Synchronous Buck Chip Set
Fairchild Semiconductor introduces a synchronous buck converter chipset designed specifically to optimize efficiency and space in notebooks using the latest IMVP (Intel Mobile Voltage Positioning) specifications. Utilizing Fairchild's PowerTrench® MOSFET technology, the high-side control MOSFET (FDS6298) and the low-side synchronous MOSFET (FDS6299S) form a chip set providing increased current density and improved efficiency in synchronous buck converter applications. In addition, the FDS6299S device's monolithic SyncFET technology eliminates the need for an external Schottky diode, resulting in board space savings and reduced assembly costs. This integrated chip set features a very low Qgd or Miller charge for fast switching speeds as well as a Qgd / Qgs ratio of < 1 to limit the potential for cross-conduction losses. In addition to Vcore designs, the FDS6298 and the low RDS(on) FDS6299S offer benefits as a matched pair that are well suited for high current point-of-load (POL) converters in such applications as high-end communications equipment.