5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
DIM*
VIN
ON
3V-4.2V
LUMILEDS
SHDN/SS
*MODE/SYNC
OPTION
GND
4.1uH
*SEE QUICK START GUIDE.
OFF
PROD2 03/23/04
REVISION HISTORY
DESCRIPTION DATE APPROVEDECO REV
Customer Notice:
Linear Technology has made a best effort to
design a circuit that meets customer-supplied specifications;
however, it remains the customers 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
Applications Engineering for assistance.
This circuit is proprietary to Linear Technology and supplied
for use with Linear Technology parts.
2
DC773A
Monday, April 26, 2004
1
1
SCH, LTC3441EDE, SYNCHRONOUS 1MHz
MEI
03/23/04
773A-2.DSN
LUXEON III WHITE LED DRIVER
SIZE
SCALE:
CAGE CODE
DWG NO
REV
SHEET
OF
FILENAME:
TITLE
CONTRACT NO.
APPROVALS
DATE
DRAWN
CHECKED
APPROVED
ENGINEER
DESIGNER
TECHNOLOGY
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
VIN
VIN
R4
OPT
RFB2 324k
1%
R1
51k
D1
LXHL-PW09
21
SW1
LED ON
R3 0.033
1%
E4
R5
OPT
E1
U1
LTC3441EDE
1
2
7
8
6
3
54
9
10
11
12
SHDN/SS
GND
MODE/SYNC
VOUT
PGND
PGND
SW2SW1
PVIN
VIN
VC
FB
L1
SUMIDA CDRH5D18-4R1
E5
-
+
U2
LTC2050IS5
3
4
1
52
R2 100k
1%
D2
PMEG2010EA
12
C2
10nF
E3
D3
PMEG2010EA
12
RFB1 10.0k
1%
C1
10uF
6.3V
C3
22uF
6.3V
E2
