MAX774 - -5V/-12V/-15V或可调、高效率、低IQ、反相、DC-DC控制器

MAX774是Maxim美信半导体公司的一款DC-DC开关调节器产品，MAX774是-5V/-12V/-15V或可调、高效率、低IQ、反相、DC-DC控制器，本站介绍了MAX774的封装应用图解、特点和优点、功能等，并给出了与MAX774相关的Maxim元器件型号供参考。

MAX774 - -5V/-12V/-15V或可调、高效率、低IQ、反相、DC-DC控制器 - DC-DC开关调节器 - 负压LCD偏置电源，可产生极高的负电源电压，输出电流高达1A - 美信半导体

产品概述

The MAX774/MAX775/MAX776 inverting switching regulators deliver high efficiency over three decades of load current. A unique current-limited, pulse-frequencymodulated (PFM) control scheme provides the benefits of pulse-width modulation (high efficiency with heavy loads), while using less than 100µA of supplycurrent (vs. 2mA to 10mA for PWM converters). The result is high efficiency over a wide range of loads.

These ICs also use tiny external components; their high switching frequency (up to 300kHz) allows for less than 5mm diameter surface-mount magnetics.

The MAX774/MAX775/MAX776 accept input voltages from 3V to 16.5V, and have preset output voltages of -5V, -12V, and -15V, respectively. Or, the output voltagecan be user-adjusted with two resistors. Maximum VIN - VOUT differential voltage is limited only by the break-down voltage of the chosen external switch transistor.

These inverters use external P-channel MOSFET switches, allowing them to power loads up to 5W. If less power is required, use the MAX764/MAX765/MAX766 inverting switching regulators with on-board MOSFETs.

关键特性

以下关键特性由Maxim美信半导体提供：

85% Efficiency for 5mA to 1A Load Currents

Up to 5W Output Power

100µA (max) Supply Current

5µA (max) Shutdown Current

3V to 16.5V Input Range

-5V (MAX774), -12V (MAX775), -15V (MAX776), or Adjustable Output Voltage

Current-Limited PFM Control Scheme

300kHz Switching Frequency

热门应用

电池供电应用

数据通信

高效DC-DC转换器

LCD偏置发生器

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