Voltage regulators enable energy-efficient computing

International Rectifier announces the expansion of its SupIRBuck family of integrated point-of-load (POL) voltage regulators. The new IR347x and IR386x devices for energy-efficient computing and consumer applications feature hysteretic constant on-time (COT) modulators with adaptive dead-time control to achieve superior light load and full load efficiency.

The IR347x and IR386x SupIRBuckTM family, which integrates a high performance controller with optimized power MOSFETs in a slim 4 x 5 or 5 x 6 mm PQFN package, is designed with a 0.5 V, 1% accurate internal reference voltage, allowing very low and precise output voltage programmability. The new products also offer over-temperature protection, thermally compensated over-current protection, over- and under-voltage protection, pre-bias start-up, power good output, and enable input with voltage monitoring capability.  

The IR347x family is capable of up to 27 V input voltage and available in a 4 x 5 and 5 x 6 mm PQFN package to cover a range of loads from 6 to 15 A. These options and excellent light load efficiency make the IR347x a suitable choice for power conversion in mobile applications such as laptop computers. Other applications for the IR347x family include light industrial and battery-based applications that operate from 24-V rails.

The IR3863 and IR3865, available in a 4 x 5 mm PQFN package, are optimized for 12 V input applications such as laptop computers including those designed with the recently announced second generation Intel Core processor family. In addition, the new SupIRBuck devices are well suited to consumer dc-dc applications including printers, LCD TVs, and game consoles.  

For more information, contact International Rectifier, 233 Kansas St., El Segundo, CA 90245. Phone: (310) 252-7105.