DC-DC converter avoids interference problems in multiple topologies

July 11, 2016 // By Nick Flaherty
LT8335
Linear Technology has launched a current mode, 2MHz step-up DC-DC converter with an internal 2A, 28V switch.

The LT8335 operates from an input voltage range of 3V to 25V, suitable for applications with input sources ranging from a single-cell Li-Ion to automotive inputs. It can be configured as either a boost, SEPIC or an inverting converter and uses a fixed 2MHz switching frequency, enabling designers to minimize external component sizes and avoid critical frequency bands, such as AM radio. Burst Mode operation reduces quiescent current to only 6µA while keeping output ripple below 15mVP-P. The combination of a 3mm x 2mm DFN package and tiny externals ensures a very compact footprint while minimizing solution cost.

The LT8335’s 170mΩ switch has an efficiency of over 90%, while programmable undervoltage lockout (UVLO) optimizes system performance. A single feedback resistor sets the output voltage whether the output is positive or negative, minimizing external components. Other features include internal compensation, soft-start, frequency foldback and thermal shutdown protection.

The LT8335EDDB is available in a 3mm x 2mm DFN-8 package and an industrial temperature (–40°C to 125°C) version, the LT8335IDDB, is also available. Pricing starts at $2.55 each for 1,000 piece quantities

For more information, visit www.linear.com/product/LT8335.