ISL9440 datasheet(10/20 Pages) INTERSIL

Part #	ISL9440

Description	Triple, 180째 Out-of-Phase, Step-Down

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Manufacturer	INTERSIL [Intersil Corporation]

Direct Link	http://www.intersil.com/cda/home

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10 / 20 page

10

FN6383.1

December 5, 2007

FIGURE 1. PGOOD AND RST TIMING

0

5

10

15

20

25

8

7

6

5

4

3

2

1

0

TIME (NOT TO SCALE)

VIN = 5.5V FALLING/

VOUT 1-4 OUT OF

REGULATION

VIN = 5.5V RISING/

VOUT 1-4 IN REGULATION

VIN = 5.5V RISING/

VOUT 1-4 IN REGULATION

TYP = 200ms

2.4V

0.4V

MAX = 2µs

MAX = 100µs

MAX = 6.5µs

VIN/VOUT

RST

PGOOD

Typical Performance Curves

(Oscilloscope Plots are Taken Using the ISL9440EVAL1Z Evaluation Board, VIN = 12V Unless Otherwise Noted.)

FIGURE 2. PWM1 LOAD REGULATION

FIGURE 3. PWM1 EFFICIENCY vs LOAD (VO = 2.5V),

VIN = 12V, 1 DUAL SO-8 MOSFET (IRF7907) FOR

UPPER AND LOWER MOSFETS

FIGURE 4. PWM2 LOAD REGULATION

FIGURE 5. PWM2 EFFICIENCY vs LOAD (VO = 1.5V),

VIN = 12V, 1 DUAL SO-8 MOSFET (IRF7907) FOR

UPPER AND LOWER MOSFETS

LOAD CURRENT (A)

2.45

2.46

2.47

2.48

2.49

2.50

2.51

2.52

2.53

2.54

2.55

0.01.0

2.03.0

4.05.0

6.0

7.0

LOAD CURRENT (A)

60

65

70

75

80

85

90

95

7.0

6.0

5.0

4.0

3.0

2.0

1.0

0.0

LOAD CURRENT (A)

1.45

1.46

1.47

1.48

1.49

1.50

1.51

1.52

1.53

1.54

1.55

0.01.0

2.03.0

4.05.0

6.0

7.0

LOAD CURRENT (A)

60

65

70

75

80

85

90

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

ISL9440, ISL9440A, ISL9441

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