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Step-down converter suits systems with USB

Posted: 31 Mar 2008 ?? ?Print Version ?Bookmark and Share

Keywords:step-down converter? USB? synchronous converter?

Exar Corp. has introduced a synchronous inductive step-down converter dubbed the SP6669, which is capable of delivering up to 600mA and achieving output voltages as low as 0.6V.

The device is well-suited for portable devices with a USB interface, including digital cameras, portable media players and wireless networking amongst others.

Operating at a fixed internal switching frequency of 1.5MHz, the SP6669 can reach 95 percent efficiency. Its output voltage can be set as low as 0.6V or 1.5V and 1.8V for the fixed output versions, which can be achieved from any input voltages from 2.5V to 5.5V. This synchronous converter offers tight 0.4 percent/V and 0.5 percent of line and load regulations.

Pricing in 1,000-piece quantities for the SP6669 (SOT-23-5 package) is 49 cents. Samples are available now in a -40C to 85C temperature range.

- Ismini Scouras

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