MIC2103_13 Datasheet, PDF (10/38 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
fSW = 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
fsw = 200kHz
0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
OUTPUT CURRENT (A)
Efficiency (V_IN = 24V)
vs. Output Current (MIC2104)
100
90
5.0V
80
3.3V
70
2.5V
1.8V
60
1.2V
0.8V
50
40
30
20
10
fSW = 200kHz
0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
OUTPUT CURRENT (A)
Efficiency (V_IN = 38V)
vs. Output Current (MIC2104)
100
90
80
5.0V
70
3.3V
2.5V
60
1.8V
1.2V
50
0.8V
40
30
20
10
fSW = 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
1.2V
50
0.8V
40
30
20
10
fSW = 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
0.8V
40
30
20
10
fSW = 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)
vs. Output Current
140
120
100
80
60
40
VIN = 12V
20
VOUT = 5.0V
fSW = 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
VIN = 48V
20
VOUT = 5.0V
fSW = 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
VIN = 75V
20
VOUT = 5.0V
fSW = 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.
November 26, 2013
10
Revision 2.0