DC471A - Schematic

VIN
7.5V-60V
E1
D3
MMSD914T1
2
1
VIN
+ C7
OPT
E2
GND
SHDN
E3
SYNC
3
3
15
SYNC
14
4
1
BOOST
SHDN
SW
SYNC
SW
U1
BIAS
LT3430EFE
NC
NC
GND
8
GND
FB
GND GND
9
D2
MMSD914T1
1
2
D4
SMAZ7V5
2
1
SOD123
OPT
C4
0.68uF
16V
6
VIN VIN
7
13
C
BOOST
OPT
C3
4.7uF
100V
SHDN
E4
2
2
1
D
L1
33uH
1
SW
E5
VOUT
2
UP3B-330
1
D
4
5
C9
OPT
D1
30BQ060
SMC
10
R2
15.4k
1%
12 FB
R4
OPT
VOUT
[email protected]
C6
OPT
0805
C5
2
5
+ 100uF
C
10V
7343
C8
OPT
E6
GND
VC
16
11
VC
3
C1
220pF
C2
0.022uF
R6
OPT
1
2
R1
3.3k
R3
4.99k
1%
Q1
MMBT2222A
OPT
R5
OPT
B
B
NOTE: UNLESS OTHERWISE SPECIFIED
A
CONTRACT NO.
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
2. FOR ALL OPTIONAL COMPONENTS ON BOARDS:
Q1, R5, R6, C9: SHOW OUTLINE AND REFERENCE DESIGNATORS.
D3, D4: NO OUTLINE, SHOW REFERENCE DESIGNATORS.
C6, C7, C8, R4: NO OUTLINE, NO REFERENCE DESIGNATORS.
APPROVALS
DRAWN:
CHECKED:
APPROVED:
ENGINEER: KEITH S.
DESIGNER:
TECHNOLOGY
KIM T.
TITLE: SCHEMATIC
4
3
A
2A, 200KHz HIGH VOLTAGE BUCK CONVERTER
SIZE
DWG NO.
A
DATE:
5
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
Wednesday, July 10, 2002
2
REV
DC471A-1 * LT3430EFE
SHEET 1
1
A
OF
1
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