Boost, flyback or SEPIC controller for high-temperature, 175C operation

April 21, 2017 //By Graham Prophet
Boost, flyback or SEPIC controller for high-temperature, 175C operation
LTC1871X is a wide input range, current mode, boost, flyback or SEPIC controller that drives an N-channel power MOSFET and requires few external components. Intended for low to medium power applications, it eliminates the need for an external current sense resistor, sensing current using the power MOSFET’s on-resistance, thereby maximizing efficiency. The LTC1871X’s design is optimized for high temperature environments up to 175°C.

Its 2.5V to 36V input voltage range is intended for high temperature applications such as oil exploration drilling equipment with power sources ranging from 3V to 36V. The LTC1871X’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. The LTC1871X’s flexibility for use in boost, SEPIC or flyback topologies is suitable for a range of battery-powered applications commonly found in downhole drilling applications. Its Burst Mode operation offers low quiescent current, for applications that require extended operating battery life. Specialized Cu/Ni/Au bond pad plating ensures long life in high temperature environments while an MSOP-10 package offers a highly compact solution footprint.


It is priced at $125.00 (1,000).


Analog Devices/Linear Technology;


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