LTC3443

LTC3443 High Current Micropower 600kHz Synchronous Buck-Boost DC/DC Converter U U 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 U APPLICATIO S ■ Handheld Computers ■ Handheld Instruments ■ MP3 Players ■ Digital Cameras , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Burst Mode is a registered trademark of Linear Technology Corporation. U.S. Patent #’s 6404251, 6166527 DESCRIPTIO 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 ap...