NXP Semiconductors has introduced the industry’s largest portfolio of broadband 28V LDMOS two-stage, dual-path Doherty-optimized ICs for small cell base stations. The new LDMOS ICs are designed to provide RF power, efficiency, and gain in all current and proposed frequency bands, from 700 to 3800 MHz, with RF output power of 2.5 to 12 W.
The need to provide quality coverage and service to mobile phone subscribers both indoors and outdoors has resulted in the rapid increase of small cell deployments in cellular networks. This trend should continue to accelerate as the cellular industry moves toward 5G. The new LDMOS RFICs are designed to meet microcell base station requirements in all bands and at all RF power levels.
The eight new LDMOS ICs combine two stages of gain for both the carrier and peaking stages required by Doherty power amplifiers in a single device. The four symmetric devices offer ultra wideband performance, up to 900 MHz of RF bandwidth and 365 MHz of instantaneous bandwidth. The family of asymmetric products covers the full range of frequencies from 700 to 3800 MHz. All are easy to linearize with analog and digital predistortion solutions.
The LDMOS ICs are extremely rugged and can operate into an impedance mismatch (VSWR) of 10:1 when driven by twice their rated RF input power without performance degradation or failure. They also incorporate features at the die and package levels that make them extremely compact. This is of critical importance for outdoor small cells which are designed to blend unobtrusively into its environments.
Broadband symmetric Doherty-optimized power amplifier ICs include:
A2I20D020N: 1400 to 2300 MHz, average RF output power of 2.5 W, gain up to 29.7 dB, efficiency up to 43%, TO-270WB-17 plastic package
A2I20D040N: 1400 to 2300 MHz, average RF output power of 5 W, gain up to 29.7 dB, efficiency up to 46%, TO-270WB-17 plastic package
A2I25D012N: 2100 to 2900 MHz, average RF output power of 2.2 W, gain up to 27.7 dB, efficiency up to 40%, TO-270WB-15 plastic package
A2I25D025N: 2100 to 2900 MHz, average RF output power of 3.2 W, gain up to 29.1 dB, efficiency up to 40%, TO-270WB-17 plastic package
Broadband asymmetric Doherty-optimized power amplifier ICs include:
A2I08H040N: 728 to 960 MHz, average RF output power of 9 W, gain up to 30.7 dB, efficiency up to 46%, TO-270WB-15 plastic package
A2I20H060N: 1800 to 2200 MHz, average RF output power of 12 W, gain up to 28.5 dB, gain up to 44%, TO-270WB-15 plastic package
A2I25H060N: 2300 to 2690 MHz, average output power of 10.5 W, gain up to 27.5 dB, efficiency up to 41%, TO-270WB-17 plastic package
A2I35H060N: 3400 to 3800 MHz, average RF output power of 10 W, gain up to 24 dB, efficiency up to 33%, TO-270WB-17 plastic package
All eight LDMOS ICs are in production. Reference designs and evaluation boards are available. NXP showcased these amplifiers at the International Microwave Symposium, this week, May 23-26, in San Francisco, CA, Booth 1839.
