MIC2245 Ver la hoja de datos (PDF) - Micrel
Número de pieza
componentes Descripción
Fabricante
MIC2245 Datasheet PDF : 14 Pages
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Micrel, Inc.
Typical Characteristics – PWM Mode
100
90
80
70
60
50
40
30
20
10
00
2.5VOUT Efficiency
VIN=3.2V
VIN=3.6V
VIN=4.2V
100 200 300 400 500
OUTPUT CURRENT (mA)
100
90
80
70
60
50
40
30
20
10
00
1.8VOUT Efficiency
VIN=3.2V
VIN=3.6V
VIN=4.2V
100 200 300 400 500
OUTPUT CURRENT (mA)
1.2VOUT Efficiency
100
90 VIN=3.2V
80
70
VIN=3.6V
60
50
VIN=4.2V
40
30
20
10
00 100 200 300 400 500
OUTPUT CURRENT (mA)
1.0VOUT Efficiency
100
90 VIN=3.2V
80
70
VIN=3.6V
60
50 VIN=4.2V
40
30
20
10
00 100 200 300 400 500
OUTPUT CURRENT (mA)
Quiescent Current
vs. Input Voltage
900
850
800
750
700
650
6020.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
INPUT VOLTAGE (V)
Frequency
vs. Input Voltage
4.5
4.3
4.1
3.9
3.27.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
INPUT VOLTAGE (V)
Enable Threshold
vs. Supply Voltage
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6 LowQ = VIN
0.5
2.7 3.4 4.1 4.8 5.5
SUPPLY VOLTAGE (V)
January 2006
5
MIC2245
1.5VOUT Efficiency
100
90 VIN=3.2V
80
70
VIN=3.6V
60
VIN=4.2V
50
40
30
20
10
00 100 200 300 400 500
OUTPUT CURRENT (mA)
Load Regulation
1.004
1.002
1.000
0.998
0.996 VIN=3.6V
0.994 LowQ=VIN
0.992
0.9900
100 200 300 400 500
OUTPUT CURRENT (mA)
Peak Current Limit
vs. Supply Voltage
1200
1000
800
600
400
200
LowQ = VIN
0
2.7 3.4 4.1 4.8 5.5
SUPPLY VOLTAGE (V)
M9999-012406
www.micrel.com
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