MIC2103 Datasheet, PDF (9/36 Pages) Micrel Semiconductor – 75V, Synchronous Buck Controllers featuring Adaptive On-Time Control

Micrel, Inc.
Typical Characteristics (Continued)
MIC2103/04
Efficiency (V_IN =12V)
vs. Output Current (MIC2104)
100
90
5.0V
3.3V
80
2.5V
70
1.8V
1.2V
60
0.8V
50
40
30
20
10
f_SW = 200kHz
0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
OUTPUT CURRENT (A)
Efficiency (V_IN = 18V)
vs. Output Current (MIC2104)
100
90
5.0V
80
3.3V
2.5V
70
1.8V
60
1.2V
0.8V
50
40
30
20
10
f_sw = 200kHz
0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
OUTPUT CURRENT (A)
Efficiency (V_IN = 24V)
100 ^{vs. Output Current (MIC2104)}
90
5.0V
80
3.3V
70
2.5V
1.8V
60
1.2V
50
0.8V
40
30
20
10
f_SW = 200kHz
0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
OUTPUT CURRENT (A)
Efficiency (V_IN = 38V)
100 ^{vs. Output Current (MIC2104)}
90
80
5.0V
70
3.3V
2.5V
60
1.8V
1.2V
50
0.8V
40
30
20
10
f_SW = 200kHz
0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
OUTPUT CURRENT (A)
Efficiency (V_IN = 48V)
100 ^{vs. Output Current (MIC2104)}
90
80
5.0V
70
3.3V
2.5V
60
1.8V
50
1.2V
0.8V
40
30
20
10
f_SW = 200kHz
0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
OUTPUT CURRENT (A)
Efficiency (V_IN = 75V)
vs. Output Current (MIC2104)
100
90
80
5.0V
70
3.3V
2.5V
60
1.8V
50
1.2V
40
0.8V
30
20
10
f_SW = 200kHz
0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
OUTPUT CURRENT (A)
Die Temperature* (V_IN = 12V)
140
vs. Output Current
120
100
80
60
40
V_IN = 12V
20
V_OUT = 5.0V
f_SW = 200kHz
0
0 1 2 3 4 5 6 7 8 9 10
OUTPUT CURRENT (A)
Die Temperature* (V_IN = 48V)
vs. Output Current
140
120
100
80
60
40
V_IN = 48V
20
V_OUT = 5.0V
f_SW = 200kHz
0
0 1 2 3 4 5 6 7 8 9 10
OUTPUT CURRENT (A)
Die Temperature* (V_IN = 75V)
vs. Output Current
140
120
100
80
60
40
V_IN = 75V
20
V_OUT = 5.0V
f_SW = 200kHz
0
0 1 2 3 4 5 6 7 8 9 10
OUTPUT CURRENT (A)
* Case Temperature: The temperature measurement was taken at the hottest point on the MIC2103 case mounted on a 5 square inch PCB, see
Thermal Measurement section. Actual results will depend upon the size of the PCB, ambient temperature and proximity to other heat emitting
components.
August 2012
9
M9999-080712-A