General Description

The MIC4685 is a high-efficiency 200kHz stepdown (buck) switching regulator. Power conversion efficiency of above 85 is easily obtainable for a wide variety of applications. The MIC4685 achieves 3A of continuous current in the 7-lead SPAK package.

Features

• Low 2mm profile SPAK package

• 3A continuous output current

• Wide 4V to 30V input voltage range (34V transient)

• Fixed 200kHz PWM operation

• Over 85 efficiency

• Output voltage adjustable to 1.235V

• All surface mount solution

• Internally compensated with fast transient response

• Over-current protection

• Frequency foldback short-circuit protection

• Thermal shutdown

Applications

• Point of load power supplies

• Simple high-efficiency step-down regulators

• 5V to 3.3V/2A conversion

• 12V to 5V/3.3V/2.5V/1.8V 3A conversion

• Dual-output ±5V conversion

• Base stations

• LCD power supplies

• Battery chargers