Torex Semiconductor, Ltd. Voltage Regulators - DC DC Switching Regulators XC9281B21E1R-G

The XC9281B21E1R-G is a synchronous rectification DC/DC converter designed for step-down applications, capable of delivering an output current of 600mA. It operates within an input voltage range of 2.5V to 5.5V and offers a fixed output voltage of 2.1V with a tolerance of ±2.0%. The device utilizes HiSAT-COT control technology, which enhances transient response and minimizes output voltage fluctuations during load changes, making it suitable for applications requiring stable power supply, such as mobile devices and wearables. The XC9281B21E1R-G features a high oscillation frequency of 4MHz or 6MHz, allowing for the use of compact inductors and capacitors, thus reducing the overall PCB area to as little as 3.52 mm². The quiescent current is low at 11OºA, contributing to its efficiency, which can reach up to 90% under specific conditions. The device includes protection features such as current limit, soft-start, and under-voltage lockout (UVLO). It is packaged in a compact LGA-6B01 format, measuring 1.2 x 1.2 x 0.3mm, and is compliant with EU RoHS standards. This product is particularly well-suited for battery-powered applications where space and efficiency are critical.