Archive Eepn Com Cluster Common Eepn Images Articles 25867
Archive Eepn Com Cluster Common Eepn Images Articles 25867
Archive Eepn Com Cluster Common Eepn Images Articles 25867
Archive Eepn Com Cluster Common Eepn Images Articles 25867
Archive Eepn Com Cluster Common Eepn Images Articles 25867

DC/DC Controller Complies With VRM8.5 Specs

Feb. 1, 2002

Readied for the latest generation of low-voltage CPUs, including Tualatin Pentium IIIs, the FAN5070 synchronous-mode dc/dc controller boast of an output that can be dynamically programmed over a 1.05V to 1.825V range in 25-mV steps using a five-bit VID D/A converter. This capability makes the device compliant with VRM8.5 specifications. In a 20-pin SOIC, the controller integrates high current drivers for external MOSFETs to output load currents up to 28A (typ.). Operating from 5V and 12V inputs, conversion efficiency exceeds 85% at full loads. Other features include remote-voltage sensing, overvoltage protection, undervoltage lockout, power-good indication, and enable/soft-start control. In addition, a programmable active droop is included with headroom up to 200 mV, thereby reducing the size of output capacitors required. User-adjustable current limiting is another feature of the chip. In tube or tape-and-reel packing, price is $1.35 each/1,000. FAIRCHILD SEMICONDUCTOR INTERNATIONAL, San Jose, CA. (888) 522-5372.

Comments

To join the conversation, and become an exclusive member of Electronic Design, create an account today!