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Tiny PMIC Enables 4x Faster Wearable Charging

Analog Devices (formerly Maxim Integrated) has announced its new MAX77659, a single-inductor multiple output (SIMO) power management IC (PMIC) with integrated switch-mode buck-boost charger. The devices charges wearables, hearables and Internet of Things (IoT) devices faster and in less space than any other PMIC available today, claims the company. The MAX77659 SIMO PMIC delivers over four hours of play time after a short, ten-minute charge, and uses a single inductor to power multiple rails, reducing the bill of materials (BOM) by 60 percent and shrinking total solution size by 50 percent.

The MAX77659 SIMO PMIC integrates a switch-mode buck-boost charger and three independently programmable buck-boost regulators, all sharing a single inductor to minimize total solution size. The regulators extend battery life by operating at 91% efficiency during moderate to heavy load conditions while consuming only 5µA of quiescent current during light load conditions. The MAX77659 SIMO PMIC supports autonomous headroom control, which reduces heat dissipation by minimizing the voltage drop while providing enough headroom to regulate the charging current.

The MAX77659 integrates a switch mode buck-boost charger that charges wearables and hearables four times faster. A short, ten-minute charge delivers over four hours of play time compared with traditional solutions that can deliver just one-and-a-half hours of play time post charge.

The MAX77659 is offered in a tiny 30-bump wafer level package (WLP) that measures 2.55mm x 2.37mm. Use of a single inductor and integration of the charger reduces the bill of materials by 60 percent for a total solution size of just 22mm2, small enough for the most compact wearable and hearable applications.

Analog Devices | www.analog.com

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Tiny PMIC Enables 4x Faster Wearable Charging

by Circuit Cellar Staff time to read: 1 min