General Description

The MIC4684 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 MIC4684 achieves 2A of continuous current in an 8-lead SO (small outline) package at 60°C ambient temperature.

Features

• SO-8 package with 2A continuous output current

• Over 85 efficiency

• Fixed 200kHz PWM operation

• Wide 4V to 30V input voltage range

• 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

• Simple high-efficiency step-down regulator

• 5V to 3.3V/1.7A converter (60°C ambient)

• 12V to 1.8V/2A converter (60°C ambient)

• On-card switching regulator

• Dual-output ±5V converter

• Battery charger