DC1232A - Schematic

5
4
3
2
1
D
D
SYNC
E4
SYNC OR BURST
JP1
3
2
1
R2
24k
VOUT
C1
1500pF
15
SHDN
14
SYNC
11
C2
330pF
VC
E2
CSS 9
BOOST 6
SW 21
NC 5
NC
C4
0.1uF L1
0603 100uH
VOUT
R5
24k
D2
B1100
E5
+
C5
27pF
NC
NC
NC
CIN
2.2uF
100V
1812
SHDN
BURST DEFEAT
GND
C7
OPT
6032
GND
SYNC
+
VIN
NC
D1
1N4448HWT
1
2
R3
165k
1%
C6
100uF
6.3V
6032
100mOHMS
VOUT
[email protected]
C
E6
GND
FB 12
R4
100k
1%
7
13
16
C
R1
200k
0603
4
3
17
SHDN
E3
VIN
8
*
E1
VIN
3.7V - 60V
U1
LT3437IFE
GND
*
80V TRANSIENTS
SEE QUICK START GUIDE
BIAS 10
C3
0.1uF 0603
B
B
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0402.
ALL CAPACITORS ARE IN MICROFARADS, 0402.
A
CUSTOMER NOTICE
CONTRACT NO.
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
APPROVALS
DRAWN:
CHECKED:
APPROVED:
ENGINEER: KEITH S.
DESIGNER:
TECHNOLOGY
KIM T.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
A
HIGH VOLTAGE 500mA 200kHz BUCK CONVERTER WITH BURST MODE
SIZE
A
DATE:
DWG NO.
DC1232A * LT3437IFE
Monday, April 30, 2007
2
SHEET
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A
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