DC1220B - Schematic

1
2
3
4
5
6
7
8
A
A
U1
LTC3225EDDB
VIN
E1
C6
0.22uF
2.9-5.5V
GND
L1 10nH
1
2
Etch Inductor
E2
C1
1uF
10V
E4
1
GND
GND
C+
2
C-
4
SHDN
5
PGOOD
E3
R4
100k
5%
COUT
10
+
VOUT
R3
100k
5%
PGOOD
VIN
C2
2.2uF
10V
8
B
SHDN
VOUT
9
exposed pad, solder side
VIN
CX
3
+
PROG
7
VSEL
6
VIN
4.8V or 5.3V
GND
C3
OPT
B
R2
15k
JP3
150mA
30mA
VIN
ICHRG
JP2
RUN
5.3V
SHDN
4.8V
Unless Noted: All Resistors are 0402, 1%, 1/16W
All Capacitors are 0603, 6.3V 10%
C
VOUT SELECT
CUSTOMER NOTICE
CONTRACT NO.
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
CIRUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
APPROVALS
TECHNOLOGY
DRAWN:
J. Drew
TITLE:
CHECKED:
APPROVED:
3
4
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
SCHEMATIC
LTC3225EDDB Low Profile Regulated Dual Cell SuperCAP Charger
ENGINEER:
J. Drew
SIZE
DESIGNER:
DWG NO.
DATE:
5
Wednesday, July 23, 2008
6
B
SHEET 1
7
D
REV
DC1220B
A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
2
VOUT
E6
R1
60.4k
R5
100k
5%
11
JP1
C
1
C5
0.22uF
COUT
0.20F
HS203F
5.5V
GND
E7
D
E5
C4
OPT
8
OF 1
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