MIC24051 Datasheet, PDF (9/30 Pages) Micrel Semiconductor – 12V, 6A High-Efficiency Buck Regulator

Micrel, Inc.
Typical Characteristics (Continued)
100
95
90
85
80
75
70
65
60
55
50
0
Efficiency (VIN = 12V)
vs. Output Current
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
0.9V
0.8V
123 45678
OUTPUT CURRENT (A)
IC Power Dissipation (VIN = 12V)
vs. Output Current
2.5
VIN = 12V
2.0
1.5
VOUT = 5.0V
1.0
0.5
0.0
0
VOUT = 0.8V
1
2
3
4
5
6
OUTPUT CURRENT (A)
MIC24051
Die Temperature* (VIN = 12V)
vs. Output Current
60
50
40
30
20
10
0
0
VIN = 12V
VOUT = 1.8V
1
2
3
4
5
6
OUTPUT CURRENT (A)
Thermal Derating*
vs. Ambient Temperature
12
10
0.8V
8
6
1.5V
4
VIN = 5V
2
VOUT = 0.8, 1.2, 1.5V
0
-50 -25
0
25 50 75 100 125
AMBIENT TEMPERATURE (°C)
Thermal Derating*
vs. Ambient Temperature
12
10
1.8V
8
6
3.3V
4
VIN = 5V
2
VOUT = 1.8, 2.5, 3.3V
0
-50 -25
0
25 50 75 100 125
AMBIENT TEMPERATURE (°C)
Thermal Derating*
vs. Ambient Temperature
12
10
0.8V
8
1.8V
6
4
VIN = 12V
VOUT = 0.8, 1.2, 1.8V
2
0
-50 -25
0
25 50 75 100 125
AMBIENT TEMPERATURE (°C)
Thermal Derating*
vs. Ambient Temperature
12
10
2.5V
8
6
5V
4
VIN = 12V
2 ^{VOUT = 2.5, 3.3, 5V}
0
-50 -25
0
25 50 75 100 125
AMBIENT TEMPERATURE (°C)
Die Temperature* : The temperature measurement was taken at the hottest point on the MIC24051 case mounted on a 5 square inch 4 layer, 0.62”,
FR-4 PCB with 2oz finish copper weight per layer, see Thermal Measurement section. Actual results will depend upon the size of the PCB, ambient
temperature and proximity to other heat emitting components.
November 2012
9
M9999-112612-A