Input Current Limiting
Synchronous Buck Regulator
USB Power Maximizerв„ў General Description Features The MIC2267 is a USB Power Maximizerв„ў which
transfers the maximum power from the limited USB current
source by shaping the input current limit profile. It
incorporates a high efficiency, integrated synchronous step
down regulator. Internal 150mв„¦ switches and adjustable
operating frequency allows the MIC2267 to achieve
greater than 90% efficiency across a broad load range. It
replaces the USB current limit switch, 5V buck regulator
and minimizes capacitance for many USB applications.
The adjustable frequency control can be utilized to move
harmonics away from sensitive frequency bands.
The MIC2267 allows the input current limit profile to be
shaped for various applications. With a current mode
control with external compensation, the MIC2267 transient
response can be optimized over load and output
capacitance making it highly flexible for many applications.
Additional features include 1ВµA shutdown current, output
current limit and thermal shutdown protection. The
MIC2267 is available in a 12-pin 3mm x 3mm MLFВ® with a
junction operating range from вЂ“40В°C to +125В°C. …