Recently, a new dual channel synchronous monolithic step-down switching regulator for automotive application was launched by Linear Technology. Its dual channel design delivers independent 2.5A and 1.5A continuous current to outputs as low as 0.8V. Each channel switches 180 degrees outofphase to reduce output ripple. Also, each channel has a separate input for added design flexibility. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping output ripple below 15mV. A dual channel synchronous rectification topology delivers up to 95 per cent efficiency while Burst Mode operation keeps quiescent current under 6.5µA (both channels enabled) in no load standby conditions, making it ideal for always on systems.
According to the press release, “The LT8616’s 35ns minimum ontime enables 16V to 1.8V stepdown conversions; while switching at 2MHz helps designers avoid critical noise sensitive frequency bands, such as AM radio while having a very compact solution footprint. Its 3.4V to 42V input voltage range makes it ideal for automotive applications which must regulate through cold crank and stop start scenarios with minimum input voltages as low as 3.4V and load dump transients in excess of 40V. The switching frequency can be programmed from 200kHz to 3MHz and is synchronisable throughout this range.” The release also states that each channel of the LT8616 maintains a minimum dropout voltage of only 400mV (at1A) under all conditions, enabling it to excel in scenarios such as automotive coldcrank. Adding further, the converter is available in three temperature grades, with operation from 40°C to 125°C (junction) for the extended (E) and industrial (I) grades and a high temperature (H) grade of 40°C to 150°C.
In reference to the release the 1000 pieces of LT8616 is priced at US$ 4.15 and is available globally.