Synchronous Buck Suits Telecom POL Coverters

Intersil’s ISL8009 is a high-efficiency, 1.5-A synchronous buck integrated FET regulator ideal for point-of-load (POL) regulation for datacom/telecom applications. The IC is designed to utilize a special multi-operation capability, allowing selection between forced-PWM mode and automatic PWM/PFM mode. This ability to switch between modes enables the regulator to maintain up to 95% efficiency in both full-load and light-load conditions. Additionally, when the device is in PFM mode, the quiescent current drops to 17 μA.

The ISL8009 features a 1.6-MHz switching frequency, allowing the use of smaller external components. The device also has internal current-mode compensation to eliminate the need for external components while contributing to fast transient response in overcurrent conditions. The ISL8009 is available now in an 8-lead DFN package, and is priced at $1.52 in 1000-unit quantities.