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XR79110_17 Datasheet, PDF (11/19 Pages) Exar Corporation – 22V, 10A Synchronous Step Down COT Power Module
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XR79110
Efficiency and Package Thermal Derating
Unless otherwise noted: TAMBIENT = 25°C, No Air flow, f=500kHz, Schematic from the application information section.
100
98
96
94
92
90
88
86
84
82
80
78
76
74
72
70
0.1
3.3V DCM
2.5V DCM
1.8V DCM
1.5V DCM
1.2V DCM
1.0V DCM
1.0
IOUT (A)
3.3V CCM
2.5V CCM
1.8V CCM
1.5V CCM
1.2V CCM
1.0V CCM
10.0
Figure 19: Efficiency, VIN=5V
100
98
96
94
92
90
88
86
84
82
80
78
76
74
72
70
0.1
3.3V DCM
2.5V DCM
1.8V DCM
1.5V DCM
1.2V DCM
1.0V DCM
3.3V CCM
2.5V CCM
1.8V CCM
1.5V CCM
1.2V CCM
1.0V CCM
1.0
IOUT (A)
600kHz
10.0
Figure 21: Efficiency, VIN=12V
100
95
1.8V DCM
1.8V CCM
90
1.2V DCM
1.2V CCM
85
80
75
70
65
60
0.1
1.0
10.0
IOUT (A)
Figure 23: Efficiency, VIN=19.6V
130
120
110
100
90
1.0 VOUT
1.8 VOUT
80
3.3 VOUT
70
60
50
1 2 3 4 5 6 7 8 9 10
IOUT (A)
Figure 20: Maximum TAMBIENT vs IOUT, VIN=5V
130
120
110
100
90
1.0 VOUT
1.8 VOUT
80
3.3 VOUT
70
60
50
1 2 3 4 5 6 7 8 9 10
IOUT (A)
Figure 22: Maximum TAMBIENT vs IOUT, VIN=12V
130
120
110
100
90
1.2 VOUT
1.8 VOUT
80
70
60
50
1 2 3 4 5 6 7 8 9 10
IOUT (A)
Figure 24: Maximum TAMBIENT vs IOUT, VIN=19.6V
© 2015-2017 Exar Corporation
11 / 19
exar.com/XR79110
Rev 2B
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