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.

FEATURES

■ Very Low Quiescent Current (10 µA)

■ Extremely Low Operating Current (25 µA)

■ Internal Battery Monitor

■ Regulates Down to 1.8 V

■ Short Circuit Protection

■ Synchronous Rectification

■ Up To 95 Efficient

APPLICATIONS

■ Battery Powered System

■ Cellular Telephones

■ Pagers

■ Personal Communications Equipment

■ Radio Controlled Systems

■ Toys