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Fairchild dc converter achieves >90 percent efficiency

Posted: 20 Sep 2002 ?? ?Print Version ?Bookmark and Share

Keywords:fairchild semiconductor? fan5660? dc/dc converter ic? dc converter ic? dc conversion ic?

The FAN5660 inductorless, dc/dc converter IC from Fairchild Semiconductor achieves >90 percent efficiency at full load with a typical operating current of 120?A, making it suitable for use in portable and system voltage conversions.

The 8-lead SOIC device can be used with two low-cost capacitors, allowing its 100mA output to replace switching regulators, eliminating inductors and their associated cost, size, and EMI.

The FAN5660 inverts a 1.5V to 5.5V input to a corresponding -1.5V to -5.5V output. Also, the IC can split or double a full load, 5 input voltage, of a power supply or battery, providing 2.25V in splitter mode and 9.5V in doubler mode.

It also equipped with an onboard oscillator circuit that can operate at either low or high frequencies. When selecting the low, 5kHz operating frequency, a low quiescent current will result. A smaller capacitor can be used at the higher, 50kHz operating frequency.

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