LTC3202 Datasheet, PDF (12/12 Pages) Linear Technology – Low Noise, High Efficiency Charge Pump for White LEDs

LTC3202
TYPICAL APPLICATIO
LED Driver with Linear Brightness Control
OFF ON
V_IN
3V TO 4.5V
C1
1µF
C2
C3
1µF
1µF
V_C = 0V TO 3V
8 79 6
C1⁺ C1^– C2⁺ C2^–
10 _D0
3
V_OUT
1 _{D1 LTC3202}
4 _VIN
GND
5, 11
2
FB
R2
3.9k
R1
1k
C4
1µF
( ) I_LED =
1 + ^R1
R2
0.6V
36Ω
–
R1
R2
• ^VC
36Ω
36Ω 36Ω 36Ω 36Ω 36Ω 36Ω
3202 TA02
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PART NUMBER
DESCRIPTION
COMMENTS
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Up to 88% Efficiency, V_IN: 3.1V to 5.5V, V_OUT: 1.5V, I_Q: 35µA,
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12 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^q FAX: [phone] ^q www.linear.com
3202fa
LT/TP 0803 1K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2001