DC1754A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
VIN
E1
VIN
2.5V - 15V
C1
10uF
1210
D
+
C9
OPT
7343
U1
LTC3104EDE
2
1
6
R4
1M
10
9
VIN
C6
1uF
R10
1M
JIM N.
B
ON
OFF
1
2
3
8
5
VIN
C7
12pF
BST
MODE
SW
RUNLDO
FB
RUN
PGOOD
VCC
VINLDO
NC
GND
VLDO
FBLDO
C3
22uF
10V
1206
R1
2M
1%
R8
1M
D
C4
1uF
4
R2
2.21K
3
R3
1M
11
E6
7
PGOOD
14
C
13
VLDO
12
R5
2M
1%
VIN
R6
442K
1%
R7
1M
1%
C11
OPT
1206
VOUT
1
2
3
VIN
VOUT
JP4
E5
VLDO
1.8V / 10mA
C5
4.7uF
6.3V
ALL CIRCUIT GND CONNECTIONS SHOULD RETURN TO PIN 5
E4
GND
B
R9
OPT
JP1
01-12-12
VOUT
3.3V / 300mA
VIN
RUN
DATE
E3
15
RUNLDO
1
ON
2
3
OFF
JP2
PRODUCTION
15uH
0.1uF
VIN
C
2
APPROVED
L1
C8
E2
MODE
1
BURST MODE
2
3
FIXED FREQ
JP3
DESCRIPTION
VOUT
C2
1uF
25V
GND
GND
REV
__
C10
1nF
OPT
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE 0402 AND CAPACITORS ARE 0603.
2. INSTALL SHUNTS AS SHOWN.
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.
A
TECHNOLOGY
LT
JIM N.
TITLE: SCHEMATIC
15V, 300mA, SYNCHRONOUS STEP-DOWN DC/DC
CONVERTER WITH 2.8uA QUIESCENT CURRENT AND 10mA LDO
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
IC NO.
DATE:
REV.
LTC3104EDE
DEMO CIRCUIT 1754A
N/A
SCALE = NONE
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
Thursday, January 12, 2012
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