EL7531_06 datasheet(4/11 Pages) INTERSIL

Part #	EL7531

Description	Monolithic 1A Step-Down Regulator with Low Quiescent Current

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Manufacturer	INTERSIL [Intersil Corporation]

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4

FN7428.9

July 13, 2006

Performance Curves and Waveforms

All waveforms are taken at VIN = 3.3V, VO = 1.8V, IO = 1A with component values shown on page 1 at room ambient temperature, unless otherwise

noted.

FIGURE 1. EFFICIENCY vs IO (PFM/PWM MODE)

FIGURE 2. EFFICIENCY vs IO (PWM MODE)

FIGURE 3. EFFICIENCY vs IO (PFM/PWM MODE)

FIGURE 4. EFFICIENCY vs IO (PWM MODE)

FIGURE 5. FS vs JUNCTION TEMPERATURE (PWM MODE)

FIGURE 6. LOAD REGULATIONS (PWM MODE)

40

45

50

55

60

65

70

75

80

85

90

95

100

0.001

0.010

0.100

1.000

IO (A)

VO = 3.3V

VO = 2.5V

VO = 1.8V

VO = 1.5V

VO = 1.2V

VIN = 5V

VO = 1.0V

VO = 0.8V

0

10

20

30

40

50

60

70

80

90

100

0.001

0.010

0.100

1.000

IO (A)

VO = 3.3V

VO = 2.5V

VO = 1.2V

VO = 0.8V

VIN = 5V

VO = 1.0V

VO = 1.8V

VO = 1.5V

40

45

50

55

60

65

70

75

80

85

90

95

100

0.001

0.010

0.100

1.000

IO (A)

VO = 2.5V

VO = 1.5V

VO = 1.2V

VO = 0.8V

VIN = 3.3V

VO = 1.0V

VO = 1.8V

0

10

20

40

50

60

70

80

90

100

0.001

0.010

0.100

1.000

IO (A)

30

VO = 2.5V

VO = 1.8V

VO = 1.5V

VO = 1.2V

VO = 1.0V

VO = 0.8V

VIN = 3.3V

1.32

1.34

1.36

1.38

1.4

1.42

1.44

-50

0

50

100

150

TA (°C)

VIN = 5V IO = 1A

VIN = 3.3V IO = 1A

VIN = 5V IO = 0A

VIN = 3.3V IO = 0A

-0.5%

-0.4%

-0.3%

-0.2%

-0.1%

0.0%

0.1%

0

0.2

0.4

0.6

0.8

1

IO (A)

VIN = 3.3V

VIN = 5V

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