General Description

The MIC2198 is a high-power 500kHz synchronous buck DC-to-DC controller housed in a small 4mm×4mm MLF™ 12-pin package. The MIC2198 operates from a wide 4.5V to 32V input and can be programmed for output voltages from 0.8V to 6V. The wide input voltage capability makes the MIC2198 an ideal solution for point-of-load DC-to-DC conversion in 5V, 12V and higher systems.

Features

• 4.5V to 32V input range

• 4mm×4mm MLF™ package

• 500kHz PWM operation

• >90 efficiency

• Output voltage adjustable down to 0.8V

• 20A output current capability

• Drives all N-Channel MOSFETs

• Logic controlled micropower shutdown

• Cycle-by-cycle current limiting

• Adjustable undervoltage lockout

• Frequency foldback overcurrent protection

Applications

• Point-of-load DC-to-DC conversion from 5V, 12V and higher supplies

• Telecom equipment

• Wireless modems

• Servers

• Base stations