IR3842WMPBF Datasheet, PDF(25/34 Page) International Rectifier – HIGHLY EFFICIENT INTEGRATED 4A SYNCHRONOUS BUCK REGULATOR

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IR3842WMPBF Datasheet, PDF (25/34 Pages) International Rectifier – HIGHLY EFFICIENT INTEGRATED 4A SYNCHRONOUS BUCK REGULATOR

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IR3842WMPbF

TYPICAL OPERATING WAVEFORMS

Vin=12.0V, Vcc=5V, Vo=1.8V, Io=0-4A, Room Temperature, No Air Flow

Fig. 17. Start up at 4A Load

Ch1:Vin, Ch2:Vo, Ch3:Vss, Ch4:Enable

Fig. 18. Start up at 4A Load,

Ch1:Vin, Ch2:Vo, Ch3:Vss, Ch4:VPGood

Fig. 19. Start up with 1.62V Pre

Bias, 0A Load, Ch2:Vo, Ch3:VSS

Fig. 20. Output Voltage Ripple, 4A

load Ch2: Vo

Fig. 21. Inductor node at 4A load

Ch2:LX

Rev 11.0

Fig. 22. Short (Hiccup) Recovery

Ch2:Vo , Ch3:VSS

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