Tiny PMIC Optimized For Modern Smart Speakers

smart speaker

With the emergence of Internet of things (IoT) and smart home devices, smart speakers are quickly becoming one of the must-have devices in our homes. Modern smart speakers let you play music, turn on lights, get information on the weather, and even do video chat. Thus, smart speaker manufacturers are demanding powerful SoC (System on Chip) solutions for this increased functionality, along with smaller-size and lower-power circuitry to extend operating time and reduce solution size.

System PMIC For I.MX 8M Processors

Allowing longer operating time and smaller size in devices such as smart speakers, ROHM has unveiled a new programmable system power management IC (PMIC)  BD71837MWV optimized for use with NXP Semiconductors’ i.MX 8M family of applications processors. The i.MX 8M devices allow processing of audio, video, and graphics in a wide range of applications, from home audio/video to industrial automation and mobile computing.

BD71837MWV integrates all power rails required by i.MX 8M processors and system peripherals. In addition to a high-efficiency buck converter that provides a maximum conversion efficiency of 95%, most protection functions required by the system are included, making it possible to significantly reduce the development time, decrease size, and simplify system design, ROHM claims.

Key Benefits of the new PMIC:

  • Compact QFN package contributes to greater space savings and smaller BOM: The chip integrates all necessary power supply functions in a compact 8mm x 8mm 68-pin QFN package. ROHM claims that the PMIC requires 56 fewer parts compared with discrete solutions, reducing PCB area by up to 45%. In addition, 2-sided mounting enable all power management functions with less than 400mm2 board size.
  • Customizable based on system design: Software programmability and one-time programmability (OTP) allow the PMIC to be easily adapted for a wide variety of system designs.
  • Comprehensive support ensures fast design-in with minimal risks: The BD71837MWV operation has been verified with the i.MX 8M SoC, shortening development time and enabling timely product release.
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NXP’s i.MX 8M Processors


NXP’s i.MX 8M family integrates up to 4 Arm Cortex-A53 and Cortex-4 cores and offers flexible memory options along with a high-speed connectable user interface. Additional features include full 4K Ultra HD and HDR video functionality, high-fidelity audio playback, up to 20 audio channels, and support for DSD512 audio. This highly integrated design combines audio, video, and machine learning in order to provide seamless connectivity and an intuitive experience, according to the company.


Samples of the new device are expected to be available in June and OEM quantities should be available in October.

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