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参数资料
| 型号： | FAN5904UC01X |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 1/23页 |
| 文件大小： | 0K |
| 描述： | IC CONV BUCK W/BYPASS 16-WLCSP |
| 标准包装： | 1 |
| 应用： | 转换器，3G，3.5G，4G RF 功率放大器 |
| 输入电压： | 2.7 V ~ 5.5 V |
| 输出数： | 1 |
| 输出电压： | 0.4 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-UFBGA，WLCSP |
| 供应商设备封装： | 16-WLCSP |
| 包装： | 标准包装 |
| 其它名称： | FAN5904UC01XFSDKR |
October 2013
FAN5904
Multi-Mode Buck Converter for GSM/EDGE, 3G/3.5G and 4G PAs
Features
Description
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2.7 V to 5.5 V Input Voltage Range
V OUT Range from 0.40 V to 3.50 V (or V IN )
Single 470 nH Small Form Factor Inductor
35 m ? Integrated Bypass FET
100% Duty Cycle for Low Dropout Operation
The FAN5904 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. In High-Power Mode, GSM Tx
power is enabled. In Low-Power Mode, up to 3.0 W is
supported, enabling up to 29 dBm output power for 3G/3.5G
and 4G platforms.
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Input Under-Voltage Lockout / Thermal Shutdown
1.71 mm x 1.71 mm, 16-Bump, 0.4 mm Pitch WLCSP
High Power PWM Mode
Up to 95% Efficient Synchronous Operation in
High P OUT Conditions
Output current up to 2.3 A
10 μs Output Voltage Step Response for Early
GSM Tx Power-Loop Settling
3MHz PWM Mode
Low Power Auto Mode
Up to 95% Efficient Synchronous Operation at
Higher P OUT Conditions
Output Current up to 1.2 A
10 μs Output Voltage Step Response for Early Tx
Power-Loop Settling
6 MHz PWM Operation at High Power and PFM
Operation at Low Power
Bypass Mode
The output voltage may be dynamically adjusted from
0.40 V to 3.50 V, proportional to an analog input voltage
VCON ranging from 0.16 V to 1.40 V, optimizing power-
added efficiency. Fast transition times of less than 10 μs are
achieved, allowing excellent inter-slot settling.
An integrated bypass FET is automatically enabled when
the battery voltage and voltage drop across the DC-DC
PMOS device are within a set voltage range of the desired
output voltage (V OUT = V BAT - V PMOS - V BP_TH ). This dynamic
bypass feature enables the FAN5904 to support heavy load
currents under the most stringent VSWR conditions while
maintaining high efficiency and superior spectral
performance. The bypass FET may also be enabled by
providing a VCON voltage nominally greater than or equal
to 1.5 V or by driving BPEN high.
The FAN5904 operates in PWM Mode with a 6 MHz
switching frequency in Low-Power Mode and at 3 MHz in
High-Power Mode, which limits high-frequency spur levels.
It uses a single, small form factor inductor of 470 nH. In
addition, PFM operation is allowed in Low-Power Mode to
improve efficiency at low load currents.
o Up to 3 A Load Current
Applications
? 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
Ordering Information
The FAN5904UC00X option allows PFM Mode only when
V OUT is less than 1 V, while the FAN5904UC01X permits
PFM Mode at higher voltages for applications that can
tolerate larger output ripple and that demand optimal low-to-
moderate load current efficiency.
Part Number
LPM Mode PFM
Output Voltage
Temperature
Range
Package
Packing
FAN5904UC00X
FAN5904UC01X
V OUT < 1 V
All V OUT
0.4 V to PVIN
1.71 mm x 1.71 mm, 16-Bump
-40°C to +85°C 0.4 mm Pitch, Wafer-Level
Chip-Scale Package (WLCSP)
Tape and Reel
? 2011 Fairchild Semiconductor Corporation
FAN5904 ? Rev. 3.0.7
www.fairchildsemi.com
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