MIC4682YM

The MIC4682 is an easy-to-use step-down (buck) switchmode voltage regulator. It features a programmable current limit that allows 10% current limit accuracy over its full operating temperature range. The precision current limit makes the MIC4682 ideal for constant-voltage constant-current applications, such as simple battery chargers. The precision current limit also gives designers the ability to set the maximum output current below the saturation current rating of the inductor. This allows the use of the smallest possible inductors for a given application, saving valuable space and cost. The MIC4682 is a very robust device. Its 4V to 34V input voltage range allows the MIC4682 to safely be used in applications where voltage transients may be present. Additional protection features include cycle-by-cycle current limiting and over-temperature shutdown. The MIC4682 is available in a thermally optimized power SOIC-8 package that allows it to achieve 2A of continuous output current. The MIC4682 requires a minimum number of external components and can operate using a standard series of inductors. Compensation is provided internally for fast transient response and ease of use. The MIC4682 is available in the 8-pin power SOIC with a -40°C to +125°C junction temperature range.

Applications

• Battery chargers
• White LED drivers
• Constant voltage constant current step-down converters
• Simple step-down regulator with precise current limit
• USB power supplies

Key features

• Programmable output current limit – 10% accuracy over temperature
• Wide 4V to 34V operating input voltage range
• Fixed 200kHz PWM operation
• Power SOIC-8 package allows 2A continuous output current
• All surface mount solution
• Internally compensated
• Less than 1μA typical shutdown-mode current
• Thermal shutdown protection