Power Management IC Designed For LCD PCs And Internet Appliances

The FAN5235 power management IC integrates three pulse-width modulated (PWM) switching regulator controllers and two linear regulator controllers to convert the 5.6V-to-24V power supplied by the adapter into the voltages used by the circuitry that surrounds the microprocessor in these systems. The two primary PWM controllers use synchronous-mode rectification to provide 3.3V and 5V at over 5A each switched out-of-phase to minimize input ripple-current. The third PWM controller generates an adjustable voltage at 150 mA. The IC also has two integrated linear regulators for stand-by, always-on power at 3.3V and 5V for light (50 mA) loads. Additional features include over-voltage, under-voltage, over-current monitors and thermal shutdown protection. The device is another product born from the company's joint development agreement with Intersil Corporation. The Intersil version is the ISL6235. Price for the FAN5235 is $3.25 each/1,000. FAIRCHILD SEMICONDUCTOR, San Jose, CA. (888) 522-5372.