MIC22205 Datasheet, PDF (8/29 Pages) Micrel Semiconductor – 2A, Integrated, Switch, High-Efficiency

Micrel, Inc.
Typical Characteristics (Continued)
Efficiency
vs. Output Current
100
95
3.3V_IN
90
85
5.0V_IN
80
75
70
65
V_OUT = 1.8V
60
55
50
0
0.5
1
1.5
2
OUTPUT CURRENT (A)
Feedback Voltage
vs. Output Current
0.724
0.716
0.708
0.700
0.692
0.684
0.676
0.0
V_IN = 3.3V
V_OUT = 1.8V
0.5
1.0
1.5
2.0
OUTPUT CURRENT (A)
Switching Frequency
vs. Output Current
1100
1050
V_IN = 3.3V
V_OUT = 1.8V
1000
950
900
0.0
0.5
1.0
1.5
2.0
OUTPUT CURRENT (A)
Output Voltage (V_IN = 3.3V)
vs. Output Current
4.3
V_IN = 3.3V
V_FB < 0.7V
3.8
3.3
2.8
2.3
0.0
T_A
25ºC
85ºC
125ºC
0.5
1.0
1.5
2.0
OUTPUT CURRENT (A)
Efficiency (V_IN = 3.3V)
100
vs. Output Current
95
90
85
80
2.5V
1.8V
75
1.5V
1.2V
70
1.0V
65
60
V_IN = 3.3V
0.9V
0.8V
0.7V
55
50
0
0.6
1.2
1.8
2.4
3
OUTPUT CURRENT (A)
IC Power Dissipation (VIN = 3.3V)
vs. Output Current
0.84
0.72
Curves Top to Bottom
3.3V
0.60
2.5V
1.8V
0.48
1.5V
1.2V
0.36
1.0V
0.9V
0.8V
0.24
0.7V
0.12
0.00
0 0.4 0.8 1.2 1.6 2
OUTPUT CURRENT (A)
MIC22205
0.60%
0.40%
0.20%
Line Regulation
vs. Output Current
V_IN = 2.9V to 5.5V
V_OUT = 1.8V
0.00%
-0.20%
-0.40%
0.0
0.5
1.0
1.5
2.0
OUTPUT CURRENT (A)
Output Voltage (V_IN = 5.0V)
vs. Output Current
6.0
V_IN = 5.0V
V_FB < 0.7V
5.5
5.0
4.5
4.0
0.0
T_A
25ºC
85ºC
125ºC
0.5
1.0
1.5
2.0
OUTPUT CURRENT (A)
Case Temperature* (V_IN = 3.3V)
vs. Output Current
80
60
40
20
0
0.0
V_IN = 3.3V
V_OUT = 1.8V
0.5
1.0
1.5
2.0
OUTPUT CURRENT (A)
August 2011
8
M9999-082511-A