MIC22405 Datasheet, PDF (9/30 Pages) Micrel Semiconductor – 4A Integrated Switch High-Efficiency Synchronous Buck Regulator

Micrel, Inc.
MIC22405
Typical Characteristics (Continued)
100
95
90
85
80
75
70
0
Efficiency (V_IN = 5.0V)
vs. Output Current
V_IN = 5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
0.9V
0.8V
0.7V
1
2
3
4
5
6
OUTPUT CURRENT (A)
IC Power Dissipation (V_IN = 5.0V)
vs. Output Current
1.20
3.3V
0.96
2.5V
1.8V
1.5V
0.72
1.2V
1.0V
0.9V
0.8V
0.48
0.7V
0.24
0.00
0
V_IN = 5.0V
1
2
3
4
OUTPUT CURRENT (A)
Case Temperature* (V_IN = 5.0V)
vs. Output Current
80
60
40
20
0
0
V_IN = 5V
V_OUT = 1.8V
1
2
3
4
OUTPUT CURRENT (A)
Die Temperature* : The temperature measurement was taken at the hottest point on the MIC22405 case and mounted on a five-
square inch PCB (see Thermal Measurements section). Actual results will depend upon the size of the PCB, ambient temperature, and
proximity to other heat-emitting components.
June 2011
9
M9999-061511-A