New DC-DC converter for inputs ranging from a single-cell Li-Ion to automotive

Linear Technology has announced the LT8330, a current-mode, 2MHz step-up DC-DC converter with an internal 1A, 60V switch. It operates from an input voltage range of 3V to 40V, making it suitable for applications with input sources ranging from a single-cell Li-Ion to automotive inputs. The LT8330 can be configured as either a boost, SEPIC or an inverting converter. It utilizes 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 or TSOT-23 package and tiny externals ensures a very compact footprint while minimizing solution cost, says the company. The LT8330’s 330mohm switch delivers efficiencies of up to 90%. An accurate 1.6V EN/UVLO pin threshold allows under-voltage lockout (UVLO) to be programmed for optimal system performance. A single feedback pin enables programming of positive or negative output voltages. Other features include internal compensation, soft-start, frequency fold-back and thermal shutdown protection. The LT8330EDD is available in a 3mm x 2mm DFN-8 package and the LT8330ES6 is offered in a TSOT-23 package. Industrial- temperature (-40C to 125C) versions, the LT8330IDD and the LT8330IS6, and high-temperature (-40C to 150C) versions, the LT8330HDD and the LT8330HS6, are also available.