DC1060A - Schematic

5
R1
51k
C2
10uF,6.3V
0805
E6
3
C3
0.22uF
16V
L1
6.2uH
SUMIDA
CDRH5D28
C
2
C6
1000pF
D3
B240A
R4
20k
2
C19
OPT
C8
1500pF
CFF
OPT
16
1
15
14
13
5
4
BOOST2
BOOST1
SW1
SW2
FB1
FB2
TRACK/SS2
TRACK/SS1
VC1
VC2
PG1
PG2
D2
1N4448W
1
2
7
6
9
8
10
C7
1000pF
11
R5
43k
RT/SYNC
R2
52.3k
1%
700kHz
R9
100k
PG1
E8
A
C9
330pF
GND
C
R6
56.2k
R10
100k
E9
R7
11.5k
1%
PG2
E10
GND
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
SUMIDA
CDRH6D28
R8
10.7k
1%
NOTES: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0402.
ALL CAPACITORS ARE 0402.
C5
10uF,10V
1206
E7
OUT2
[email protected]
D4
B240A
C20
OPT
R3
35.7k
B
E5
C4
0.22uF
L2
16V
10uH
1
OUT1
[email protected]
E22
TRACK/SS2
2
D1
1N4448W
2
1
U1
LT3508EFE
VIN2
E21
E4
GND
D
E3
VIN1
TRACK/SS1
1
C1
10uF,50V
1210
GND
SHDN
E2
17
GND
2
E1
SHDN 12
D
3
1
VIN
6V - 36V
4
4
3
APPROVALS
DRAWN:
CHECKED:
APPROVED:
ENGINEER: KEITH S.
DESIGNER:
TECHNOLOGY
KIM T.
B
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
A
DUAL MONOLITHIC 1.4A STEP-DOWN SWITCHING REGULATOR
SIZE
DWG NO.
A
DC1060A-1 * LT3508EFE
Monday, January 15, 2007
DATE:
2
SHEET
1
REV
A-1
1 OF 2
5
C10
4.7uF,25V
1206
R12
51k
C14
1000pF
23
22
R15
9.1k
R14
12.4k 1%
C17
1200pF
R18
10k
1%
FB1
FB2
TRACK/SS2
TRACK/SS1
VC1
VC2
PG1
PG2
11
C13
0.1uF
16V
18
17
1
VIN2
9
SW2
12
19
C15
1000pF
20
RT/SYNC
R13
16.9k
1%
1.6MHz
2
D8
DFLS130
24
SW1
D7
1N4448W
1
2
C18
680pF
L4
4.7uH
E16
OUT2
[email protected]
SUMIDA
CDRH4D18C
C
C16
10uF,6.3V
0805
E17
GND
D9
DFLS130
R16
11k
GND
GND
GND
GND
E15
2
1
C11
22uF,6.3V
0805
SUMIDA
CDRH3D18
1
GND
GND
L3
3.0uH
E14
8
C12
0.1uF
16V
BOOST2
BOOST1
E18
TRACK/SS2
U2
LT3508EUF
13
14
15
16
1
7
VIN1
D6
1N4448W
10
E23
2
C
OUT1
[email protected]
D
E13
2
TRACK/SS1
E12
25
SHDN
1
E11
SHDN 21
GND
2
GND
GND
GND
GND
*
3
3
4
5
6
D
VIN
5V - 16V
4
R17
35.7k 1%
R19
11.5k
1%
R21
100k
E19
PG2
B
B
E20
GND
* SEE QUICK-START GUIDE
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.
A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
APPROVALS
DRAWN:
TECHNOLOGY
KIM T.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
CHECKED:
TITLE: SCHEMATIC
APPROVED:
DUAL MONOLITHIC 1A QFN STEP-DOWN SWITCHING REGULATOR
ENGINEER: KEITH S.
DESIGNER:
SIZE
DWG NO.
A
A
DC1060A-1 * LT3508EUF
Monday, January 15, 2007
DATE:
2
SHEET
1
REV
A-1
2 OF 2
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