DC1999A - Schematic

A
B
C
C4
0.1uF
U1
6
REV
-
3
7
C2
47uF
16V
1210
+
C3
1uF
0603
5
3
VCC
12
PWM/SYNC
3
C12
1uF
0603
E3
4
SW2
BST1
BST2
VIN
VOUT
SNSGND
COMP
VCC
FB
PWM/SYNC
RUN
GND
RUN
13
SW1
LTC3111EDE
NC
SGND
DESCRIPTION
APPROVED
DATE
JB
2 - 6 - 14
PRODUCTION FAB
C5
0.1uF
9
E2
VOUT
10
1
C6 22pF
C7
R4
2
41.2K
1500pF
11
C8
47pF
R3
11.5K
14
TIE R2 TO PIN 14 THEN TIE PIN 14
TO GND PLANE UNDER IC
4
VOUT
5.0V / 1.5A
R7
49.9
1%
8
15
4
C1
OPT
TANT
ECO
10uH
VIN
2.5V - 15.0V
E
REVISION HISTORY
L1
VIN
E1
D
R1
845k
1%
Vin > 5.0 V
C9
100uF
1210
16V
C10
1uF
0603
R2
158K
1%
3
E4
GND
GND
VIN
ON
RUN
OFF
2
1
2
3
JP1
R5
1M
1%
GND
RUN
C11
100pF
R6
DNP
CUSTOMER NOTICE
NOTE: UNLESS
OTHERWISE
SPECIFIED
1
RUN
E5
1. ALL RESISTORS ARE IN
OHMS, 0402.
2. INSTALL SHUNTS
AS SHOWN.
B
1
2
3
BURST
PWM/SYNC
2
JP2
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
A
800kHz
OSC SYNC
VCC
PWM
TECHNOLOGY
NC
JB
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
15V, 1.5A SYNCHRONOUS BUCK-BOOST DC / DC CONVERTER
SIZE
IC NO.
N/A
SCALE = NONE
C
DATE:
REV.
LTC3111EDE
DEMO CIRCUIT 1999A
2 - 6 - 14
3
SHEET
D
1
E
1
OF
1
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