DC1312A - Schematic

5
4
3
2
1
D
D
WDI
W/T
E3
9 WDI
E4
8 W/T
R8 0
WDE
7 WDE
E5
C
JP2
WDE
2
U1
2
C3
10nF
3
W
3
ON
T
W/T
JP1
C4
10nF
SYNC
SW 3
L1 10uH
VOUT
C5
22uF
6.3V
D1
DFLS140-7
WDO 11
15 SYNC
(800KHz)
B
C2
0.22uF
E7
R5
R2
R3
100K 100K 432K
E8
C6
10pF
RST 10
R4
FB 6
VOUT
3.3V / 700mA
C
DA 4
OUT 16
14 Rt
R1
16.9K
BST 1
LT3689EUD
13 Cpor
1
1
(OPT)
12 Cwdt
VOUT
OFF
95.3K
EN/UVLO 5
E2
R7
17 GND
GND
C1
2.2uF
50V
R6
VIN 2
VIN
E1
4.5V - 36V
Transient to 60V
E9
GND
RESET
137K
E6
E10
WDO
B
R9
100K
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.
A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
CONTRACT NO.
APPROVALS
DRAWN
HELEN
DATE
8/7/09
TECHNOLOGY
TITLE
LT3689EUD Monolithic 700mA Step - Down Regulator
with Power - On Reset and Watchdog Timer
CHECKED
APPROVED
ENGINEER
Walker Bai
8/7/09
DESIGNER
Friday, August 14, 2009
3
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
SIZE
CAGE CODE
SCALE:
DWG NO
FILENAME:
2
REV
A
DC1312A
SHEET
1
1
OF
1
A
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