ISL9012(2008) Просмотр технического описания (PDF) - Intersil

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ISL9012
(Rev.:2008)

Dual LDO with Low Noise, Low IQ, and High PSRR

Intersil 

Typical Performance Curves (Continued)

ISL9012

VO2 (10mV/DIV)

3

2

1

0

5

0

VIN = 5.0V

VO1 = 3.3V

VO2 = 2.8V

IL1 = 150mA

IL2 = 300mA

CL1, CL2 = 1µF

CBYP = 0.01µF

0 100 200 300 400 500 600 700 800 900 1000

TIME (µs)

FIGURE 14. TURN ON/TURN OFF RESPONSE

4.3V

3.6V

VO = 3.3V

ILOAD = 150mA

CLOAD = 1µF

CBYP = 0.01µF

10mV/DIV

400µs/DIV

FIGURE 15. LINE TRANSIENT RESPONSE, 3.3V OUTPUT

4.2V

3.5V

VO = 2.8V

ILOAD = 300mA

CLOAD = 1µF

CBYP = 0.01µF

10mV/DIV

400µs/DIV

FIGURE 16. LINE TRANSIENT RESPONSE, 2.8V OUTPUT

VO (25mV/DIV)

VO = 1.8V

VIN = 2.8V

300mA

10µA

ILOAD

100µs/DIV

FIGURE 17. LOAD TRANSIENT RESPONSE

100

90

80

70

60

50

40

30

20

10

0

0.1k

VIN = 3.6V

VO = 1.8V

IO = 10mA

CBYP = 0.01µF

CLOAD = 1µF

1k

10k

100k

1M

FREQUENCY (Hz)

FIGURE 18. PSRR vs FREQUENCY

1000

100

10

VIN = 3.6V

VO = 1.8V

ILOAD = 10mA

1 CBYP = 0.01µF

CIN = 1µF

CLOAD = 1µF

0.1

10

100

1k

10k

100k

1M

FREQUENCY (Hz)

FIGURE 19. SPECTRAL NOISE DENSITY vs FREQUENCY

7

FN9220.3

March 11, 2008

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