DC1423A - Schematic

1
L1
11 VIN
0
A
R5
APD IN 2
49.9
C4
0.1uF
100V
10 GND
GND
RT 9
7
R13
(OPT)
SYNC
16 MON
J1
1
13 VREF
MON
C8
(OPT)
R3
18.7K
FB 15
14 CTRL
R7
OPT
R2
1M
N/C 1
E3
R6
C3
10nF
100V
MON IN 3
12 SHDN
C9
0.22uF
3
CTRL
U1
LT3571EUD
2
SHDN
A
20
17 GND
JP1
OUTPUT
RUN
SW 5
SW 6
E2
1
GND
C1
0.1uF
100V
2
3
4
5
R4
20K
C2
1uF
16V
R1
10uH
COPPER
BUSSMANN
SD3110-100-R
VOUT 4
VIN
E1
8
VIN
5V - 12V
2
R8
12.1K
APD
50V @ 2mA
E4
GND
E7
SYNC
FAST MON RESPONSE CIRCUIT
E6
Q1
ZXTN25100DFH
R9
100K
VIN
R10
U2
B
R12
4.99K
1 OUT
C7
1uF
LOAD STEP CIRCUIT
3
E10
+IN 3
V-
MON
R11
4.99K
2 OUT
PWM
C6
0.1uF
B
2
C5
0.5pF
-IN 4
V+ 5
U3
LT1815CS5
E9
IN 1
LT1460KCS3-2.5
100
GND
MON
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
1
CONTRACT NO.
APPROVALS
DRAWN
DATE
HELEN
4/08/08
ENGINEER Jesus.R
4/08/08
TECHNOLOGY
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
TITLE
CHECKED
LT3571EUD, DC/DC Boost Converter for APD Bias
APPROVED
DESIGNER
Monday, March 02, 2009
SIZE
CAGE CODE
SCALE:
DWG NO
FILENAME:
2
REV
A
DC1423A
SHEET
1
OF
1
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