White Paper: Automotive

Improve Your Automotive ECU Design with a Low-IQ Buck Converter


High-end cars require close to a hundred electronic control units (ECUs), each taking power from the car battery with the intermediation of an on-board buck converter. Many ECUs must remain in standby mode even when the ignition key is off. Their standby currents add up, increasing the rate of discharge of the car battery. Accordingly, the quiescent current specification for these units is getting tougher to meet. The ECU buck converter must meet many other challenges inherent to the automotive environment. This article reviews the challenges of designing an ECU buck converter, from low quiescent current and low noise to high reliability.

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