DESCRIPTION
   The SP6644/6645 devices are high-efficiency, low-power step-up DC-DC converters ideal for single or dual alkaline cell applications such as pagers, remote controls, pointing devices, medical monitors, and other low-power portable end products.

■ 90mA Output Current at 1.3V Input
■ 190mA Output Current at 2.6V Input
■ +2V to +5.5V Output Range
■ 0.88V Guaranteed Start-Up
■ 92% High Efficiency
■ 1.6µA Quiescent Supply Current at VBATT
■ Reverse Battery Protection
■ Internal Synchronous Rectifier
■ 5nA Logic Controlled Shutdown Current
   From VBATT
■ Low-Battery Detection Active LOW Output
■ Small 8 Pin MSOP Package
■ No External FETs
■ Flexibility to Optimize Inductor Type
   with Programmable Peak Current
   Control