1.2A同步降压稳压器 G5698ADJRE1U 致新科技

　　General Description

　　The G5698 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. Supply current during operation is only 50μA and drops to <1μA in shutdown. The 2.5V to 6V input voltage range makes the G5698 ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery run time in portable systems. Switching frequency is internally set at 1.2MHz, allowing the use of small surface mount inductors and capacitors. The internal synchronous switch increase efficiency and eliminates the need for an external Schottky diode. Built-in soft start function eliminates in-rush current that could damage the system.

　　Features

　　► High Efficiency: Up to 95%

　　► Low Quiescent Current: Only 50μA During Operation

　　► Internal Soft Start Function

　　► 1.2A Output Current

　　► 2.5V to 6V Input Voltage Range

　　► 1.2MHz Switching Frequency

　　► No Schottky Diode Required

　　► 100% Duty Cycle in Dropout Operation

　　► 0.6V Reference Allows Low Output Voltages

　　► <1μA Shutdown Current

　　► Current Mode Operation for Excellent Line and Load Transient Response

　　► Over Temperature Protected

　　► RoHS Compliant

　　Applications

　　► Cellular Telephones

　　► Personal Information Appliances

　　► Microprocessors and DSP Core Supplies

　　► Wireless and DSL Modems

　　► Digital Still and Video Cameras

　　► MP3 Players

　　► Portable Instruments