MAX653ESA
数据手册.pdf5V / 3.3V / 3V /可调,高效率,低IQ ,降压型DC- DC转换器 5V/3.3V/3V/Adjustable, High-Efficiency, Low IQ, Step-Down DC-DC Converters
General Description
The MAX639/MAX640/MAX653 step-down switching regulators provide high efficiency over a wide range of load currents, delivering up to 225mA. A current-limiting pulse-frequency-modulated PFM control scheme gives the devices the benefits of pulse-width-modulated PWM converters high efficiency at heavy loads, while using only 10µA of supply current vs. 2mA to 10mA for PWM converters. The result is high efficiency over a wide range of loads.
Features
♦High Efficiency for a Wide Range of Load Currents
♦10µA Quiescent Current
♦Output Currents Up to 225mA
♦Preset or Adjustable Output Voltage:
5.0V MAX639
3.3V MAX640
3.0V MAX653
♦Low-Battery Detection Comparator
♦Current-Limiting PFM Control Scheme
Applications
9V Battery to 5V, 3.3V, or 3V Conversion
High-Efficiency Linear Regulator Replacement
Portable Instruments and Handy-Terminals
5V-to-3.3V Converters