LM2576: 3.0 A, 52 kHz Buck Switching Regulator

The LM2576 Buck Switching 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. The Buck Switching Regulator is 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. 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. 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 0C to 125C). External shutdown is included, featuring 80 uA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions

技术特性
  • 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
  • Wide Input Voltage Range
  • 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
应用
  • Simple and High-Efficiency Step-Down (Buck) Regulators
  • Efficient Pre-Regulator for Linear Regulators
  • On-Card Switching Regulators
  • Positive to Negative Converters (Buck-Boost)
  • Negative Step-Up Converters
  • Power Supply for Battery Chargers
封装图 PACKAGE DIMENSIONS

LM2576封装图
订购信息 Ordering Information
产品 状况 Compliance 具体说明 封装 MSL* 容器 预算价格 (1千个数量的单价）
类型 外形 类型 数量
LM2576D2T-005G Active
Pb-free
Halide free
3.0 A, 52 kHz Buck Switching Regulator, 3.0 A, 5.0 V, 52 kHz D2PAK-5 936A-02 1 Tube 50 $1.9066
LM2576D2T-012G Last Shipments 
Pb-free
Halide free
3.0 A, 52 kHz Buck Switching Regulator, 3.0 A, 12 V, 52 kHz D2PAK-5 936A-02 1 Tube 50  
LM2576D2T-15G Active
Pb-free
Halide free
3.0 A, 52 kHz Buck Switching Regulator, 3.0 A, 15.0 V, 52 kHz D2PAK-5 936A-02 1 Tube 50 $1.9066
LM2576D2T-3.3G Last Shipments 
Pb-free
Halide free
3.0 A, 52 kHz Buck Switching Regulator, 3.0 A, 3.3 V, 52 kHz D2PAK-5 936A-02 1 Tube 50  
LM2576D2T-ADJG Active
Pb-free
Halide free
3.0 A, 52 kHz Buck Switching Regulator, 3.0 A, Adjustable 1.23-37 V, 52 kHz D2PAK-5 936A-02 1 Tube 50 $1.8666
LM2576D2T-ADJR4G Active
Pb-free
Halide free
3.0 A, 52 kHz Buck Switching Regulator, 3.0 A, Adjustable 1.23-37 V, 52 kHz D2PAK-5 936A-02 1 Tape and Reel 800 $1.8666
LM2576D2TR4-012G Active
Pb-free
Halide free
3.0 A, 52 kHz Buck Switching Regulator, 3.0 A, 12 V, 52 kHz D2PAK-5 936A-02 1 Tape and Reel 800 $1.9066
LM2576D2TR4-3.3G Active
Pb-free
Halide free
3.0 A, 52 kHz Buck Switching Regulator, 3.0 A, 3.3 V, 52 kHz D2PAK-5 936A-02 1 Tape and Reel 800 $1.9066
LM2576D2TR4-5G Active
Pb-free
Halide free
3.0 A, 52 kHz Buck Switching Regulator, 3.0 A, 5.0 V, 52 kHz D2PAK-5 936A-02 1 Tape and Reel 800 $1.9066
LM2576T-005G Active
Pb-free
Halide free
3.0 A, 52 kHz Buck Switching Regulator, 3.0 A, 5.0 V, 52 kHz TO-220-5 314D-04 Tube 50 $2.1599
LM2576T-012G Active
Pb-free
Halide free
3.0 A, 52 kHz Buck Switching Regulator, 3.0 A, 12 V, 52 kHz TO-220-5 314D-04 Tube 50 $2.1599
LM2576T-15G Active
Pb-free
Halide free
3.0 A, 52 kHz Buck Switching Regulator, 3.0 A, 15.0 V, 52 kHz TO-220-5 314D-04 Tube 50 $2.1599
LM2576T-3.3G Active
Pb-free
Halide free
3.0 A, 52 kHz Buck Switching Regulator, 3.0 A, 3.3 V, 52 kHz TO-220-5 314D-04 Tube 50 $2.1599
LM2576T-ADJG Active
Pb-free
Halide free
3.0 A, 52 kHz Buck Switching Regulator, 3.0 A, Adjustable 1.23-37 V, 52 kHz TO-220-5 314D-04 Tube 50 $1.8666
LM2576TV-012G Active
Pb-free
Halide free
3.0 A, 52 kHz Buck Switching Regulator, 3.0 A, 12 V, 52 kHz TO-220-5 314B-05 Tube 50 $2.1599
LM2576TV-015G Active
Pb-free
Halide free
3.0 A, 52 kHz Buck Switching Regulator, 3.0 A, 15.0 V, 52 kHz TO-220-5 314B-05 Tube 50 $2.1599
LM2576TV-3.3G Active
Pb-free
Halide free
3.0 A, 52 kHz Buck Switching Regulator, 3.0 A, 3.3 V, 52 kHz TO-220-5 314B-05 Tube 50 $2.1599
LM2576TV-5G Active
Pb-free
Halide free
3.0 A, 52 kHz Buck Switching Regulator, 3.0 A, 5.0 V, 52 kHz TO-220-5 314B-05 Tube 50 $2.1599
LM2576TV-ADJG Active
Pb-free
Halide free
3.0 A, 52 kHz Buck Switching Regulator, 3.0 A, Adjustable 1.23-37 V, 52 kHz TO-220-5 314B-05 Tube 50 $1.8666
数据资料DataSheet下载
概述 文档编号/大小 版本
3.0 A, 52 kHz Buck Switching Regulator LM2576/D (94.0kB) 2
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