Low EMI DC/DC regulator helps engineers meet ever-tightening OEM standards

Allegro MicroSystems, a global leader in power and sensing solutions for motion control and energy efficient systems, announced the launch of the ARG81800—a robust, ultra-low Iq, low EMI DC/DC regulator ideal for keep-alive supply applications. The device sets a new standard, introducing features that help engineers easily achieve tightening OEM standards, such as:

  • Ultra-low quiescent current mode
  • 150°C operating temperature – for demanding automotive or industrial operating conditions
  • Pin open/short and component faults
  • Unique EMC reductions achieved by incorporating Spread Spectrum frequency modulation (dithering) to a non-dithered external SYNC clock as well as providing a dithered clock output to be used for other converters in the system

“The ARG81800 is at the forefront of technology,” explains Mark Gaboriault, Marketing Director at Allegro. “The features that we have added solve real-world challenges for our customers.”

Pass the “airport test”

As electrical content in cars continues to increase, so does the continuous draw of keep-alive systems on the battery. Components must be able to pass the “airport test”—drawing as little current as possible so that the battery can still start the car after an extended period (such as a holiday). Similarly, battery operated industrial systems must limit battery drain to extend service period.

The ARG81800 DC/DC regulator draws just 8 μA, from VIN while regulating 3.3V or 5.0 Vout at no load. In comparison to the typical ~100uA budgeted for automotive battery-powered subsystems, this low Iq solution frees up significant overhead to be allocated to other current draws that may occur in the system, allowing more design margin.

Visit www.allegromicro.com.

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