onsemi Voltage Regulators - DC DC Switching Regulators FAN5361UMP123X

The FAN5361UMP123X is a synchronous buck regulator capable of delivering a fixed output voltage of 1.233 V with an output current of up to 600 mA. It operates within an input voltage range of 2.3 V to 5.5 V and features a fixed frequency operation at 6 MHz, which allows for reduced external component sizes. The device achieves high efficiency, with peak efficiency reaching 92% and maintaining over 80% efficiency at low load currents of 1 mA. The regulator incorporates pulse frequency modulation (PFM) for light load conditions, resulting in a typical quiescent current of 35 µA, and can switch to fixed-frequency control under higher loads. It includes essential protection features such as input under-voltage lockout, thermal shutdown, and overload protection. The FAN5361UMP123X is available in a compact 6-lead, 2 x 2 mm ultra-thin molded leadless package (UMLP), making it suitable for space-constrained applications like cell phones, tablets, and gaming devices.