Linear Technology Corporationannounces the LT8616, a 42V input capable, high efficiency dual synchronous monolithic step-down switching regulator. Its dual channel design delivers independent 2.5A and 1.5A continuous current to outputs as low as 0.8V. A dual channel synchronous rectification topology delivers up to 95% 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. Switching frequency can be programmed from 200kHz to 3MHz and is synchronizable throughout this range.
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The LT8616’s 35ns minimum on-time enables 16Vin to 1.8Vout step-down 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 suited 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. Each channel of the LT8616 maintains a minimum dropout voltage of only 400mV (at 1A) under all conditions, enabling it to excel in scenarios such as automotive cold-crank. The LT8616’s 28-lead thermally enhanced TSSOP package and high switching frequency keeps external inductors and capacitors small, providing a compact, thermally efficient footprint.
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The LT8616 is available in a thermally enhanced 28-lead TSSOP package. Three temperature grades are available, with operation from -40 to 125 degrees C (junction) for the extended (E) and industrial (I) grades and a high temperature (H) grade of -40 to 150 degrees C. The 1,000 piece price starts at $4.15.
source: http://www.powerpulse.net/story.php?storyID=32191
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