GENERAL DESCRIPTION
The TEA1211HN is a fully integrated auto-up/down DC/DC converter circuit with I2C-bus interface. Efficient, compact and dynamic power conversion is achieved using a digitally controlled pulse width and frequency modulation like control concept, four integrated low RDS(on) power switches with low parasitic capacitances and fully synchronous rectification.

FEATURES
• I2C-bus programmable output voltage range of 1.5 V to 5.5 V
• Single inductor topology
• High efficiency up to 94 % over wide load range
• Wide input range; functional from 2.55 V up to 5.5 V
• 1.7 A maximum input and output current
• Low quiescent power consumption
• 600 kHz switching frequency
• Four integrated very low RDS(on) power MOSFETs
• Synchronizable to external clock
• Externally adjustable current limit for protection and efficient battery use in case of dynamic loads
• Under voltage lockout
• PWM-only option
• Shut-down current less than 1 µA
• 32-pin small body HVQFN package.

APPLICATIONS
• Stable output voltage from Lithium-Ion batteries
• Variable voltage source for PAs (Power Amplifiers) in cellular phones
• Wireless handsets
• Hand-held instruments
• Portable computers.