数据手册MAX1733, MAX1734 高效DC-DC方案,用于低压逻辑电路供电 .pdf [英文Rev.0(PDF,280kB)]

{状况:生产中。}

The MAX1733/MAX1734 step-down DC-DC converters deliver over 250mA to outputs as low as 1.25V. These converters use a unique proprietary current-limited control scheme that achieves over 90% efficiency. These devices maintain extremely low quiescent supply current (40µA), and their high 1.2MHz (max) operating frequency permits small, low-cost external components. This combination of features makes the MAX1733/ MAX1734 excellent high-efficiency alternatives to linear regulators in space-constrained applications. Internal synchronous rectification greatly improves efficiency and eliminates the external Schottky diode required in conventional step-down converters. Both devices also include internal digital soft-start to limit input current upon startup and reduce input capacitor requirements. The MAX1733 provides an adjustable output voltage (1.25V to 2.0V). The MAX1734 provides factory-preset output voltages (see Selector Guide). Both are available in space-saving 5-pin SOT23 packages.

产品关键特性
  • 250mA Guaranteed Output Current
  • Synchronous Rectifier for Over 90% Efficiency
  • Tiny 5-Pin SOT23 Package
  • 40µA Quiescent Supply Current
  • 0.01µA Logic-Controlled Shutdown
  • Up to 1.2MHz Switching Frequency
  • Fixed 1.8V or 1.5V Outputs (MAX1734)
  • Adjustable Output Voltage (MAX1733)
  • ±1.5% Initial Accuracy
  • 2.7V to 5.5V Input Range
  • Soft-Start Limits Startup Current
应用与使用范围
  • 蜂窝电话
  • 计算机:台式机、工作站和服务器
  • 消费类音频
  • 数码相机
  • 全球定位系统(GPS)
  • 掌上电脑
  • POS终端
  • 无线数据
  • 无线局域网(WLAN)
典型工作电路

芯片订购型号
订购型号产品状态封装形式工作温度RoHS/无铅
MAX1733EUK+生产中SOT;5引脚;9mm²封装信息-40°C至+85°CRoHS/无铅:无铅材料分析
MAX1733EUK+T生产中SOT;5引脚;9mm²封装信息-40°C至+85°CRoHS/无铅:无铅材料分析
MAX1733EUK-T生产中SOT;5引脚;9mm²封装信息-40°C至+85°CRoHS/无铅:否材料分析
MAX1733EUK-TG05生产中SOT;封装信息-40°C至+85°C参考数据资料
MAX1734EUK15生产中SOT;5引脚;9mm²封装信息-40°C至+85°CRoHS/无铅:否材料分析
MAX1734EUK15+生产中SOT;5引脚;9mm²封装信息-40°C至+85°CRoHS/无铅:无铅材料分析
MAX1734EUK15+T生产中SOT;5引脚;9mm²封装信息-40°C至+85°CRoHS/无铅:无铅材料分析
MAX1734EUK15-T生产中SOT;5引脚;9mm²封装信息-40°C至+85°CRoHS/无铅:否材料分析
MAX1734EUK18+生产中SOT;5引脚;9mm²封装信息-40°C至+85°CRoHS/无铅:无铅材料分析
MAX1734EUK18+T生产中SOT;5引脚;9mm²封装信息-40°C至+85°CRoHS/无铅:无铅材料分析
MAX1734EUK18-T生产中SOT;5引脚;9mm²封装信息-40°C至+85°CRoHS/无铅:否材料分析
功能接近器件
MAX1692低噪声、5.5V输入、PWM降压型稳压器
评估板与开发套件
MAX1734EVKITMAX1733、MAX1734评估板
相关芯片型号
MAX1734EVKITMAX1733、MAX1734评估板
MAX1733-MAX1734.pdf MAX1734
Buck Regulator Generates Ultra-Low Output Voltage MAX6102
Parallel-Port Interface Powers Low Voltage Systems MAX1841
典型工作电路 MAX1734