TEA1206

INTEGRATED CIRCUITS DATA SHEET TEA1206T High efficiency DC/DC converter Preliminary specification Supersedes data of 1998 Mar 24 File under Integrated Circuits, IC03 1999 Sep 16 Philips Semiconductors Preliminary specification High efficiency DC/DC converter FEATURES Fully integrated DC/DC converter circuit Up-or-down conversion Start-up from 1.8 V input Adjustable output voltage High efficiency over large load range Power handling capability up to 1 A continuous average current 600 kHz switching frequency Low quiescent power consumption Synchronizes to external 9 to 20 MHz clock True current limit for Li-ion battery compatibility Up to 100% duty cycle in down mode Undervoltage lockout Shut-down function 8-pin SO package. APPLICATIONS TEA1206T Cellular and cordless phones, PDAs and others Supply voltage source for low-voltage chip sets Portable computers Battery backup supplies Cameras. GENERAL DESCRIPTION The TEA1206T (see Fig.1) is a fully integrated DC/DC converter circuit. Efficient, compact and dynamic power conversion is achieved using a novel, digitally controlled Pulse Width and Frequency Modulation (PWFM) like control concept, integrated low RdsON CMOS power switches with low parasitic capacitances, and fully synchronous rectification. The device operates at a high 590 kHz switching frequency which enables the use of minimum size external components. Deadlock is prevented by an on-chip undervoltage lockout circuit. Compatibil...