DC1883A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
__
DESCRIPTION
1
APPROVED
PRODUCTION
JIM N.
DATE
01-17-12
D
D
VIN
E1
C8
VIN
2.5V - 15V
E2
MODE
1
BURST MODE
2
3
FIXED FREQ
JP2
+
C9
OPT
7343
C2
1uF
E3
VOUT
1.8V / 300mA
15uH
LPS4018
C7
12pF
U1
LTC3103EDD
VIN
1
10
7
R4
1M
1%
6
4
VIN
BST
MODE
SW
RUN
FB
VCC
GND
C3
22uF
1206
C4
1uF
PGOOD
NC
3
2
8
C
E5
5
PGOOD
9
R6
1M
1%
11
C6
1uF
R3
1M
1%
R1
2M
1%
R2
2.21K
GND
GND
C
C1
10uF
0.1uF
VOUT
L1
E4
GND
VIN
RUN
1
2
3
ON
OFF
R5
1M
1%
ALL CIRCUIT GND CONNECTIONS SHOULD RETURN TO PIN 4
CONNECT GND SIDE OF R6 DIRECTLY TO PIN 4
R7
OPT
1%
JP1
C5
OPT
B
B
CUSTOMER NOTICE
A
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE 0402 AND CAPACITORS ARE 0603.
2. INSTALL SHUNTS AS SHOWN.
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.
TECHNOLOGY
LT
JIM N.
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
15V, 300mA, SYNCHRONOUS STEP-DOWN DC/DC
CONVERTER WITH 1.8uA QUIESCENT CURRENT
SIZE
N/A
SCALE = NONE
2
DATE:
IC NO.
REV.
LTC3103EDD
DEMO CIRCUIT 1883A
Tuesday, January 17, 2012
1
SHEET 1
1
OF 1
A
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