应用与设计

LTC7149 12V 输入至 –5V 输出 (在 1MHz 工作)

详情介绍

概览

产品详情

High Efficiency Dual 8.5V/3.3V Step-Down Converter

LTC3890 是一款高性能、双通道、降压型开关稳压器 DC/DC 控制器,用于驱动全 N 沟道同步功率 MOSFET 级。该器件运用了一种恒定频率电流模式架构,因而可提供一个高达 850kHz 的可锁相频率。通过使两个控制器输出级异相运作,最大限度地降低了功率损耗和因输入电容器的 ESR 所導致的电源噪声。


Efficiency and Power Loss  vs Output Current

工具及仿真模型

LTspice

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.

LTspice