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MIC23250 Datasheet(PDF) 4 Page - Micrel Semiconductor

No. de pieza MIC23250
Descripción Electrónicos  4MHz Dual 400mA Synchronous Buck Regulator with HYPER LIGHT LOAD?
Download  15 Pages
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Fabricante Electrónico  MICREL [Micrel Semiconductor]
Página de inicio  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC23250 Datasheet(HTML) 4 Page - Micrel Semiconductor

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Micrel, Inc.
MIC23250
December 2007
4
M9999-121707-A
Typical Characteristics
0
5
10
15
20
25
30
35
40
45
50
2.7
INPUT VOLTAGE (V)
Quiescent Current
vs. Input Voltage
3.2
3.7
4.2
4.7
5.2 5.7
L = 1µH
COUT = 4.7µF
0.01
0.1
1
10
1
10
100
1000
OUTPUT CURRENT (mA)
Switching Frequency
vs. Output Current
VOUT = 1.8V
L = 1µH
COUT = 4.7µF
VIN = 3.6V
VIN = 3.0V
VIN = 4.2V
4MHz
0.01
0.1
1
10
1
10
100
1000
OUTPUT CURRENT (mA)
Switching Frequency
vs. Output Current
VIN = 3.6V
VOUT = 1.8V
COUT = 4.7µF
L = 2.2µH
L = 1µH
L = 4.7µH
4MHz
3.0
3.5
4.0
4.5
5.0
Frequency
vs. Temperature
20 40 60 80
TEMPERATURE (°C)
L = 1µH
COUT = 4.7µF
Load = 120mA
1.70
1.72
1.74
1.76
1.78
1.80
1.82
1.84
1.86
1.88
1.90
1
10
100
1000
OUTPUT CURRENT (mA)
VIN = 3.6V
VIN = 3.0V
VIN = 4.2V
Output Voltage
vs. Output Current
1.72
1.74
1.76
1.78
1.82
1.84
1.86
1.88
2.7
1.70
1.80
1.90
INPUT VOLTAGE (V)
Output Voltage
vs. Input Voltage
3.2
3.7
4.2
4.7 5.2 5.7
L = 1µH
COUT = 4.7µF
Load = 300mA
Load = 1mA
Load = 10mA
Load = 50mA
Load = 150mA
Load = 400mA
1.5
1.6
1.7
1.9
Output Voltage
vs. Temperature
20 40 60 80
TEMPERATURE (°C)
L = 1µH
COUT = 4.7µF
Load = 120mA
1.8
VOUT1 = 1.575V
VOUT2 = 1.8V
0
0.2
0.4
0.6
0.8
1.2
Enable Threshold
vs. Temperature
20 40 60 80
TEMPERATURE (°C)
L = 1µH
COUT = 4.7µF
1.0 VIN = 3.6V
VIN = 2.7V
VIN = 5.5V
0.800
0.825
0.850
0.875
0.900
0.925
0.950
0.975
1.000
2.7
INPUT VOLTAGE (V)
Enable Threshold
vs. Input Voltage
3.2
3.7
4.2
4.7
5.2 5.7
VIN = 3.6V
VOUT = 1.8V
Load = 150mA
Enable OFF
Enable ON
550
600
650
700
2.7
INPUT VOLTAGE (V)
Current Limit
vs. Input Voltage
3.2
3.7
4.2
4.7 5.2 5.7
L = 1µH
COUT = 4.7µF
0
10
20
30
40
50
60
70
80
90
100
1
10
100
1000
LOAD (mA)
Efficiency VOUT = 1.8V
L = 1µH
COUT = 4.7µF
VIN = 3.0V
VIN = 2.7V
VIN = 3.6V
VIN = 4.2V
0
10
20
30
40
50
60
70
80
90
100
1
10
100
1000
LOAD (mA)
Efficiency VOUT = 1.8V
VIN = 3.6V
COUT = 4.7µF
L = 1.0µH
L = 1.5µH
L = 0.47µH


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