G5640P11U 2.5A降压转换器 致新代理商供应

　　General Description

　　The G5640 is a high efficiency, 2.5A buck converter with a high-side low RDS(ON) switch. It operates from 4.75V to 20V input voltage range, and provides up to 2.5A continuous output current with the output voltage adjustable down to 1.2V. Whenever the load is light, the G5640 automatically change the PWM operation mode to PFM operation to minimize the power consumption. Hence it is suitable for battery-powered devices.

　　It uses a fixed switching frequency up to 500kHz. When a short circuit is detected on the output, the device change switching frequency to 50kHz to protect IC from damage.

　　Features

　　► 4.75V to 20V Supply Voltage Operating Range

　　► Fixed 500kHz Switching Frequency

　　► Current-Mode Buck PWM Converter

　　► Built-in P-Channel Power MOSFET

　　► 2.5A Output Current

　　► 1.2V Internal Reference

　　► Shutdown Control

　　► Thermal-Shutdown and Internal Soft Start

　　► Cycle-by-Cycle Current-Limit

　　► Short Circuit Protection

　　► Under-Voltage Lockout Protection

　　Applications

　　► Distributed Power Systems

　　► Battery Charger

　　► Palmtop Computers, PDAs

　　► DSL Modems