Linear Technology’s LTC3863 is a high voltage inverting dc/dc controller that uses a single inductor to produce a negative voltage from a positive input voltage with all of its interface signals being positive ground referenced. Operating over a 3.5 V to 60 V input supply range, the controller is designed to protect against high voltage transients, to operate continuously during automotive cold crank, and to cover a broad range of input sources and battery chemistries. The output voltage can be set from -0.4 V to -150 V or lower at up to 3 A typical, suiting it for use in 12 V or 24 V automotive, heavy equipment, industrial control, robotic and telecom applications. The controller drives an external P-channel MOSFET, operates with a selectable fixed frequency between 50 and 850 kHz, and is synchronizable to an external clock from 75 to 750 kHz. Offered in 12-pin thermally enhanced MSOP and 3 x 4 mm QFN packages, the LTC3863E and LTC3863I versions operate from a -40°C to 125°C junction temperature, while the H grade is guaranteed to operate from a -40°C to 150°C, and the MP version from -55°C to 150°C. Pricing starts at $2.06 each/1,000.
60 V, Low IQ Inverting DC/DC Controller Simplifies Design
Controller drives an external P-channel MOSFET, operates with a selectable fixed frequency between 50 and 850 kHz, and is synchronizable to an external clock from 75 to 750 kHz.