Buck-boost converter offers 2.7 to 40-V range

Buck-boost converter offers 2.7 to 40-V range

The LTC3115-1, a synchronous buck-boost dc/dc converter delivers up to 2-A continuous output for single-cell Li-ion, 24/28-V industrial rails, and 40-V automotive inputs. The converter’s 2.7 to 40-V input and output range provides a regulated output with inputs above, below, or equal to the regulated output.

The buck-boost topology provides a continuous, jitter-free transition between buck and boost modes, making it suitable for RF and other noise-sensitive applications. The switching frequency is user programmable between 100 kHz and 2 MHz, and can be synchronized to an external clock. The device incorporates four internal low RDS(on) n-channel MOSFETs to deliver efficiencies of up to 95%. A user-selectable burst-mode operation lowers quiescent current to 50 µA, to improve light load efficiency. (Ea/1,000: LTC3115EDHD-1, $5.35; thermally enhanced LTC3115EFE-1, $5.55 — available now.)

By Paul O’Shea

Linear Technology , Milpitas , CA
Sales Office 408-428-2050
www.linear.com