2

AN1482.0

June 30, 2009

What’s Inside

The Evaluation Board Kit contains the following materials:

• The ISL9440CEVAL1Z

• The ISL9440B, ISL9440C datasheet

• This EVAL KIT document

Recommended Equipment

The following materials are recommended to perform

testing:

• 0V to 20V Power Supply with at least 10A Source Current

Capability

• Three Electronic Loads Capable of Sinking Current up to 7A

• Digital Multimeters (DMMs)

• 100MHz Quad-Trace Oscilloscope

• Signal Generator (for load transient tests)

Quick Test Guide

1. Ensure that the circuit is correctly connected to the supply

and electronic loads prior to applying any power. Please

refer to Figure 2 for proper set-up.

2. Connect Jumpers J3, J4 and J5 in the ENx positions.

3. Turn on the power supply

4. Adjust input voltage VIN within the specified range and

observe output voltage. The output voltage variation

should be within 3%.

5. Adjust load current within the specified range and

observe output voltage. The output voltage variation

should be within 3%.

6. Use oscilloscope to observe output voltage ripple and

Phase node ringing. For accurate measurement, refer to

Figure 3 for proper test set-up.

Electrical Specifications

Recommended operation conditions unless otherwise noted. Refer to schematic and typical

performance curves.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

All outputs are in regulation

6.0

12

16

V

0.97

1.00

1.03

V

3.25

3.32

3.4

V

4.85

5.0

5.15

V

2.43

2.50

2.57

V

PWM1 Rated Current

outputs are fully loaded

67

A

PWM2 Rated Current

67

A

PWM3 Rated Current

45

A

LDO Rated Current

R7 = 0

Ω, R4 is not populated

0.8

1.0

A

Oscilloscope is with full bandwidth

19.8

59.6

66.5

Application Note 1482