MAX766ESA

-5V / -12V / -15V或可调，高效率，低IQ DC- DC逆变器 -5V/-12V/-15V or Adjustable, High-Efficiency, Low IQ DC-DC Inverters

General Description

The MAX764/MAX765/MAX766 inverting switching regulators are highly efficient over a wide range of load currents, delivering up to 1.5W. A unique, current-limited, pulse-frequency-modulated PFM control scheme combines the benefits of traditional PFM converters with the benefits of pulse-width-modulated PWM converters.

Like PWM converters, the MAX764/MAX765/MAX766 are highly efficient at heavy loads. Yet because they are PFM devices, they use less than 120µA of supply current vs. 2mA to 10mA for a PWM device.

The input voltage range is 3V to 16V. The output voltage is preset at -5V MAX764, -12V MAX765, or -15V MAX766; it can also be adjusted from -1V to -16V using two external resistors Dual ModeTM. The maximum operating VIN - VOUT differential is 20V.

Features

♦ High Efficiency for a Wide Range of Load Currents

♦ 250mA Output Current

♦ 120µA Max Supply Current

♦ 5µA Max Shutdown Current

♦ 3V to 16V Input Voltage Range

♦ -5V MAX764, -12V MAX765, -15V MAX766, or Adjustable Output from -1V to -16V

♦ Current-Limited PFM Control Scheme

♦ 300kHz Switching Frequency

♦ Internal, P-Channel Power MOSFET

Applications

  LCD-Bias Generators

  Portable Instruments

  LAN Adapters

  Remote Data-Acquisition Systems

  Battery-Powered Applications