DC1881A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
__
2
DESCRIPTION
APPROVED
DATE
PRODUCTION
CHARLIE Z.
4-23-12
D
D
TP3
R20 0
INTVCC
R7
100K
TP4
100
R16 1K
TP10
JP2
MODE
PULSE SKIP
CCM
1
2
CC1
CC2
RC
0.01uF
13K
3
C11
68pF
1
100pF
2
3
4
R21
5
121K
R24
10K
6
VIN+
JP1
RUN
ON
INTVCC
1
2
OFF
3
R30
41.2K
R31
12.1K
B
D8
BZX84C5V1
R22
OPT
C7
0.1uF 50V
7
C8
0.1uF
8
50V
R25
0
R14
100
9
R13
100
17
SENSE1-
BOOST1
ITH
PGND
SGND
BG1
R11
22
C4
0.22uF
16V
GND
INTVCC
RUN
BG2
VINSNS
BOOST2
VOUTSNS
TG2
ILIM
SW2
TRIM
C18 10uF
18
6.3V
D7
DFLS160
VOUT
R26
10
0805
C24
1uF
16V
5
6
3
VOUT
C19
C20
22uF
16V
1210
0.25W
TP13
+ COUT1
OPT
16V
12V / 2.5A MAX
R8
10
VOS+
C
D6
DFLS160
TP14
GND
Q2B
Si4288DY
C13
(OPT)
2
R29
(OPT)
R1 0
16
15
C22
0.22uF
16V
14
13
12
B
R18
0.015
1W
R6 OPT
C10
TP12
C12
(OPT)
1206
D5
DFLS160
0
INTVCC
FREQ
4
C29
C23
(OPT)
1210
XAL7070
4
R27
C17
C16
22uF
16V
1210
L1 5.6uH
Q1A
Si4288DY
20
MODE/PLLIN
EXTVCC
0
D4
DFLS160
21
7
8
1
19
VIN
R17 0
SENSE1+
10
VOUT
VIN+
SW1
R23 0
24
R28
(OPT)
1206
Q2A
Si4288DY
7
8
R10
28
SS
23
Q1B
Si4288DY
2
1
100
TG1
R2 0.015
5
6
R9
INTVCC
EXTVCC
TP7
VOUT
VOUT1
3
TP5
VFB
SGND
27
IOSENSE-
26
10
29
CF1 OPT
CSS
0.1uF
25
U1
LTC3789EUFD
11
CF
22pF
PGOOD
RFB1
113K
C15
1uF
50V
0805
IOSENSE+
RFB2 8.06K
PLLIN
C14
(OPT)
1210
VIN
6V - 36V
R5
VOS+
SS
C35
(OPT)
1210
C26
10uF
50V
1210
VIN+
PGOOD
C
TP6
C9
C25
10uF
50V
1210
VIN+
R12 OPT
2.2uF
R4
100
R3 100
NOTE: UNLESS OTHERWISE SPECIFIED
A
A
CUSTOMER NOTICE
1. ALL RESISTORS ARE 0603.
ALL CAPACITORS ARE 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
APP ENG.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
TECHNOLOGY
HZ
CHARLIE Z. TITLE: SCHEMATIC
HIGH EFFICIENCY COMPACT BUCK-BOOST CONVERTER
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
2
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
N/A
SCALE = NONE
DATE:
IC NO.
REV.
LTC3789EUFD
DEMO CIRCUIT 1881A
Tuesday, May 15, 2012
2
SHEET 1
1
OF 1
Similar pages