MIC4744 Datasheet, PDF (5/23 Pages) Micrel Semiconductor – 4 MHz Dual 2A Integrated Switch Buck Regulator

Micrel, Inc.
Typical Characteristics
3.3Vin 1.0Vout Efficiency
76
74
72
70
68
66
64
62
60
58
56
0
3.0Vin
3.3Vin
3.6Vin
0.4
0.8
1.2
1.6
2
OUTPUT CURRENT (A)
5.0Vin 1.2Vout Efficiency
80
78
76
74
72
70
68
66
64
62
60
0
4.5Vin
5.0Vin
5.5Vin
0.4
0.8
1.2
1.6
2
OUTPUT CURRENT (A)
3.3Vin 1.8Vout Efficiency
88
86
84
82
80
78
76
74
72
70
68
0
3.0Vin
3.3Vin
3.6Vin
0.4
0.8
1.2
1.6
2
OUTPUT CURRENT (A)
5.0Vin 2.5Vout Efficiency
94
92
90
88
86
84
82
80
78
76
74
0.0
4.5Vin
5.0Vin
5.5Vin
0.4
0.8
1.2
1.6
2.0
OUTPUT CURRENT (A)
March 2009
5.0Vin 1.0Vout Efficiency
76
74
72
70
68
66
64
62
60
58
56
0
4.5Vin
5.0Vin
5.5Vin
0.4
0.8
1.2
1.6
2
OUTPUT CURRENT (A)
3.3Vin 1.5Vout Efficiency
84
82
80
78
76
74
72
70
68
66
64
0
3.0Vin
3.3Vin
3.6Vin
0.4
0.8
1.2
1.6
2
OUTPUT CURRENT (A)
5.0Vin 1.8Vout Efficiency
88
86
84
82
80
78
76
74
72
70
68
0
4.5Vin
5.0Vin
5.5Vin
0.4
0.8
1.2
1.6
2
OUTPUT CURRENT (A)
5.0Vin 3.3Vout Efficiency
96
94
92
90
88
86
84
82
80
78
76
0.0
4.5Vin
5.0Vin
5.5Vin
0.4
0.8
1.2
1.6
2.0
OUTPUT CURRENT (A)
5
MIC4744
3.3Vin 1.2Vout Efficiency
80
78
76
74
72
70
68
66
64
62
60
0
3.0Vin
3.3Vin
3.6Vin
0.4
0.8
1.2
1.6
2
OUTPUT CURRENT (A)
5.0Vin 1.5Vout Efficiency
84
82
80
78
76
74
72
70
68
66
64
0
4.5Vin
5.0Vin
5.5Vin
0.4
0.8
1.2
1.6
2
OUTPUT CURRENT (A)
3.3Vin 2.5Vout Efficiency
94
92
90
88
86
84
82
80
78
76
74
0
3.0Vin
3.3Vin
3.6Vin
0.4
0.8
1.2
1.6
2
OUTPUT CURRENT (A)
Load Regulation
1.010
1.005
1.000
0.995
0.990
0
Vin=3.3V
0.4
0.8
1.2
1.6
2
OUTPUT CURRENT (A)
M9999-030209-C