DC-DC Converter extends battery life in portable applications.

Press Release Summary:




Inductorless, 100 mA FAN5660 converter achieves over 90% efficiency at full load with typical operating current of 120 µA. It inverts +l.5 V to +5.5 V input to corresponding -l.5 V to -5.5 V output. Unit can also split or double full load, +5.0V input voltage, of power supply or battery, providing +2.25 V in splitter mode and +9.5 V in doubler mode. Equipped with onboard oscillator circuit, device allows flexibility in selecting appropriate operating frequencies.



Original Press Release:



Highly Efficient, Inductorless DC-DC Converter from Fairchild Semiconductor Lowers Part Count and Extends Battery Life In Portable/Handheld Applications



San Jose, Calif-September 17, 2002-Fairchild Semiconductor International (NYSE: FCS) introduces an inductorless, 100mA DC-DC converter that has greater than 90% efficiency, making it ideally suitable for portable and system voltage conversions. Achieving over 90% efficiency at full load with a typical operating current of just 120µA, the FAN5660 is one of the best-performing products of this type. Using only two low-cost capacitors, the charge-pump's 100mA output replaces switching regulators, eliminating inductors and their associated cost, size and EMI. The FAN5660 inverts a +l.5V to +5.5V input to a corresponding -l.5V to -5.5V output. Also, this new DC-DC converter can split or double a full load, +5.0V input voltage, of a power supply or battery, providing +2.25V in splitter mode and +9.5V in doubler mode.

"The introduction of the FAN5660 supports our power management strategy of offering highly efficient power conversion solutions to our customers," said Tivadar Szabo, Manager of Ultra Portable Products in Fairchild's Power Management Group. "The FAN5660, with its high conversion efficiency at full load, optimizes battery life in portable and handheld applications."

Equipped with an onboard oscillator circuit, the FAN5660 charge pump allows flexibility in selecting appropriate operating frequencies. The oscillator can operate at either low or high frequencies. When selecting the low, 5kHz operating frequency, a very low quiescent current will result. A smaller capacitor can be used at the higher, 50kHz operating frequency. The FAN5660 can operate in three modes: inverter, splitter or doubler. As an inverter, it converts the input voltage in a range of 1.5V to 5.5V to a corresponding negative value. In voltage splitter mode it splits the input voltage in half, and in voltage doubler mode, it doubles the input voltage. Because the FAN5660 does not require an external diode in voltage doubler mode, it occupies less PCB area in designs. The FAN5660 is provided in the space-saving 8-lead SOIC package.

This product complements Fairchild's broad range of inductor-based switching regulators, giving designers more flexibility and choice in their DC-DC conversion designs.

Price: FAN5660 U.S. $1.61 (1,000 pcs.)
Availability: Now
Delivery: 8 weeks ARO

For more information, contact Fairchild Semiconductor's Customer Support Center at (888) 522-5372, fax (972) 910-8036, or visit Fairchild's website at www.fairchildsemi.com.

Fairchild Semiconductor International:
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 and automotive applications. Fairchild's 10,000 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 wwvw.fairchildsemi.com.

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