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參數資料
| 型號： | FAN2002 |
| 廠商： | Fairchild Semiconductor Corporation |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 1A High-Efficiency Step-Down DC-DC Converter |
| 中文描述： | 1A條高效率降壓型DC - DC轉換器 |
| 文件頁數： | 1/11頁 |
| 文件大小： | 329K |
| 代理商： | FAN2002 |
FAN2001/FAN2002 Rev. 1.0.2
1
www.fairchildsemi.com
April 2005
2005 Fairchild Semiconductor Corporation
F
FAN2001/FAN2002
1A 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 1A 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
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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 FAN2001/
FAN2002 is a high-efficiency, low-noise synchronous PWM cur-
rent mode and Pulse Skip (Power Save) mode DC-DC con-
verter. It can provide up to 1A 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 voltage 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 FAN2001/FAN2002 is
available in a 3x3mm 6-lead MLP package.
Typical Application
Figure 1. Typical Application
1
2
3
6
5
4
FB
PGND
SW
PV
IN
V
IN
EN
P1
(AGND)
L1
R2
R1
V
OUT
2 x 10
μ
F
3.3
μ
H
10
μ
F
10K
5K
1.2V (1A)
FAN2002
2 x 10
μ
F
10
μ
F
V
OUT
1.2V (1A)
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
FAN2001
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相關代理商/技術參數 |
參數描述 |
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| FAN2002MPX | 功能描述:直流/直流開關轉換器 Ang FG Adj 1A Hi eff Step-Down Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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| FAN2011_ACA3086B WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FAN2011EMPX | 功能描述:直流/直流開關轉換器 ANG FG 1.5a Syncr. Switcher RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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