Intersil has added to its range of dual output integrated FET buck regulators with three devices that provide up to 95% power conversion efficiency.

The ISL8022, ISL8033/A and ISL8036/A have quiescent currents as low as 40µA and support an input voltage range of 2.85V to 6V.

This makes them suitable for single Li+ cell, three NiMH cell or 3V/5V DC input voltage applications.

The ISL8033/A and ISL8036/A are dual output step-down DC/DC regulators that can deliver up to 3A continuous output current per channel.

The ISL8022 provides similar functionality for lower current applications, delivering up to 2A/1.7A continuous output current on two channels.

The two channels in the ISL8033/A, ISL8036/A and ISL8022 switch 180 degrees out-of-phase, which according to the supplier reduces the input ripple current and filter requirements.

 
The ISL8033 and ISL8036 offer a fixed switching frequency of 1MHz, while the ISL8033A and ISL8036A switch at 2.5MHz to significantly reduce the overall DC/DC converter size. The ISL8033 and ISL8036 can also be synchronized to an external clock of up to 6MHz.