Micrel Increases the Operating Frequency of the MIC4690
Micrel Semiconductor Inc. (San Jose, CA) announced that it has increased the operating frequency of its SupwerSwitcher SO-8 buck regulator to 500KHz. The MIC4690, the newest member of the SuperSwitcher family, has an input range of 4V to 34V. It has a 1.3A output current and requires four external components.
The MIC4690 allows designs with built-in safety features such as a cycle-by-cycle current limit, frequency foldback, short-circuit protection and thermal shutdown. It is available in an adjustable output-voltage version, with fixed 3.3V and 5.0V output versions planned to be available soon. With up to 90-percent efficiency, the device is suitable for applications in distributed-power designs, hard-disk drives, battery chargers and positive-to-negative converters.
"The MIC4690 is ideal for applications where space is critical. Its high operating frequency allows the use of small inductors and capacitors. Its fused-power SO-8 leadframe allows over 1.3A of continuous output current, replacing bulky D2PAK and TO-220 packages," said Tony Grizelj, Micrel's marketing manager for power products.
The MIC4690 is priced at $2.30 in 1,000-piece quantities. Samples are available from stock, and production quantities are stock to 12 weeks ARO.