XR79103EL-F Datasheet, PDF (9/20 Pages) Exar Corporation – 22V, 3A Synchronous Step-Down COT Power Module

XR79103
Typical Performance Characteristics (Continued)
Efficiency and Package Thermal Derating
Unless otherwise noted: T_AMBIENT = 25°C, no airflow, f = 600kHz. Schematic shown in Figure 27.
100
95
90
85
80
75
70
65
60
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)
Figure 20. Efficiency, V_IN = 5V
125
120
115
110
105
100
95
3.3V CCM
90
1.8V CCM
1.0V CCM
85
1.0
1.5
2.0
2.5
3.0
IOUT (A)
Figure 21. Maximum T_AMBIENT vs. I_OUT,
V_IN = 5V
100
95
90
85
80
75
70
65
60
0.1
800kHz
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)
Figure 22. Efficiency, V_IN = 12V
125
120
115
110
105
100
95
3.3V CCM
90
1.8V CCM
1.0V CCM
800kHz
85
1.0
1.5
2.0
2.5
3.0
IOUT (A)
Figure 23. Maximum T_AMBIENT vs. I_OUT,
V_IN = 12V
REV1B
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