MAX771EPA

5V / 12V / 15V或可调，高效率，低IQ ，升压型DC-DC控制器 5V/12V/15V or Adjustable, High-Efficiency, Low IQ, Step-Up DC-DC Controllers

General Description

The MAX770–MAX773 step-up switching controllers provide 90% efficiency over a 10mA to 1A load. A unique current-limited pulse-frequency-modulation PFM control scheme gives these devices the benefits of pulse-width-modulation PWM converters high efficiency at heavy loads, while using less than 110µA of supply current vs. 2mA to 10mA for PWM converters.

Features

♦ 90% Efficiency for 10mA to 1A Load Currents

♦ Up to 15W Output Power

♦ 110µA Max Supply Current

♦ 5µA Max Shutdown Current

♦ 2V to 16.5V Input Range MAX770/MAX771/MAX772

♦ Internal Shunt Regulator for High Input Voltages MAX773

♦ Preset or Adjustable Output Voltages

   MAX770: 5V or Adjustable

   MAX771: 12V or Adjustable

   MAX772: 15V or Adjustable

   MAX773: 5V, 12V, 15V, or Adjustable

♦ Current-Limited PFM Control Scheme

♦ 300kHz Switching Frequency

Applications

Palmtops/Handy-Terminals

High-Efficiency DC-DC Converters

Battery-Powered Applications

Positive LCD-Bias Generators

Portable Communicators

Flash Memory Programmers