XRP7708 Datasheet, PDF(8/27 Page) Exar Corporation – Quad Channel Digital PWM Step Down Controller

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XRP7708 Datasheet, PDF (8/27 Pages) Exar Corporation – Quad Channel Digital PWM Step Down Controller

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XRP7708

Quad Channel Digital PWM Step Down Controller

TYPICAL PERFORMANCE CHARACTERISTICS

All data taken at TJ = TA = 25Â°C, unless otherwise specified - Schematic and BOM from Application Information section of

this datasheet.

Fig. 4: 12Vin Efficiency: Single Channel

300kHz - Channels not in use are disabled

FET: Si4944; Inductor: 744314xxx 7x7x5mm

Fig. 5: 12Vin Combined Efficiency, 5V & 3V3 @ 5A, 1V8 &

1V @ 8A, 5V & 3V3 - FET: FDS8984; Inductor: 744314490

7x7x5mm 1V8 & 1V - FETs: SiR466 upper, SiR464 lower;

Inductor: 7443551130 13x13x6.5mm

Fig. 6: 12Vin Efficiency: Single Channel

300kHz - Channels not in use are disabled

FET: FDS8984; Inductor:744310200 7x7x3mm

Fig. 7: 12Vin Efficiency: Single Channel

1MHz - Channels not in use are disabled

FET: FDS8984; Inductor:744310200 7x7x3mm

Fig. 8: Simultaneous Start-up Configuration

CH1:3.3V CH2:5V CH3:1V CH4:1.8V

Fig. 9: Simultaneous Soft-Stop

CH1:3.3V CH2:5V CH3:1V CH4:1.8V

Â© 2010 Exar Corporation

8/27

Rev. 1.0.3

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