MIC2290(2004) データシートの表示（PDF） - Micrel
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MIC2290 Datasheet PDF : 12 Pages
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MIC2290
Typical Characteristics
Efficiency at VOUT = 12V
90
85
VIN = 4.2V
80
75
70 VIN = 3.6V
65
60
VIN = 3.3V
55
50
0
25
50
75 100
OUTPUT CURRENT (mA)
Current Limit
vs. Supply Voltage
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
02.5 4 5.5 7 8.5 10
SUPPLY VOLTAGE (V)
700
600
500
400
300
200
100
00
Switch Saturation
vs. Current
VIN = 3.6V
100 200 300 400 500
SWITCH CURRENT (mA)
Maximum Duty Cycle
vs. Supply Voltage
100
98
96
94
92
90
88
86
84
82
80
2.5 4 5.5 7 8.5 10
SUPPLY VOLTAGE (V)
M9999-081104
12.1
12.08
12.06
12.04
12.02
12
11.98
11.96
11.94
11.92
11.9
0
Load Regulation
V
IN
=
3.6V
20
40
60
80
LOAD (mA)
Current Limit
vs. Temperature
1.0
0.8
0.6
0.4
0.2
0-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Switch Saturation Voltage
vs. Temperature
700
600
500
400
300
200
VIN = 3.6V
100
I = 500mA
SW
0-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
Maximum Duty Cycle
vs. Temperature
99
97
95
93
91
89
87
VIN = 3.6V
85-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
4
Micrel
Feedback Voltage
vs. Temperature
1.26
1.26
1.25
1.25
1.24
1.24
1.23
1.23
1.22-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
540
530
520
510
500
490
480
470
460
450
2.5
Switch Saturation
vs. Supply Voltage
ISW = 500mA
4 5.5 7 8.5 10
SUPPLY VOLTAGE (V)
Frequency
vs. Temperature
1.4
1.35
1.3
1.25
1.2
1.15
1.1
1.05
1-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
FB Pin Current
vs. Temperature
700
600
500
400
300
200
100
0-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
August 2004
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