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