ISL9440IRZ-T datasheet(11/20 Pages) INTERSIL

Part #	ISL9440IRZ-T

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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11 / 20 page

11

FN6383.1

December 5, 2007

FIGURE 6. PWM3 LOAD REGULATION

FIGURE 7. PWM3 EFFICIENCY vs LOAD (VO = 5V), VIN =12V,

1 DUAL SO-8 MOSFET (IRF7907) FOR UPPER

AND LOWER MOSFETS

FIGURE 8. PWM SOFT-START WAVEFORMS

FIGURE 9. OUTPUT RIPPLE UNDER MAXIMUM LOAD

(IO1 = IO1 = 6A, IO3 = 2A, IO4 = 0.5A)

FIGURE 10. VIN FALLING TO PGOOD FALLING DELAY TIME

FIGURE 11. PGOOD FALLING TO RST FALLING

Typical Performance Curves (Continued)

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

LOAD CURRENT (A)

5.05

5.06

5.07

5.08

5.09

5.10

0.0

1.0

2.0

3.0

4.0

LOAD CURRENT (A)

60

65

70

75

80

85

90

95

100

0. 0

1.0

2. 0

3.0

4. 0

VOUT2 1V/DIV

0.2ms/DIV

VOUT1 1V/DIV

VOUT4 (LDO) 1V/DIV

VOUT3 1V/DIV

VOUT1 50mV/DIV, AC COUPLED

VOUT2 50mV/DIV, AC COUPLED

VOUT3 50mV/DIV, AC COUPLED

VOUT4 50mV/DIV, AC COUPLED

5µs/DIV

VIN, 1V/DIV, CH1

RST, 5V/DIV, CH3

PGOOD, 5V/DIV, CH4

100µs/DIV

CH4

CH1

CH3

10µs/DIV

PGOOD, 5V/DIV, CH4

CH4

CH1

CH3

VIN, 1V/DIV, CH1

RST, 5V/DIV, CH3

ISL9440, ISL9440A, ISL9441

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ISL9440IRZ-T Datasheet(PDF) 11 Page - Intersil Corporation

ISL9440IRZ-T Datasheet(HTML) 11 Page - Intersil Corporation

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