SKY77336

PRELIMINARY DATA SHEET SKY77336 Power Amplifier Module for Quad-Band GSM / GPRS Applications Quad-band cellular handsets GMSK Modulation - Class 4 GSM850/900 - Class 1 DCS1800/ PCS1900 - Class 12 GPRS multi-slot operation EDGE modulation - Class E2 GSM850/900 - Class E2 DCS1800/ PCS1900 Features High efficiency: - GSM850, 55% - GSM900, 55% - DCS, 53% - PCS, 53% Small outline - 5 x 5 mm Low profile - 1.15 mm Max Low VRAMP current - 10 μA Description SKY77336 Power Amplifier Module (PAM) is designed in a compact form factor for quad-band cellular handsets comprising GSM850/900, DCS1800 and PCS1900, supporting Gaussian Minimum-Shift Keying (GMSK) and Polar Enhanced Data for GSM Evolution (EDGE) modulation. Class 12 General Packet Radio Service (GPRS) multi-slot operation is also supported. The module consists of GSM850/900 PA and DCS1800/PCS1900 PA blocks, impedance matching circuitry for 50 Ω input and output impedances, and a Power Amplifier Control (PAC) block. The custom CMOS integrated circuit provides the internal PAC function and interface circuitry. Fabricated in InGaP/GaAs, the Heterojunction Bipolar Transistor (HBT) PA blocks support the GSM850/900 bands and DCS1800/PCS1900 bands. Both PA blocks share common power supply pads to distribute current. The InGaP/GaAs die, Silicon (Si) controller die, and passive components are mounted on a multi-layer laminate substrate and the entire assembly is encapsulated with plastic overmold. RF input and output ports...