onsemi Special Purpose Regulators FAN5091MTCX

The FAN5091MTCX is a synchronous multi-slice DC-DC controller IC designed for high-performance processors, providing a programmable output voltage range from 1.10V to 1.85V in 25mV steps with 1% accuracy. It features two interleaved synchronous buck regulator slices that operate 180¬8 out of phase, ensuring fast transient response and minimizing external component requirements. The device includes built-in current sharing, remote voltage sensing, and Programmable Active Droop for enhanced performance. With a response time of 100ns, the FAN5091MTCX is optimized for 5V operation and supports a programmable switching frequency from 200kHz to 2MHz. It integrates high-current gate drivers and essential functions such as Power Good, under-voltage lockout, over-voltage protection, and adjustable current limiting. The product is housed in a 24-pin TSSOP package and is suitable for applications including power supplies for Intel Pentium IV and AMD Athlon processors.