DATASHEET
ISL85418 FN8369
Rev 5.00
March 13, 2015 Wide VIN 800mA Synchronous Buck Regulator
The ISL85418 is a 800mA synchronous buck regulator with an
input range of 3V to 40V. It provides an easy to use, high
efficiency low BOM count solution for a variety of applications. Features The ISL85418 integrates both high-side and low-side NMOS
FETs and features a PFM mode for improved efficiency at light
loads. This feature can be disabled if forced PWM mode is
desired. The part switches at a default frequency of 500kHz
but may also be programmed using an external resistor from
300kHz to 2MHz. The ISL85418 has the ability to utilize
internal or external compensation. By integrating both NMOS
devices and providing internal configuration options, minimal
external components are required, reducing BOM count and
complexity of design. Synchronous operation for high efficiency With the wide VIN range and reduced BOM, the part provides
an easy to implement design solution for a variety of
applications while giving superior performance. It will provide
a very robust design for high voltage industrial applications as
well as an efficient solution for battery powered applications. Minimal external components required The part is available in a small Pb-free 4mmx3mm DFN plastic
package with an operation temperature range of -40В°C to
+125В°C. Medical devices Wide input voltage range 3V to 40V No compensation required Integrated high-side and low-side NMOS devices Selectable PFM or forced PWM mode at light loads Internal fixed (500kHz) or adjustable switching frequency
300kHz to 2MHz Continuous output current up to 800mA Internal or external soft-start Power-good and enable functions available Applications Industrial control Portable instrumentation Distributed power supplies Related Literature Cloud infrastructure AN1905, “ISL85410EVAL1Z, ISL85418EVAL1Z Wide VIN 1A, …
