General Description

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.

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

Applications

• Battery chargers

• White LED drivers

• Constant voltage constant current step-down converters

• Simple step-down regulator with precise current limit

• USB power supplies