General Description

The MIC4690 SuperSwitcher™ is an easy-to-use, 500kHz step-down PWM voltage regulator. The MIC4690 achieves over 1A of continuous output current over a wide input voltage range in an 8-lead SO (small outline) package.
The high switching frequency of the MIC4690 allows the smallest surface-mount inductors and capacitors to be used. Internal compensation ensures fast transient response and a minimum amount of external components.

Features

• SO-8 package with over 1A output current
• Fixed 500kHz operation
• Wide 4V to 34Vinput voltage range
• Output voltage adjustable to 1.23V
• All surface mount solution
• Internally compensated with fast transient response
• Up to 85% efficiency
• Overcurrent protection
• Frequency foldback short-circuit protection
• Thermal shutdown

Applications

• Simple 1A step-down (buck) regulator
• Replacement of TO-220 and TO-263 designs
• 12V to 5V/3.3V/2.5V/1.8V/1.5V conversion
• 5V to 2.5V/1.8V/1.5V conversion
• On-card switching regulators
• Hard disk drives
• Cable modems
• Positive-to-negative converters
• Simple battery chargers