Datasheet

12
LTC3490
3490fa
© LINEAR TECHNOLOGY CORPORATION 2005
LT 0606 REV A • PRINTED IN THE USA
PART NUMBER DESCRIPTION COMMENTS
LT
®
1618 Constant Current, Constant Voltage 1.4MHz, V
IN
: 1.6V to 18V, V
OUT(MAX)
= 34V, I
Q
= 1.8mA, I
SD
< 1µA, MS/EDD
High Efficiency Boost Regulator Packages
LT1932 Constant Current, 1.2MHz, High Efficiency White V
IN
: 1V to 10V, V
OUT(MAX)
= 34V, I
Q
= 1.2mA, I
SD
< 1µA, ThinSOT Packages
LED Boost Regulator
LT1937 Constant Current, 1.2MHz, High Efficiency White V
IN
: 2.5V to 10V, V
OUT(MAX)
= 34V, I
Q
= 1.9mA, I
SD
< 1µA, ThinSOT
TM
/SC70
LED Boost Regulator Packages
LTC3205 High Efficiency, Multi-Display LED Controller V
IN
: 2.8V to 4.5V, V
OUT(MAX)
= 6V, I
Q
= 50µA, I
SD
< 1µA, QFN24 Package
LTC3216 1A Low Noise, High Current LED Charge Pump with V
IN
: 2.9V to 4.4V, V
OUT(MAX)
= 5.5V, I
Q
= 300µA, I
SD
< 2.5µA, DFN Package
Independent Flash/Torch Current Control
LTC3402 2A, 3MHz Micropower Synchronous Boost Converter V
IN
: 0.85V to 5V, V
OUT(MAX)
= 5V, I
Q
= < 38µA, I
SD
< 1µA,
MS/EDD Packages
LTC3453 500mA Synchronous Buck-Boost High Current LED V
IN
: 2.7V to 5.5V, V
OUT(MAX)
= 5.5V, I
Q
= 0.6mA, I
SD
< 6µA, QFN Package
Driver in QFN
LT3465/LT3465A Constant Current, 1.2MHz/2.7MHz, High Efficiency V
IN
: 2.7V to 16V, V
OUT(MAX)
= 34V, I
Q
= 1.9mA, I
SD
< 1µA, ThinSOT Package
White LED Boost Regulator with Integrated Schottky
Diode
LT3466 Dual Constant Current, 2MHz, High Efficiency V
IN
: 2.7V to 24V, V
OUT(MAX)
= 40V, I
Q
= 5mA, I
SD
< 16µA, DFN Package
White LED Boost Regulator with Integrated Schottky
Diode
LT3479 3A, Full-Featured DC/DC Converter with Soft-Start V
IN
: 2.5V to 24V, V
OUT(MAX)
= 40V, I
Q
= 6.5mA, I
SD
< 1µA, DFN/TSSOP
and Inrush Current Protection Packages
ThinSOT is a trademark of Linear Technology Corporation.
RELATED PARTS
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
FAX: (408) 434-0507
www.linear.com
LED Driver Drops to 20% Amplitude on Low-Battery Detect
+
SW
CAP
LED
1 NiMH OR
ALKALINE
CELL
4.7µF
LOBAT
3490 TA05
V
IN
CTRL/SHDN
CELLS
1M
LUMILEDS
LUXEON
LXHL-BWO2
GND
LTC3490
432k
1M
ON/OFF
3.3µH
350mA/70mA
TYPICAL APPLICATIO
U