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参数资料
| 型号： | FAN5355MP07X |
| 厂商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.8 A SWITCHING CONTROLLER, 3350 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | 3 X 3 MM, GREEN, MO-229WEED-5, MLP-10 |
| 文件页数： | 1/27页 |
| 文件大小： | 1995K |
| 代理商： | FAN5355MP07X |
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March 2008
2008 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5355 Rev. 1.0.4
FA
N
5
355
—
1A
/
0.8A
,3M
hz.
D
igit
a
lly
Prog
rammabl
e
TinyB
u
ck
TM
Regulator
FAN5355
1A / 0.8A, 3MHz Digitally Programmable TinyBuckTM Regulator
Features
91% Efficiency at 3MHz
800mA or 1A Output Current
(1)
2.7V to 5.5V Input Voltage Range
6 or 7-bit VOUT Programmable from 0.75 to 1.975V
3MHz Fixed-Frequency Operation
Excellent Load and Line Transient Response
Small Size, 1
μH Inductor Solution
±2% PWM DC Voltage Accuracy
35ns Minimum On-Time
High-Efficiency, Low-Ripple, Light-Load PFM
Smooth Transition between PWM and PFM
37
μA Operating PFM Quiescent Current
Software Selectable 25kHz Minimum PFM Frequency
Prevents Audible Noise in PFM Mode
I
2C-Compatible Interface up to 3.4Mbps
Pin-Selectable or I
2C Programmable Output Voltage
On-the-Fly External Clock Synchronization
10-lead MLP (3 x 3mm) or 12-bump CSP Packages
Applications
SmartReflex-Compliant Power Supply
Split Supply DSPs and
μP Solutions OMAP, XSCALE
Cell Phones, Smart Phones, PDAs, Digital Cameras, and
Portable Media Players
Micro DC-DC Converter Modules
Handset Graphic Processors (NVIDIA
, ATI)
Description
The FAN5355 device is a high-frequency, ultra-fast transient
response,
synchronous
step-down
DC-DC
converter
optimized for low-power applications using small, low-cost
inductors and capacitors. The FAN5355 supports up to
800mA or 1A
(1) load current.
The device is ideal for mobile phones and similar portable
applications powered by a single-cell Lithium-Ion battery. With
an output voltage range adjustable via I
2C interface from
0.75V to 1.975V, the device supports low-voltage DSPs and
processors, core power supplies in smart phones, PDAs, and
handheld computers.
The FAN5355 operates at 3MHz (nominal) fixed switching
frequency using either its internal oscillator or external SYNC
frequency.
During light-load conditions, the regulator includes a PFM
mode to enhance light-load efficiency. The regulator
transitions smoothly between PWM and PFM modes with no
glitches on VOUT. Normal PFM (NPFM) mode offers the lowest
quiescent current, at the expense of setpoint accuracy.
Enhanced PFM (EPFM) mode features higher accuracy, as
well as a 25kHz minimum PFM frequency, designed to
prevent the regulator from operating in the audible range. In
shutdown, the current consumption is reduced to less than
2
μA, using software shutdown (EN = 1 with EN_DCDC = 0),
and less than 200nA in hardware shutdown (EN = 0).
The serial interface is compatible with Fast/Standard and
High-Speed mode I
2C specifications, allowing transfers up to
3.4Mbps. This interface is used for dynamic voltage scaling
with 12.5mV voltage steps, for reprogramming the mode of
operation (PFM or Forced PWM), or to disable/enable the
output voltage.
The chip's advanced protection features include short-circuit
protection and current and temperature limits. During a
sustained over-current event, the IC shuts down and restarts
after a delay to reduce average power dissipation into a fault.
During start-up, the IC controls the output slew rate to
minimize input current and output overshoot at the end of soft-
start. The IC maintains a consistent soft-start ramp, regardless
of output load during start-up.
The FAN5355 is available in 10-lead MLP (3x3mm) and
12-bump CSP packages.
I
2C is a trademark of Philips Corporation.
SmartReflex and OMAP are trademarks of Texas Instruments.
XSCALE is a trademark of Intel Corporation.
NVIDIA is a registered trademark of NVIDIA Corporation.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| FAN5355UC00X | 功能描述:直流/直流开关转换器 800mA 3MHz Digital Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| FAN5355UC02X | 功能描述:直流/直流开关转换器 800mA 3MHz Digital Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| FAN5355UC03X | 功能描述:直流/直流开关转换器 1A/0.8A 3MHz Digital Prog DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| FAN5355UC06X | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:1A / 0.8A, 3MHz Digitally Programmable TinyBuckTM Regulator |
| FAN5355UC07X | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:1A / 0.8A, 3MHz Digitally Programmable TinyBuckTM Regulator |
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