RF power converter squeezes smallest W-CDMA/CDMA solution into CSP

RF power converter squeezes smallest W-CDMA/CDMA solution into CSP

Targeted for designers of 3G handsets and wireless datacards, the FAN5902 RF power dc/dc converter is packaged in a 12-bump 0.5-mm-pitch CSP and operates at 6 MHz with a reduced-size 0.5-µH chip inductor. This converter helps extend talk time in 3G handsets by up to 40 min over typical designs. It adapts the voltage supply level of the 3G RF power amplifier to the RF power sent through the antenna, resulting in up to 100 mA of battery current consumption savings in data-centric and smart phones.

The RF power converter provides up to 800-mA rms output to service excessive RF power amplifier current resulting from strong antenna mismatch, and has a 50-mΩ on-resistance bypass FET, enabling operation down to 2.7 V. The FAN5902 reduces RFPA heating by 20% to 40%, especially at high battery voltage, by scaling down the RFPA supply voltage. This allows a reduction in the size of the heat sink. ($0.75 ea/1,000 available now.)

Fairchild Semiconductor , South Portland , ME
Sales 207-775-8100
http://www.fairchildsemi.com