BD3509MUV-E2(2009) データシートの表示（PDF） - ROHM Semiconductor

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BD3509MUV-E2
(Rev.:2009)

Ultra Low Dropout Linear Regulators for PC Chipsets

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

Io=0A→4A/4μsec t(10μsec/div)

Fig.26 Transient Response

(0→4A)

Co=100μF

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

Vo 37mV

50mV/div

Vo

50mV/div

41mV

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)

Fig.31: Waveform at output start

PGOOD

2V/div

t(2msec/div)

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

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VEN

VCC

VIN

Vo

VCC→VEN→VIN

Fig.36 Input sequence

2009.05 - Rev.A

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