DATASHEET
ISL8023, ISL8024 FN7812
Rev 3.00
March 24, 2014 Compact Synchronous Buck Regulator Features The ISL8023, ISL8024 are highly efficient, monolithic,
synchronous step-down DC/DC converters that can deliver 3A
(ISL8023) or 4A (ISL8024) of continuous output current from a
2.7V to 5.5V input supply. The devices use current mode control
architecture to deliver very low duty cycle operation at high
frequency with fast transient response and excellent loop stability. 2.7V to 5.5V input voltage range Very low on-resistance FET’s -P-Channel 45mΩ and
N-Channel 19mΩ typical values High efficiency synchronous buck regulator with up to 95%
efficiency The ISL8023 and ISL8024 integrate a very low On-resistance
P-Channel (45mО©) high side FET and N-Channel (19mО©) low
side FET to maximize efficiency and minimize external
component count. The 100% duty-cycle operation allows less
than 200mV dropout voltage at 4A output current. The
operation frequency of the pulse-width modulator (PWM) is
adjustable from 500kHz to 4MHz. The default switching
frequency of 1MHz is set by connecting the FS pin high, which
allows for the use of small external components. 0.8% reference accuracy over-temperature/load/line Complete BOM with as few as 3 external parts Start-up with pre-biased output Internal soft-start -1ms or adjustable Soft-stop output discharge during disabled Adjustable frequency from 500kHz to 4MHz -default at
1MHz (8023/24), 2MHz (8023A/24A) The ISL8023, ISL8024 can be configured for discontinuous or
forced continuous operation at light load. Forced continuous
operation reduces noise and RF interference while
discontinuous mode provides higher efficiency by reducing …
