MIC23201 Datasheet, PDF (6/20 Pages) Micrel Semiconductor – 2MHz PWM 2A Buck Regulator

Micrel Inc.
Typical Characteristics (Continued)
Enable Input Current
vs. Temperature
1.00
Feedback Voltage
vs. Output Current
0.650
0.80
0.640
0.60
0.630
0.40
0.20
V_IN = 3.3V
V_EN = V_IN
0.00
-50
-25 0 25 50 75
TEMPERATURE (°C)
100 125
0.620
0.610
0.600
0.0
V_IN = 3.3V
V_OUT = 1.8V
0.5
1.0
1.5
2.0
OUTPUT CURRENT (A)
MIC23201
0.00%
-0.20%
-0.40%
-0.60%
-0.80%
-1.00%
-1.20%
-1.40%
-1.60%
-1.80%
-2.00%
0.0
Line Regulation
vs. Output Current
V_IN = 2.7V to 5.5V
V_OUT = 1.8V
0.5
1.0
1.5
2.0
OUTPUT CURRENT (A)
3000
2800
2600
2400
2200
2000
1800
1600
1400
1200
1000
0.0
Switching Frequency
vs. Output Current
V_IN = 3.3V
V_OUT = 1.8V
0.5
1.0
1.5
2.0
OUTPUT CURRENT (A)
100
90
80
70
60
50
40
30
20
10
0
0
Efficiency (V_IN = 3.3V)
vs. Output Current
2.5V
1.8V
1.5V
1.2V
0.95V
V_IN = 3.3V
0.6
1.2
1.8
2.4
3
OUTPUT CURRENT (A)
100
90
80
70
60
50
40
30
20
10
0
0
Efficiency (V_IN = 5V)
vs. Output Current
3.6V
3.3V
2.7V
2.5V
1.8V
1.5V
1.2V
0.95V
V_IN = 5V
0.6
1.2
1.8
2.4
3
OUTPUT CURRENT (A)
100
90
80
70
60
50
40
30
20
10
0
0
Efficiency
vs. Output Current
3.3V_IN
5.0V_IN
V_OUT = 1.8V
0.5
1
1.5
2
OUTPUT CURRENT (A)
2.000
1.800
1.600
1.400
1.200
1.000
0.800
0.600
0.400
0.200
0.000
0.0
Output Voltage
vs. Load Current
V_IN = 3.3A
V_OUT = 1.8V
1.0
2.0
3.0
4.0
5.0
LOAD CURRENT (A)
1000000
V_OUT Rise Time vs. CSS
100000
10000
1000
100
10
1
100
1000
V_IN = 3.3V
V_OUT = 1.8V
10000 100000
CSS (pF)
1000000
August 2012
6
M9999-082912-A