DATASHEET
ISL85003, ISL85003A FN7968
Rev.2.00
Jan 15, 2016 Highly Efficient 3A Synchronous Buck Regulator Features The ISL85003 and ISL85003A are synchronous buck regulators
with integrated high-side and low-side FETs. The regulator can
operate from an input voltage range of 4.5V to 18V while
delivering a very efficient continuous 3A current. This is all
delivered in a very compact 3mmx4mm DFN package. Input voltage range 4.5V to 18V Output voltage adjustable from 0.8V, ±1% Efficiency up to 95% The ISL85003 is designed on Intersil’s proprietary fab process
that is designed to deliver very low rDS(ON) FETs with an
optimized current mode controller wrapped around it. The
high-side NFET is designed to have an rDS(ON) of 65mО© while
the low-side NFET is designed to have an rDS(ON) of 45mО©.
With these two FETs, the device delivers very high efficiency
power to the load. Integrated boot diode with undervoltage detection Current mode control
-DCM/CCM
-Internal or external compensation options
-500kHz switching frequency option
-External synchronization up to 2MHz on ISL85003 The ISL85003 can automatically switch between DCM and
CCM for light-load efficiency in DCM. The switching frequency
in CCM is internally set to 500kHz. Adjustable soft-start time on the ISL85003A Open-drain PG window comparator
-Built-in protection
-Positive and negative overcurrent protection
-Overvoltage and thermal protection …
