DC1887A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
__
2
DESCRIPTION
APPROVED
PRODUCTION
Goran P.
DATE
10-16-13
D
D
L1
7
+
C10
10uF
1
ON
GND
JP1
RUN
C1
10uF
10V
2
2
C6
1uF
3
5
C5
120pF
18
SW2
17
SW2
VOUTS
R8
12.1k
0.1%
MID
15
14
R3
301K
11
E6
C12
10F
13
C3
10uF
PGOOD
RSENP
RSENS
PFO
PROG
MAXV
E5
127k
E7
JP4
PULL UP SOURCE
PGOOD
1
2
VIN
VOUT
3
4
5
6
VOUT
VPWR
APP ENG.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
VPWR
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
APPROVALS
PCB DES.
PFO
B
VIN
TECHNOLOGY
HZ
Goran P. TITLE: SCHEMATIC
BUCK-BOOST SUPERCAPACITOR CHARGER AND BALANCER
SIZE
IC NO.
N/A
3
C
R6
1Meg
R7
10
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.
4
GND
8
CUSTOMER NOTICE
5
MID
R5
1Meg
12
E10
A
VOUT
4.2V / 1A
C9
10F
+
C8
330mF
5.5V
+
RUN
20
B
C11
1uF
OPT
VIN
FB
4
3
E9
VOUTP
V+
C2
10uF
3 BAL
R1
1.87Meg
16
E3
C4
10uF
10V
RSENS
VOUTP
C7
1uF
OFF
E4
U1
LTC3128EUFD
PFI
GND
1.72V - 5.5V
C
E2
2
9
VIN
E1
VIN
VOUT
1
VOUT
R4
OPT
GND
VOUT
GND
6
21
5
6
VIN
19
4
SW1
3
R2 0
1
PFI
SW1
E8
3.3uH
2
1
PFI
JP3
MODE
SCALE = NONE
REV.
LTC3128EUFD
DEMO CIRCUIT 1887A
2
Tuesday, November 12, 2013
DATE:
2
SHEET 1
1
OF 1
A
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