Linear Technology Corporation rolled out the LT8610AX, a 3.5A, 42V input capable synchronous step-down switching regulator, which operates in ambient temperatures up to 175°C. Synchronous rectification delivers efficiency as high as 95% while Burst Mode® operation keeps quiescent current under 3.5µA in no-load standby conditions. Its 3.7V to 42V input voltage range is ideal for high temperature applications such as down-hole drilling equipment with power sources ranging from 5V to 40V. The LT8610AX’s electrical parameters are 100% tested at 175°C, offering a VREF accuracy of 2% over the entire -40°C to 175°C temperature range. At ambient temperatures of 175°C, the LT8610AX offers over 90% efficiency (for 12VIN to 3.3VOUT conversions) over a wide load current range of 10mA to 1A, ideal for battery powered applications commonly found in down-hole drilling systems. The LT8610AX’s Burst Mode operation offers ultralow quiescent current, well suited for applications requiring extended operating battery life. The LT8610AX’s 16-lead thermally enhanced MSOP package provides a compact, thermally efficient footprint.
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