DESCRIPTION

The SP6649 is an ultra-low quiescent current, high efficiency step-up DC-DC converter ideal for single and dual cell alkaline, or Li-Ion battery applications such as digital still cameras, PDA’s, MP3 players, and other portable devices. The SP6649 combines the high delivery associated with PWM control, and the low quiescent current and excellent light-load efficiency of PFM control.

FEATURES

■ Ultra-low 12µA Quiescent Current

■ 700mA Output Current at 2.6VIN, 3.3VOUT

■ 94% Efficiency Possible

■ Wide Input Voltage Range: 0.85V to 4.5V

■ 3.3V Fixed Output and adjustable 2.5V to 5.0V Output Range

■ Internal Synchronous Rectifier for High Efficiency

■ 0.3 Charging Switch, 0.3 Synchronous Rectifier

■ Anti-Ringing Inductor Switch

■ Programmable Inductor Peak Current

■ Logic Shutdown Control

■ Under Voltage Lock-Out, 0.62V

■ Programmable Low Battery Detect

■ Small 10 pin MSOP Package

APPLICATIONS

■ Digital Still Cameras

■ MP3 Players

■ PDAs

■ Pagers

■ Handheld Portable Devices

■ Medical Monitors