STBB1-AXX(2011) Datasheet PDF - STMicroelectronics

Description

   The STBB1-A is a fixed frequency, high efficiency, buck-boost DC-DC converter able to provide output voltages ranging from 1.2 V to 5.5 V and input voltages from 2.0 V to 5.5 V. The device can operate with input voltages higher than, equal to, or lower than the output voltage making the product suitable for single lithium-Ion, multicell alkaline or NiMH applications where the output voltage is within the battery voltage range. 

Features

◾ Buck-boost DC-DC converter

◾ Operating input voltage range from 2.0 V to

   5.5 V

◾ 2% DC feedback voltage tolerance

◾ Synchronous rectification

◾ Shutdown function

◾ 1.5 MHz switching frequency

◾ Power save mode at light load

◾ Typical efficiency: > 94%

◾ 1 A output current capability

◾ Shutdown current < 1 µA

◾ Available in DFN10 (3 x 3 mm)

Applications

◾ Single cell Li-Ion and 3 cells alkaline, Ni-MH

   powered devices

◾ SD/MMC memory card supply

◾ Palmtop computers

◾ Cell phones

◾ Digital cameras