Power Electronics

No RSENSE 60V 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. The LTC3872H is offered in a thermally enhanced 2mm × 3mm DFN-8 package and 8-lead ThinSOT™ package. 1,000-piece pricing starts at $2.35 each.
Linear Technology
Milpitas, CA


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