XR76121ELMTR-F Datasheet, PDF (6/19 Pages) Exar Corporation – PowerBlox 20A Synchronous Step-Down COT Regulators

XR76121
Typical Performance Characteristics
Efficiency and Package Thermal Derating
Unless otherwise specified: T_AMBIENT = 25°C, no airflow, f = 800kHz. Efficiency data includes inductor losses, schematic
from the Application Information section of this datasheet.
100
98 _{L = 0.4µH (1.0V, 1.2V, 1.5V, 1.8V)}
96 L = 1µH (2.5V, 3.3V, 5.0V)
94
92
90
88
86
84
82
80
78
76
74
72
70
0.1
1.0
IOUT (A)
600kHz
5.0V DCM
3.3V DCM
2.5V DCM
1.8V DCM
1.5V DCM
1.2V DCM
1.0V DCM
5.0V CCM
3.3V CCM
2.5V CCM
1.8V CCM
1.5V CCM
1.2V CCM
1.0V CCM
10.0
Figure 3. Efficiency, V_IN = 12V
100
98
96
94
92
90
88
86
84
82
80
78
76
74
72
70
0.1
600kHz
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 4. Efficiency, V_IN = 5V, L = 0.4µH
120
110
100
90
80
70
60
50
40
30
20
4
5.0V, CCM, 600kHz
2.5V, CCM, 800kHz
1.0V, CCM, 800kHz
6
8
10 12 14 16 18 20
IOUT (A)
Figure 5. Maximum T_AMBIENT vs. I_OUT,
V_IN = 12V, No Airflow
120
110
100
90
80
70
60
50
40
30
20
4
3.3V, CCM, 600kHz
1.8V, CCM, 800kHz
1.0V, CCM, 800kHz
6
8 10 12 14 16 18 20
IOUT (A)
Figure 6. Maximum T_AMBIENT vs. I_OUT,
V_IN = 5V, No Airflow
REV1A
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