ISL9440AEVAL1Z Datasheet, PDF (1/11 Pages) Intersil Corporation – Triple PWM Step-Down Synchronous Buck Controller and One LDO

Application Note 1551
ISL9440AEVAL1Z: Triple PWM Step-Down
Synchronous Buck Controller and One LDO
ISL9440AEVAL1Z Evaluation
Board
The ISL9440AEVAL1Z evaluation board features the
ISL9440A. The ISL9440A is a a quad-output controller
that integrates three PWM synchronous buck controllers
and one low-dropout linear regulator controller. The
ISL9440A offers internal soft-start, independent enable
functions and integrates UV/OV/OC/OT protection. Its
current mode control architecture and internal
compensation network keep peripheral component
count minimal. Switching frequency of 600kHz
minimizes inductor size while the strong gate drivers
deliver up to 12A to each PWM channel.
Table 1 shows the difference in terms of ISL944xx family
features.
TABLE 1. FEATURES OF ISL944xx FAMILY
SWITCHING SOFT-STARTING
PART
EARLY FREQUENCY
TIME
NUMBER WARNING
(kHz)
(ms)
ISL9440
Yes
300
1.7
ISL9440A
Yes
600
1.7
ISL9441
No
300
1.7
ISL9440B
Yes
300
Programmable
ISL9440C
Yes
600
Programmable
The ISL9440AEVAL1Z is easy to set up to evaluate the
performance of the ISL9440A. Please refer to the
“Electrical Specifications” table on page 2 for typical
performance summary.
FIGURE 1. ISL9440AEVAL1Z EVALUATION BOARD
March 5, 2010
AN1551.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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