MIC23051 Datasheet, PDF (4/13 Pages) Micrel Semiconductor – 4MHz PWM Buck Regulator 4MHz PWM Buck Regulator and Voltage Scaling

Micrel, Inc.
Typical Characteristics
Quiescent Current
vs. Temperature
40
30
20
10
V_IN = 3.6V
V_OUT = 1.8V
0
20 40 60 80
TEMPERATURE (°C)
Switching Frequency
vs. Input Voltage
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.7
V_IN = 3.6V
V_OUT = 1.8V
Load = 150mA
3.2 3.7 4.2 4.7 5.2
INPUT VOLTAGE (V)
Output Voltage
vs. Input Voltage
1.90
1.85
1.80
1.75
Load = 20mA
1.70
2.7 3.2 3.7 4.2 4.7 5.2
INPUT VOLTAGE (V)
Efficiency V_OUT = 1.2V
100
V_IN = 3.6V
V_IN = 2.7V
80
V_IN = 3.3V
60
40
20
V_OUT = 1.2V
L = 1µH
01
10
100
1000
LOAD (mA)
October 2007
Quiescent Current
vs. Input Voltage
50
45
40
35
30
25
20
15
10
V_IN = 3.6V
5
V_OUT = 1.8V
No Load
0
2.7 3.2 3.7 4.2 4.7 5.2
INPUT VOLTAGE (V)
Feedback Voltage
vs. Temperature
0.80
0.78
0.76
0.74
0.72
0.70
0.68
0.66
0.64
0.62
0.60
V_IN = 3.6V
V_OUT = 1.8V
No Load
20 40 60 80
TEMPERATURE (°C)
Output Voltage
vs. Load
1.90
1.85
1.80
1.75
1.70
V_IN = 3.6V
200 300
LOAD (mA)
Efficiency V_OUT = 1.8V
100
V_IN = 2.7V
80
V_IN = 3.3V
60
V_IN = 3.6V
40
20
V_OUT = 1.8V
L = 1µH
01
10
100
1000
LOAD (mA)
4
MIC23051
Switching Frequency
vs. Temperature
5.5
5.0
4.5
4.0
3.5
V_IN = 3.6V
3.0
V_OUT = 1.8V
Load = 150mA
2.5
20 40 60 80
TEMPERATURE (°C)
Output Voltage
vs. Temperature
1.90
1.85
1.80
1.75
1.70
V_IN = 3.6V
V_OUT = 1.8V
No Load
20 40 60 80
TEMPERATURE (°C)
Efficiency V_OUT = 1V
100
80 ^{VIN = 2.7V}
60 V_IN = 3.3V
V_IN = 3.6V
40
20
V_OUT = 1V
L = 1µH
01
10
100
1000
LOAD (mA)
Efficiency V_OUT = 2.5V
100
V_IN = 3.0V
80 _{VIN = 3.6V}
V_IN = 3.3V
60
V_IN = 4.2V
40
20
V_OUT = 2.5V
L = 1µH
01
10
100
1000
LOAD (mA)
M9999-101207-C