XRP7714_1009 Datasheet, PDF (8/29 Pages) Exar Corporation – Quad Channel Digital PWM Step Down Controller

XRP7714
Quad Channel Digital PWM Step Down Controller
TYPICAL PERFORMANCE CHARACTERISTICS
All data taken at TJ = TA = 25°C, unless otherwise specified - Schematic and BOM from Application Information section of
this datasheet.
1
0.9
3.3V
2.5V
1.8V
0.8
1.0V
0.7
0.6
Fig. 4: 12Vin Efficiency: Single Channel
300kHz - Channels not in use are disabled
FET: Si4944; Inductor: 744314xxx 7x7x5mm
0.5
0
1
2
3
4
Output Current (Amps)
Fig. 5: 12Vin Efficiency: Single Channel
300kHz - Channels not in use are disabled
FET: FDS8984; Inductor: 744310200 7x7x3mm
100%
90%
80%
2.5V
1.8V
1.2V
1.0V
70%
60%
50%
0
1
2
3
4
5
Output Current (Amps)
Fig. 6: 5Vin Efficiency: Single Channel
300kHz - Channels not in use are disabled
FET: Si4944; Inductor: 744314xxx 7x7x5mm
1
0.9
3.3V
1.8V
0.8
1.2V
1.0 V
0.7
0.6
0.5
0
1
2
3
4
Output Current (Amps)
Fig. 7: 5Vin Efficiency: Single Channel
300kHz - Channels not in use are disabled
FET: FDS8984; Inductor: 744310200 7x7x3mm
100%
90%
80%
70%
60%
50%
0
1
2
3
4
Output Current Amps
Fig. 8: 12Vin Combined Efficiency
5V & 3V3 1V8 & 1V@ 5A - 300 kHz
FET: FDS8984; Inductor: 744310200 7x7x3mm
Fig. 9: 12Vin Efficiency: Single Channel
1MHz - Channels not in use are disabled
FET: FDS8984; Inductor:744310200 7x7x3mm
© 2010 Exar Corporation
8/29
Rev. 1.1.4