BU28TA2WHFV(2009) 데이터 시트보기 (PDF) - ROHM Semiconductor

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BU28TA2WHFV
(Rev.:2009)

High-speed Load Response FULL CMOS LDO Regulators

ROHM Semiconductor 

BUTA2WNVX Series, BUTA2WHFV Series

●Reference data BU25TA2WNVX / HFV (Unless otherwise specified, Ta=25℃)

Technical Note

80

70

60

50

40

30

20

Vin= 3.5V

Io=10mA

10

Ta = 25℃

0

0.1

1

10

100

1000

Frequency (kHz)

Fig. 75 Ripple Rejection VS Freq.

80

70

60

50

40

30

20

10

0

2.5

f= 0 .1 kHz

f= 1 kHz

f= 1 0 kHz

f= 1 0 0 kHz

Co=1.0μF

Cin=none

Iout=10mA

temp=25℃

3.5

4.5

5.5

Input Voltage VIN[V]

Fig. 76 Ripple Rejection VS VIN

1.2

Co=1.0μF

Cin=1.0μF

1

Iout=10mA

temp=25℃

0.8

0.6

0.4

0.2

0

0.1

1

10

100

Frequency f [kHz]

Fig. 77 Output Noise Spectrl

Density VS Freq.

I OU T=0m A→100m A

I OU T=100m A→0m A

Fig. 78 Load Response

Fig. 79 Load Response

Fig. 80 Load Response

Fig. 81 Load Response

⇔

⇔

Fig. 82 Load Response

Current Pulse=10kHz

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Fig. 83 Load Response

Current Pulse=10kHz

2009.05 - Rev.B

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