DC1091A - Schematic

5
4
3
2
1
SUMIDA
CDR7D43MNNP-100NC
L1
10UH
D
D
U1
LT3480EMSE
4
+ C2
C3
2.2UF,50V
1206
22UF,50V
E2
SANYO
50CE22BS
RUN
SHDN
EXTSS
EXTSS
2
JP1
5
BD
BOOST
R2
110K
FB 8
PGOOD 7
SW
VIN
RUN/SS
R1
60.4K
RT 10
VC 9
R3
590K
SYNC 6
1
2
3
4
FIXED FREQ
BURST MODE
SYNC
C5
0.1UF,50V
0603
E6
E7
VOUT
[email protected]
C
GND
PGOOD
C6
680PF
R6
100K
C7
0.1UF,50V
0603
C4
22UF,10V
1206
R5
20K
C8
100PF
E4
E5
R4
100K
11
C
1
3
E1
VIN
6.3V - 38V
GND
C1
0.47UF
GND
D1
DFLS240L
2
1
JP2
4
3
2
1
E3
SYNC
B
B
CUSTOMER NOTICE
NOTES: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0402.
ALL CAPACITORS ARE IN MICROFARADS, 0402.
A
2. INSTALL SHUNT ON JP1 PINS 1&2.
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
4
3
APPROVALS
DRAWN:
TECHNOLOGY
KIM T.
CHECKED:
TITLE:
SCHEMATIC
SIZE
DWG NO.
APPROVED:
ENGINEER: KEVIN H.
DESIGNER:
A
DATE:
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
A
2A, 38V STEP-DOWN SWITCHING REGULATOR
WITH SYNC FUNCTION
DC1091A-1 * LT3480EMSE
Tuesday, February 13, 2007
2
SHEET
1
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A-1
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