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. Compatibility with Li-ion batteries is guaranteed by an accurate current limit function.

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
• Cellular and cordless phones, PDAs and others
• Supply voltage source for low-voltage chip sets
• Portable computers
• Battery backup supplies
• Cameras.