DC1821A - Schematic

5
4
3
2
1
REVISION HISTORY
L1
ECO
6.8uH
D
13
E1
VIN
2.7V - 40V
10
14
LTC3114-1
BST1
BST2
PVOUT
VIN
PLDO
PVIN
LDO
E2
R3
21k
MODE
VC
12
D1
3
PROG
R5 1M
VIN
B
1
2
3
ON
OFF
JP1
FIXED FREQ
RUN
R6
BURST MODE
C12
DNP
DATE
J.NOON
12 - 13 - 13
C3
4.7uF
6.3V
9
LDO
R1
2M
1%
VOUT
R7
DNP
DNP
6
C4
22uF
25V
C13
22uF
25V
C5
1uF
25V
C
R2
499K
1%
C10
10pF
R4
27.4k
E4
GND
MODE
1
2
3
D
5.0V / 1A
C14
7
U1
E3
R8
49.9
1%
11
GND
RUN
PRODUCTION
APPROVED
VOUT
C9
4700pF
PGND
C11
10nF
3
C2
68nF
1
5
FB
GND
16
MODE
RUN
17
C8
1uF
50V
GND
C
C7
OPT
4
RUN
8
C6
10uF
50V
+
DESCRIPTION
2
15
-
SW2
VIN
SW1
C1
68nF
REV
GND
LDO
B
MODE
JP2
DNP
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
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
TECHNOLOGY
NC
J.NOON
TITLE: SCHEMATIC
40V, 1A SYNCHRONOUS BUCK - BOOST DC / DC CONVERTER
WITH PROGRAMMABLE OUTPUT CURRENT
SIZE
N/A
SCALE = NONE
3
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
DATE:
IC NO.
REV.
LTC3114-1EDHC
DEMO CIRCUIT 1821A
12 - 13 - 13
3
SHEET
2
1
1
OF
1
A
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