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Amp up power handling via carrier-grade WiFi switch

Posted: 28 Aug 2014 ?? ?Print Version ?Bookmark and Share

Keywords:Peregrine Semiconductor? RF switch? WiFi? BYOD? mobile data?

Peregrine Semiconductor Corp. has rolled out the UltraCMOS PE42424 high-isolation, SPDT switch optimised for 802.11ac carrier and enterprise WiFi access points. According to the company, the upgraded switch is 75 per cent smaller and features a 60 per cent increase in power handling and a 350 per cent faster switching speed.

The PE42424 is intended for transmit/receive switching applications for outdoor WiFi access points that require high power handling and rugged, high-temperature performance. Peregrine's RF switch enables these WLAN products to realise the promise of 802.11ac, which is offering high data throughput in increasingly dense, bring-your-own-device (BYOD) environments.


Carriers have been experiencing an exponential increase in mobile data traffic. To provide consistent quality of service, they are offloading this traffic to WiFi networks, which are increasingly integrating 802.11ac into their small cells. Indoor units (IDUs) were the first WiFi access points to adopt the 802.11ac standard, and Peregrine's inaugural WiFi switch, the PE42423, was optimised for high performance within those devices.

Peregrine developed the PE42424 to meet these specific 802.11ac-based ODU access point needs: high power handling of 8W to accommodate the higher transmit power of the access-point radios; fast switching speed of 145ns to enable higher throughput and data rates in high-density, BYOD environments; high port-to-port isolation to reduce signal leakage between transmit and receive paths; temperature support up to 105°C to withstand harsh environments and to reduce thermal constraints; and small footprint to reduce board area and offer engineers more design options for other functions.

Peregrine's PE42424 supports the latest carrier-grade, WiFi device demands with additional features including: high linearity of 61dBm IIP3 over the entire power-supply range that enables system designs with lower supply rails and prevents linearity degradation through maximum power levels; high ESD rating of 2.5kV (on RF pins) that increases product reliability and eases manufacturing flow; smaller switch footprint that eliminates the need for external components, such as DC blocking capacitors; and control logic support for 1.8V and 3.3V and wide power supply range from 2.3-5.5V that provides design flexibility.

Peregrine's PE42424 is a SPDT RF switch featuring fast switching time (145ns with a 125kHz switching rate) and exceptional isolation (48dB at 2.4GHz and 35dB at 6GHz). The 50? absorptive switch supports 1.8V standard logic control and provides stable RF performance. Samples, evaluation kits and volume-production parts are available. Offered in a RoHS compliant, 6-lead, 1.5 x 1.5mm QFN package, the PE42424 is $0.49 each for 10K-quantity orders and $0.44 for 25K-quantity orders.

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