The RMPA1953-103 is a power amplifier for CDMA and CDMA2000-1X personal communications system (PCS) applications. The PA is internally matched to 50 ohms to minimize the use of external components. Advanced DC power management reduces current consumption during peak phone usage at backed-off RF power levels. Advanced digital bias control reduces the number of interface components to baseband. High power-added efficiency and excellent linearity are achieved using Raytheon's InGaP Heterojunction Bipolar Transistor (HBT) technology.