High-Voltage CAN/LIN System Basis Chip with Integrated Voltage Regulator: Microchip ATA6625C-GAQW

The increasing complexity of automotive electronic systems demands highly integrated and robust components that can operate reliably in harsh environments. Addressing this need, the Microchip ATA6625C-GAQW stands out as a premier System Basis Chip (SBC) designed to simplify and enhance in-vehicle networking. This device combines a CAN or LIN transceiver with a high-voltage, high-current power supply and an integrated voltage regulator, making it a cornerstone for modern automotive control units.

At its core, the ATA6625C-GAQW is engineered for high-voltage automotive applications. It features a built-in 5V/100mA low-dropout (LDO) voltage regulator that powers an external microcontroller or other local circuitry. This integration eliminates the need for a separate voltage regulator IC, thereby reducing the overall system component count, board space, and total cost. The chip operates from a nominal 12V supply but is built to withstand the rigorous demands of the automotive electrical environment, including load-dump pulses up to 40V and jump-start scenarios up to 28V.

The device includes a fully integrated LIN transceiver that is compliant with the LIN 2.x and SAE J2602 specifications. For systems requiring a CAN interface, a variant is available, highlighting the design's flexibility. The transceiver supports high-speed communication and features very low electromagnetic emission (EME) and high electromagnetic immunity (EMI), which are critical for passing stringent automotive EMC tests. A dedicated fail-safe output and comprehensive diagnostic capabilities allow for robust system monitoring and enhanced functional safety, aligning with goals for ASIL compliance.

A key advantage of this SBC is its suite of protection features. These include overtemperature shutdown, overvoltage protection on the VS supply pin, and undervoltage detection on both the battery supply and the internal voltage regulator. Furthermore, its very low current consumption in sleep mode (typically just 10µA) makes it an ideal solution for power-sensitive node applications, helping to extend battery life in always-on systems.

In application, the ATA6625C-GAQW is perfectly suited for use as an intelligent LIN node in body control modules, sensor interfaces, lighting systems, and door control units. Its high level of integration provides designers with a reliable, single-chip solution that accelerates development time and improves system reliability.

ICGOODFIND: The Microchip ATA6625C-GAQW is a highly integrated and robust System Basis Chip that excels in simplifying automotive network architecture. By merging a LIN/CAN transceiver, a voltage regulator, and extensive protection features into a single package, it offers designers a compact, cost-effective, and reliable solution for a wide range of body electronics applications, ensuring performance in the demanding automotive environment.

Keywords: System Basis Chip (SBC), LIN Transceiver, Voltage Regulator, Automotive Networking, Protection Features.