DESCRIPTION
The LTC®3443 is a high efficiency, fixed frequency, buckboost DC/DC converter that operates from input voltages above, below or equal to the output voltage. The part is pin for pin compatible with its predecessor, the LTC3441, with a lower operating frequency (600kHz), and a VC pin clamp circuit during Burst Mode operation. The topology incorporated in the IC provides a continuous transfer function through all operating modes, making the product ideal for single Lithium Ion or multicell applications where the output voltage is within the battery voltage range.

FEATURES
■ Regulated Output with Input Above, Below or Equal
   to the Output
■ Single Inductor, No Schottky Diodes
■ High Efficiency: Up to 96%
■ 28µA Quiescent Current in Burst Mode® Operation
■ Up to 1.2A Continuous Output Current from a Single
   Lithium-Ion
■ True Output Disconnect in Shutdown
■ 2.4V to 5.5V Input Range
■ 2.4V to 5.25V Output Range
■ 600kHz Fixed Frequency Operation
■ Synchronizable Oscillator
■ Selectable Burst Mode or Fixed Frequency Operation
■ <1µA Quiescent Current in Shutdown
■ Small, Thermally Enhanced 12-Lead
   (4mm × 3mm ×0.8mm) DFN package

APPLICATIONS
■ Handheld Computers
■ Handheld Instruments
■ MP3 Players
■ Digital Cameras