Datasheet4U Logo Datasheet4U.com

FAN5902 Datasheet 800ma Buck Converter

Manufacturer: Fairchild (now onsemi)

Overview: FAN5902 — 800mA Buck Converter for 3G RFPAs .. May 2009 FAN5902 800mA Buck Converter for 3G.

General Description

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.

Key Features

  • 92% Efficient Synchronous Operation 2.7V to 5.5V Input Voltage Range VOUT Range from 0.4V to 3.4V (or VIN) Up to 800mA Output Current 20µs Step Response 30µs Bypass Transition Time 50mΩ Integrated Bypass FET with Controlled Slew Rate for Low Battery Voltage Operation 6MHz PWM Operation Allows 470nH Small Form Factor Inductor 100% Duty Cycle for Low Dropout Operation Thermal Shutdown Input Under-Voltage Lockout 12-Lead.

More Datasheets from Fairchild (now onsemi)

Part Number Description
FAN5904 Multi-Mode Buck Converter
FAN5009 Dual Bootstrapped 12V MOSFET Driver
FAN501 Offline DCM / CCM Flyback PWM Controller
FAN5018B 6-Bit VID Controller 2-4 Phase VR10.X Controller
FAN5019 6-Bit VID Controller 2-4 Phase VRM10.X Controller
FAN5019B 6-Bit VID Controller 2-4 Phase VR10.X Controller
FAN501A Offline DCM / CCM Flyback PWM Controller
FAN5026 Dual DDR/Dual-output PWM Controller
FAN5029 8-Bit Programmable 2- to 5-Phase Synchronous Buck Controller
FAN5031 Synchronous Buck Controller

FAN5902 Distributor