TK65318

ADVANCED INFORMATION TK653xx ADVANCED INFORMATION FEATURES HIGH CURRENT STEP-UP CONVERTER WITH BATTERY MONITOR APPLICATIONS s Very Low Quiescent Current (10 µA) s Extremely Low Operating Current (25 µA) s Internal Battery Monitor s Regulates Down to 1.8 V s Short Circuit Protection s Synchronous Rectification s Up To 95% Efficient s Battery Powered System s Cellular Telephones s Pagers s Personal Communications Equipment s Radio Controlled Systems s Toys DESCRIPTION The TK653xx mid power step-down converter is designed for portable battery powered systems, capable of operating from single Li-ion battery cells or two NiCad battery cells. The TK653xx provides the power switch, synchronous rectifier, and the control circuit for a buck step-down converter. Only three external components are required to complete the step-down conversion. The TK653xx provides laser-trimmed output voltages ranging from 1.8 V to 3.3 V. The low resistance MOSFET switch and synchronous rectifier allow av...