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DO3308224 PDF预览

DO3308224

更新时间: 2024-11-11 12:34:19
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 461K
描述
1.0 A, Adjustable Output Voltage, Step-Down Switching Regulator

DO3308224 数据手册

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LM2575, NCV2575  
1.0 A, Adjustable Output  
Voltage, Step-Down  
Switching Regulator  
The LM2575 series of regulators are monolithic integrated circuits  
ideally suited for easy and convenient design of a stepdown  
switching regulator (buck converter). All circuits of this series are  
capable of driving a 1.0 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  
TO220  
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 LM2575 are offered by several  
different inductor manufacturers.  
Since the LM2575 converter is a switchmode power supply, its  
efficiency is significantly higher in comparison with popular  
threeterminal linear regulators, especially with higher input voltages.  
In many cases, the power dissipated by the LM2575 regulator is so  
low, that no heatsink is required or its size could be reduced  
dramatically.  
The LM2575 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 cyclebycycle current limiting, as well as  
thermal shutdown for full protection under fault conditions.  
TV SUFFIX  
CASE 314B  
1
5
Heatsink surface connected to Pin 3  
TO220  
T SUFFIX  
CASE 314D  
1
5
Pin 1.  
V
in  
2. Output  
Features  
3. Ground  
4. Feedback  
5. ON/OFF  
3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output Versions  
Adjustable Version Output Voltage Range of 1.23 V to 37 V 4%  
Maximum Over Line and Load Conditions  
Guaranteed 1.0 A Output Current  
Wide Input Voltage Range: 4.75 V to 40 V  
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  
PbFree Packages are Available*  
2
D PAK  
D2T SUFFIX  
CASE 936A  
1
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 25 of this data sheet.  
Applications  
Simple and HighEfficiency StepDown (Buck) Regulators  
Efficient PreRegulator for Linear Regulators  
OnCard Switching Regulators  
DEVICE MARKING INFORMATION  
See general marking information in the device marking  
section on page 26 of this data sheet.  
Positive to Negative Converters (BuckBoost)  
Negative StepUp Converters  
Power Supply for Battery Chargers  
*For additional information on our PbFree strategy and soldering details, please  
download the ON Semiconductor Soldering and Mounting Techniques  
Reference Manual, SOLDERRM/D.  
©
Semiconductor Components Industries, LLC, 2009  
1
Publication Order Number:  
June, 2009 Rev. 11  
LM2575/D  

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