New Industry Products

STMicroelectronics Debuts PowerFLAT Packaging

September 20, 2001 by Jeff Shepard

STMicroelectronics Inc. (Lexington, MA) introduced its latest generation of chip-scale packaging for power-integrated circuits as well as six n-channel MOSFETs that take

advantage of the new package to slash size and weight while boosting thermal and electrical performance.

The PowerFLAT case, available in 6mm x 5mm and 5mm x 5mm outlines, adopts a micro-lead-frame design that ushers in an entirely new

chip-packaging concept. Power devices ensconced in the PowerFLAT package will find wide acceptance in dc/dc converters and the battery-management sections of portable equipment, according to the company.

Of the two outlines unveiled, the 6mm x 5mm PowerFLAT case is pin compatible with a standard SO-8 package, yet accommodates 118 percent more die area. Moreover, both outlines feature an exposed back slug that

connects the MOSFET die to the printed circuit board for superior heat dissipation. The maximum height of the PowerFLAT is just 1mm. In addition to its light weight and small size, the PowerFLAT package reduces parasitic inductance to yield better MOSFET performance.

Six n-channel MOSFETs with high efficiency and solid performance, offered in the 5mm x 5mm outline version, are the STL22NF10, with a 100V drain-source breakdown voltage (BVDSS), 65mOhm typical on-resistance (RDS(on)) and a 22A continuous drain current (ID); the STL28NF3LL, with a V(BR)DSS of 30V, a typical RDS(on) of 5.5mOhm and an ID of 28A; and the STL4NM60, with a 600V BVDSS, 2 Ohm RDS(on) and a 4A ID.

The 6mm x 5mm case MOSFETs include the STL30NF3LL, with a BVDSS of 30V, a typical RDS(on) of 6mOhm and an ID of 30A; the STL35NF10, with a 100V BVDSS, 25mOhm typical RDS(on) and 35A ID; and the STL35NF3LL, with a 30V BVDSS, 6mOhm typical RDS(on) and 35A ID.

All six new PowerFLAT MOSFETs use ST's second-generation STripFETO technology. Samples are available now for the STL22NF10 and STL30NF3LL, and are forthcoming in October for the remaining PowerFLAT family MOSFETs.