Micrel, Inc.
Typical Characteristics
MIC2289C
100
Feedback Voltage
vs. Input Voltage
5
Shutdown Voltage
vs. Input Voltage
5
Quiescent Current
vs. Input Current
99
98
97
96
95
94
93
92
91
4
3
2
1
4
3
2
1
90
0
2
4
6
8
10
12
0
0
2
4
6
8
10
12
0
0
2
4
6
8
10
12
V IN (V)
V IN (V)
V IN (V)
1.4
Switch Frequency
vs. Temperature
50
EN Pin Bias Current
vs. Temperature
700
Schottky Forward
Voltage Drop
-40 -20 0 20 40 60 80 100
15 E N
I
= 3.6V
5 I = 3.0V
0
1.2
1.0
0.8
0.6
0.4
0.2
0
TEMPERATURE (°C)
45
40
35
I = 10V
30 E N
25
20
I = 4.2V
EN
10
EN
-50 0 50
TEMPERATURE (°C)
100
600
500
400
300
200
100
0
SCHOTTKY FORWARD VOLTAGE DROP (mV)
2.5
Schottky Reverse
Leakage Current
550
Saturation Voltage
vs. Temperature
900
Current Limit
vs. Temperature
2
500
850
1.5
V R = 25V
450
800
750
1
V R = 16V
400
700
30
-40
-40 0 40 80
0.5
0
40
V R = 10V
50 60 70 80 90 100
TEMPERATURE (°C)
350
300
I S W = 500mA
0 40 80
TEMPERATURE (°C)
120
650
600
V IN = 2.5V
TEMPERATURE (°C)
120
Switch Saturation Voltage
600
500
400
300
200
100
vs. Current
V IN = 2.5V
V IN = 5V
0
August 2007
0
100
200 300
I SW (mA)
4
400
500
M9999-081507-B
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