Philips Semiconductors
High efficiency DC/DC converter
Preliminary specification
TEA1205AT
FEATURES
• Fully integrated DC/DC converter circuit
• Up conversion in 2 different modes
• High efficiency over wide load range
• Synchronizes to external high frequency clock
• Output power up to 3.6 W (typ.) continuous, 8 W in GSM
burst mode
• Low quiescent power consumption
• True current limit for Li-ion battery compatibility
• 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.
GENERAL DESCRIPTION
The TEA1205AT (see Fig.1) 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 or 5.5 V from
2, 3 or 4 NiCd cell batteries or one Li-ion battery at an
output power level up to 3.6 W (typ.) continuously, or 8 W
in GSM TDMA (1 : 8) burst mode. The switching frequency
of the converter can be synchronized to an external
high-frequency clock. 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.
ORDERING INFORMATION
TYPE NUMBER
TEA1205AT
NAME
SO8
PACKAGE
DESCRIPTION
plastic small outline package; 8 leads; body width 3.9 mm
VERSION
SOT96-1
1998 Mar 24
2