AS1339 Datasheet (austriamicrosystems AG)

AS1339, 650mA RF Step-Down DC-DC

The AS1339 is a high-frequency step-down converter optimized for dynamically powering the power amplifier (PA) in WCDMA or NCDMA handsets.

The device uses a 110mΩ typical bypass FET to power the PA directly from the battery during high-power transmission.

The IC integrates two 10mA low-noise, low-dr

AS1339 Features

* ! ! ! ! ! ! Fixed Switching Frequency: 2MHz PA Step-Down Converter Low Dropout Voltage Low Output-Voltage Ripple Dynamic Output Voltage Control (0.8V to 3.75V) 30µs Settling Time for 0.8V to 3.4V Output Voltage Change 650mA Output Drive Capability Two 10mA Low-Noise LDOs Low Shutdown Current Supply