FAN5234 Datasheet | onsemi

Dual Mobile-Friendly PWM/PFM Controller Description The FAN5234 PWM controller provides high efficiency and regulation with an adjustable output from 0.9 V to 5.5 V required to power I/O, chip- sets, memory banks, or peripherals in high- performance notebook puters, PDAs, and Internet appliances. Synchronous rectification and hysteretic operation at light loads contribute to a high efficiency over a wide range of loads. The Hysteretic Mode of operation can be disabled if PWM Mode is desired for all load levels. Efficiency is further enhanced by using the MOSFET’s RDS(ON) as a current- sense ponent. Feed- forward ramp modulation, average current mode control, and internal...