1.5A synchronous buck in a 2x3 DFN
The ISL8009AIRZ-T is a 1.5A step-down buck converter from Renesas, switching at 1.6 MHz with an integrated synchronous rectifier. The high switching frequency lets the designer use a smaller inductor and output capacitor than a 500 kHz part would require, saving board area in a point-of-load rail. Input range is 2.7V to 5.5V, and the adjustable output goes from 0.8V up to the input voltage. That covers the common 3.3V and 5V intermediate buses, plus sub-1V core rails for low-voltage logic.
Package and thermal land
The exposed paddle must be soldered to a thermal land on the PCB — without that thermal path, the 1.5A continuous output will drive the junction temperature above the 85°C ambient rating.