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MIC261203 Datasheet, PDF (7/31 Pages) Micrel Semiconductor – 28V, 12A Hyper Light Load™ Synchronous DC/DC Buck Regulator
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Micrel, Inc.
Typical Characteristics (Continued)
VIN Operating Supply Current
vs. Temperature
1.0
0.8
0.6
0.4
0.2
0.0
-50
VIN = 12V
VOUT = 1.8V
IOUT = 0A
SWITCHING
-25 0 25 50 75 100 125
TEMPERATURE (°C)
VIN Shutdown Current
vs. Temperature
10
8
6
4
VIN = 12V
2
IOUT = 0A
VEN = 0V
0
-50 -25
0
25 50 75 100 125
TEMPERATURE (°C)
0.808
0.804
0.800
Feedback Voltage
vs. Temperature
VIN = 12V
VOUT = 1.8V
IOUT = 3A
0.796
0.792
-50 -25 0 25 50 75 100 125
TEMPERATURE (°C)
Load Regulation
vs. Temperature
0.4%
0.2%
0.0%
-0.2%
VIN = 12V
VOUT = 1.8V
IOUT =3A to 12A
-0.4%
-50 -25 0 25 50 75 100 125
TEMPERATURE (°C)
Switching Frequency
vs. Temperature
700
VIN = 12V
VOUT = 1.8V
650
IOUT = 3A
600
550
500
-50 -25
0 25 50 75 100 125
TEMPERATURE (°C)
VDD
vs. Temperature
6
5
4
VIN = 12V
3
VOUT = 1.8V
IOUT =0A
2
-50 -25 0
25 50 75 100 125
TEMPERATURE (°C)
MIC261203
VDD UVLO Threshold
vs. Temperature
5
Rising
4
Falling
3
2
1
Hyst
0
-50 -25
0
25 50 75 100 125
TEMPERATURE (°C)
Line Regulation
vs. Temperature
0.4%
0.2%
0.0%
-0.2%
VIN = 4.5V to 28V
VOUT = 1.8V
IOUT = 3A
-0.4%
-50
-25 0 25 50 75 100 125
TEMPERATURE (°C)
Current Limit
vs. Temperature
30
25
20
15
10
VIN = 12V
VOUT =
5
0
-50 -25 0
25 50 75 100 125
TEMPERATURE (°C)
July 2011
7
M9999-071311-A
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