MAX761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

MAX761属于集成电路（IC）的稳压器-DC-DC开关稳压器。由制造生产的MAX761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。