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Amplifiers/Converters??

DC/DC converter features internal 2A/42V switch

Posted: 08 Oct 2007 ?? ?Print Version ?Bookmark and Share

Keywords:power management IC? step up DC/DC converter?

Linear Technology Corp. has announced a current mode, fixed frequency step-up DC/DC converter with an internal 2A, 42V switch. The LT3580 operates from an input voltage range of 2.5-32V, making it suitable for a wide range of applications, from a single-cell Li-ion to automotive inputs. It can be configured as either a boost, SEPIC or an inverting converter. The converter's switching frequency can be programmed between 200kHz and 2.5MHz, using either a single resistor, or by synchronizing it to an external clock. Designers are therefore able to minimize external component sizes and avoid "noise critical" frequency bands. The 3mm x 3mm DFN package (or MSOP-8E) is combined with tiny externals to ensure a very compact footprint while minimizing cost.

The LT3580 has a low VCESAT switch, 0.3V at 1.5A, that delivers up to 89 percent efficiency. Undervoltage lockout is user adjustable for optimal system performance. A single feedback resistor sets the output voltage, minimizing external components. Other features include external synchronization capability, internal soft-start and thermal shutdown protection.

The LT3580EDD is available in a 3mm x 3mm DFN-8 package. Pricing starts at $2 each for 1,000-piece quantities. The LT3580MS8E is also available in a thermally enhanced MSOP-8 package. Pricing starts at $2.10 each for 1,000-piece quantities.

Industrial temperature (-40C to 125C) versions, the LT3580IDD and the LT3580IMS8E, are also available from stock. Pricing starts at $2.40 and $2.52 each, respectively, for 1,000-piece quantities.




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