MAX4473 Low-Cost / Low-Voltage / PA Power Control Amplifier

MAX4473 Low-Cost / Low-Voltage / PA Power Control Amplifier

The MAX4473 PA power control IC is intended for closed-loop bias control of GSM power amplifiers. The device facilitates accurate control of the current delivered to the power amplifier (PA) via a control voltage. The error amplifier senses the voltage drop across an external current-sense resistor .

Features

o Optimized for GSM Timing Requirements o +2.7V to +6.5V Single-Supply Operation o 1.2mA Supply Current o ≤1µA Supply Current in Shutdown Mode o Guaranteed 1.5µs Enable/Disable Times o Active Output Pull-Down in Shutdown Mode o Rail-to-Rail Error Amplifier Output o Rail-to-Rail Power Control Input o Output Drive Capability—500Ω and 300pF Loads o +1V to VCC Current Sense Input Common-Mode Voltage Range o No Phase-Reversal for Common-Mode Voltage from 0 to VCC o External Current Sensing and Gain Setting Resistors Maximize Flexibility o Available in a Space-Saving 8-pin µMAX MAX4473 Ordering In.