DESCRIPTION
The SP2354 is a high efficiency synchronous
buck/boost DC/DC converter for application
using battery powered devices to drive a
single power LED at current up to 1A. The
regulator operates in either synchronous buck,
boost or buck-boost mode depending on the
input voltage and LED forward voltage.
Efficiency greater than 90% can be achieved
over the entire usable range of Li-Ion battery:
2.8V to 5.5V.
LED current is programmable to one of four
levels,Including shutdown, with dual external
resistors and dual enable inputs. In shutdown
no supply current is drawn.
A high operation frequency of 1MHz allows
using of small external components. The
SP2354 is offered in DFN10 package.
FEATURES
_ Higher than 85% Efficiency
_ Wide Input Voltage Range: 2.8V to 5.5V
_ Faulty LED Protection
_ Internal Soft Start
_ Up to 1A continuous Output Current
_ Zero Shutdown Current
_ Over Temperature Protection
_ Over Current Protection
_ Constant Frequency 1.0MHz Operation
_ DFN10 Package
APPLICATIONS
_ Digital Camera
_ PDA
_ Hand Held Communication Equipment
_ Li-Ion LED Driver
_ Cell Phone Camera Flash
_ Cell Phone Torch Lighting
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