数据手册MAX1771 低压输入时提供高效转换,降低噪声 .pdf [英文Rev.2(PDF,1.5MB)]

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The MAX1771 step-up switching controller provides 90% efficiency over a 30mA to 2A load. A unique current-limited pulse-frequency-modulation (PFM) control scheme gives this device the benefits of pulse-width-modulation (PWM) converters (high efficiency at heavy loads), while using less than 110µA of supply current (vs. 2mA to 10mA for PWM converters). This controller uses miniature external components. Its high switching frequency (up to 300kHz) allows surface-mount magnetics of 5mm height and 9mm diameter. It accepts input voltages from 2V to 16.5V. The output voltage is preset at 12V, or can be adjusted using two resistors. The MAX1771 optimizes efficiency at low input voltages and reduces noise by using a single 100mV current-limit threshold under all load conditions. A family of similar devices, the MAX770-MAX773, trades some full-load efficiency for greater current-limit accuracy; they provide a 200mV current limit at full load, and switch to 100mV for light loads. The MAX1771 drives an external N-channel MOSFET switch, allowing it to power loads up to 24W. If less power is required, use the MAX756/MAX757 or MAX761/MAX762 step-up switching regulators with on-board MOSFETs. An evaluation kit is available.

产品关键特性
  • 90% Efficiency for 30mA to 2A Load Currents
  • Up to 24W Output Power
  • 110µA (max) Supply Current
  • 5µA (max) Shutdown Current
  • 2V to 16.5V Input Range
  • Preset 12V or Adjustable Output Voltage
  • Current-Limited PFM Control Scheme
  • Up to 300kHz Switching Frequency
  • Evaluation Kit Available
应用与使用范围
  • 电池供电应用
  • 闪存编程
  • 大功率射频功放电源
  • 掌上电脑/手持终端
  • 便携式通信装置
  • LCD正偏置发生器
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
MAX1771C/D生产中DICESALES;NA引脚;DICE;封装信息参考数据资料
MAX1771C/W+生产中DICESALES;NA引脚;DICE;封装信息0°C至+70°C参考数据资料
MAX1771CPA生产中PDIP(N);8引脚;79.7mm²封装信息0°C至+70°CRoHS/无铅:否材料分析
MAX1771CPA+生产中PDIP(N);8引脚;79.7mm²封装信息0°C至+70°CRoHS/无铅:无铅材料分析
MAX1771CPA+T生产中PDIP(N);8引脚;79.7mm²封装信息0°C至+70°CRoHS/无铅:无铅材料分析
MAX1771CSA生产中SOIC(N);8引脚;30.9mm²封装信息0°C至+70°CRoHS/无铅:否材料分析
MAX1771CSA+生产中SOIC(N);8引脚;30.9mm²封装信息0°C至+70°CRoHS/无铅:无铅材料分析
MAX1771CSA+T生产中SOIC(N);8引脚;30.9mm²封装信息0°C至+70°CRoHS/无铅:无铅材料分析
MAX1771CSA-G05生产中N.SO;封装信息0°C至+70°C参考数据资料
MAX1771CSA-T生产中SOIC(N);8引脚;30.9mm²封装信息0°C至+70°CRoHS/无铅:否材料分析
MAX1771CSA-TG05生产中SOIC(N);8引脚;30.9mm²封装信息0°C至+70°CRoHS/无铅:否材料分析
MAX1771EPA生产中PDIP(N);8引脚;79.7mm²封装信息-40°C至+85°CRoHS/无铅:否材料分析
MAX1771EPA+生产中PDIP(N);8引脚;79.7mm²封装信息-40°C至+85°CRoHS/无铅:无铅材料分析
MAX1771ESA生产中SOIC(N);8引脚;30.9mm²封装信息-40°C至+85°CRoHS/无铅:否材料分析
MAX1771ESA+生产中SOIC(N);8引脚;30.9mm²封装信息-40°C至+85°CRoHS/无铅:无铅材料分析
MAX1771ESA+T生产中SOIC(N);8引脚;30.9mm²封装信息-40°C至+85°CRoHS/无铅:无铅材料分析
MAX1771ESA-T生产中SOIC(N);8引脚;30.9mm²封装信息-40°C至+85°CRoHS/无铅:否材料分析
MAX1771MJANRNDCDIP(N);8引脚;82.6mm²封装信息-55°C至+125°CRoHS/无铅:否材料分析
MAX1771MPA/PR生产中PDIP(N);8引脚;79.7mm²封装信息-55°C至+125°CRoHS/无铅:否材料分析
功能接近器件
MAX7563.3V/5V/可调输出、升压型DC-DC转换器
MAX7573.3V/5V/可调输出、升压型DC-DC转换器
MAX76112V/15V或可调、高效率、低IQ、升压型DC-DC转换器
MAX76212V/15V或可调、高效率、低IQ、升压型DC-DC转换器
MAX6085V或可调、低电压、升压型DC-DC控制器
评估板与开发套件
MAX1771EVKITMAX1771评估板
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