MIC24055 Datasheet, PDF (7/29 Pages) Micrel Semiconductor – 12V, 12A High-Efficiency Buck Regulator

Micrel, Inc.
Typical Characteristics (Continued)
Switching Frequency
vs.Output Voltage
700
650
600
550
500
450
400
350
300
250
200
VIN= 12V
150
I_OUT = 0A
100
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
OUTPUT VOLTAGE (V)
VIN Operating Supply Current
vs. Temperature
40
30
20
10
0
-50 -25
VIN = 12V
V_OUT = 1.8V
I_OUT = 0A
SWITCHING
0 25 50 75 100 125
TEMPERATURE (°C)
VDD UVLO Threshold
vs. Temperature
5
RISING
4
FALLING
3
2
1
HYST
0
-50 -25
0
25 50 75 100 125
TEMPERATURE (°C)
Feedback Voltage
vs. Temperature
0.808
0.804
0.800
0.796
VIN = 12V
V_OUT = 1.8V
I_OUT = 0A
0.792
-50 -25 0 25 50 75 100 125
TEMPERATURE (°C)
Line Regulation
vs. Temperature
0.4%
0.3%
0.2%
0.1%
0.0%
-0.1%
-0.2%
-50
VIN = 4.5V to 19V
V_OUT = 1.8V
I_OUT = 0A
-25 0 25 50 75 100 125
TEMPERATURE (°C)
Switching Frequency
vs. Temperature
750
700
650
600
550
500
450
400
350
-50 -25
VIN = 12V
V_OUT = 1.8V
I_OUT = 0A
0 25 50 75 100 125
TEMPERATURE (°C)
MIC24055
VIN Shutdown Current
vs. Temperature
10
8
6
4
2
0
-50 -25
VIN = 12V
I_OUT = 0A
V_EN = 0V
0 25 50 75 100 125
TEMPERATURE (°C)
Load Regulation
vs. Temperature
1.0%
0.5%
0.0%
-0.5%
VIN = 12V
V_OUT = 1.8V
I_OUT =0A to 12A
-1.0%
-50 -25 0 25 50 75 100 125
TEMPERATURE (°C)
VDD
vs. Temperature
6
5
4
3
2
-50 -25
VIN = 12V
V_OUT = 1.8V
I_OUT = 0A
0
25 50 75 100 125
TEMPERATURE (°C)
December 2012
7
M9999-120712-A