MIC2101_13 Datasheet, PDF (9/36 Pages) Micrel Semiconductor – 38V, Synchronous Buck Controllers Featuring Adaptive On-Time Control

Micrel, Inc.
Typical Characteristics (Continued)
Switching Frequency
vs. Output Current (MIC2102)
700
650
25°C
600
550
500
-40°C
450
125°C
400
350
300
VIN = 12V
VOUT = 3.3V
250
200
150
100
0
2
4
6
8
10
12
OUTPUT CURRENT (A)
Efficiency (V_IN = 5V)
100 ^{vs. Output Current (MIC2102)}
90
3.3V
80
2.5V
1.8V
70
1.5V
1.2V
60
1.0V
50
0.9V
0.8V
40
30
20
10
fSW = 600kHz
0
0
4
8
12
16
OUTPUT CURRENT (A)
Feedback Voltage
vs. Output Current (MIC2102)
0.808
0.804
0.800
0.796
VIN = 12V
VOUT = 3.3V
fSW = 600kHz
0.792
0 1 2 3 4 5 6 7 8 9 10 11 12
OUTPUT CURRENT (A)
Efficiency (VIN = 12V)
vs. Output Current (MIC2102)
100
5.0V
90
3.3V
2.5V
80
1.8V
1.2V
70
0.8V
60
50
fSW = 600kHz
40
30
0
4
8
12
16
OUTPUT CURRENT (A)
Efficiency (V_IN = 24V)
vs. Output Current (MIC2102)
100
90
5.0V
80
3.3V
70
2.5V
1.8V
60
1.2V
50
0.8V
40
30
20
10
fSW = 600kHz
0
0
4
8
12
16
OUTPUT CURRENT (A)
Efficiency (V_IN = 38V)
vs. Output Current (MIC2102)
100
90
80
5.0V
3.3V
70
2.5V
60
1.8V
1.2V
50
0.8V
40
30
20
10
fSW = 600kHz
0
0
4
8
12
16
OUTPUT CURRENT (A)
MIC2101/02
Line Regulation
vs. Output Current (MIC2102)
0.3%
0.2%
0.1%
0.0%
-0.1%
-0.2%
VIN = 5V to 38V
VOUT = 3.3V
VDD = 5V
fSW = 600kHz
-0.3%
0 1 2 3 4 5 6 7 8 9 10 11 12
OUTPUT CURRENT (A)
Efficiency (V_IN = 18V)
vs. Output Current (MIC2102)
100
90
5.0V
80
3.3V
2.5V
70
1.8V
60
1.2V
0.8V
50
40
30
20
VSW = 600kHz
10
0
0
4
8
12
16
OUTPUT CURRENT (A)
November 13, 2013
9
Revision 2.0