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Next-generation SIMO power management IC targets wearables and hearables

Maxim Integrated Products has unveiled the MAX77654 single inductor, multiple output (SIMO) power management IC (PMIC).

This PMIC will enable designers of compact consumer devices to radically cut solution sizes by half and extend battery life by 20 percent, according to the company.

This SIMO PMIC is able to deliver 3 outputs with just one inductor at 91 percent efficiency, which is 16 percent greater than traditional 4-chip systems. With significantly reduced solution size, system designers will now be able to pack more functionality into applications such as wearables, hearables and other consumer devices when compared to using traditional power solutions.

The MAX77654 builds on the company's portfolio of SIMO PMICs.

As designers look to reduce form factors for compact consumer devices, they are also having to consider extending battery life (or shrinking battery volume), as well as reducing heat dissipation and noise. The MAX77654 SIMO PMIC addresses this by replacing 3 buck-boost converters and 3 inductors with a single converter and a single inductor. It also replaces 2 LDOs/load-switches, a battery charger and additional passives, resulting in a 50 percent smaller solution.

The device improves end-user experience with 20 percent longer battery life by delivering 91 percent efficiency. With less than 500nA shutdown current and a low supply current of 6µA with 5 regulators operating, designers can add more functions to their ultra-low-power consumer devices. The MAX77654 yields lower heat dissipation and reduces system board temperature by more than 20 degrees Celsius when compared against an alternative single inductor system power solution.

Additionally, this SIMO PMIC provides an output voltage ripple performance of less than 20mVp-p for noise sensitive rails.


Key Advantages

  • Small Solution Size: Highly integrated, three-output buck-boost converter delivers a 19mm² solution size that is 50 percent smaller than traditional discrete solutions. It consists of a SIMO PMIC, nine capacitors and an inductor.
  • Longer Battery Life: With 91 percent efficiency, as well as 500nA shutdown current and 6µA supply current, this solution provides 20 percent longer battery life and 7 times lower heat dissipation compared to discrete solutions.
  • Cost-Effective Solution: Offers up to 40 percent fewer components and 23 percent lower BOM cost compared to discrete solutions.

Author
Neil Tyler

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