DC-DC converter minimises design footprint

Louise Smyth

Linear Technology has launched a current mode, 2MHz step-up DC-DC converter IC with an internal 2A, 28V switch for use with single cell lithium ion batteries or automotive power supplies.

The LT8335 operates from an input voltage range of 3V to 25V and can be configured as either a boost, a single ended primary inductor converter (SEPIC) or an inverting converter. It uses a fixed 2MHz switching frequency, enabling designers to minimise external component sizes and avoid critical frequency bands, such as AM radio.

Linear’s Burst Mode operation reduces quiescent current to only 6µA while keeping output ripple below 15mVP-P while the combination of a 3mm x 2mm DFN package and small external components allows for a compact footprint while minimising solution cost.

The LT8335’s 170mΩ switch delivers efficiencies of over 90%, while programmable undervoltage lockout (UVLO) optimises system performance. A single feedback resistor sets the output voltage whether the output is positive or negative, minimising 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. An industrial temperature (-40°C to 125°C) version, the LT8335IDDB, is also available.