RF Amplifier Companion Chip for Dual-Band Cellular Subscriber Terminal

The MC33170 is a complete solution for drain modulated dual–band GSM 900MHz and DCS–1800MHz Power Amplifiers. Thanks to its internal decoder, the MC33170 drastically simplifies the interface between the PAs and the baseband logic section, providing an immediate gain in part count but also in occupied copper area. The device is also ready for 1V platforms since it accepts logic high control signals down to 900mV@25°C.

Finally, an LDO delivers a stable voltage, usable for external biasing purposes.

• 1V platform compatible: ON voltage = 900mV, OFF voltage = 300mV max

• Priority management system prevents power modulation before negative bias establishes

• High performance 4.5MHz gain–bandwidth product operational amplifier

• Drives N or P–channel MOSFET

• 2.5V low–noise LDO

• Idle mode input for very low power consumption (standby mode)