Fairchild Intros FAN5070 DC/DC Controller

Fairchild Semiconductor International (San Jose, CA) announced its new FAN5070, a synchronous-mode, low-voltage dc/dc controller for the latest generation of low-voltage CPUs. The output voltage of the FAN5070 can be dynamically programmed using a five-bit VID DAC over a 1.05V to 1.825V range in 25mV steps, which complies with VRM8.5 specifications.

The new dc/dc controller includes integrated high-current drivers for external power MOSFETs to deliver load currents up to 28A in typical applications. Operating from 5V and 12V inputs, the conversion efficiency achieved by the FAN5070 has been demonstrated to exceed 85 percent at full loads.

The FAN5070 features reliable designs with fewer external components, including remote voltage sensing, over-voltage protection, under-voltage lockout, power-good indication and enable/soft-start control. Programmable active droop is also provided, with headroom up to 200mV to minimize the size of the output capacitors and optimize the response to transient load changes. User-adjustable current limiting is an additional benefit.

The FAN5070 is now available in a 20-pin SOIC package and is supplied in either tube or tape-and-reel packing. Pricing is $1.35 in 1,000-piece quantities, with delivery in seven to eight weeks ARO.