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MIC261203 Datasheet, PDF (6/31 Pages) Micrel Semiconductor – 28V, 12A Hyper Light Load™ Synchronous DC/DC Buck Regulator
◁
Micrel, Inc.
Typical Characteristics
VIN Operating Supply Current
vs. Input Voltage
1.0
0.8
0.6
0.4
VOUT = 1.8V
IOUT = 0A
SWITCHING
0.2
0.0
4
10
16
22
28
INPUT VOLTAGE (V)
Feedback Voltage
vs. Input Voltage
0.808
0.804
0.800
0.796
0.792
4
VOUT = 1.8V
IOUT = 3A
10
16
22
28
INPUT VOLTAGE (V)
Switching Frequency
vs. Input Voltage
700
650
600
VOUT = 1.8V
550
IOUT = 3A
500
4
10
16
22
28
INPUT VOLTAGE (V)
VIN Shutdown Current
vs. Input Voltage
60
VEN = 0V
REN = Open
45
30
15
0
4
10
16
22
28
INPUT VOLTAGE (V)
Total Regulation
vs. Input Voltage
1.0%
0.5%
VOUT = 1.8V
IOUT = 3A to 12A
0.0%
-0.5%
-1.0%
4
10
16
22
28
INPUT VOLTAGE (V)
Enable Input Current
vs. Input Voltage
16
VEN = VIN
12
8
4
0
4
10
16
22
28
INPUT VOLTAGE (V)
MIC261203
VDD Output Voltage
vs. Input Voltage
10
8
6
4
VFB = 0.9V
2
IDD = 10mA
0
4
10
16
22
28
INPUT VOLTAGE (V)
Current Limit
vs. Input Voltage
30
25
20
15
10
5
VOUT = 1.8V
0
4
10
16
22
28
INPUT VOLTAGE (V)
PG/VREF Ratio
vs. Input Voltage
100%
95%
90%
85%
80%
4
VREF = 0.7V
10
16
22
28
INPUT VOLTAGE (V)
July 2011
6
M9999-071311-A
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