DC957A - Schematic

5
4
3
2
1
MAIN CIRCUIT
C7
4.7UF 6.3V
VCC
VBST1 21
5 ILSET
TG1
TG1 20
TG1
6 CCM
SW1
SW1 19
SW1
9 NC
ISVOUT 10
13 SW2
VBST2 11
D2
CMDSH-3-LTC
TG2
TG2
L1
2.2UH
PHILIPS
TDK
RLF7030T-2R2M5R4
7
8
C11
0.1UF
VOUT
E7 VOUT
[email protected]
C14
47UF
6.3V
1210
C16
150UF
6.3V
6032
D4
PMEG1030EH
C15
0.1UF
E8
GND
SW2
BG2
BG2
5
SW2
B
Q2B
FDS6894A
4
3
B
D3
PMEG2020EJ
Q2A
FDS6894A
2
C9
0.22UF
10V
25
TG2 12
Q1B
FDS6894A
4
VDRV 16
15 BG2
14 ISSW2
C
BG1
BG1
BG1 17
2
R10
10K
GND
Q1A
FDS6894A
2
ISSW1 18
8 MODE
E6
1
7 RT
C13
220UF
16V
SANYO
16CV220KX
C10
0.1UF
1
MODE
MODE
C8
0.22UF 10V
OPT
2
R8
49.9K
R9
10K
E3
R7
42.2K
C12
22UF
16V
1210
E5 VIN
2.7V-10V
1
R6
127K
CCM
C
ISVIN 22
GND
E2
2 VC
4 VSENSE
C5
OPT
CCM
R4
31.6K
DO1813P-332HCB
6
C4
470PF
VCC 23
D1
CMDSH-3-LTC
2
1
5
R5
215K
3 FB
VIN
L2
3.3UH
3
R2
10K
VIN 24
8
C2
220PF
C3
10PF
1 RUN/SS
2
C1
2200PF
R1
215K
CUTTABLE TRACE
C6
0.1UF
U1
LTC3785EUF
1
R3
127K
D
0603
R12
OPT
7
E1
1
VCC
6
D
NOTES: UNLESS OTHERWISE SPECIFIED
A
1. ALL RESISTORS ARE IN OHMS, 0402.
ALL CAPACITORS ARE 0402.
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
CIRUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
CONTRACT NO.
APPROVALS
DRAWN:
TITLE: SCHEMATIC
CHECKED:
APPROVED:
ENGINEER: DAVID B.
DESIGNER:
4
3
10W BUCK-BOOST SYNCHRONOUS CONVERTER
SIZE
A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
TECHNOLOGY
KIM T.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
DATE:
2
DWG NO.
DC957A-1 * LTC3785EUF
Monday, September 17, 2007
SHEET
1
REV
A-1
1 OF 1
A
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