DATASHEET
ISL8025, ISL8025A FN8357
Rev 1.00
December 19, 2013 Compact Synchronous Buck Regulators
The ISL8025, ISL8025A are highly efficient, monolithic,
synchronous step-down DC/DC converters that can deliver 5A of
continuous output current from a 2.7V to 5.5V input supply. The
devices use current mode control architecture to deliver a very low
duty cycle operation at high frequency with fast transient
response and excellent loop stability.
The ISL8025, ISL8025A integrates a very low ON-resistance
P-Channel (36mО©) high-side FET and N-Channel (13mО©)
low-side FET to maximize efficiency and minimize external
component count. The 100% duty-cycle operation allows less
than 180mV dropout voltage at 5A output current. The
operation frequency of the pulse-width modulator (PWM) is
adjustable from 500kHz to 4MHz. The default switching
frequency, which is set by connecting the FS pin high, is 1MHz
for the ISL8025 and 2MHz for the ISL8025A.
The ISL8025, ISL8025A 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 …
