DC1155A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
2
DESCRIPTION
APPROVED
DATE
PRODUCTION
CHARLIE Z.
09-21-09
D
D
R5
10
D3
36V
VIN
C1
10uF
35V
+6V
C2
10uF
35V
C3 +
10uF
35V
C7
(OPT)
D4
B0540W
R7
10K
1
SENSE+
TP6
R10
2
SENSE-
R22
C13
47pF
R12
113K 1%
C16
(OPT)
4
RUN
C19
1000pF
1
OFF
3
7
R17
ON
2
6
C20
(OPT)
8
(OPT)
JP2A BURST
C21
1000pF
+6V
JP2B
10
11
DCM
4
23
EXTVCC
12
CCM
+6V
13
16
D5
1N5819HW
Q1A
Si4942DY
C9
22uF
16V
C5
22uF
16V
C6
22uF +
16V
C8
(OPT)
TP3
VOUT
[email protected] max
TP5
GND
SGND
PGND
RUN
BG1
FCB
BG2
PLLFLTR
SW2
PLLIN
TG2
EXTVCC
+6V
C15
1uF
21
L1
C18
4.7uF
10uH
C
C14
0.1uF
IHLP4040DZ-01
19
Q2A
Si4942DY
2
20
18
Q1B
Si4942DY
D6
B0540W
4
17
STBYMD
R23
NC
NC
NC
NC
NC
NC
NC
NC
15
14
R26 0
C22
0.22uF
16V
25
28
29
D7
B0540W
SENSE+
R25
1
C24
1nF
SENSE-
32
R19
0.025
2%
+6V
33
R20
12.4K 1%
22
VOSENSE
BOOST2
9
JP2C
R8
10
VOUT
ITH
INTVCC
5
(OPT)
JP1
RUN
26
SENSE-
R13
8.06K
1%
C12
3.3nF
4.7V
Q2B
Si4942DY
3
D1
VIN
24
7
8
R15
51K
SENSE+
VOS+
C4
0.22uF
16V
1
VOS+
R11
30K
SW1
0
5
6
VIN
BOOST1
R24
2
3
C
U1
LTC3780EUH
TG1
C11
68pF
100 1%
SS
SGND
SGND
100 1%
PGOOD
TP8
3
31
R9
GND
1
TP4
27
7
8
30
5
6
EXTVCC
C10
0.22uF
VIN
6V - 32V
TP1
+6V
PGOOD
TP2
47.5K 1%
B
B
SYNC
TP10
RUN
R21
(OPT)
C23
0.01uF
A
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.
CONTRACT NO.
APPROVALS
PCB DES.
HELEN
ENG.
CHARLIE
TECHNOLOGY
TITLE: SCHEMATIC
HIGH EFFICIENCY BUCK-BOOST DC/DC 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
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
A
DATE:
IC NO.
REV
LTC3780EUH
2
DEMO CIRCUIT 1155A
Tuesday, November 24, 2009
SHEET
1
1 OF 1
A
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