FAN53611AUC18X

FAN53611AUC18X is a multi-rail, highly integrated DC-DC power-management IC from the FAN family. In a compact 18-pin package (AUC18X), it provides multiple synchronous buck regulators with programmable outputs, designed to generate core and peripheral rails from a single supply. It supports digital control (I2C) for voltage sequencing and monitoring, soft-start, enable control, and power-good signaling. It also includes protection features such as overcurrent, overvoltage, undervoltage lockout and thermal shutdown. Benefits include reduced BOM, smaller PCB area, fast transient response, and high efficiency over a broad load range. Typical applications include portable and embedded systems (SoC cores, memory and I/O rails), compact motherboards and other multi-rail power requirements. Exact rail count, input range, supported output voltages, and pinout vary by variant; consult the latest datasheet/product page for specifics on AUC18X.

- Pin count: 18 pins (18-pin package).
- Function: High-efficiency DC-DC converter (buck regulator) with integrated power MOSFETs, used to step down a higher input voltage to a regulated output for portable electronics.

Manufacturer: ON Semiconductor (the Fairchild Semiconductor brand; Fairchild was acquired by ON Semiconductor in 2016).
What kind of company: A global (multinational) semiconductor company that designs, manufactures, and sells electronic components and integrated circuits, including power-management ICs, discretes, sensors, and logic.

FAN53611AUC18X is a multi‑channel LED backlight driver with DC–DC conversion. Typical applications include:
- LCD backlights for displays in notebooks, tablets, monitors and TVs
- Multi‑channel white‑LED lighting in portable devices and signage
- Power‑efficient LED driver from battery or USB (boost/buck‑boost) with precise per‑channel current regulation
- Compact lighting solutions in consumer electronics requiring high efficiency and closed‑loop LED current control

18-pin QFN package with an exposed pad.