
Charlie Z. TITLE: SCHEMATIC
SCALE = NONE
A
HIGH EFFICIENCY, 76V, 500mA SYNCHRONOUS
STEP-DOWN CONVERTER
SIZE
IC NO.
REV.
LTC3630AEDHC
1
N/A
DEMO CIRCUIT 1877A
DATE:
Monday, July 15, 2013
2
SHEET 1
1
OF 1
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