MIC28500 Datasheet, PDF (8/29 Pages) Micrel Semiconductor – 75V/4A Hyper Speed Control™ Synchronous DC-DC Buck Regulator

Micrel, Inc.
Typical Characteristics (Continued)
Enable Threshold
vs. Temperature
1.0
V_IN = 48V
VDD = 5V
0.9
0.8
Rising
0.7
Falling
0.6
0.5
-50 -25 0
25 50 75 100 125
TEMPERATURE (°C)
Efficiency
vs. Output Current
95
30VIN
90
85
80
48VIN
75
75V_IN
VOUT = 3.3V
70
VDD = 5V
65
fSW = 250kHz
60
55
50
0
1
2
3
4
OUTPUT CURRENT (A)
MIC28500
0.808
0.804
0.800
0.796
0.792
0
Feedback Voltage
vs. Output Current
V_IN = 48V
VOUT = 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 = 30V to 75V
VOUT = 3.3V
VDD = 5V
fSW = 250kHz
1
2
3
4
OUTPUT CURRENT (A)
June 2011
8
M9999-060311-B