3A输出电流, 4.5~18V工作电压， 600kHz，宁波同步降压DC/DC转换器XR8113

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3A输出电流, 4.5~18V工作电压， 600kHz，同步降压DC/DC转换器XR8113

GENERAL DESCRIPTION

The XR8113 is a high-efficiency monolithic synchronous step-down DC-DC converter with an input voltage range of 4.5V-18V. Constant On-Time (COT) mode architecture, capable of delivering up to 3A. Quiescent current of XR8113 is 400μA, and when it is turn off, shutdown current is 5uA.

DCM/CCM mode operation provides very low output ripple voltage for noise sensitive applications. Switching frequency is internally set at 600kHz, allowing the use of small surface mount inductors and capacitors. Low output voltages are easily supported with the 0.6V feedback reference voltage.

The XR8113 requires a minimal number of readily available, external components and is available in a small package.

FEATURES

? Wide 4.5V to 18V Operating Input Range

? 3A Continuous Output Current

? 600kHz Switching Frequency

? Short Protection with Hiccup-Mode

? Built-in overcurrent Limit

? Internal-fixed 0.8ms Soft-Start Time

? 94/63mΩ Low RDS(ON) internal MOSFETs

? Output Adjustable from 0.6V to 7V

? 98% Duty cycle Max

? Thermal Shutdown

? COT Mode for fast load Transient response

? SOT23-6 Package

APPLICATIONS

? Digital Set Top Boxes

? Flat Panel Television and Monitors

? Notebook computer

? Wireless and DSL Modems 

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