MIC24053 Datasheet, PDF (8/30 Pages) Micrel Semiconductor – 12V, 9A High-Efficiency Buck Regulator

Micrel, Inc.
Typical Characteristics (Continued)
Switching Frequency
vs. Output Voltage
750
700
650
600
550
500
450
400
350
VIN = 12V
300
IOUT = 0A
250
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
OUTPUT VOLTAGE (V)
Feedback Voltage
vs. Output Current
0.808
0.804
0.800
0.796
0.792
0
VIN = 12V
VOUT = 1.8V
1.5
3
4.5
6
7.5
9
OUTPUT CURRENT (A)
MIC24053
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)
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
0
VIN = 12V
VOUT = 1.8V
2
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
3.4
3.0
0
TA
25ºC
85ºC
125ºC
2
4
6
8
10
12
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
2
4
6
8
10
12
OUTPUT CURRENT (A)
IC Power Dissipation (VIN = 5V)
vs. Output Current
4.0
3.5 VIN = 5V
3.0
2.5
2.0
VOUT = 3.3V
1.5
1.0
VOUT = 0.8V
0.5
0.0
0
1.5
3
4.5
6
7.5
9
OUTPUT CURRENT (A)
Die Temperature* (VIN = 5V)
vs. Output Current
100
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* : The temperature measurement was taken at the hottest point on the MIC24053 case mounted on a 5in², 4 layer, 0.62”, FR-4 PCB
with 2oz finish copper weight per layer; see the Thermal Measurements section. Actual results depend on the size of the PCB, ambient temperature, and
proximity to other heat-emitting components.
November 2012
8
M9999-110712-A