MIC2287 Datasheet, PDF (4/10 Pages) Micrel Semiconductor – 1.2MHz PWM White LED Driver with OVP in 2mm × 2mm MLF™ and Thin SOT-23

MIC2287
Typical Characteristics
100
99
98
97
96
95
94
93
92
91
90
0
Feedback Voltage
vs. Input Voltage
2 4 6 8 10 12
V_IN (V)
3 Series LED Efficiency
84
82
80
78
76
74
72
70
0
V = 3.0V
IN
V = 3.6V
IN
V = 4.2V
IN
L = 10µH
C
OUT
=
0.22µF
5 10 15 20 25
I_OUT (mA)
EN Pin Bias Current
vs. Temperature
50
45
40
35
I = 10V
30 ^EN
25
20
15
I = 4.2V
EN
10
I = 3.6V
EN
5 _{I = 3.0V}
0 ^EN
-50
0
50
100
TEMPERATURE (°C)
M0510-081104
Shutdown Current
vs. Input Voltage
5
4
3
2
1
0
0 2 4 6 8 10 12
V_IN (V)
6 Series LED Efficiency
84
V = 4.2V
IN
82
80
V = 3.6V
IN
78
V = 3.0V
76
IN
74
72
70
0
L = 10µH
C
OUT
=
0.22µF
5 10 15 20 25
I_OUT (mA)
Saturation Voltage
vs. Temperature
550
500
450
400
350
300
-40
I_SW = 500mA
0
40
80 120
TEMPERATURE (°C)
Switch Saturation Voltage
vs. Current
600
500
400
V_IN = 2.5V
300
200
V_IN = 5V
100
0
0
100 200 300 400 500
I_SW (mA)
4
Micrel
Quiescent Current
vs. Input Voltage
5
4
3
2
1
0
0 2 4 6 8 10 12
V_IN (V)
Switch Frequency
vs. Temperature
1.4
1.2
1
0.8
0.6
0.4
0.2
0
-40 0
40
80 120
TEMPERATURE (°C)
Current Limit
vs. Temperature
900
850
800
750
700
650
V = 2.5V
600 ^IN
-40 0
40
80 120
TEMPERATURE (°C)
August 2004