DC2045A - Schematic

5
4
3
2
L1
XAL4030-332ME
ECO
REV
E2
GND
C1
22uF
25V
1812
C3
OPT
7343
C2
1uF
25V
C19
DNP
C14
47nF
25V
C15
10nF
25V
24
23
RUN1
RUN2
E6
C6
OPT
7343
+
C4
22uF
25V
1812
E7
GND
R6
1M
C5
1uF
25V
R7
374k
PGD
VIN2
CN2
19
SEL
CP2
4
MODE
RUN2
21
C17
47nF
25V
ITH
CN1
VIN2
VIN2
5V - 18V
FB
CM2
V1GD
5
RUN1
C16
10nF
25V
A
MODE
1
FIXED FREQ
2
3
AUTOBURST
MODE
V2GD
R1
402K
13
9
R12
DNP
C7
47uF
10V
1812
C21
DNP
C9
1uF
25V
C8
47uF
10V
1812
D
FOR VIN > 5 V
E4
GND
E5
GND
12 PGD
VCC
C10
1.8nF
1 SELECT
6 MODE
R3
40.2K
C11
22pF
R8
1M
R2
100k
C
E9
PGD
PGD
10 V1GD
VCC
11 V2GD
R9
1M
U1
V1GD
LTC3118EUFD
C18
4.7uF
0805
R10
1M
D1
NOTE: UNLESS OTHERWISE
SPECIFIED
2
E10
V1GD
VOUT
B
E11
V2GD
V2GD
BAT54XV2
REMOVE D1 IF VOUT > 5.5 VOLTS
E12
RUN2
1. ALL RESISTORS ARE IN OHMS, 0402
ALL CAPACITORS ARE IN MICROFARADS, 0603.
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
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
TECHNOLOGY
NC
JB
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
3
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
A
18V, 2A Buck-Boost DC/DC Converter
with Low-Loss Dual Input PowerPath
IC NO.
DATE:
REV.
LTC3118EUFD
DEMO CIRCUIT 2045A
N/A
SCALE = NONE
RUN2
TITLE: SCHEMATIC
SIZE
4
E3
8
JP2
5
10 - 3 - 14
VCC
CUSTOMER NOTICE
VCC
JB
VOUT
5.0V / 2A
R11
49.9
1
JP1
DATE
VCC
C20
DNP
B
VCC
SELECT
1
IDEAL DIODE
2
SELECT
3
PRIORITY
APPROVED
PRODUCTION FAB
14
CP1
20
E8
VOUT
CM1
18
C
SW2
RUN1
22
R5
715k
15
C13
0.1uF
VIN1
3
RUN1
R4
1M
BST2
GND
+
2
2
DESCRIPTION
VOUT
7
2.5V - 18V
BST1
PGND
E1
16
25
VIN1
VIN1
VCC
C12
0.1uF
SW1
17
-
D
1
REVISION HISTORY
10 - 3 - 14
2
2
SHEET
1
1
OF
1
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