DC1359A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
__
DESCRIPTION
3
APPROVED
JAINO P.
PRODUCTION
DATE
5-19-10
D
D
27
E4 VOUT1
R2
21
11
E9
E10
C7
C8
1500pF 1500pF
B
1
20
RST2
SYNC
VOUT1
E2
E3
VOUT1
3.3V @ 0.8A
GND
24
25
L2 1.0uH
6
C4
22uF
6.3V
1206
R3
49.9K
1
5
R5
49.9K
28
4
R7
49.9K
C5
1000pF
E5
VOUT2
1.2V @ 1A
E7
GND
E8
SYNC
C
C6
1000pF
GND
CWDT
3
RST1
GND
8
R1
80.6K
18
R10
100K
17
100K
SS2
16
R8
WDE
WDE
GND
9
GND
100K
15
VOUT1R6
SS1
GND
1
ON
JP1
2
FB2
WDO
23
10
FB1
26
100K
SW2
WDI
GND
R4
E15
OFF
RST2
VIN2
RT
E13
13
RST1
PGOOD
29
GND
DA
CPOR
WDO
EN2
E12
E6
C3
22uF
6.3V
1206
D2
100K
14
19
U1
7
WDI
L1 3.3uH
SW1
LT3640EFE
12
C
EN/UVLO
2
2
R13
(OPT)
1
BST
3
2
PGOOD
SW
VIN
E11
R11
100K
RUN
C2
2.2uF
50V
1206
R12
301K
VOUT1
GND
D1
C1 0.1uF
10V
VIN
22
VIN
E1
5V - 35V
TRANSIENT TO 55V
R9
32.4K
B
OPTIONAL COMPONENTS
L3
LPS4018-332ML
FB1
VEMI
GND
E14
VIN
OPT
C10
(OPT)
0603
+ C9
22uF
63V
OPT
C11
(OPT)
1210
E16
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN 0402.
ALL CAPACITORS ARE IN 0402.
A
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.
2. INSTALL SHUNTS AS SHOWN.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
HZ
JAINO P.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
DUAL MONOLITHIC STEP-DOWN SWITCHING REGULATOR WITH
POWER-ON RESET AND WATCH DOG TIMER
SIZE
N/A
SCALE = NONE
2
DATE:
IC NO.
REV.
LT3640EFE
DEMO CIRCUIT 1359A
Monday, July 19, 2010
SHEET 1
1
3
OF 1
A
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