MAX756中文资料3.3V/5V/可调输出、升压型DC-DC转换器数据手册ADI规格书

描述 Description

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.

特性 Features

• 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

应用 Application

• 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

简介

MAX756属于集成电路（IC）的稳压器-DC-DC开关稳压器。由ADI制造生产的MAX756稳压器 - DC-DC 开关稳压器DC-DC 开关稳压器 PMIC（电源管理集成电路）产品族中的产品是元器件级设备，用于需要稳定 DC 输入电压和/或将其转换为不同幅度的输出电压的应用。这些器件与称为“控制器”PMIC 的类似产品的区别在于集成了主开关元件，设备提供的电力会通过该元件。