STBB1-AXX Datasheet, PDF (1/24 Pages) STMicroelectronics – Buck-boost DC-DC converter

STBB1-AXX
1 A, high efficiency single inductor dual mode
buck-boost DC-DC converter
Datasheet - production data
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 (3x3 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
Description
The STBB1-AXX 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.
The integrated low-R_DS(on) N-channel and
P-channel MOSFET switches contribute to its
high efficiency. The mode pin allows the selection
between auto mode and forced PWM mode thus
taking benefit either of lower power consumption
or better dynamic performance. The device also
includes soft-start control, thermal shutdown and
current limit. The STBB1-AXX is packaged in
DFN10 (3x3 mm).
Table 1: Device summary
Order code
Package
Packing
STBB1-APUR DFN10 (3x3 mm) Tape and reel
October 2014
DocID022197 Rev 4
This is information on a product in full production.
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