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