Fairchild Semiconductor Announces the FAN5091 Controller
Fairchild Semiconductor (San Jose, CA) announced the new FAN5091 two-phase, single-chip, synchronous buck controller with integrated high-current super drivers. The FAN5091 is claimed to have features that simplify power supply designs requiring 60A for the Willamette VRM9.0, Pentium IV CPUs or the 50A required for Athlon K7 CPU-based systems.
Operating from a single 5V supply, the FAN5091 features programmable active droop and achieves a 100nsec transient response when operating with minimal output capacitance. A five-bit VID DAC allows precision dynamic adjustment of the output voltage between 1.10V and 1.85V. An E* mode is also provided. Other features include power-good indication, output-enable/soft-start, under-voltage lockout, over-voltage protection and adjustable current limiting.
The FAN5091 is packaged in a 24-pin TSSOP package. An evaluation board is also available. Pricing is $3.75 each in 1,000-piece quantities. Samples are currently available, with production quantities in seven to eight weeks ARO.
