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MAX1733：低电压、降压型DC-DC转换器，SOT23封装

高效DC-DC方案，用于低压逻辑电路供电

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.

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

MAX1733、MAX1734：典型工作电路 应用 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)

数据手册DataSheet

关键参数

开发工具

• MAX1734EVKIT

技术资料

• Buck Regulator Generates Ultra-Low Output Voltage
• Parallel-Port Interface Powers Low Voltage Systems

相关产品

• MAX1692：低噪声、5.5V输入、PWM降压型稳压器

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