- 完整的 15A 开关模式电源
- 宽输入电压范围：4.5V 至 20V
- 0.6V 至 5V 输出范围
- ±1.5% 总 DC 输出误差
- 电流模式控制 / 快速瞬态响应
- 并联均流 (高达 60A)
- 可选的脉冲跳跃或突发模式 (Burst Mode®) 操作
- 软起动 / 电压跟踪
- 效率高达 93% (12VIN、3.3VOUT)
- 小占板面积的表面贴装型扁平 15mm x 15mm x 4.32mm LGA 和 15mm x 15mm x 4.92mm BGA 封装
LTM®4627 是一款完整的 15A 输出、高效率、开关模式 DC/DC 电源。封装中内置了开关控制器、功率 FET、电感器和补偿元件。LTM4627 可在一个 4.5V 至 20V 的输入电压范围内运作，支持一个 0.6V 至 5V 的输出电压范围 (由单个外部电阻器来设定)。仅需少量的输入和输出电容器。
电流模式操作实现了多达 4 个 LTM4627 稳压器的精准均流，以获得 60A 输出。高开关频率和一种电流模式架构的运用提供了针对电压和负载变化的快速瞬态响应，而并未牺牲稳定性。该器件支持频率同步、多相 / 均流运作、突发模式操作以及用于电源轨排序的输出电压跟踪功能。
LTM4627 采用耐热性能增强型 15mm x 15mm x 4.32mm LGA 和 15mm x 15mm x 4.92mm BGA 封装。LTM4627 具有符合 SnPb (BGA) 或 RoHS 标准的引脚涂层。
- ATCA 和存储卡
Demonstration circuit 1669 features the LTM4627EV μModule regulator, a high‐performance high efficiency step‐down regulator. The LTM4627EV has an operating input voltage range of 4.5V to 20V and is able to provide an output current of up to 15A. The output voltage is programmable from 0.6V to 5V and can be remotely sensed with the internal optional differential remote sensing amplifier. The LTM4627EV is a complete DC‐DC point of load regulator in a thermally enhanced 15mm x 15mm x 4.32mm LGA package requiring only a few input and output capacitors. This regulator is internally compensated and employs constant frequency current mode architecture, enabling a fast transient response and stable control loop over a wide range of output capacitance. It supports frequency synchronization and Burst Mode® operation for increased light load efficiency. Output voltage tracking is also available through the TRACK/SS pin for supply rail sequencing. The LTM4627 datasheet must be read in conjunction with this demo manual for working on or modifying demo circuit 1669.
Demonstration circuit 1668B-C is a PolyPhase® power supply featuring four LTM4627 high efficiency synchronous buck μModule® regulators. The DC1668B-C input voltage range is between 4.5V to 20V with a jumper programmable output voltage from 0.6V to 3.3V. The demo circuit can deliver up to 50A of load with excellent current-sharing. Current derating may be necessary under certain operating conditions.
Demonstration circuit 1668B-A is a PolyPhase® power supply featuring two LTM4627 high efficiency synchronous buck μModule® regulators. The DC1668B-A input voltage range is between 4.5V to 20V with a jumper programmable output voltage from 0.6V to 3.3V. The demo circuit can deliver up to 30A of load with excellent current-sharing. Current derating may be necessary under certain operating conditions.
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.
Models for the following parts are available in LTspice:
LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.
To open the project file for this circuit:
Step 1: Download and install LTpowerCAD on your computer.
Step 2: Click on the link(s) in the section below to download part-specific project files.
Step 3: If the project file doesn't run, right-click the link and select "Save Target As." Then start the LTpowerCAD tool and open the project file by selecing "Open Project" from the "File" menu.