MIC24051 Datasheet, PDF (8/30 Pages) Micrel Semiconductor – 12V, 6A High-Efficiency Buck Regulator

Micrel, Inc.
Typical Characteristics (Continued)
Switching Frequency
vs.Output Voltage
700
600
500
400
300
200
VIN = 12
IOUT = 0A
100
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
OUTPUT VOLTAGE (V)
Feedback Voltage
vs. Output Current
0.808
0.804
0.800
0.796
0.792
0
VIN = 12V
VOUT = 1.8V
1
2
3
4
5
6
OUTPUT CURRENT (A)
MIC24051
1.818
1.814
1.810
1.806
1.802
1.798
1.794
1.790
1.786
1.782
0
Output Voltage
vs. Output Current
VIN = 12V
VOUT = 1.8V
1
2
3
4
5
6
OUTPUT CURRENT (A)
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
2
3
4
5
6
OUTPUT CURRENT (A)
Switching Frequency
vs. Output Current
700
650
600
550
500
0
VIN = 12V
VOUT = 1.8V
1
2
3
4
5
6
OUTPUT CURRENT (A)
Output Voltage (VIN = 5V)
vs. Output Current
5
VIN = 5V
V_FB < 0.8V
4.6
4.2
3.8
T_A
25ºC
85ºC
3.4
125ºC
3
012345678
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
1 2345 678
OUTPUT CURRENT (A)
IC Power Dissipation (VIN = 5V)
vs. Output Current
2.5
VIN = 5V
2.0
1.5
VOUT = 3.3V
1.0
0.5
VOUT = 0.8V
0.0
0
1
2
3
4
5
6
OUTPUT CURRENT (A)
Die Temperature* (VIN = 5V)
vs. Output Current
60
50
40
30
20
10
0
0
VIN = 5V
VOUT = 1.8V
1
2
3
4
5
6
OUTPUT CURRENT (A)
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
8
M9999-112612-A