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LM2576_06

更新时间： 2024-11-25 04:59:39
品牌 Logo 应用领域
安森美 - ONSEMI 稳压器开关
页数 文件大小 规格书
28页 276K
描述
3.0 A, 15 V, Step−Down Switching Regulator

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LM2576_06 数据手册

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LM2576  
3.0 A, 15 V, Step−Down  
Switching Regulator  
The LM2576 series of regulators are monolithic integrated circuits  
ideally suited for easy and convenient design of a step−down  
switching regulator (buck converter). All circuits of this series are  
capable of driving a 3.0 A load with excellent line and load regulation.  
These devices are available in fixed output voltages of 3.3 V, 5.0 V,  
12 V, 15 V, and an adjustable output version.  
http://onsemi.com  
These regulators were designed to minimize the number of external  
components to simplify the power supply design. Standard series of  
inductors optimized for use with the LM2576 are offered by several  
different inductor manufacturers.  
TO−220  
TV SUFFIX  
CASE 314B  
1
5
Since the LM2576 converter is a switch−mode power supply, its  
efficiency is significantly higher in comparison with popular  
three−terminal linear regulators, especially with higher input voltages.  
In many cases, the power dissipated is so low that no heatsink is  
required or its size could be reduced dramatically.  
Heatsink surface connected to Pin 3  
A standard series of inductors optimized for use with the LM2576  
are available from several different manufacturers. This feature  
greatly simplifies the design of switch−mode power supplies.  
The LM2576 features include a guaranteed 4% tolerance on output  
voltage within specified input voltages and output load conditions, and  
10% on the oscillator frequency ( 2% over 0°C to 125°C). External  
shutdown is included, featuring 80 mA (typical) standby current. The  
output switch includes cycle−by−cycle current limiting, as well as  
thermal shutdown for full protection under fault conditions.  
TO−220  
T SUFFIX  
CASE 314D  
1
5
Pin 1.  
V
in  
2. Output  
3. Ground  
4. Feedback  
5. ON/OFF  
Features  
• 3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output Versions  
• Adjustable Version Output Voltage Range, 1.23 to 37 V 4%  
Maximum Over Line and Load Conditions  
• Guaranteed 3.0 A Output Current  
2
D PAK  
D2T SUFFIX  
CASE 936A  
• Wide Input Voltage Range  
1
• Requires Only 4 External Components  
• 52 kHz Fixed Frequency Internal Oscillator  
• TTL Shutdown Capability, Low Power Standby Mode  
• High Efficiency  
• Uses Readily Available Standard Inductors  
• Thermal Shutdown and Current Limit Protection  
• Moisture Sensitivity Level (MSL) Equals 1  
• Pb−Free Packages are Available  
5
Heatsink surface (shown as terminal 6 in  
case outline drawing) is connected to Pin 3  
ORDERING INFORMATION  
See detailed ordering and shipping information in the package  
dimensions section on page 24 of this data sheet.  
DEVICE MARKING INFORMATION  
See general marking information in the device marking  
section on page 25 of this data sheet.  
Applications  
• Simple High−Efficiency Step−Down (Buck) Regulator  
• Efficient Pre−Regulator for Linear Regulators  
• On−Card Switching Regulators  
• Positive to Negative Converter (Buck−Boost)  
• Negative Step−Up Converters  
• Power Supply for Battery Chargers  
©
Semiconductor Components Industries, LLC, 2006  
1
Publication Order Number:  
January, 2006 − Rev. 8  
LM2576/D  
1234567...28

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