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FAN2011

更新时间： 2024-10-01 22:40:51
品牌 Logo 应用领域
飞兆/仙童 - FAIRCHILD 稳压器
页数 文件大小 规格书
10页 242K
描述
1.5A Low Voltage Current Mode Synchronous PWM Buck Regulator

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中文翻译

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FAN2011 数据手册

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November 2004  
FAN2011/FAN2012  
1.5A Low Voltage Current Mode Synchronous PWM Buck  
Regulator  
Features  
Description  
ꢀ 95% Efficiency, Synchronous Operation  
ꢀ Adjustable Output Voltage from 0.8V to V  
ꢀ 4.5V to 5.5V Input Voltage Range  
ꢀ Up to 1.5A Output Current  
The FAN2011/FAN2012 is a high-efficiency, low-noise synchro-  
nous PWM current mode DC-DC converter, designed for low  
voltage applications. It provides up to 1.5A continuous load cur-  
rent from the 4.5V to 5.5V input. The output voltage is adjust-  
IN  
able over a wide range of 0.8V to V by means of an external  
IN  
ꢀ Fixed Frequency 1.3 MHz PWM Operation  
ꢀ 100% Duty Cycle Low Dropout Operation  
ꢀ Soft Start  
voltage divider.  
The FAN2011 is always on, while the FAN2012 has an “Enable  
Input,” and the device can be put in the shutdown mode, in  
which the ground current falls below 1µA.  
ꢀ Excellent Load Transient Response  
ꢀ 3x3mm 6-lead MLP Package  
A current mode control loop with a fast transient response  
ensures excellent line and load regulation. The fixed 1.3MHz  
switching frequency enables the user to choose a small, inex-  
pensive external inductor and capacitor. Filtering is also easily  
accomplished with very small components.  
Applications  
ꢀ Hard Disk Drive  
ꢀ Set Top Box  
Protection features include input under-voltage lockout, short  
circuit protection and thermal shutdown. Soft-start limits in-rush  
current during start-up conditions.  
ꢀ Point of Load Power  
ꢀ Notebook Computers  
ꢀ Communications Equipment  
The device is available in a 3x3mm 6-lead MLP package, mak-  
ing it possible to build a 1.5A complete DC/DC converter in a  
tiny space on the PCB.  
Typical Application  
EN  
FB  
FB  
1
2
3
6
5
4
NC  
1
2
3
6
5
4
10KΩ  
10KΩ  
R2  
+5V  
PGND  
SW  
V
R2  
P1  
(AGND)  
+5V  
IN  
V
PGND  
P1  
(AGND)  
IN  
R1  
OUT  
R1  
OUT  
L1  
V
L1  
PV  
V
SW  
PV  
IN  
IN  
3.3µH  
3.3µH  
10µF  
10µF  
4 x 10µF  
4 x 10µF  
FAN2011  
FAN2012  
Figure 1.Typical Application  
FAN2011/FAN2012 Rev. 1.0.2  
1
www.fairchildsemi.com  
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