VISHAY Intertechnology, represented in Australia by Braemac , has released an integrated dc-to-dc buck converter in a 20-port, surface-mount BGA package that measures 14.7mm x 12.2 mm x 3.2mm.
The FX5545G108 FunctionPAK converts 2.5V to 6V inputs to an output voltage range of 0.9V to 4.5V with an efficiency of up to 95%. It is rated for a maximum current of 4A and for an output power of 15W with a 1µA shutdown current.
It is designed to adjust and stabilise the input power in point of load applications to semiconductor devices such as FPGAs, microprocessors, DSPs and DDR-SDRAMs. It can also be used to stabilise, filter, reduce ripple and shift dc voltage levels. It can also stabilise battery voltage outputs at a specific lower voltage level. It is suitable for use in amplifiers, VoIP platforms, routers, professional digital cameras, portable computers and battery backup systems.
It requires no external components to provide a complete solution. Programmable PWM/PSM controls ensure high efficiency, with the converter operating in synchronous rectified PWM mode under full load and shifting into externally controlled pulse-skipping mode (PSM) under light load conditions.
The converter has a 100% duty cycle control for PSM operation, acting much like a saturated linear regulator to extract every bit of power from single-cell Li+ or triple-cell NiCd and NiMH battery packs and delivering the highest potential output voltage. The FunctionPAK device is compatible with a variety of battery configurations and chemistries, including NiCd, NiMH, and Li+.
FunctionPAK converters have a combination of primary and secondary power MOSFETs, a controller IC, and up to 18 passive components in one package, taking up significantly less board space than even the tightest discrete layout while delivering efficiency up to 95%.
The BGA package for FunctionPAK is rated for the full industrial temperature range of -40°C to 85°C and specified for military operating temperatures, shock levels, and moisture resistance.