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MIC2225 Datasheet(PDF) 6 Page - Micrel Semiconductor

Part No. MIC2225
Description  2MHz 600mA Synchronous Buck Regulator with 300mA LDO
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Maker  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
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MIC2225 Datasheet(HTML) 6 Page - Micrel Semiconductor

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Micrel, Inc.
MIC2225
February 2008
6
M9999-022008-D
Typical Characteristics (DC-DC)
0
10
20
30
40
50
60
70
80
90
100
0
0.1 0.2 0.3
0.4 0.5 0.6
LOAD CURRENT (A)
1.2V Efficiency @ –40°C
2.7VIN
5.5VIN
3.6VIN
0
10
20
30
40
50
60
70
80
90
100
0
0.1 0.2 0.3
0.4 0.5 0.6
LOAD CURRENT (A)
1.2V Efficiency @ 25°C
2.7VIN
5.5VIN
3.6VIN
0
10
20
30
40
50
60
70
80
90
100
0
0.1 0.2 0.3 0.4 0.5 0.6
LOAD CURRENT (A)
1.2V Efficiency @ 70°C
2.7VIN
5.5VIN
3.6VIN
0
25
50
75
100
125
150
2.5
3
3.5
4
4.5
5
5.5
INPUT VOLTAGE (V)
Quiescent Current
vs. Input Voltage
VOUT = 1.2V
LOAD = 0
ENLDO = 0V
EN = VIN
0
200
400
600
800
1000
1200
Quiescent Current
vs. Load Current
VOUT = 1.2V
EN = VIN
ENLDO = 0V
40
60
LOAD CURRENT (mA)
30
50
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
2.5
3
3.5
4
4.5
5
5.5
INPUT VOLTAGE (V)
Enable Threshold
vs. Input Voltage
VOUT = 1.19V
ENLDO = 5V
0
10
20
30
40
50
60
70
80
90
100
2.5
3
3.5
4
4.5
5
5.5
INPUT VOLTAGE (V)
Turn-On Time
vs. Input Voltage
VOUT = 1.19V
VLDO = 2.8V
ENLDO = 5V
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
2.5
3
3.5
4
4.5
5
5.5
INPUT VOLTAGE (V)
Peak Current Limit
vs. Input Voltage
VOUT = 1.2V
EN = ENLDO = VIN
1.5
1.7
1.9
2.1
2.3
2.5
2.7
2.9
2.5
3
3.5
4
4.5
5
5.5
INPUT VOLTAGE (V)
Frequency
vs. Input Voltage
VOUT = 1.2V
LOAD = 0
ENLDO = VIN


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