LX2750

Microsemi

Analog Mixed Signal Group

10

Rev. 1.0a

07/14/10

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

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OUTPUTCURRENT(mA)

FCCM=HIGH

FCCM=LOW

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OUTPUTCURRENT(mA)

FCCM=HIGH

FCCM=LOW

Demoboard waveforms(Cont')

Fig. 10 SW dynamic response when

MODE=0V,FCCM=0V, load from 3mA to 10A(CH1

SW VOUT AC 20mV/DIV, CH4 INDUCTOR

CURRENT 5A/DIV)

Fig. 11 SW dynamic response when

MODE=5V,FCCM=0V, load from 8mA to 10A(CH1

SW VOUT AC 50mV/DIV, CH4 INDUCTOR CUR-

RENT 5A/DIV)

Fig. 12 LDO dynamic response when LDO load

from 0.1A to 1A (CH1 LDODRV 1V/DIV, CH2 LDO

VOUT AC 100mV/DIV, CH4 OUTPUT CURRENT

1A/DIV)

Fig. 13 Line transient when MODE=5V(CH1 VIN

5V/DIV, CH4 SW VOUT AC 50mV/DIV)

Fig. 14 Efficiency when MODE=5V

Fig. 15 Efficiency when MODE=0V