DC/DC Buck Converter for RF Power Amplifier
 
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Overview

FAN5902, 800mA, 6MHz 0.4-3.4V Buck Converter for WDCMA/CDMA RFPAs with Integrated 50mohm bypass FET

The FAN5902 is a high-efficiency, low-noise, synchronous, step-down DC-to-DC converter designed for powering the radio frequency power amplifiers (RFPA) in 3G mobile handsets and other mobile applications. It provides up to 800mA of output current over an input voltage range of 2.7V to 5.5V. The output voltage can be dynamically adjusted from 0.4V up to 3.4V, proportional to an analog input voltage ranging from 0.2V to 1.7V provided by an external DAC. This allows supplying the RFPA with the voltage level that provides optimum Power Added Efficiency (PAE).

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Datasheet, Application Note, & Evaluation Boards


Datasheet
Application Note
Download the short version of the FAN5902 datasheet. A detailed version of this datasheet is available upon request from your local sales office.
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Features & Benefits

800mA RMS output current
3.1V to 4.5V Input Voltage (2.7v to 5.5Vmax)
20µs Transition Time for WCDMA standard
6MHz PWM Operation
92% Efficiency Synchronous Operation
0.5uH Inductor
50mΩ bypass FET rated for 2.5A DC Current
12-Bump (0.05mm) WLCSP
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Applications

WCDMA/CDMA mobile handsets
G wireless USB & uPCI cards
Other DC/DC converters for RF applications
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FAN5902, DC/DC for RFPA Video

Length: 3 minutes 25 seconds

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