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參數(shù)資料
| 型號(hào)： | FAN5308 |
| 廠商： | Fairchild Semiconductor Corporation |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 800mA High-Efficiency Step-Down DC-DC Converter |
| 中文描述： | 800mA的高效率降壓型DC - DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 1/11頁 |
| 文件大小： | 409K |
| 代理商： | FAN5308 |
FAN5308 Rev. 1.0.1
1
www.fairchildsemi.com
April 2005
2005 Fairchild Semiconductor Corporation
F
FAN5308
800mA High-Efficiency Step-Down DC-DC Converter
Features
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96% Efficiency, Synchronous Operation
Adjustable Output Voltage Options from 0.8V to V
2.5V to 5.5V Input Voltage Range
Up to 800mA Output Current
Fixed Frequency 1.3MHz PWM Operation
High Efficiency Power Save Mode
100% Duty Cycle Low Dropout Operation
Soft Start
Output Over-Voltage Protection
Dynamic Output Voltage Positioning
25
μ
A Quiescent Current
Thermal Shutdown and Short Circuit Protection
Pb-Free 3x3mm 6-Lead MLP Package
■
IN
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Applications
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Pocket PCs, PDAs
Cell Phones
Battery-Powered Portable Devices
Digital Cameras
Hard Disk Drives
Set-Top-Boxes
Point-of-Load Power
Notebook Computers
Communications Equipment
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Description
Designed for use in battery-powered applications, the FAN5308
is a high-efficiency, low-noise synchronous PWM current mode
and Pulse Skip (Power Save) mode DC-DC converter. It can
provide up to 800mA of output current over a wide input range
from 2.5V to 5.5V. The output voltage can be externally adjusted
over a wide range of 0.8V to 5.5V by means of an external volt-
age divider.
At moderate and light loads, pulse skipping modulation is used.
Dynamic voltage positioning is applied, and the output voltage is
shifted 0.8% above nominal value for increased headroom dur-
ing load transients. At higher loads the system automatically
switches over to current mode PWM control, operating at 1.3
MHz. A current mode control loop with fast transient response
ensures excellent line and load regulation. To achieve high effi-
ciency and ensure long battery life, the quiescent current is
reduced to 25μA in Power Save mode, and the supply current
drops below 1μA in shut-down mode. The FAN5308 is available
in a 3x3mm 6-lead MLP package.
Typical Application
Figure 1. Typical Application
2 x 10
μ
F
10
μ
F
V
OUT
1.2V (800mA)
EN
SW
C
IN
C
1
2
3
6
5
4
FB
PGND
V
IN
NC
P1
(AGND)
3.3
μ
H
R1
10K
5K
R2
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FAN5308_07 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:800mA High-Efficiency Step-Down DC-DC Converter |
| FAN5308MPX | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 SYSTEM_POWER RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| FAN5308MPX | 制造商:Fairchild Semiconductor Corporation 功能描述:IC DC/DC CONVERTER ((NW)) 制造商:Fairchild Semiconductor Corporation 功能描述:IC, STEP-DOWN DC/DC CONVERTER, MLP-6 |
| FAN5309M_ABB3086B WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FAN5309MPX | 制造商:Fairchild Semiconductor Corporation 功能描述: |
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