English 日本語
产品 >
应用 >
设计资源 >
支持 >
订购产品 >
关于我们 >
Maxim Integrated
›
产品
›
电源管理
›
›
MAX1921

MAX1921

低电压、400mA、降压型DC-DC转换器，SOT23封装

下载数据手册
订阅

点击查看特定型号的库存状况。

概述

说明

MAX1920/MAX1921降压型转换器可输出最低1.25V的电压，同时提供超过400mA的电流。这两个转换器使用独特的限流控制技术可获得高于90%的效率。这两个器件具有超低静态工作电流(50µA)、高达1.2MHz (最高)的开关频率，允许选用小尺寸、低成本的外部元件。这些特点使MAX1920/MAX1921在空间受限应用中成为线性稳压器出色的、高效替代品。

内置同步整流极大地改善了效率，无需使用传统降压型转换器中所必需的外部肖特基二极管。两个器件还包括内部数字软启动，用于限制启动过程的输入电流、降低对输入电容的要求。

MAX1920提供可调输出电压(1.25至4V)。MAX1921提供预置的输出电压(参考完整数据资料中的Selector Guide)。两个器件均采用节省空间的、6引脚SOT23封装。
MAX1920、MAX1921：典型工作电路 MAX1920、MAX1921：典型工作电路 放大+

关键特性

  • 保证400mA输出电流
  • 内置同步整流，效率>90%
  • 小巧的6引脚SOT23封装
  • 高达1.2MHz开关频率，小尺寸的外部元件
  • 50µA静态工作电流
  • 0.1µA逻辑控制关断电流
  • 2V至5.5V输入电压范围
  • 固定1.5V、1.8V、2.5V、3V和3.3V输出电压(MAX1921)
  • 可调输出电压(MAX1920)
  • ±1.5%初始精度
  • 软启动限制启动电流

    • 应用

    • 电池供电应用
    • CDMA功放电源
    • 下一代无线手机
    • PDA、掌上电脑与手持终端

    参数规格

    Part NumberVIN
    (V)    		VIN
    (V)    		VOUT1
    (V)    		VOUT1
    (V)    		Preset VOUT
    (V)    		Output Adjust. MethodIOUT1
    (A)    		Switch TypeSynchronous SwitchingDC-DC OutputsOper. Freq.
    (kHz)    		Package/PinsBudgetary
    Price
    minmaxminmaxmaxSee Notes
    MAX1920 25.51.254-Resistor0.4InternalYes11200
    SOT23/6
    TDFN/6
    		$1.42 @1k
    MAX1921 1.53.3
    1.5
    1.8
    2.5
    3
    3.3
    Preset
    Resistor
    SOT23/6
    查看所有Step-Down Switching Regulators (404)
    Pricing Notes:
    价格仅供参考，用于同类产品的比较。所提供报价为美元，需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题，请参考：价格与供货网站或与指定代理商联系。

    设计资源


    MAX1921EVKIT: MAX1920、MAX1921评估板

    技术资料

    应用笔记 3741 用于低压系统的模拟IC

    质量和环境数据

    产品可靠性报告: MAX1921.pdf 
    无铅封装的锡（Sn）晶须报告

    质量与环境

    型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

    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 >

    订购

     
    Status:
    Package:
    Temperature:

    相关资料

    新产品


    MAX25201
    36V Automotive Low-IQ 200kHz to 2.2MHz Synchronous Boost Controller

  • Meets Stringent OEM Module Power Consumption and Performance Specifications
    • 20µA Quiescent Current in Skip Mode
    • ±1.5% FB Voltage Accuracy
    • Output Voltage Range: Fixed or Adjustable
  • Enables Crank-Ready Designs
    • Operates Down to 1.8V After Startup
    • Wide Input Supply Range from 4.5V to 36V
  • EMI Reduction Features Reduce Interference with Sensitive Radio Bands Without Sacrificing Wide Input Voltage Range
    • Spread-Spectrum Option
    • Frequency-Synchronization Input
    • Resistor-Programmable Frequency Between 200kHz and 2.2MHz

    • MAX25202
    36V Automotive Low-IQ 200kHz to 2.2MHz Synchronous Boost Controller

  • Meets Stringent OEM Module Power Consumption and Performance Specifications
    • 20µA Quiescent Current in Skip Mode
    • ±1.5% FB Voltage Accuracy
    • Output Voltage Range: Fixed or Adjustable
  • Enables Crank-Ready Designs
    • Operates Down to 1.8V After Startup
    • Wide Input Supply Range from 4.5V to 36V
  • EMI Reduction Features Reduce Interference with Sensitive Radio Bands Without Sacrificing Wide Input Voltage Range
    • Spread-Spectrum Option
    • Frequency-Synchronization Input
    • Resistor-Programmable Frequency Between 200kHz and 2.2MHz

    • MAX25200
    36V Automotive Low-IQ 200kHz to 2.2MHz Sepic/Flyback Controller

  • Meets Stringent OEM Module Power Consumption and Performance Specifications
  • 20μA Quiescent Current in Skip Mode
  • ±1.5% FB Voltage Accuracy

    • MAX20499
    Automotive Core Power Supply 5V, 8A/12A Step-Down Converter

  • High-Efficiency DC-DC Converter
  • Up to 12A peak output current:
    • MAX20499A: 8A
    • MAX20499B: 12A
  • Differential Remote Voltage Sensing

    • MAX20075D
    36V, 600mA/1.2A Mini Buck Converter with 3.5µA IQ

    • Synchronous DC-DC Converter with Integrated FETs
    • 20ns Minimum On-Time Small Solution Size Saves Space
    • PGOOD Output and High-Voltage EN Input Simplify Power Sequencing

    MAX20076E
    36V, 600mA/1.2A Mini Buck Converter with 3.5µA IQ

    • Synchronous DC-DC Converter with Integrated FETs
    • 20ns Minimum On-Time Small Solution Size Saves Space
    • PGOOD Output and High-Voltage EN Input Simplify Power Sequencing

    MAX20076D
    36V, 600mA/1.2A Mini Buck Converter with 3.5µA IQ

    • Synchronous DC-DC Converter with Integrated FETs
    • 20ns Minimum On-Time Small Solution Size Saves Space
    • PGOOD Output and High-Voltage EN Input Simplify Power Sequencing

    MAX25276D
    36V, 600mA/1.2A Mini Buck Converter with 3.5µA IQ

    • Synchronous DC-DC Converter with Integrated FETs
    • 20ns Minimum On-Time Small Solution Size Saves Space
    • PGOOD Output and High-Voltage EN Input Simplify Power Sequencing

    MAXM17724
    Integrated 4V-60V, 150mA, Himalaya uSLIC Power Module DC-DC Converter with 50mA Linear Regulator

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAXM17712
    Integrated 4V-60V, 150mA, Himalaya uSLIC Power Module DC-DC Converter with 50mA Linear Regulator

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAXM17720
    Integrated 4V-60V, 150mA, Himalaya uSLIC Power Module DC-DC Converter with 50mA Linear Regulator

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAXM15068
    7.5V to 60V, 200mA Himalaya uSLIC Step-Down Power Module

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAXM17633
    4.5V to 36V, 2A Himalaya uSLIC Step-Down Power Modules

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAXM17634
    4.5V to 36V, 2A Himalaya uSLIC Step-Down Power Modules

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAXM17635
    4.5V to 36V, 2A Himalaya uSLIC Step-Down Power Modules

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAXM17537
    4.5V to 60V, 3A High-Efficiency, DC-DC Step-Down SiP Power Module with Integrated Inductor

    • Reduces Design Complexity, Manufacturing Risks, and Time to Market
    • Saves Board Space in Space-Constrained Applications
    • Offers Flexibility for Power-Design Optimization

    MAXM17631
    4.5V to 36V, 1A Himalaya uSLIC Step-Down Power Module

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAXM17632
    4.5V to 36V, 1A Himalaya uSLIC Step-Down Power Module

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAXM17630
    4.5V to 36V, 1A Himalaya uSLIC Step-Down Power Module

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAX20473
    Low-Voltage Synchronous Boost Converter

    • Synchronous Boost Converter
    • 3.0V to 4.0V Operating Supply Voltage
    • True Output Shutdown

    MAX17662
    3.5V至36V、2A、高效、同步降压型DC-DC转换器

    • 减少外部元件，降低总体成本
    • 减少DC-DC稳压器库存清单
    • 降低功耗

    MAX77504
    14V输入、3A、高效Buck转换器，采用WLP或QFN封装

    • 3A单通道Buck调节器
    • 2.6V至14V输入电压
    • 0.6V至6V输出电压范围

    MAX20458
    36V Boost控制器，集成3.5A同步Buck转换器，适用于汽车应用

    • 满足严格的OEM模块功耗和性能规范
    • 支持启动就绪设计
    • EMI抑制特性可降低对敏感无线电频段的干扰，且不影响较宽输入电压范围

    MAX20057
    36V升压转换器，集成双路、3.5A/2A、同步Buck转换器，适用于汽车应用

    • 满足严格的OEM模块功耗和性能规范
    • 支持启动就绪设计
    • 集成和热增强封装，节省电路板空间和成本

    MAX17631
    4.5V至36V、1.5A、高效、同步降压型DC-DC转换器

    • 减少外部元件，降低总体成本
    • 减少DC-DC稳压器库存种类
    • 降低功耗

    MAX17634A
    4.5V至36V、4.25A、高效、同步降压型DC-DC转换器

    • 减少外部元件，降低总体成本
    • 减少DC-DC稳压器库存清单
    • 降低功耗

    MAX17634B
    4.5V至36V、4.25A、高效、同步降压型DC-DC转换器

    • 减少外部元件，降低总体成本
    • 减少DC-DC稳压器库存清单
    • 降低功耗

    MAX17634C
    4.5V至36V、4.25A、高效、同步降压型DC-DC转换器

    • 减少外部元件，降低总体成本
    • 减少DC-DC稳压器库存清单
    • 降低功耗

    MAX77501
    110VPK-PK High-Efficiency Piezo Haptic Actuator Boost Driver

    • 110VPK-PK Haptic Waveforms Generation
    • Optimized for up to 2µF Haptic Piezo Actuator
    • 2.8V to 5.5V Input Supply Range

    MAX20457
    36V Dual 3.5A/2A Synchronous Buck Converters for Automotive Applications

    • Meets Stringent OEM Module Power Consumption and Performance Specifications
    • Enables Crank-Ready Designs
    • EMI Reduction Features Reduce Interference with Sensitive Radio Bands without Sacrificing Wide Input-Voltage Range

    MAXM17536
    4.5V to 60V, 4A High-Efficiency, DC-DC Step-Down SiP Power Module with Integrated Inductor

    • Reduces Design Complexity, Manufacturing Risks, and Time-to-Market
    • Saves Board Space in Space-Constrained Applications
    • Offers Flexibility for Power-Design Optimization

    MAX17576
    4.5V to 60V, 4A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation

    • Reduces External Components and Total Cost
    • Reduces Number of DC-DC Regulators to Stock
    • Reduces Power Dissipation

    MAX20412
    Automotive Low-Voltage 2-Channel Step-Down Controller

    • 2-Channel, High-Efficiency DC-DC Controller in a Small Solution Size
    • High-Precision Regulator for Applications Processors
    • Low-Noise Features Reduce EMI

    MAX20343
    超低静态电流、低噪声、3.5W升/降压调节器

    • 延长系统运行时间
    • 低、连续噪声特性
    • 自适应负载瞬态响应

    MAX20004E
    36V, 220kHz to 2.2MHz, 4A/6A/8A Fully Integrated Automotive Step-Down Converters

    • Multiple Functions for Small Size
    • High Precision
    • Robust for the Automotive Environment

    MAX20006E
    36V, 220kHz to 2.2MHz, 4A/6A/8A Fully Integrated Automotive Step-Down Converters

    • Multiple Functions for Small Size
    • High Precision
    • Robust for the Automotive Environment

    MAX20008E
    36V, 220kHz to 2.2MHz, 4A/6A/8A Fully Integrated Automotive Step-Down Converters

    • Multiple Functions for Small Size
    • High Precision
    • Robust for the Automotive Environment

    技术文档

    类型 编号 PDF 标题
    应用笔记 3741 用于低压系统的模拟IC

    参考设计

    类型 编号 标题
    系统板6300MAXREFDES117#：心率和脉搏血氧监测器
    评估板3460MAX1921EVKIT MAX1920、MAX1921评估板