5
dc1999af
DEMO MANUAL DC1999A
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
A
A
B
B
C
C
D
D
E
E
4
4
3
3
2
2
1
1
PWM
800kHz
BURST
OSC SYNC
1. ALL RESISTORS ARE IN OHMS, 0402.
2. INSTALL SHUNTS AS SHOWN.
NOTE: UNLESS OTHERWISE SPECIFIED
RUN
RUN
ON
OFF
TANT
1210
0603
1210
0603
0603
Vin > 5.0 V
VIN
VOUT
VCC
PWM/SYNC
VCC
PWM/SYNC
RUN
VIN
RUN
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
3
DEMO CIRCUIT 1999A
1
1
15V, 1.5A SYNCHRONOUS BUCK-BOOST DC / DC CONVERTER
N/A
LTC3111EDE
NC
JB
2 - 6 - 14
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
3
DEMO CIRCUIT 1999A
1
1
15V, 1.5A SYNCHRONOUS BUCK-BOOST DC / DC CONVERTER
N/A
LTC3111EDE
NC
JB
2 - 6 - 14
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
3
DEMO CIRCUIT 1999A
1
1
15V, 1.5A SYNCHRONOUS BUCK-BOOST DC / DC CONVERTER
N/A
LTC3111EDE
NC
JB
2 - 6 - 14
E5
GND
E5
GND
C10 1uF
C10 1uF
C7
1500pF
C7
1500pF
E2
VOUT
5.0V / 1.5A
E2
VOUT
5.0V / 1.5A
C11
100pF
C11
100pF
R3 11.5K
R3 11.5K
E3
GND
E3
GND
E4
GND
E4
GND
+
C1
OPT
+
C1
OPT
C5 0.1uF
C5 0.1uF
R5 1M
1%
R5 1M
1%
JP2JP2
1 2 3
C12 1uF
C12 1uF
C9 100uF
16V
C9 100uF
16V
R1 845k
1%
R1 845k
1%
JP1JP1
1 2 3
C6
22pF
C6
22pF
C8 47pF
C8 47pF
C2 47uF
16V
C2 47uF
16V
R4
41.2K
R4
41.2K
R6
DNP
R6
DNP
C4 0.1uF
C4 0.1uF
R2 158K
1%
R2 158K
1%
E1
VIN
2.5V - 15.0V
E1
VIN
2.5V - 15.0V
L1
10uH
L1
10uH
U1
LTC3111EDE
U1
LTC3111EDE
SW1
6
NC
11
BST1
7
SGND
14
VIN
5
VCC
12
PWM/SYNC
13
RUN
4
SW2
9
SNSGND
3
BST2
8
VOUT
10
COMP
1
FB
2
GND
15
C3 1uF
C3 1uF
R7 49.9
1%
R7 49.9
1%
