FAN5904 [FAIRCHILD]
Multi-Mode Buck Converter for GSM/EDGE, 3G/3.5G and 4G PAs; 多模式降压转换器适用于GSM / EDGE ， 3G / 3.5G和4G功率放大器
| 型号： | FAN5904 |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | Multi-Mode Buck Converter for GSM/EDGE, 3G/3.5G and 4G PAs |
| 文件： | 总3页 (文件大小：1199K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
December 2011
FAN5904
Multi-Mode Buck Converter for GSM/EDGE, 3G/3.5G and 4G PAs
Description
Features
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 3.0W is
supported, enabling up to 29dBm output power for 3G/3.5G
and 4G platforms.
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.
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.
.
.
.
.
2.7V to 5.5V Input Voltage Range
VOUT Range from 0.40V to 3.50V (or VIN)
Single 470nH Small Form Factor Inductor
35mΩ Integrated Bypass FET
100% Duty Cycle for Low Dropout Operation
Input Under-Voltage Lockout / Thermal Shutdown
1.71mm x 1.71mm, 16-Bump, 0.40mm Pitch WLCSP
High Power PWM Mode
The output voltage may be dynamically adjusted from 0.40V
to 3.50V, proportional to an analog input voltage VCON
ranging from 0.16V to 1.40V, optimizing power-added
efficiency. Fast transition times of less than 10µs are
achieved, allowing excellent inter-slot settling.
o
Up to 95% Efficient Synchronous Operation in
High POUT Conditions
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 (VOUT = VBAT - VPMOS - VBP_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 1.5V or by driving BPEN high.
o
o
Output current up to 2.3A
10µs Output Voltage Step Response for Early
GSM Tx Power-Loop Settling
3MHz PWM Mode
o
o
.
.
Low Power Auto Mode
Up to 95% Efficient Synchronous Operation at
Higher POUT Conditions
o
o
Output Current up to 1.2A
The FAN5904 operates in PWM Mode with a 6MHz
switching frequency in Low-Power Mode and at 3MHz in
High-Power Mode, which limits high-frequency spur levels.
It uses a single, small form factor inductor of 470nH. In
addition, PFM operation is allowed in Low-Power Mode to
improve efficiency at low load currents.
10µs Output Voltage Step Response for Early Tx
Power-Loop Settling
o
6MHz PWM Operation at High Power and PFM
Operation at Low Power
Bypass Mode
o
Up to 3A Load Current
The FAN5904UC00X option allows PFM Mode only when
VOUT is less than 1V, 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.
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
Temperature
Range
Part Number LPM Mode PFM Output Voltage
Package
Packing
1.71mm x 1.71mm, 16-Bump
-40°C to +85°C 0.4mm Pitch, Wafer-Level
Chip-Scale Package (WLCSP)
FAN5904UC00X
FAN5904UC01X
VOUT < 1V
All VOUT
0.4V to PVIN
Tape and Reel
© 2011 Fairchild Semiconductor Corporation
FAN5904 • Rev. 3.0.5
www.fairchildsemi.com
Physical Dimensions
0.03 C
2X
F
E
A
B
D
0.40
(Ø0.20)
Cu Pad
A1
BALL A1
INDEX AREA
0.40
(Ø0.30) Solder
Mask Opening
0.03 C
2X
RECOMMENDED LAND PATTERN
(NSMD PAD TYPE)
TOP VIEW
0.06 C
0.625
0.547
0.378±0.018
0.208±0.021
E
0.05 C
C
SEATING
PLANE
D
SIDE VIEWS
NOTES:
A. NO JEDEC REGISTRATION APPLIES.
B. DIMENSIONS ARE IN MILLIMETERS.
0.005
C A B
Ø0.260±0.02
16X
0.40
C. DIMENSIONS AND TOLERANCE
PER ASME Y14.5M, 1994.
D
C
B
A
D. DATUM C IS DEFINED BY THE SPHERICAL
CROWNS OF THE BALLS.
(Y) ±0.018
F
0.40
E. PACKAGE NOMINAL HEIGHT IS 586 MICRONS
±39 MICRONS (547-625 MICRONS).
2
3
4
1
(X) ±0.018
F. FOR DIMENSIONS D, E, X, AND Y SEE
PRODUCT DATASHEET.
BOTTOM VIEW
G. DRAWING FILNAME: MKT-UC016AArev2.
Product
D
E
X
Y
Unit
mm
mm
FAN5904UC00X
FAN5904UC01X
1.710 ±0.030
1.710 ±0.030
1.710 ±0.030
1.710 ±0.030
0.255
0.255
0.255
0.255
Figure 60. 1.71x1.71mm Square, 16 Bumps, 0.4mm Pitch, WLCSP
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without
notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most
recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty
therein, which covers Fairchild products.
Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/packaging/
© 2011 Fairchild Semiconductor Corporation
FAN5904 • Rev. 3.0.5
www.fairchildsemi.com
22
© 2011 Fairchild Semiconductor Corporation
FAN5904 • Rev. 3.0.5
www.fairchildsemi.com
23
相关型号：
FAN5904UC00X
Switching Regulator, Current-mode, 3A, 6000kHz Switching Freq-Max, PBGA16, 1.71 X 1.71 MM, 0.40 MM PITCH, WLCSP-16
FAIRCHILD
FAN5904UC01X
Switching Regulator, Current-mode, 3A, 6000kHz Switching Freq-Max, PBGA16, 1.71 X 1.71 MM, 0.40 MM PITCH, WLCSP-16
FAIRCHILD
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