MAX762中文资料12V/15V或可调、高效率、低IQ、升压型DC-DC转换器数据手册ADI规格书

描述 Description

The MAX761/MAX762 step-up switching regulators provide high efficiency over a wide range of load currents, delivering up to 150mA. A unique, current-limited pulse-frequency-modulated (PFM) control scheme gives the devices the benefits of pulse-width-modulated (PWM) converters (high efficiency with heavy loads), while using less than 110µA of supply current (vs. 2mA to 10mA for PWM converters). The result is high efficiency over a wide range of loads.
The MAX761/MAX762 input voltage range is 2V to 16.5V. Output voltages are preset to 12V (MAX761) and 15V (MAX762), or they can be set with two external resistors. With a 5V input, the MAX761 guarantees a 12V, 150mA output. Its high efficiency, low supply current, fast start-up time, SHDN controlling capability, and small size make the MAX761 ideal for powering flash memory.
The MAX761/MAX762 have an internal 1A power MOSFET, making them ideal for minimum-component, low- and medium-power applications. These devices use tiny external components, and their high switching frequencies (up to 300kHz) allow for small surface-mount magnetics.
For increased output drive capability or higher output voltages, use the MAX770-MAX773, which are similar in design to the MAX761/MAX762, but drive external power MOSFETs. For stepping up to 5V, see the MAX756/MAX757 and MAX856-MAX859 data sheets.

特性 Features

• High Efficiency for a Wide Range of Load Currents
• 12V/150mA Flash Memory Programming Supply
• 110µA Max Supply Current
• 5µA Max Shutdown Supply Current
• 2V to 16.5V Input Voltage Range
• 12V (MAX761), 15V (MAX762) or Adjustable Output
• Current-Limited PFM Control Scheme
• 300kHz Switching Frequency
• Internal, 1A, N-Channel Power FET
• LBI/LBO Low-Battery Comparator

应用 Application

• 电池供电应用
• 闪存编程
• 高效DC-DC转换器
• PCMCIA卡

简介

MAX762属于集成电路（IC）的数模转换器（DAC）。由制造生产的MAX762数模转换器（DAC）数模转换器（DAC、D/A、D2A 或 D 转 A）可将数字信号转换为缓冲或无缓冲的模拟电压或电流。DAC 架构是否适合特定应用，要取决于分辨率和采样频率。DAC 通常用于音乐播放器，将数字数据流转换为模拟音频流。它们还用于电视和手机，将数字视频数据转换为模拟视频信号，再连接到屏幕驱动器，以显示单色或彩色图像。