Microchip Technology, Inc. Voltage Regulators - DC DC Switching Regulators MIC4681YM

The MIC4681YM is a step-down (buck) voltage-mode switching regulator designed for efficient power management. It operates within an input voltage range of 4V to 30V and can deliver over 1A of continuous output current, with a peak capability of 2A, making it suitable for applications such as cellular phone battery chargers and power supplies. The device features a fixed operating frequency of 200kHz and requires only four external components for operation, simplifying design efforts. This regulator includes built-in protections such as cycle-by-cycle current limiting and thermal shutdown, ensuring reliability under fault conditions. In shutdown mode, it consumes less than 6¬µA of standby current. The MIC4681YM is housed in an 8-lead SOP package and is rated for a junction temperature range of -40¬8C to +125¬8C, making it versatile for various environmental conditions. Its efficiency can reach up to 90%, and it is internally compensated for fast transient response, which is beneficial for applications requiring quick load changes.