ISL9440CIRZ datasheet(10/24 Pages) INTERSIL

Part #	ISL9440CIRZ

Description	Triple Step-Down PWM and Single Linear Controller with Programmable Soft-Start

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Manufacturer	INTERSIL [Intersil Corporation]

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

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10 / 24 page

10

FN6799.0

January 15, 2009

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 ISL9440BEVAL1Z Evaluation Board, VIN = 19V Unless Otherwise Noted).

FIGURE 2. PWM1 LOAD REGULATION

FIGURE 3. PWM1 EFFICIENCY vs LOAD (VO = 5.0V),

RJK0305DPB FOR UPPER MOSFET AND

RJK0301DPB FOR LOWER MOSFET

LOAD CURRENT (A)

4.95

4.96

4.97

4.98

4.99

5.00

5.01

5.02

5.03

5.04

5.05

0

8

12

16

VIN = 19V

VIN = 12V

VIN = 6V

4

60

65

70

75

80

85

90

95

100

0

4

6

8

10

12

14

16

LOAD CURRENT (A)

VIN = 23VDC

VIN = 16VDC

2

VIN = 19VDC

ISL9440B, ISL9440C

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ISL9440CIRZ Datasheet(PDF) 10 Page - Intersil Corporation

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