MIC24054 Datasheet, PDF (8/30 Pages) Micrel Semiconductor – 12V, 9A High-Efficiency Buck Regulator

Micrel, Inc.
Typical Characteristics (Continued)
Feedback Voltage
vs. Output Current
0.808
0.804
0.800
0.796
VIN = 12V
VOUT = 1.8V
0.792
0
1.5
3
4.5
6
7.5
9
OUTPUT CURRENT (A)
1.819
1.814
1.810
1.805
1.800
1.796
1.791
1.787
1.782
0
Output Voltage
vs. Output Current
VIN = 12V
VOUT = 1.8V
1.5
3
4.5
6
7.5
9
OUTPUT CURRENT (A)
MIC24054
Line Regulation
vs. Output Current
1.0%
0.5%
0.0%
-0.5%
-1.0%
0
VIN = 4.5V to 19V
VOUT = 1.8V
1.5
3
4.5
6
7.5
9
OUTPUT CURRENT (A)
Switching Frequency
vs. Output Current
700
650
600
550
500
2
VIN = 12V
VOUT = 1.8V
4
6
8
10
OUTPUT CURRENT (A)
Output Voltage (VIN = 5V)
vs. Output Current
5.0
VIN = 5V
4.6
VFB < 0.8V
4.2
3.8
TA
25ºC
85ºC
3.4
125ºC
3.0
0
2
4
6
8
10
12
OUTPUT CURRENT (A)
Die Temperature* (VIN = 5V)
vs. Output Current
80
60
40
20
0
0
VIN = 5V
VOUT = 1.8V
1.5
3
4.5
6
7.5
9
OUTPUT CURRENT (A)
Die Temperature* (VIN = 12V)
vs. Output Current
80
60
40
20
0
0
VIN = 12V
VOUT = 1.8V
2
3
5
6
8
9
OUTPUT CURRENT (A)
IC Power Dissipation (VIN = 5V)
vs. Output Current
3.5
VIN = 5V
3.0
2.5
VOUT = 3.3V
2.0
1.5
1.0
0.5
VOUT = 0.8V
0.0
0
1.5
3
4.5
6
7.5
9
OUTPUT CURRENT (A)
IC Power Dissipation (VIN = 12V)
vs. Output Current
3.5
VIN = 12V
3.0
2.5
VOUT = 5.0V
2.0
1.5
1.0
0.5
VOUT = 0.8V
0.0
0
1.5
3
4.5
6
7.5
9
OUTPUT CURRENT (A)
Die Temperature* : The temperature measurement was taken at the hottest point on the MIC24054 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.
October 2012
8
M9999-102512-A