onsemi PMIC - PMIC - Voltage Regulators - DCDC Switching Regulators - FAN5665UCX FAN5665UCX

The FAN5665UCX is a 5V switched capacitor step-up DC/DC converter designed for applications requiring a regulated output voltage from a range of input voltages between 2.9V and 5.5V. It features a maximum output current of 30mA and utilizes switch reconfiguration and fractional switching techniques to achieve high efficiency, with reported efficiencies up to 92%. This device operates with minimal external components, requiring only flying capacitors of 0.22¬µF, and supports low-noise, constant-frequency operation at 1.2MHz under heavy loads, while maintaining high efficiency at light loads. The FAN5665UCX includes built-in protections such as under-voltage lockout, short-circuit protection, and thermal shutdown, ensuring reliable operation across its specified temperature range of -40¬8C to +85¬8C. The product is packaged in an 8-bump WLCSP format, measuring 1.21mm x 1.21mm with a 0.4mm pitch, making it suitable for space-constrained applications like USB I/O supply regulators, cell phones, and portable electronic devices.