Convertor is flexible about input voltage

The LT3479 is a current mode, fixed frequency step-up DC/DC convertor with an internal 3A, 42V switch.

The LT3479 is a current mode, fixed frequency step-up DC/DC convertor with an internal 3A, 42V switch.

It operates from an input voltage range of 2.5 to 24V making it suitable for applications with input sources ranging from a single cell Li-ion to a 20V wall adapter.

Both inputs of the error amplifier are available to the user, permitting use as a boost convertor or an inverter.

Its 42V switch enables outputs as large as +40V.

It can also drive two high current white LEDs (in series) with current as high as 700mA from a single Li-ion cell.

In addition, its switching frequency can be programmed, via a single resistor, between 300kHz and 3.5MHz, enabling the designer to minimise external component sizes and avoid "noise critical" frequency bands in the system.

A tiny/low profile inductor and ceramic capacitors keep solution footprints very compact while minimising solution cost.

The LT3479's low-saturation-voltage switch, 0.3V at 2.5A, delivers efficiencies of up to 89%.

The device features a programmable soft-start function to limit inductor current during startup as well as inrush current protection to protect the LT3479 during shorts and line transients.

The low profile (0.75mm) 14-pin, 4 x 3mm DFN-14 package provides excellent thermal performance in a small footprint.

The LT3479 is also available in a thermally enhanced 16-pin TSSOP.

Both the LT3479EDE in a 4 x 3mm DFN-14 package and the LT3479EPE TSSOP-16E version are available from stock.

Pricing for both package options starts at $3.00 each for 1000-piece quantities.

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