LTC3454 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC3454' PDF : 12 Pages View PDF
LTC3454
TYPICAL APPLICATION
500mA LED Flashlight Driver
L1
4.7μH
3-CELL
ALKALINE
4.5V
2.2μF
VIN SW1
SWA
SW2 VOUT
SWD
EN1
SWB
SWC
4.7μF
LED
LED
EN2
ILED = 500mA
0.1μF
VC
1MHz
BUCK-BOOST
LED: LUMILEDS, LXCL LW3C
L1: TOKO A997AS-4R7M
LTC3454
GND (EXPOSED PAD)
ISET1
ISET2
RISET1
6.19k
1%
3453 TA02
LED Power Efficiency vs VIN
100
95
90
85
80
75
70
ILED = 500mA
65 TA = 25°C
EFFICIENCY = (VOUT – VLED)ILED/VINIIN
60
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
VIN (V)
3454 TA02b
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COMMENTS
VIN: 1.6V to 18V, VOUT(MAX) = 34V, IQ = 1.8mA, ISD < 1μA,
MS10 Package/EDD Package
VIN: 2.6V to 16V, VOUT(MAX) = 34V, IQ = 4.2mA/5.5mA, ISD < 1μA,
ThinSOT Package
VIN: 1V to 10V, VOUT(MAX) = 34V, IQ = 1.2mA, ISD < 1μA,
ThinSOT Package
VIN: 2.5V to 10V, VOUT(MAX) = 34V, IQ = 1.9mA, ISD < 1μA,
ThinSOT Package/SC70 Package
VIN: 2.8V to 4.5V, VOUT(MAX) = 6V, IQ = 50μA, ISD < 1μA,
QFN-24 Package
VIN: 2.9V to 4.4V, VOUT(MAX) = 5.5V, IQ = 300μA, ISD < 2.5μA,
DFN Package
VIN: 2.9V to 4.4V, VOUT(MAX) = 5.5V, IQ = 300μA, ISD < 2.5μA,
DFN Package
VIN: 2.4V to 5.5V, VOUT(MAX) = 5.25V, IQ = 25μA/50μA, ISD <1 μA,
MS-10 Package/DFN Package
VIN: 2.4V to 5.5V, VOUT(MAX) = 5.25V, IQ = 28μA, ISD < 1μA,
DFN Package
VIN: 1V to 3.2V, VOUT(MAX) = 4V, IQ = 20μA, ISD = 20μA,
DFN Package
VIN: 2.7V to 5.5V, Up to 500mA Continuous Output Current,
QFN-16 Package
VIN: 2.7V to 16V, VOUT(MAX) = 34V, IQ = 1.9mA, ISD < 1μA,
ThinSOT Package
VIN: 2.7V to 24V, VOUT(MAX) = 40V, IQ = 5mA, ISD < 16μA,
DFN Package
VIN: 2.5V to 24V, VOUT(MAX) = 40V, IQ = 6.5mA, ISD < 1μA,
DFN Package/TSOPP Package
12 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
3454fa
LT 0309 REV A • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2005
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