LM3489EVAL

具有使能端引脚的滞后 PFET 降压控制器

LM3489EVAL

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概述

The LM3489 is a high efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, cost effective, switching buck regulator for a wide range of applications. The hysteretic control architecture provides for simple design without any control loop stability concerns using a wide variety of external components. The PFET architecture also allows for low component count as well as ultra-low dropout, and 100% duty cycle operation. Another benefit is high efficiency operation at light loads without an increase in output ripple. A dedicated Enable Pin (Enabled if left unconnected) provides a shutdown mode drawing only 7 µA.

特性
  • Wide 4.5V to 35V input range
  • 1.239V to VIN adjustable output range
  • High efficiency 93%
  • ±1.3% (± 2% over temp) internal reference
  • 100% duty cycle operation
  • Maximum operation frequency > 1MHz
  • Current limit protection
  • Dedicated enable pin (on if unconnected)
  • Shutdown mode draws on 7uA supply current
  • MSOP-8

Applications

  • Set-top Box
  • DSL/Cable Modem
  • PC/IA
  • Auto PC
  • TFT Monitor
  • Battery Powered Portable Applications
  • Distributed Power Systems
  • Always On Power
  • High Power LED Driver

 

交流/直流和直流/直流控制器(外部 FET)
LM3489 具有使能引脚的滞环 PFET 降压控制器 LM3489-Q1 具有使能引脚的汽车级 4.5V 至 35V、滞环非同步 PFET 降压控制器
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评估板

LM3489EVAL/NOPB — Hysteretic PFET Buck Controller with Enable Pin

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技术文档

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类型 标题 下载最新的英文版本 日期
* 用户指南 AN-1471 LM3489 Demonstration Board (Rev. A) 2013年 4月 25日
证书 LM3489EVAL/NOPB EU Declaration of Conformity (DoC) 2019年 1月 2日

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