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MAX1837

MAX1837

24V内置开关、100%占空比、降压型转换器

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概述

说明

The MAX1836/MAX1837 high-efficiency step-down converters provide a preset 3.3V or 5V output voltage from supply voltages as high as 24V. Using external feedback resistors, the output voltage can be adjusted from 1.25V to VIN. An internal current-limited switching MOSFET delivers load currents up to 125mA (MAX1836) or 250mA (MAX1837).

The unique current-limited control scheme, operating with duty cycles up to 100%, minimizes the dropout voltage (120mV at 100mA). Additionally, this control scheme reduces supply current under light loads to 12µA. High switching frequencies allow the use of tiny surface-mount inductors and output capacitors.

The MAX1836/MAX1837 step-down converters with internal switching MOSFETs are available in 6-pin SOT23 and 3mm x 3mm TDFN packages, making them ideal for low-cost, low-power, space-sensitive applications. For increased output drive capability, use the MAX1776 step-down converter that uses an internal 24V switch to deliver up to 500mA. For even higher currents, use the MAX1626/MAX1627 step-down controllers that drive an external P-channel MOSFET to deliver up to 20W.
MAX1836、MAX1837：典型工作电路 MAX1836、MAX1837：典型工作电路 放大+

关键特性

  • 4.5V to 24V Input Voltage Range
  • Preset 3.3V or 5V Output
  • Adjustable Output from 1.25V to VIN
  • Output Currents Up to 125mA (MAX1836) or 250mA (MAX1837)
  • Efficiency Over 90%
  • 12µA Quiescent Current
  • 3µA Shutdown Current
  • 100% Maximum Duty Cycle for Low Dropout
  • Small 6-Pin SOT23 and TDFN Packages

应用

  • 4mA至20mA环路供电
  • 9V电池系统
  • 备用电源
  • 分布式供电系统
  • 手持式设备
  • 工业控制电源
  • 笔记本电脑

参数规格


Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

设计资源


MAX1837EVKIT: MAX1836、MAX1837评估板

技术资料

用户指南 5861 EE-SIM Design and Simulation Environment User Guide
设计指南 2031 DC to DC Buck Converter Tutorial
参考原理图 960 从USB端口为便携式设备提供+5V和+3.3V电源

工具和模型

  • EE-Sim: MAX1837 设计和仿真
  • MAX1837 SIMPLIS Schematic

    •

    质量与环境

    产品可靠性报告: MAX1837.pdf 
    型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

    备注： 通过技术手段对故障率进行汇总，并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

    质量管理体系 >
    环境管理体系 >

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    工具和模型

    技术文档

    类型 编号 标题
    用户指南 5861 EE-SIM Design and Simulation Environment User Guide
    设计指南 2031 DC to DC Buck Converter Tutorial
    参考原理图 960 从USB端口为便携式设备提供+5V和+3.3V电源

    参考设计

    类型 编号 标题
    参考电路960从USB端口为便携式设备提供+5V和+3.3V电源
    评估板2515MAX1837EVKIT MAX1836、MAX1837评估板