Fairchild's New Power Management IC Provides Low-Cost, Space-Saving Solution For LCD PCs and Internet Appliances

Business Wire, April 27, 2001

Business Editors & High-Tech Writers

SAN JOSE, Calif.--(BUSINESS WIRE)--April 27, 2001

Fairchild Semiconductor (NYSE:FCS) introduces a new high-efficiency power-management IC designed specifically for LCD PCs, Internet Appliances and other similar devices powered by a notebook PC type of power adapter.

The FAN5235 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 result is a low cost, space saving solution.

The two primary PWM controllers in the FAN5235 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 150mA (default is 12V). A proprietary technique is used for sensing output current using the RDS(on) of the external MOSFETs, instead of external current sense resistors, which saves board space and reduces system cost.

The FAN5235 also has two integrated linear regulators for stand-by ALWAYS-ON power at 3.3V and 5V for light (50mA) loads; ideal for circuitry that needs to retain information and keep working when the rest of the system is powered down. Additional FAN5235 features include over-voltage, under-voltage, over-current monitors and thermal shutdown protection. A single Power-Good signal is issued when soft start is completed and all outputs have reached 90% of their final value.

The FAN5235 is another product born from the previously announced joint development agreement between Fairchild and Intersil Corp. to provide customers assurance of supply. The Intersil version is the ISL6235.

          Price:                    US$3.25 each (1,000 pcs)
          Availability:             Now
          Delivery:                 7-8 weeks ARO

For more information, contact Fairchild Semiconductor Customer Support Group at 888/522-5372, fax 972/910-8036 or visit Fairchild's Web site at www.fairchildsemi.com. Editor's note: PDF of the datasheet for this product is available at www.fairchildsemi.com/pf/FA/FAN5235.html. Contact pr@welcomm.com for a product image.

About Fairchild Semiconductor

Fairchild Semiconductor International (NYSE:FCS) is a leading global supplier of high performance products for multiple end markets. With a focus on developing leading edge power and interface solutions to enable the electronics of today and tomorrow, Fairchild's components are used in computing, communications, consumer, industrial, automotive and aerospace applications. Fairchild's 11,500 employees design, manufacture and market power, analog & mixed signal, interface, logic, and optoelectronics products from its headquarters in South Portland, Maine, USA and numerous locations around the world. Please contact us on the Web at www.fairchildsemi.com.