Micrel, Inc.
Typical Characteristics (DC/DC)
MIC2807
100
90
1V OUT DC/DC Efficiency
100
90
1.2V OUT DC/DC Efficiency
100
90
1.5V OUT DC/DC Efficiency
80
70
60
50
V IN = 4.2V
V IN = 3.6V
V IN = 3V
80
70
60
50
V IN = 4.2V
V IN = 3.6V
V IN = 3V
80
70
60
50
V IN = 4.2V
V IN = 3.6V
V IN = 3V
40
30
20
10
40
30
20
10
40
30
20
10
0
0
0
0
0.1 0.2 0.3 0.4
OUTPUT CURRENT (A)
0.5
0
0.1 0.2 0.3 0.4
OUTPUT CURRENT (A)
0.5
0
0.1 0.2 0.3 0.4
OUTPUT CURRENT (A)
0.5
100
90
1.8V OUT DC/DC Efficiency
100
90
2.5V OUT DC/DC Efficiency
1.220
DC/DC Line Regulation
80
70
60
50
V IN = 4.2V
V IN = 3.6V
V IN = 3V
80
70
60
50
V IN = 4.2V
V IN = 3.6V
V IN = 3V
1.215
1.210
40
40
0
0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
30
20
10
0
0.1 0.2 0.3 0.4
OUTPUT CURRENT (A)
0.5
30
20
10
0
0.1 0.2 0.3 0.4
OUTPUT CURRENT (A)
0.5
1.205
1.200
V OUT = 1.2V
I OUT = 100mA
V DAC = 0.4V
INPUT VOLTAGE (V)
DC/DC Switching Frequency
DC/DC Current Limit
DC/DC Output Voltage
2.8
2.6
vs. Input Voltage
1.5
vs. Input Voltage
vs. DAC Voltage
4.5
V IN = 4.2V
4.0 I OUT = 100mA
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5
2.4
2.2
2.0
1.8
1.6 V OUT = 1.5V
1.4
V DAC = 0.5V
I OUT = 300mA
INPUT VOLTAGE (V)
DC/DC Load Regulation
1.3
1.1
0.9
0.7
INPUT VOLTAGE (V)
DC/DC Switching Frequency
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
DAC VOLTAGE (V)
1.825
1.823
1.821
3.5
3.0
2.5
2.0
vs. Temperature
0
V DAC = 0.5V
V OUT = 1.5V
-40 -20 0 20 40 60 80 100 120
1.819
1.817
1.815
0.1 0.2 0.3
V IN = 3.6V
0.4 0.5
1.5
1.0
0.5
V IN = 3.6V
I OUT = 300mA
OUTPUT CURRENT (A)
TEMPERATURE (°C)
February 2008
7
M9999-022008-B
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