DESCRIPTION
The LTC®3538 is a highly efficient, low noise, buck-boost DC/DC converter that operates from input voltages above, below, and equal to the output voltage. 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 Alkaline or NiMH applications where the output voltage is within the battery voltage range.

FEATURES
■ Regulated Output with Input Voltages Above,
   Below, or Equal to the Output
■ 800mA Continuous Output Current from a Single
   Lithium-Ion/Polymer Cell
■ Single Inductor
■ 1.8V to 5.25V VOUT Range
■ 2.4V to 5.5V VIN Range
■ 1MHz Fixed Frequency Operation
■ Output Disconnect in Shutdown
■ 35μA Quiesecent Current in Burst Mode Operation
■ <5μA Shutdown Current
■ Internal Soft-Start
■ Small, Thermally Enhanced 8-Lead (2mm x 3mm)
   DFN package

APPLICATIONS
■ Miniature Hard Disk Drives
■ MP3 Players
■ Digital Cameras
■ Cellular Handsets
■ PDAs, Handheld PC
■ GPS Receivers