The PA's is designed for low current-consumption 802.11b and 802.11g multi-mode applications such as Mini-PCI and PCMCIA for portable devices. The low profile plastic package with internal input matching to 50 minimizes the PCB board-space and allows simplified integration with very few passive components. The on-chip power-detector provides a voltage linear to the output power while the standby/bias control logic provides power saving and shutdown as well as a linear adjustment of output power. The PA is realized as a two stage PA with internal interstage-matching and an open-collector output structure.