LTC3202
TYPICAL APPLICATIO
LED Driver with Linear Brightness Control
C2
1 μ F
C3
1 μ F
V C = 0V TO 3V
C1
C2
C2
)
OFF ON
10
C1
D0
8
+
7
9
+
6
V OUT
3
R2
3.9k
I LED = ( 1 +
R1 0.6V
R2 36 ?
R1
– ?
R2
V C
36 ?
1
D1
LTC3202
R1
V IN
3V TO 4.5V
4
V IN
FB
2
1k
C1
1 μ F
GND
5, 11
C4
1 μ F
36 ?
36 ?
36 ?
36 ?
36 ?
36 ?
3202 TA02
RELATED PARTS
PART NUMBER
LT1618
LT1932
LT1937
LTC3200
LTC3200-5
DESCRIPTION
Constant Current, Constant Voltage 1.4MHz, High Efficiency
Boost Regulator
Constant Current, 1.2MHz, High Efficiency White LED Boost
Regulator
Constant Current, 1.2MHz, High Efficiency White LED Boost
Regulator
Low Noise, 2MHz, Regulator Charge Pump White LED Driver
Low Noise, 2MHz, Regulator Charge Pump White LED Driver
COMMENTS
Up to 16 White LEDs, V IN : 1.6V to 18V, V OUT(MAX) : 34V,
I Q : 1.8mA, I SD : <1 μ A, 10-Lead MS
Up to 8 White LEDs, V IN : 1V to 10V, V OUT(MAX) : 34V, I Q : 1.2mA,
I SD : <1 μ A, ThinSOT TM
Up to 4 White LEDs, V IN : 2.5V to 10V, V OUT(MAX) : 34V, I Q : 1.9mA,
I SD : <1 μ A, ThinSOT, SC70
Up to 6 White LEDs, V IN : 2.7V to 4.5V, I Q : 8mA, I SD : <1 μ A,
10-Lead MS
Up to 6 White LEDs, V IN : 2.7V to 4.5V, I Q : 8mA, I SD : <1 μ A,
ThinSOT
LTC3201
Low Noise, 1.7MHz, Regulator Charge Pump White LED Driver Up to 6 White LEDs, V IN : 2.7V to 4.5V, I Q : 6.5mA, I SD : <1 μ A,
10-Lead MS
LTC3250-1.5
250mA, 1.5MHz, High Efficiency Step-Down Charge Pump
Up to 88% Efficiency, V IN : 3.1V to 5.5V, V OUT : 1.5V, I Q : 35 μ A,
I SD : <1 μ A, ThinSOT
LTC3251/LTC3251-1.5 500mA, Spread Spectrum, High Efficiency Step-Down
Charge Pump
Up to 88% Efficiency, V IN : 2.7V to 5.5V, V OUT : 0.9V to 1.6V/1.5V,
I Q : 8 μ A, I SD : <1 μ A, 10-Lead MS
LTC3252
LT3465/LT3465A
Dual, 250mA/Channel, Spread Spectrum, High Efficiency
Step-Down Charge Pump
Constant Current, 1.2MHz/2.7MHz, High Efficiency White
LED Boost Regulator with Integrated Schottky Diode
Up to 88% Efficiency, V IN : 2.7V to 5.5V, V OUT : 0.9V to 1.6V,
I Q : 60 μ A, I SD : <1 μ A, DFN12
Up to 6 White LEDs, V IN : 2.7V to 16V, V OUT(MAX) : 30V, I Q : 2mA,
I SD : <1 μ A, ThinSOT
ThinSOT is a trademark of Linear Technology Corporation.
3202fa
(408) 432-1900 q FAX: (408) 434-0507 www.linear.com
12
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
q
LT/TP 0803 1K ? PRINTED IN USA
? LINEAR TECHNOLOGY CORPORATION 2001
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