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FAN1539/FAN1540 Rev. 1.1.1

Typical Performance Characteristics—FAN1539MPX, FAN1540MPX,

Note:

Transient response tests require short lead lengths and low resistance connections at source and load.

Line Transient Response

Time (20

µs/div)

Time (40

µs/div)

Time (20

µs/div)

Load Transient Response

°C

(Ceramic Low ESR Capacitors)

(Ceramic Low ESR Capacitors)

Short Circuit Removal Response

Output Spectral Noise Density

vs. Frequency

Typical Region of Stability

ESR vs. Output Current*

10 mA

~3.3A

0

0

10

100

1K

10K

100K

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

10

20

30

40

50

60

70

80

90

100

Ripple Rejection vs. Frequency

Fr eq ue ncy (H z)

0.1

0

200

400

600

800

1000

1200

1400

1

10

100

1000

*Note: ESR Values measured at f = 10kHz

Region of Instability

Region of Stability

3.300V

3.300V

3.300V

Output Current (mA)

Frequency (Hz)

(Ceramic Low ESR Capacitors)

µF

µF

Ceramic Low ESR

µF

µF

°C