GENERAL DESCRIPTION
The TEA1204T is a fully integrated DC/DC converter circuit using the minimum amount of external components. It is intended to be used to supply electronic circuits with supply voltages of 3.3, 3.6 or 5.0 V from 2, 3 or 4 NiCd cell batteries or one LiIon battery at an output power level up to 3.6 W (typ.) continuously, or 8 W in GSM TDMA (1 : 8) burst mode. 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 synchronous rectification.

FEATURES
• Fully integrated DC/DC converter circuit
• Up-or-down conversion, each in 2 different modes
• High efficiency (up to 96%) at high loads
• Output power up to 3.6 W (typ.) continuous, 8 W in GSM burst mode
• Low quiescent power consumption
• Burst mode input for optimal dynamic response to switching loads
• True current limit for LiIon battery compatibility
• Up to 100% duty cycle in down mode
• 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.