MIC2145 Micrel, Inc. MIC2145
High Efficiency 2.5W Boost Converter General Description Features The MIC2145 is a small size boost switching regulator that
can provide over 2.5W of output power. The input voltage
range is between 2.4V to 16V, making the device suitable for
one-cell Li-Ion and 3-to 4-cell alkaline/NiCad/NiMH applications. The output voltage of the MIC2145 can be adjusted up
to 16V.
The MIC2145 is well suited for portable, space-sensitive
applications. Its typical 450kHz operation allows small surface mount external components to be used. The MIC2145
has a low quiescent current of 200ВµA, and a typical shutdown
current of 0.5ВµA. The MIC2145 is capable of high efficiencies
in a small board area.
The MIC2145 features a low-on resistance internal switch
that allows it to provide over 2.5W of output power. The peak
switch current can be programmed through an external
resistor. This allows the user to set the peak switch current at
the level where maximum efficiency occurs. It also allows the
user to further optimize for efficiency and inductor size by
setting the peak current below the level of inductor saturation.
The MIC2145 is available in an MSOP-8 and 3mmГ—3mm
MLFв„ў-10L package with an ambient operating temperature
range from –40°C to +85°C. 2.4V to 16V input voltage
Output adjustable to 16V
Programmable peak current limit …
