BD3508MUV データシートの表示（PDF） - ROHM Semiconductor

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BD3508MUV

Nch FET Ultra LDO for PC Chipsets with Power Good

ROHM Semiconductor 

BD3508MUV,BD3509MUV

●Reference Data

BD3509MUV

Vo

50mV/div

39mV

Io

2A/div

4.0A

Vo

50mV/div

51mV

Io

2A/div

4.0A

Io=0A→4A/4µsec t(10µsec/div)

Fig.25 Transient Response

(0→4A)

Co=22µF,CFB=0.01µF

Io=0A→4A/4µsec t(10µsec/div)

Fig.26 Transient Response

(0→4A)

Co=100µF

37mV

Vo

50mV/div

Vo

50mV/div

41mV

Technical Note

Vo

100mV/div

41mV

Io

2A/div

4.0A

Io=0A→4A/4µsec

t(10µsec/div)

Fig.27 Transient Response

(0→4A)

Co=47µF,CFB=0.01µF

Vo

50mV/div

39mV

Io

2A/div

4.0A

Io

2A/div

4.0A

Io=4A→0A/4µsec t(100µsec/div)

Fig.28 Transient Response

(4→0A)

Co=22µF, CFB=0.01µF

Io=4A→0A/4µsec t(100µsec/div)

Fig.29 Transient Response

(4→0A)

Co=100µF

VEN

2V/div

VEN

2V/div

VNRCS

1V/div

Vo

1V/div

VNRCS

1V/div

Vo

1V/div

PGOOD

2V/div

t(200µsec/div)

PGOOD

2V/div

t(2msec/div)

Fig.31: Waveform at output start

Fig.32 Waveform at output

OFF

Io

2A/div

4.0A

Io=4A→0A/4µsec t(100µsec/div)

Fig.30 Transient Response

(4→0A)

Co=47µF, CFB=0.01µF

VEN

VCC

VIN

Vo

VCC→VIN→VEN

Fig.33 Input sequence

VEN

VCC

VIN

Vo

VIN→VCC→VEN

Fig.34 Input sequence

VEN

VCC

VIN

Vo

VEN→VCC→VIN

Fig.35 Input sequence

VEN

VCC

VIN

Vo

VCC→VEN→VIN

Fig.36 Input sequence

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7/20

2010.04 - Rev.C

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