Microchip Technology, Inc. Voltage Regulators - DC DC Switching Regulators MIC26903-ZAYJL-TR

The MIC26903-ZAYJL-TR is a synchronous buck regulator designed for efficient DC-to-DC conversion, capable of handling input voltages from 4.5V to 28V and delivering an adjustable output voltage ranging from 0.6V to 5.5V with a maximum output current of 9A. It operates at a fixed switching frequency of 600kHz and features Micrel's Hyper Speed Control architecture, which enhances transient response while minimizing output capacitance. The device includes several protection features such as undervoltage lockout, internal soft-start, foldback current limit, and thermal shutdown, ensuring reliable operation under various conditions. The regulator is packaged in a compact 28-pin QFN format and is suitable for applications in distributed power systems, telecom infrastructure, and consumer electronics.