General Description
Micrel’s MIC2194 is a high efficiency PWM buck control IC housed in the SO-8 package. Its 2.9V to 14V input voltage range allows it to efficiently step down voltages in 3.3V, 5V, and 12V systems as well as 1- or 2-cell Li Ion battery powered applications. The flexible architecture of the MIC2194 allows for it to be configured as a buck or a buck-boost converter.

Features
• 2.9V to 14V input voltage range
• 400kHz oscillator frequency
• PWM current mode control
• 2Ω output drivers
• 100% maximum duty cycle
• 0.5µA micro-power shutdown
• Programmable UVLO
• Front edge blanking
• Cycle-by-cycle current limiting
• Frequency foldback short circuit protection
• 8-lead SOIC package

Applications
• Point of load power supplies
• Negative voltage buck-boost power supplies
• Distributed power systems
• Base stations
• Wireless modems
• ADSL line cards
• Servers
• Step down conversion in 3.3V, 5V, 12V systems
• 1-and 2-cell Li Ion battery operated equipment