5
dc1821bf
DEMO MANUAL DC1821B
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
RUN
ON
OFF
BURST MODE
MODE
FIXED FREQ
GND
VOUT
VIN
LDO
MODE
MODE
RUN
RUN
VIN
LDO
SIZE
DATE:
IC NO.
REV.
SHEET
OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035 Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
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
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
1
DEMO CIRCUIT 1821B
1
1
WITH PROGRAMMABLE OUTPUT CURRENT
N/A
LTC3114-1EDHC
NC
J.NOON
11 - 7 - 15
40V, 1A SYNCHRONOUS BUCK - BOOST DC / DC CONVERTER
SIZE
DATE:
IC NO.
REV.
SHEET
OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035 Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
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
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
1
DEMO CIRCUIT 1821B
1
1
WITH PROGRAMMABLE OUTPUT CURRENT
N/A
LTC3114-1EDHC
NC
J.NOON
11 - 7 - 15
40V, 1A SYNCHRONOUS BUCK - BOOST DC / DC CONVERTER
SIZE
DATE:
IC NO.
REV.
SHEET
OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035 Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
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
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
1
DEMO CIRCUIT 1821B
1
1
WITH PROGRAMMABLE OUTPUT CURRENT
N/A
LTC3114-1EDHC
NC
J.NOON
11 - 7 - 15
40V, 1A SYNCHRONOUS BUCK - BOOST DC / DC CONVERTER
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
J.NOON
PRODUCTION
-
6-6-16
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
J.NOON
PRODUCTION
-
6-6-16
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
J.NOON
PRODUCTION
-
6-6-16
E3
VOUT
5.0V / 1A
+
C7 OPT
R1 2M
1%
C8 1uF
50V
E4
GND
E1
VIN
2.7V - 40V
C4 22uF
25V
R2 499k
1%
C6 10uF
50V
C14
DNP
C13 22uF
25V
C5 1uF
25V
R3 10k
JP2
1 2 3
D1
PMEG2010AEH
C9
4700pF
C1 68nF
R7
DNP
JP1
1 2 3
C12 DNP
R4
27.4k
D2
PMEG6020ER
L1
6.8uH
C11 47nF
E2
GND
C10 10pF
C2 68nF
R5
1M
C3 4.7uF
6.3V
U1
LTC3114-1
SW1
15
RUN
4
BST1
13
PVIN
14
VIN
10
GND
8
MODE
16
PLDO
11
GND
17
PVOUT
3
BST2
12
SW2
2
PROG
5
PGND
1
LDO
9
FB
7
VC
6
R6
DNP
R8 49.9
1%
