TI’s new Vin DC/DC controller features industry’s highest 65-V operation

Texas Instruments introduces a 2.2-MHz, dual-channel synchronous buck converter. Integrated with unique set of features which significantly reduces electromagnetic interference (EMI) and high-frequency noise in high-voltage DC/DC step-down applications such as automotive infotainment and high-end cluster power-supply systems.

Together with TI’s WEBENCH Automotive Design tool, the LM5140-Q1 enables engineers to get their automotive designs to market faster.

The LM5140-Q1 controller includes dual outputs with phase interleaving and is offered in wettable flank packaging that speeds manufacturing.

Key Features and Benefits:

• Wide 3.8-V to 65-V operating range handles start-stop and load-dump conditions for 12-V/24-V lead-acid and emerging 48-V Lithium-ion automotive batteries.
• 2-MHz operation with external synchronization capability moves switching noise above the sensitive AM band, eliminating the need for frequency hopping.
• Unique, adjustable gate-drive slew-rate control reduces EMI emissions by up to 10 dB with less than a 1 percent reduction in efficiency, which reduces external EMI filtering, saves printed circuit board (PCB) area, and simplifies compliance with CISPR 25 automotive EMI requirements.
• Low 35-uA quiescent current (I_Q) in standby (one channel operating with no load) extends battery life in “always on” applications.
• Wettable flank packaging enables post-solder visual inspection to speed manufacturing.

The company touts that the LM5140-Q1 will join the recently released LM53600-Q1, LM53601-Q1, LM53602-Q1 and LM53603-Q1 buck converters to create a complete family of controllers and converters designed for automotive systems that draw from less than 1 A of power to more than 10 A. All of these devices feature greater than 2-MHz switching frequency, low operating I_Q and EMI reduction features.