No RSENSE 60V Boost Controller Operates over a -40°C to 150°C Junction Temperature

Date
04/08/2011

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-40°C to 150°C Operating Temperature Boost Controller

Linear Technology Corporation announces the H-grade version of the LTC3872, a small footprint 550kHz fixed frequency step-up DC/DC controller that is specified over a -40°C to150°C junction temperature range. The LTC3872 accepts a 2.5V to 9.8V input voltage range and can produce an output voltage as high as 60V without needing a sense resistor. By using a sense resistor, the output voltage is limited only by the external components. Capable of driving large N-channel MOSFETs, the LTC3872 can produce high peak output currents. When powered with a 5V bias voltage, the switch can go up to 60V, making it well suited for automotive, heavy equipment and industrial control applications. The LTC3872 current-mode architecture provides cycle-by-cycle current limiting and excellent transient response. Pulse skipping operation at light loads reduces the quiescent current to 250uA which helps extend the run-time in the battery-powered applications during standby mode. Additional features include an internal soft start, adjustable current limit, precision undervoltage lockout and tight 1.6% reference voltage accuracy over the full -40°C to 150°C operating temperature range. Summary of Features: LTC3872H • VOUT up to 60V without Sense Resistor • VIN Range: 2.75V to 9.8V • Constant Frequency 550kHz Operation • Adjustable Current Limit • Pulse Skipping at Light Load • Internal Soft-Start & Optional External Soft-Start • 1.6% Reference Voltage Accuracy • Current-Mode Control • Thermally Enhanced 2mm x 3mm DFN-8 & ThinSOT™ Packages The LTC3872H is offered in a thermally enhanced 2mm x 3mm DFN-8 package and 8-lead ThinSOTTM package. For more information, visit www.linear.com/product/LTC3872

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