LT3518
TYPICAL APPLICATION
Efficiency
5.5V SEPIC Converter with Short-Circuit Protection
100
90
C5
10μF
L1
2.4μH
R
SENSE
0.15Ω
D1
V
OUT
V
IN
3V
5.5V
500mA
80
70
60
50
40
30
C2
10μF
C2
R1
L2
2.2μF
221k
2.4μH
V
PWM
SW
FB
IN
CTRL
SYNC
SHDN
TGEN
TG
ISP
ISN
SHDN
LT3518
V
R
T
REF
R2
49.9k
V
GND
SS
C
0
100
200
I
300
(mA)
400
500
R3
10k
C4
10nF
R
T
C3
0.1μF
LOAD
6.04k
2MHz
3518 TA07b
3518 TA07a
C1: KEMET C0805C225K4RAC
C2, C5: KEMET C1206C106K4RAC
C3: MURATA GRM21BR71H104KA01B
C4: MURATA GCM033R71A103KA03
D1: ZETEX ZLLS2000TA
L1, L2: TOKO 962BS-2R4M
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
V : 5V to 18V, V
LT1618
Constant Current, 1.4MHz, 1.5A Boost Converter
= 36V, Dimming = Analog/PWM, I < 1μA,
OUT(MAX) SD
IN
MSOP10 Package
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V : 3V to 48V, Dimming = 3000:1 True Color PWM, I < 5μA,
IN
SD
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LT3474
36V, 1A (I ), 2MHz, Step-Down LED Driver
V : 4V to 36V, V
SD
= 13.5V, Dimming = 400:1 True Color PWM,
LED
IN
OUT(MAX)
I
< 1μA, TSSOP16E Package
LT3475
Dual 1.5A (I ), 36V 2MHz Step-Down LED Driver
V : 4V to 36V, V
SD
= 13.5V, Dimming = 3000:1 True Color PWM,
LED
IN
OUT(MAX)
I
< 1μA, TSSOP20E Package
LT3476
Quad Output 1.5A, 36V, 2MHz High Current LED Driver
with 1,000:1 Dimming
V : 2.8V to 16V, V
SD
= 36V, Dimming = 1000:1 True Color PWM,
IN
OUT(MAX)
I
< 10μA, 5mm × 7mm QFN Package
LT3477
3A, 42V, 3MHz Boost, Buck-Boost, Buck LED Driver
V : 2.5V to 25V, V
= 40V, Dimming = Analog/PWM, I < 1μA,
IN
OUT(MAX)
SD
QFN, TSSOP20E Packages
LT3478/LT3478-1
LT3479
4.5A, 42V, 2.5MHz High Current LED Driver with 3,000:1 V : 2.8V to 36V, V
= 42V, Dimming = 3000:1 True Color PWM,
IN
OUT(MAX)
Dimming
I
< 3μA, TSSOP16E Packages
SD
3A, Full Featured DC/DC Converter with Soft-Start and
Inrush Current Protection
V : 2.5V to 24V, V
= 40V, I = 6.5mA, I < 1μA,
IN
OUT(MAX) Q SD
DFN and TSSOP Packages
V : 2.5V to 24V, V = 36V, Dimming = 1000:1 True Color PWM,
OUT(MAX)
LT3486
Dual 1.3A, 2MHz High Current LED Driver
IN
SD
I
< 1μA, 5mm × 3mm DFN, TSSOP16E
LT3496
Triple Output LED Driver
V : 3V to 40V, V
SD
= 45V, Dimming = 3000:1 True Color PWM,
IN
OUT(MAX)
I
< 10μA, 4mm × 5mm QFN Package
LT3517
Full-Featured LED Driver with 1.5A Switch Current
48V Buck Mode 50mA LED Driver
16 Channel Buck LED Driver Mode
High Current LED Controller
V : 3V to 40V, V
SD
= 45V, Dimming = 5000:1 True Color PWM,
IN
OUT(MAX)
I
< 1μA, 4mm × 4mm QFN and TSSOP Packages
LT3590
V : 4.5V to 55V, Drives Up to 10 LEDs, 200:1 Dimming,
IN
I
SO
= 15mA, 2mm × 2mm DFN SC70
LT3595
V : 4.5V to 45V, Drives Up to 160 LEDs, 5000:1 Dimming,
IN
5mm × 9mm QFN
LTC®3783
V : 3V to 36V, V
SD
= Ext FET, Dimming = 3000:1 True Color PWM,
IN
OUT(MAX)
I
< 20μA, 5mm × 4mm QFN10, TSSOP16E Packages
3518fb
LT 0308 REV B • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
20
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© LINEAR TECHNOLOGY CORPORATION 2007
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
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