DESCRIPTION

The SP6648 is an ultra-low quiescent current, high efficiency step-up DC-DC converter ideal for single cell, dual cell alkaline and Li-Ion battery applications such as digital still cameras, PDAs, MP3 players, and other portable devices. The SP6648 combines the high-load efficiency associated with PWM control, with the low quiescent current and excellent light-load efficiency of PFM control. The SP6648 features 12μA quiescent current, synchronous rectification, a 0.3Ω charging switch, anti-ringing inductor switch, programmable low-battery detect, under-voltage lockout and programmable inductor peak current. The device can be controlled by a 1nA active LOW shutdown pin.

FEATURES

■ Ultra-low 12μA Quiescent Current

■ 400mA Output Current at 2.6V Input: 3.3VOUT

■ 94% Efficiency from 2 Cell to 3.3VOUT

■ Wide Input Operating Voltage: 0.85V to 4.5V

■ 3.3V Fixed or Adjustable Output

■ Integrated Synchronous Rectifier: 0.3Ω

■ 0.3Ω Switch

■ Anti-Ringing Switch Technology

■ Programmable Inductor Peak Current

■ Logic Shutdown Control

■ Under Voltage Lock-Out at 0.61V

■ Programmable Low-Battery Detect

■ Single or Dual Cell Alkaline

■ Small 10 pin DFN Package and Industry Standard 10 pin MSOP

APPLICATIONS

■ Camera Flash LED Driver

■ Wireless Mouse

■ PDAs

■ Pagers

■ Medical Monitors

■ Handheld Portable Devices

■ MP3 Players