Fairchild Introduces New Family of UltraFET Devices

Fairchild Semiconductor announced a new family of 100, 200 and 220V N-channel UltraFET devices available in ultra-compact (3mm x 3mm) molded leadless packages (MLP). These devices are well-suited for primary-side switches in isolated dc-dc converter applications, such as work stations, telecom and networking equipment, where improving system efficiency and saving board space are mandatory design goals.

Fairchild's 200V device, the FDMC2610, boasts a low Miller charge (3nC vs. 4nC) and on-resistance (218mΩ vs. 240mΩ) when compared with similar 200V MLP 3x3 devices on the market. These characteristics result in a 25% better Figure of Merit (FOM) and translate into superior thermal and switching performance in dc-dc converter applications. The 200V device also offers top-level thermal resistance (Theta JC) compared with similarly packaged devices (5C/W vs. 25C/W), a heat-dissipating feature that ensures reliability even in demanding environments.

In addition to offering superior thermal and switching performance over similarly packaged MLP devices on the market, Fairchild's UltraFET devices consume 50% less board space than SO-8-packaged devices typically used in dc-dc converter designs. This package-size-reduction enables engineers to design smaller, higher-density dc-dc converters by reducing the MOSFET footprint area and enhancing package thermal capability.

To complement this offering of three N-channel devices, Fairchild also introduced a 150V P-channel planar UltraFET device, which is also available in an MLP 3x3. This device option offers designers a complete solution for their active-clamp switch topologies requiring both N- and P-channel MOSFETs. These lead (Pb)-free devices meet or exceed the requirements of the joint IPC/JEDEC standard J-STD-020C and are compliant with European Union regulations now in effect.

The units are priced as follows (1000 pcs): US$ 1.06 – FDMC2674 (220V, N-Channel); US$ 0.96 – FDMC2610 (200V, N-Channel); US$ 1.11 – FDM3622 (100V, N-Channel); US$ 0.78 – FDMC2523P (150V, P-Channel). Samples and demo board available now with an ARO of 8 weeks.