MIC28304 Datasheet, PDF (9/39 Pages) Micrel Semiconductor – 70V 3A Power Module

Micrel, Inc.
Typical Characteristics (Continued)
Feedback Voltage
vs. Output Current (MIC28304-1)
0.808
0.804
VIN = 12V
V_OUT = 5.0V
F_SW = 600kHz
0.800
0.796
0.792
0.0 0.5 1.0 1.5 2.0 2.5 3.0
OUTPUT CURRENT (A)
Line Regulation
vs. Output Current (MIC28304-1)
1.0%
0.5%
0.0%
-0.5%
-1.0%
VIN = 12V to 75V
V_OUT = 5.0V
F_SW = 600kHz
-1.5%
-2.0%
-2.5%
-3.0%
0.0 0.5 1.0 1.5 2.0 2.5 3.0
OUTPUT CURRENT (A)
Efficiency (VIN = 18V)
vs. Output Current (MIC28304-1)
100
90
5.0V
80
3.3V
2.5V
70
1.8V
1.2V
60
0.8V
50
40
30
20
10
0.01
F_SW = 600kHz
CCM
0.1
1
10
OUTPUT CURRENT (A)
Efficiency (VIN = 24V)
vs. Output Current (MIC28304-1)
100
90
80
5.0V
3.3V
70
2.5V
1.8V
60
1.2V
50
0.8V
40
30
20
10
0.01
F_SW = 600kHz
CCM
0.1
1
10
OUTPUT CURRENT (A)
Efficiency (VIN = 48V)
vs. Output Current (MIC28304-1)
100
90
80
5.0V
70
3.3V
60
2.5V
1.8V
50
1.2V
40
0.8V
30
20
10
0.01
F_SW = 600kHz
CCM
0.1
1
10
OUTPUT CURRENT (A)
Efficiency (VIN = 70V)
vs. Output Current (MIC28304-1)
100
90
80
70
5.0V
60
50
40
30
20
10
0.01
3.3V
2.5V
1.8V
1.2V
0.8V
F_SW = 600kHz
CCM
0.1
1
10
OUTPUT CURRENT (A)
MIC28304
Efficiency (VIN = 12V)
vs. Output Current (MIC28304-1)
100
90
5.0V
80
3.3V
2.5V
70
1.8V
1.2V
60
0.8V
50
40
30
20
10
0.01
F_SW = 600kHz
CCM
0.1
1
10
OUTPUT CURRENT (A)
Efficiency (VIN = 38V)
vs. Output Current (MIC28304-1)
100
90
5.0V
80
3.3V
70
2.5V
60
1.8V
50
1.2V
40
0.8V
30
F_SW = 600kHz
20
CCM
10
0.01
0.1
1
10
OUTPUT CURRENT (A)
Efficiency
vs. Output Current (MIC28304-1)
100
18VIN
95
24VIN
90
36VIN
48VIN
85
70VIN
80
75
70
65
60
55
50
0.01
V_OUT = 12V
F_SW = 600kHz
CCM
R3 = 23.2kΩ
0.1
1
10
OUTPUT CURRENT (A)
March 25, 2014
9
Revision 1.1