ISL78225 Datasheet, PDF (20/21 Pages) Intersil Corporation – 4-Phase Interleaved Boost PWM Controller with Light Load Efficiency Enhancement

ISL78225
1. Connect the CLK_OUT pin of the master IC to the SYNC pin of
the slave IC.
2. Set the master IC’s switching frequency as desired frequency;
set the slave IC’s switching frequency 20% below the master IC’s.
3. Connect both IC’s COMP, SS and FB pins together.
4. Both IC’s DRIVE_EN pin should be ANDed together to provide
the system’s driver enable signal.
5. Since PGOOD, VOUT_OVB and VIN_OVB pins are open drain
structure, both IC’s PGOOD, VOUT_OVB and VIN_OVB pins can
be tied together and use one pull-up resistor to connect to VCC.
6. If Phase dropping function is needed, tie both IC’s IOUT and
MODE pins together.
Revision History
The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to web to make sure
you have the latest revision.
DATE
REVISION
CHANGE
December 15, 2011 FN7909.0 Initial release.
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20
FN7909.0
December 15, 2011