描述 Description

The FAN5910 is a high efficiency, low noise, synchronous, step down, DC-DC converter optimized for powering Radio Frequency (RF) Power Amplifiers (PAs) in handsets and other mobile applications. Load currents up to 2.5A are allowed, which enables GSM / EDGE, 3G/3.5G, and 4G platforms under very poor VSWR conditions.
The output voltage may be dynamically adjusted from 0.40 V to 3.60 V, proportional to an analog input voltage VCON ranging from 0.16 V to 1.44 V, optimizing power?added efficiency. Fast transition times are achieved, allowing excellent inter?slot settling.
An integrated LDO is automatically enabled under heavy load conditions or when the battery voltage and voltage drop across the DC?DC PMOS device are within a set range of the desired output voltage. This LDO?assist feature supports heavy load currents under the most stringent battery and VSWR conditions while maintaining high efficiency, low dropout, and superior spectral performance.
The FAN5910 DC?DC operates in PWM Mode with a 2.9 MHz switching frequency and supports a single, small form?factor inductor ranging from 1.0 μH to 2.2 μH. In addition, PFM operation is allowed at low load currents for output voltages below 1.5 V to maximize efficiency.PFM operation can be disabled by setting MODE pin to LOW.
When output regulation is not required, the FAN5910 may be placed in Sleep Mode by setting VCON below 100 mV nominally.This ensures a very low IQ (

特性 Features

? Solution Size 2
? small solution size for phone
? 2.7 V to 5.5 V Input Voltage Range
? VOUT Range from 0.40 V to 3.60 V (VIN)
? Single, Small Form-Factor Inductor
? 29 m? Integrated LDO
? 100% Duty Cycle for Low-Dropout Operation
? Input Under-Voltage Lockout / Thermal Shutdown
? 1.61 mm x 1.61 mm, 16-Bump, 0.4 mm Pitch WLCSP
? 2.9 MHz PWM Mode
? Sleep Mode for ~50 μA Standby Current
? Forced PWM Mode
? Up to 95% Efficient Synchronous Operation in High Power Conditions
? 2.9 MHz PWM-Only Mode
? Auto PFM/PWM Mode
? 2.9 MHz PWM Operation at High Power and PFM Operation at Low Power and Low Output Voltage for Maximum Low Current Efficiency

應(yīng)用 Application

? Dynamic Supply Bias for Polar or Linear GSM / EDGE PAs and 3G/3.5G and 4G PAs
? Dynamic Supply Bias for GSM / EDGE Quad Band Amplifiers for Mobile Handsets and Data Cards
? Cellular phones, smart phones, tablets

簡介

FAN5910屬于集成電路（IC）的穩(wěn)壓器-DC-DC開關(guān)穩(wěn)壓器。由制造生產(chǎn)的FAN5910穩(wěn)壓器 - DC-DC 開關(guān)穩(wěn)壓器DC-DC 開關(guān)穩(wěn)壓器 PMIC（電源管理集成電路）產(chǎn)品族中的產(chǎn)品是元器件級設(shè)備，用于需要穩(wěn)定 DC 輸入電壓和/或?qū)⑵滢D(zhuǎn)換為不同幅度的輸出電壓的應(yīng)用。這些器件與稱為“控制器”PMIC 的類似產(chǎn)品的區(qū)別在于集成了主開關(guān)元件，設(shè)備提供的電力會通過該元件。