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完整的数据资料 (PDF, 120kB) 英文 下载 The MAX756/MAX757 are CMOS step-up DC-DC switching regulators for small, low input voltage or battery-powered systems. The MAX756 accepts a positive input voltage down to 0.7V and converts it to a higher pin-selectable output voltage of 3.3V or 5V. The MAX757 is an adjustable version that accepts an input voltage down to 0.7V and generates a higher adjustable output voltage in the range from 2.7V to 5.5V. Typical full-load efficiencies for the MAX756/MAX757 are greater than 87%. The MAX756/MAX757 provide three improvements over previous devices. Physical size is reduced-the high switching frequencies (up to 0.5MHz) made possible by MOSFET power transistors allow for tiny (< 5mm diameter) surface-mount magnetics. Efficiency is improved to 87% (10% better than with low-voltage regulators fabricated in bipolar technology). Supply current is reduced to 60µA by CMOS construction and a unique constant-off-time pulse-frequency modulation control scheme.

现备有评估板：  MAX756EVKIT  

关键特性		应用/使用
Operates Down to 0.7V Input Supply Voltage 87% Efficiency at 200mA 60µA Quiescent Current 20µA Shutdown Mode with Active Reference and LBI Detector 500kHz Maximum Switching Frequency ±1.5% Reference Tolerance Over Temperature Low-Battery Detector (LBI/LBO) 8-Pin DIP and SO Packages		2节和3节电池供电设备 3.3V至5V升压转换 血糖表 医疗仪表 掌上电脑 个人数据通信/计算机 便携式数据收集设备

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