MIC28304 Datasheet, PDF (14/39 Pages) Micrel Semiconductor – 70V 3A Power Module

Micrel, Inc.
Typical Characteristics (Continued)
Thermal Derating
3
VIN = 12V
2
VIN = 18V
VIN = 48V
VIN = 24V
1
V_OUT = 5V
F_SW = 600kHz
MIC28304-2
T_{j_MAX} = 125°C
0
25
40
55
70
85
100
MAXIMUM AMBIENT TEMPERATURE
(°C)
Thermal Derating
3
VIN = 12V
2
VIN = 18V
VIN = 48V
VIN = 24V
1
V_OUT = 3.3V
F_SW = 600kHz
MIC28304-2
T_{j_MAX} = 125°C
0
25
40
55
70
85
100
MAXIMUM AMBIENT TEMPERATURE
(°C)
Thermal Derating
3
VIN = 12V
2
VIN = 24V
VIN =18V
1
VIN = 48V
V_OUT = 1.8V
F_SW = 600kHz
MIC28304-2
T_{j_MAX} =125°C
0
25
40
55
70
85
100
MAXIMUM AMBIENT TEMPERATURE
(°C)
Thermal Derating
3
VIN = 12V
VIN = 24V
2
VIN =18V
VIN = 48V
1
V_OUT = 1.2V
F_SW = 600kHz
MIC28304-2
T_{j_MAX} =125°C
0
25
40
55
70
85
100
MAXIMUM AMBIENT TEMPERATURE
(°C)
Thermal Derating
3
V_OUT = 12V
F_SW = 600kHz
MIC28304-2
R3 = 23.2kΩ
T_{j_MAX} =125°C
2
18VIN
VIN = 24V
VIN48=V4IN8V
1
0
25
40
55
70
85
100
MAXIMUM AMBIENT TEMPERATURE
(°C)
IC Power Dissipation
vs. Output Current (MIC28304-2)
9
8
V_OUT = 12V
R3 = 23.2kΩ
7
F_SW = 600kHz
6
5
4
70VIN
48VIN
36VIN
24VIN
18VIN
3
2
1
0
0
1
2
3
4
OUTPUT CURRENT (A)
MIC28304
Thermal Derating
3
VIN = 12V
2
VIN = 48V
VIN = 24V
VIN =18V
1
V_OUT = 2.5V
F_SW = 600kHz
MIC28304-2
T_{j_MAX} = 125°C
0
25
40
55
70
85
100
MAXIMUM AMBIENT TEMPERATURE
(°C)
Thermal Derating
3
VIN = 12V
2
VIN = 24V
VIN =18V
1
V_OUT = 0.8V
F_SW = 600kHz
MIC28304-2
T_{j_MAX} =125°C
0
25
40
VIN = 48V
55
70
85
100
MAXIMUM AMBIENT TEMPERATURE
(°C)
Efficiency
vs. Output Current (MIC28304-2)
100
95
90
18VIN
24VIN
85
36VIN
80
48VIN
75
70VIN
70
65
V_OUT = 12V
F_SW = 600kHz
60
R3 = 23.2kΩ
55
50
0
0.6 1.2 1.8 2.4
3
3.6
OUTPUT CURRENT (A)
March 25, 2014
14
Revision 1.1