MIC3287_10 Datasheet, PDF (4/9 Pages) Micrel Semiconductor – 1.2MHz PWM White LED Driver with OVP in Thin SOT-23 and 2mm x 2mm MFL

Micrel, Inc.
Typical Characteristics
3 Series
White LED Efficiency
85
80
VIN=3.6V
75 ^VIN^=3.2V
70
65
VIN=4.2V
60
55
50
L = 10µH
COUT = 0.22µF
45_{2 4 6 8 10 12 14 16 18 20}
WHITE LED CURRENT (mA)
Frequency
vs. Temperature
1.5
1.4
1.3 ^VIN=3.6V
VIN=4.2V
1.2
VIN=3.2V
1.1
1._-0_{40 -25 -10 5 20 35 50 65 80}
TEMPERATURE (°C)
0.003
Shutdown Current
vs. Input Voltage
0.002
0.0021.8 _{3.2 3.6 4.0 4.4 4.8 5.2 5.6}
INPUT VOLTAGE (V)
Current Limit
vs. Input Voltage
840
820
800
780
760
740
7220.8 _{3.2 3.6 4.0 4.4 4.8 5.2 5.6}
INPUT VOLTAGE (V)
April 2010
4 Series
White LED Efficiency
85
VIN=3.6V
80
75
VIN=3.2V
70
65
VIN=4.2V
60
55
50
L = 10µH
COUT = 0.22µF
45_{2 4 6 8 10 12 14 16 18 20}
WHITE LED CURRENT (mA)
Feedback Voltage
vs. Temperature
260
256
252
248
VIN=3.6V
244
24_-0_{40 -25 -10 5 20 35 50 65 80}
TEMPERATURE (°C)
Quiescent Current
vs. Input Voltage
2.5
2.4
2.3
2.2
2.1
2.20.8 _{3.2 3.6 4.0 4.4 4.8 5.2 5.6}
INPUT VOLTAGE (V)
MIC3287
Enable Pin Current
vs. Temperature
12
10
VEN=5V
8
6
VEN=3.3V
VEN=2.5V
4
VEN=1.8V
2
-⁰40 -25 -10 5 20 35 50 65 80
TEMPERATURE (°C)
Feedback Voltage
vs. Input Voltage
254
253
252
251
250
249
2428.8 _{3.2 3.6 4.0 4.4 4.8 5.2 5.6}
INPUT VOLTAGE (V)
Curremt Limit
vs. Temperature
900
850
800
VIN=3.6V
750
700
650
600_{-40 -25 -10 5 20 35 50 65 80}
TEMPERATURE (°C)
4
M9999-042910