台湾致新 G5728TO1U TSOT-23-5 代理商主推

　　General Description

　　The G5728 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 G5728 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 1MHz, 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 93%

　　Low Quiescent Current: Only 50μA During Operation

　　Internal Soft Start Function

　　1A Output Current

　　2.5V to 6V Input Voltage Range

　　1MHz 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