LT3497
20
3497f
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2006
LT 1206 • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
2 Li-Ion to 8/8 White LEDs
Conversion Effi ciency
PART NUMBER DESCRIPTION COMMENTS
LT1937 Constant Current, 1.2MHz, High Effi ciency White LED
Boost Regulator
Up to 4 White LEDs, V
IN
: 2.5V to 10V, V
OUT(MAX)
= 34V,
I
Q
= 1.9mA, I
SD
< 1µA, ThinSOT
TM
/SC70 Packages
LTC3200-5 Low Noise, 2MHz Regulated Charge Pump White LED Driver Up to 6 White LEDs, V
IN
: 2.7V to 4.5V, I
Q
= 8mA, I
SD
< 1µA,
ThinSOT Package
LTC3201 Low Noise, 1.7MHz Regulated Charge Pump White LED Driver Up to 6 White LEDs, V
IN
: 2.7V to 4.5V, I
Q
= 6.5mA,
I
SD
< 1µA, MS Package
LTC3202 Low Noise, 1.5MHz Regulated Charge Pump White LED Driver Up to 8 White LEDs, V
IN
: 2.7V to 4.5V, I
Q
= 5mA, I
SD
< 1µA,
MS Package
LTC3205 High Effi ciency, Multidisplay LED Controller Up to 4 (Main), 2 (Sub) and RGB, V
IN
: 2.8V to 4.5V,
I
Q
= 50µA, I
SD
< 1µA, 24-Lead QFN Package
LT3465/LT3465A Constant Current, 1.2MHz/2.7MHz, High Effi ciency White LED
Boost Regulator with Integrated Schottky Diode
Up to 6 White LEDs, V
IN
: 2.7V to 16V, V
OUT(MAX)
= 34V,
I
Q
= 1.9mA, I
SD
< 1µA, ThinSOT Package
LT3466/LT3466-1 Dual Full Function, 2MHz Diodes White LED Step-Up Converter
with Built-In Schottkys
Up to 20 White LEDs, V
IN
: 2.7V to 24V, V
OUT(MAX)
= 39V,
DFN, TSSOP-16 Packages
LT3486 Dual 1.3A White LED Converter with 1000:1 True Color PWM
Dimming
Drives Up to 16 100mA White LEDs. V
IN
: 2.5V to 24V,
V
OUT(MAX)
= 36V, DFN, TSSOP Packages
LT3491 White LED Driver in SC70 with Integrated Schottky Drives Up to 6 20mA White LEDs, V
IN
: 2.5V to 12V,
V
OUT(MAX)
= 27V, 8-Lead SC70 Package
ThinSOT is a trademark of Linear Technology Corporation.
SW1 V
IN
LT3497
GND
SW2
L2
15µH
R
SENSE2
10Ω
R
SENSE1
10Ω
C3
1µF
C2
1µF
3497 TA11a
C1
1µF
V
IN
6V TO 9V
L1
15µH
CAP1 CAP2
LED1 LED2
CTRL1
SHUTDOWN
AND DIMMING
CONTROL 1
SHUTDOWN
AND DIMMING
CONTROL 2
CTRL2
OFF ON
OFF ON
C1, C2: TAIYO YUDEN GMK212BJ105KG
C3: TAIYO YUDEN LMK212BJ105MG
L1, L2: MURATA LQH32CN150K53
LED CURRENT (mA)
0
70
75
85
15
3497 TA11b
65
60
510 20
55
50
80
EFFICIENCY (%)
V
IN
= 7.2V
8/8LEDs
