FAN5903 is a high-efficiency, low-noise, synchronous, step-down, DC-DC converter designed for powering 3G/3.5G/4G RF Power Amplifiers (PAs) in handsets and other mobile applications. It features a 2.7V to 5.5V input voltage range, output voltage range from 0.4V to 3.50V, 60mV typical bypass dropout voltage, 100% duty cycle, 1.34mm x 1.29mm, 9-Bump, 0.4mm-Pitch WLCSP package, 3MHz/6MHz selectable switching frequency, high-efficiency PFM operation, sleep mode, up to 96% synchronous operation efficiency, 10µs output voltage step response, etc.
The FAN5903 is a high-efficiency, low-noise, synchronous step-down DC-DC converter specifically designed to power 3G/3.5G and 4G RF Power Amplifiers (PAs) in handsets and other mobile applications. It features an integrated bypass FET that automatically switches on when battery voltage drops close to the desired output voltage, minimizing dropout loss.
The FAN5903UCX is designed for powering 3G/3.5G/4G RF Power Amplifiers (PAs) in handsets and other mobile applications.
The FAN5903 accepts an input voltage range from 2.7V to 5.5V.
The output voltage may be varied up to a maximum of 3.50V.
The bypass dropout is 60mV typical at 500mA.