Micrel, Inc.
Typical Characteristics
MIC2292/93C
MIC2292C 3 Series LED
MIC2293C 3 Series LED
MIC2292C 6 Series
86
Efficiency
86
Efficiency
83
V
LED Efficiency
= 4 . 2 V
81
76
71
66
61
56
V
I N
V
= 3 . 6 V
I N
= 4 . 2 V
V
I N
= 3 . 0 V
81
76
71
66
61
56
V
I N
V
= 3 . 6 V
I N
= 4 . 2 V
V
I N
= 3 . 0 V
78
73
68
63
I N
V
I N
V
= 3 . 6 V
= 3 . 0 V
I N
51
46
41
L = 1 0 μ H
C = 1 μ F
O U T
51
46
41
L = 1 0 μ H
C = 1 μ F
O U T
58
53
L = 1 0 μ H
C = 1 μ F
O U T
0 2 4 6 8 10 12 14 16 18 20
0 2 4 6 8 10 12 14 16 18 20
0 2 4 6 8 10 12 14 16 18 20
36
I LED (mA)
36
I LED (mA)
48
I LED (mA)
V
= 4 . 2 V
83
MIC2293C 6 Series
LED Efficiency
I N
100
99
Feedback Voltage
vs. Input Voltage
5
Shutdown Voltage
vs. Input Voltage
78
73
68
V
I N
V
= 3 . 6 V
= 3 . 0 V
I N
98
97
96
95
4
3
63
94
2
58
53
L = 1 0 μ H
C = 1 μ F
O U T
93
92
91
1
0 2 4 6 8 10 12 14 16 18 20
48
90
02468
10
12
0
02468
10
12
I OUT (mA)
V IN (V)
V IN (V)
5
Quiescent Current
vs. Input Current
1.4
Switch Frequency
vs. Temperature
50
EN Pin Bias Current
vs. Temperature
4
1.2
45
40
-40 -20 02 04 06 08 0 100
15 EN
I
= 3.6V
5 I = 3.0V
0
3
2
1
0
02468
V IN (V)
10
12
1.0
0.8
0.6
0.4
0.2
0
TEMPERATURE (°C)
35
I = 10V
30 EN
25
20
I = 4.2V
EN
10
EN
-50 05 0
TEMPERATURE (°C)
100
700
Schottky Forward
Voltage Drop
2.5
Schottky Reverse
Leakage Current
550
Saturation Voltage
vs. Temperature
600
500
2
500
400
300
200
1.5
1
V R = 25V
V R = 16V
450
400
30
-40
100
0
SCHOTTKY FORWARD VOLTAGE DROP (mV)
0.5
0
40
V R = 10V
50 60 70 80 90 100
TEMPERATURE (°C)
350
300
I SW = 500mA
04 08 0
TEMPERATURE (°C)
120
September 2009
4
M9999-091509-A
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