XR79203 Datasheet, PDF (9/19 Pages) Exar Corporation – 40V, 3A Synchronous Step-Down

XR79203
Typical Performance Characteristics (Continued)
Efficiency and Package Thermal Derating
T_A = 25°C, No airflow, f = 500kHz, unless otherwise specified. Schematic shown in Figure 27.
100
95
90
85
80
75
70
65
60
55
50
0.1
5.0V DCM
3.3V DCM
1.8V DCM
5.0V CCM
3.3V CCM
1.8V CCM
1.0
IOUT (A)
Figure 20. Efficiency, V_IN = 12V
100
95
90
85
80
75
70
65
60
55
50
0.1
700kHz
12.0V DCM
5.0V DCM
3.3V DCM
1.8V DCM
12.0V CCM
5.0V CCM
3.3V CCM
1.8V CCM
1.0
IOUT (A)
Figure 22. Efficiency, V_IN = 24V
120
115
110
105
100
95
90
85
80
1.0
5.0V CCM
3.3V CCM
1.8V CCM
1.5
2.0
2.5
3.0
IOUT (A)
Figure 21. Maximum T_AMBIENT vs. I_OUT,
V_IN = 12V
120
115
110
105
100
700kHz
95
90
12.0V CCM
5.0V CCM
85
3.3V CCM
1.8V CCM
80
1.0
1.5
2.0
2.5
3.0
IOUT (A)
Figure 23. Maximum T_AMBIENT vs. I_OUT,
V_IN = 24V
REV1B
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