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
V
IN
All outputs are in regulation
6.0
12
16
V
V
OUT
1
0.97
1.00
1.03
V
V
OUT
2
3.25
3.32
3.4
V
V
OUT
3
4.85
5.0
5.15
V
V
OUT
4
2.43
2.50
2.57
V
PWM1 Rated Current
V
IN
=12V, T
A
= +25°C, No forced airflow, All three PWM
outputs are fully loaded
6
7
A
PWM2 Rated Current
6
7
A
PWM3 Rated Current
4
5
A
LDO Rated Current
R7 = 0
Ω
, R4 is not populated
0.8
1.0
A
V
OUT
1 Peak-to-Peak Ripple
V
IN
= 12V, All three PWM outputs are fully loaded,
Oscilloscope is with full bandwidth
19.8
mV
P-P
V
OUT
2 Peak-to-Peak Ripple
59.6
mV
P-P
V
OUT
3 Peak-to-Peak Ripple
66.5
mV
P-P
Application Note 1482
