SP6655ERSLASHTR中文資料西伯斯數(shù)據(jù)手冊PDF規(guī)格書

DESCRIPTION

The SP6655 is a 400mA synchronous buck regulator which is ideal for portable applications that use a Li-Ion or 3 cell alkaline/NiCD/NiMH input. The SP6655’s proprietary control loop, 20μA light load quiescent current, and 0.3?power switches provide excellent efficiency across a wide range of output currents. As the input battery supply decreases towards the output voltage, the SP6655 seamlessly transitions into 100% duty ratio operation, further extending useful battery life. The SP6655 is protected against overload and short circuit conditions with a precise inductor peak current limit. Other features include programmable under voltage lockout and low battery detection, externally programmed output voltage down to 1.0V, logic level shutdown control, and 140°C over temperature shutdown.

FEATURES

■ 98% Efficiency Possible

■ Small 10-Pin DFN Package

■ Ultra-low 20μA Quiescent Current

■ 625mA Inductor Peak Current Limit

■ Guaranteed Minimum 400mA Output Current

■ 2.7V to 5.5V Input Voltage Range

■ Output Adjustable Down to 1.0V

■ 100% Duty Ratio Low Dropout Operation

■ 80μA Light Load Quiescent Current in Dropout

APPLICATIONS

■ Cell Phones

■ PDAs

■ DSCs

■ MP3 Players

■ USB Devices

■ Point of Use Power