MIC24056 Datasheet, PDF (8/30 Pages) Micrel Semiconductor – 12V, 12A High-Efficiency Buck Regulator

Micrel, Inc.
Typical Characteristics (Continued)
Feedback Voltage
vs. Output Current
0.808
0.804
0.800
0.796
0.792
0
VIN = 12V
V_OUT = 1.8V
2
4
6
8
10
12
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
V_OUT = 1.8V
2
4
6
8
10
12
OUTPUT CURRENT (A)
MIC24056
Line Regulation
vs. Output Current
1.0%
0.5%
0.0%
-0.5%
-1.0%
0
VIN = 4.5V to 19V
V_OUT = 1.8V
2
4
6
8
10
12
OUTPUT CURRENT (A)
Switching Frequency
vs. Output Current
700
650
600
550
500
3
VIN = 12V
V_OUT = 1.8V
4.5
6
7.5
9 10.5 12
OUTPUT CURRENT (A)
Output Voltage (VIN = 5V)
vs. Output Current
5.0
VIN = 5V
4.6
V_FB < 0.8V
4.2
3.8
T_A
25ºC
85ºC
3.4
125º
3.0
0
3
6
9
12
15
OUTPUT CURRENT (A)
100
95
90
85
80
75
70
65
60
55
50
0
Efficiency (VIN = 5V)
vs. Output Current
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
0.9V
0.8V
VIN = 5V
3
6
9
12
15
OUTPUT CURRENT (A)
IC Power Dissipation (VIN = 5V)
vs. Output Current
4.0
VIN = 5V
3.5
3.0
2.5
V_OUT = 3.3V
2.0
1.5
V_OUT = 0.8V
1.0
0.5
0.0
0
3
6
9
12
OUTPUT CURRENT (A)
Die Temperature* (VIN = 5V)
vs. Output Current
100
80
60
40
20
0
0
VIN = 5V
V_OUT = 1.8V
2
4
6
8
10
12
OUTPUT CURRENT (A)
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
VIN = 12V
3
6
9
12
15
OUTPUT CURRENT (A)
Die Temperature* : The temperature measurement was taken at the hottest point on the MIC24056 case mounted on a 5 square inch 4 layer, 0.62 inch,
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.
December 2012
8
M9999-121012-A