MIC28510_12 Datasheet, PDF (8/30 Pages) Micrel Semiconductor – 75V/4A Hyper Speed Control Synchronous DC/DC Buck Regulator

Micrel, Inc.
Typical Characteristics (Continued)
Enable Threshold
vs. Temperature
1.0
0.9
0.8
RISING
0.7
0.6 _{VIN = 48V}
VDD = 5V
0.5
-50 -25 0
FALLING
25 50 75 100 125
TEMPERATURE (°C)
Efficiency
vs. Output Current
100
4.5V_IN
95
90
6V_IN
85
80
75
70
48V_IN
65
60
55
50
0
75V_IN
V_OUT = 3.3V
V_DD = 5V
f_SW = 250kHz
1
2
3
4
OUTPUT CURRENT (A)
MIC28510
0.808
0.804
0.800
0.796
0.792
0
Feedback Voltage
vs. Output Current
V_IN = 48V
V_OUT = 3.3V
VDD = 5V
fSW = 250kHz
1
2
3
4
OUTPUT CURRENT (A)
0.3%
0.2%
0.1%
0.0%
-0.1%
-0.2%
-0.3%
0
Line Regulation
vs. Output Current
VIN = 5V to 75V
V_OUT = 3.3V
V_DD = 5V
fSW = 250kHz
1
2
3
4
OUTPUT CURRENT (A)
Efficiency (VIN = 5V)
vs. Output Current
100
90
80
70
f_sw = 250kHz
60
50
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
0.9V
0.8V
40
30
0
1
2
3
4
5
6
OUTPUT CURRENT (A)
100
90
80
70
60
50
40
30
20
10
0
Efficiency (V_IN = 48V)
vs. Output Current
f_SW = 250kHz
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
0.9V
0.8V
1
2
3
4
5
6
OUTPUT CURRENT (A)
100
90
80
70
60
50
40
30
20
10
0
Efficiency (V_IN = 75V)
vs. Output Current
fSW = 250kHz
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
0.9V
0.8V
1
2
3
4
5
6
OUTPUT CURRENT (A)
Die Temperature* (VIN = 5.0V)
vs. Output Current
80
60
40
20
0
0
V_IN = 5.0V
VOUT = 3.3V
VDD= 5V
f_SW = 250kHz
1
2
3
4
OUTPUT CURRENT (A)
Die Temperature* (VIN = 48V)
vs. Output Current
80
60
40
20
0
0
`
V_IN = 48V
V_OUT = 3.3V
VDD= 5V
fSW = 250kHz
1
2
3
4
OUTPUT CURRENT (A)
March 2012
8
M9999-030912-A