DC1157A - Schematic

1
2
3
4
5
6
7
8
3
FB1
VIN1
TP3
+ C1
33uF
35V
GND
TP8
R10
24.9K
L1
6.8uH
IHLP-2525CZ-ER-6R8
C18
100pF
D1
DFLS230L
C20
0.1uF
C24
10uF
6.3V
C16
100uF
6.3V
PG1
TP13
PG2
C
L2
4.7uH
IHLP-2525CZ-ER-4R7
PG2
TP14
VOUT2
D5
CMDSH-3
(Opt.)
R8
100K
D2
DFLS230L
SW1
SS1/TRACK1
4
VOUT1
5
exposed pad
solder side
VC1
PG1
RT/SYNC
16
PG2
SHDN
14
IND2
VC2
13
SW2
SS2/TRACK2
10
VIN2
BST2
C15
220pF
R12
61.9K
FOR 500kHz
B
SHDN
TP6
C17
22pF
R13
31.6K
12
C19
330pF
11
SS2
SS2
D4
CMDSH-3
C21
0.1uF
TP2
C25
10uF
6.3V
C23
100uF
6.3V
GND
C22
470pF
C
R18
(Opt.)
FB2
R15
10.0K
TP10
TP7
C13
0.47uF
VOUT2
1.8V/2A
TP5
15
FB2
9
SYNC
R22
(Opt.)
18
17
VOUT2
R9
84.5K
19
FB1
8
C14
22pF
20
21
R7
100K
BST1
IND1
7
TP9
VIN1
3
6
GND
PG1
TP4
U1
LT3510EFE
VOUT1
TP1
SS1
D3
CMDSH-3
2
VOUT1
VIN2
SS1
1
3.3V/2A
A
Combined
C12
0.47uF
R14
8.06K
B
Independent
2
C3
2.2uF
X7R
50V
GND
VIN1
4.5V-24V
1
A
JP1
VIN
VOUT1
R19
(Opt.)
R17
8.06K
OPTIONAL
ABSOLUTE TRACKING
VIN2
VIN2
4.5V-24V
TP11
+ C2
33uF
35V
C4
2.2uF
X7R
50V
LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY
GND
TP12
1
2
LINEAR TECHNOLOGY CORPORATION
Customer Notice
D
3
4
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
D
1630 McCARTHY BLVD.
MILPITAS, CA. 95035
PHONE (408) 954-8400 FAX (408) 434-0507
Title
Dual Monolithic Step-Down DC/DC Converter
6
Size
Document Number
Date:
Friday, September 08, 2006
Rev
Demo Circuit 1157A LT3510EFE
7
Sheet
1
of
8
A
1
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