MIC22405 Datasheet, PDF (7/30 Pages) Micrel Semiconductor – 4A Integrated Switch High-Efficiency Synchronous Buck Regulator

Micrel, Inc.
Typical Characteristics (Continued)
V_IN Operating Supply Current
vs. Temperature
14.0
12.0
10.0
8.0
V_IN =3.3V
V_OUT = 1.8V
I_OUT = 0A
SWITCHING
6.0
-50 -25 0 25 50 75 100 125
TEMPERATURE (°C)
0.750
0.730
0.710
Feedback Voltage
vs. Temperature
V_IN = 3.3V
V_OUT = 1.8V
I_OUT = 0A
0.690
0.670
0.650
-50 -25 0 25 50 75 100 125
TEMPERATURE (°C)
Switching Frequency
vs. Temperature
1100
1050
1000
950
900
850
800
-50 -25
V_IN = 3.3V
V_OUT = 1.8V
I_OUT = 0A
0 25 50 75 100 125
TEMPERATURE (°C)
V_IN Shutdown Current
vs. Temperature
15
V_IN = 3.3V
12
I_OUT = 0A
V_EN/DLY =
0V
9
6
3
0
-50 -25
0
25 50 75 100 125
TEMPERATURE (°C)
Load Regulation
vs. Temperature
0.6%
0.4%
0.2%
0.0%
-0.2%
V_IN = 3.3V
V_OUT = 1.8V
I_OUT = 0A to 4A
-0.4%
-50
-25 0 25 50 75 100 125
TEMPERATURE (°C)
Enable Threshold
vs. Temperature
1.28
1.26
1.24
1.22
1.20
1.18
V_IN = 3.3V
1.16
-50
-25 0 25 50 75 100 125
TEMPERATURE (°C)
MIC22405
VIN UVLO Threshold
vs. Temperature
3.0
Rising
2.8
2.6
Falling
2.4
2.2
2.0
-50 -25 0 25 50 75 100 125
TEMPERATURE (°C)
Line Regulation
vs. Temperature
0.2%
0.1%
0.0%
-0.1%
V_IN = 2.9V to 5.5V
V_OUT = 1.8V
I_OUT = 0A
-0.2%
-50
-25 0 25 50 75 100 125
TEMPERATURE (°C)
Current Limit
vs. Temperature
15
V_IN = 3.3V
V_OUT = 1.8V
10
5
0
-50 -25 0
25 50 75 100 125
TEMPERATURE (°C)
June 2011
7
M9999-061511-A