Hittite introduces a pair of GaAs InGaP HBT MMIC VCOs with integrated resonators, negative resistance devices, varactor diodes and buffer amplifiers covering applications from 5.0 to 6.1 GHz. The HMC430LP4 and HMC431LP4 are ideal for C-band applications including 802.11a or HiperLAN WLAN, VSAT, UNII, and point-to-point radios. Both VCO product require no external components, consume 27 mA from a single supply of +3 V and are packaged in low cost, leadless plastic QFN 4 × 4 mm surface mount packages. The HMC430LP4 provides a +2 dBm buffered output and low phase noise of 103 dBc/Hz at 100 kHz offset over 5.0 to 5.5 GHz. The HMC431LP4 provides a +2 dBm buffered output and low phase noise of 102 dBc/Hz at 100 kHz phase noise offset over 5.5 to 6.1 GHz.