Boost, flyback or SEPIC controller for high-temperature, 175C operation
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; www.linear.com/product/LTC1871X
next page; feature listing
Summary of Features: LTC1871X
100% tested at 175°C
±2% reference accuracy over –40°C to 175°C range
High efficiency (no sense resistor required)
Wide input voltage range: 2.5V to 36V
Current mode control provides excellent transient response
High maximum duty cycle (92% typ)
±2% RUN pin threshold with 100 mV hysteresis
Micropower shutdown: IQ = 10 μA
Programmable operating frequency (65 kHz to 900 kHz) with one external resistor
Synchronizable to an external clock up to 1.3 × fOSC
User-controlled pulse-skipping or burst mode operation
Internal 5.2V low dropout voltage regulator
Output overvoltage protection
Capable of operating with a sense resistor for high output voltage applications
Small 10-lead MSOP package
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