Fairchild Semiconductor International (San Jose, CA) introduced the FAN5250, a dc/dc controller designed in conjunction with Transmeta Systems to meet the requirements of the T5500 and T5800 Crusoe processors in notebook computers.
Accepting input voltages from input sources, including ac wall-brick adapters and battery packs ranging from 5V to 24V, the FAN5250 performs synchronous conversion to provide over 5A loads in typical applications. The FAN5250’s output is adjustable by a five-bit VID DAC between 0.6V and 1.75V, using a low-drift onboard reference with an accuracy of better than one percent.
The FAN5250 also features integrated high-current drivers for external power MOSFETs, reducing the overall parts count and increasing reliability. A programmable soft-start control reduces inrush current and output overshoot at startup. Safety features include low-cost, current-limiting, power MOSFET RDS(on) characteristics; over-voltage protection; and under-voltage lockout. The FAN5250 is available in a compact 24-pin QSOP package, supplied in either tube or tape-and-reel packaging.
Evaluation samples are now available. Pricing for the FAN5250QSC is $2.99 for 1,000-piece quantities. Delivery is seven to eight weeks ARO.
