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SIMO PMIC Extends Battery Life for Wearables

Maxim Integrated has announced the MAX77654, a single inductor, multiple output (SIMO) power management IC (PMIC). This device provides 3 outputs with just one inductor at 91 percent efficiency. That’s 16 percent greater than traditional 4-chip systems, says Maxim. With significantly reduced solution size, system designers can pack more functionality in their applications such as wearables, hearables and other compact consumer devices when compared to using traditional power solutions.

As designers continue their quest to shrink form factors for compact consumer devices, they must also consider extending battery life (or shrinking battery volume), as well as reducing heat dissipation and noise, says Maxim. The MAX77654 SIMO PMIC addresses space-constraint challenges for system designers by replacing 3 buck-boost converters, 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 MAX77654 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 superior output voltage ripple performance of less than 20mVp-p for noise sensitive rails.

Key Advantages:

  • Smallest 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.

The MAX77654 is available at Maxim Integrated’s website for $2.00 (1000-up, FOB USA); also available from authorized distributors. The MAX77654EVKIT# evaluation kit is available for $105.

Maxim Integrated | www.maximintegrated.com

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