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Linear LTM4613超低噪音8A开关电源解决方案

导读: Linear 公司的LTM4613是完整的超低噪音8A开关模式DC/DC电源,封装内包括开关控制器,功率FET,电感和所有的支持元件。输入电压范围从5V到36V,输出电压3.3V-15V,由单个外接电阻设定,输出电流8A,可并行输出。

  Linear 公司的LTM4613是完整的超低噪音8A开关模式DC/DC电源,封装内包括开关控制器,功率FET,电感和所有的支持元件。输入电压范围从5V到36V,输出电压3.3V-15V,由单个外接电阻设定,输出电流8A,可并行输出。主要用在通信和网络设备,工业和航空电子,RF系统。本文介绍了LTM4613主要特性,方框图,多种应用电路以及演示板电路图和材料清单。

  The LTM4613 is a complete, ultralow noise, 8A switch mode DC/DC power supply. Included in the package are the switching controller, power FETs, inductor and all support components. Operating over an input voltage range of 5V to 36V, the LTM4613 supports an output voltage range of 3.3V to 15V, set by a single external resistor. Only bulk input and output capacitors are needed to finish the design.

  High switching frequency and an adaptive on-time current mode architecture enables a very fast transient response to line and load changes without sacrificing stability.

  The onboard input filter and noise cancellation circuits achieve low noise coupling, thus effectively reducing the electromagnetic interference (EMI)。

  Furthermore, the DC/DC μModule. regulator can be synchronized with an external clock to reduce undesirable frequency harmonics and allow PolyPhase. operation for high load currents.

  The LTM4613 is offered in a space saving and thermally enhanced 15mm x15mm x4.32mm LGA package, which enables utilization of unused space on the bottom of PC boards for high density point-of-load regulation. The LTM4613 is Pb-free and RoHS compliant.

  LTM4613主要特性:

  Complete Low EMI Switch Mode Power Supply

  EN55022 Class B Compliant

  Wide Input Voltage Range: 5V to 36V

  8A Output Current

  3.3V to 15V Output Voltage Range

  Low Input and Output Referred Noise

  Output Voltage Tracking and Margining

  PLL Frequency Synchronization

  2% Maximum Total DC Error

  Power Good Tracks with Margining

  Current Foldback Protection

  Parallel/Current Sharing

  Ultrafast Transient Response

  Current Mode Control

  Programmable Soft-Start

  Output Overvoltage Protection

  –55℃ to 125℃ Operating Temperature Range (LTM4613MPV)

  Small Surface Mount Footprint, Low Profile (15mmx15mmx4.32mm) LGA Package

  LTM4613应用:

  Telecom and Networking Equipment

  Industrial and Avionic Equipment

  RF Systems

  

 

  图2.LTM4613应用电路图:22V-36VIN,12V/8A设计

 

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