Two power management integrated circuits (PMICs) from Maxim Integrated deliver low standby power to hearing wearable devices (hearables). They also, claims the company, offer high efficiency at less than half the size of alternatives currently available.

The MAX77650 and MAX77651 PMICs have a single inductor multi-output regulator and charger and are optimised for small Lithium-Ion (Li-Ion) batteries used in Bluetooth headphones, activity monitors, smart garments, smartwatches, and other size-constrained devices.

Size is critical for hearables and wearables, explains Maxim Integrated, as they continue moving to smaller form factors. Most PMICs for these small, Li-Ion battery-operated devices require additional components, such as boost, buck, and low dropout (LDO) regulators, a charger and current regulators for light emitting diode (LED) indicators. For space-savings and efficiency, Maxim has integrated these functions into a device that is only 19.2mm². This is less than half the size of existing component combinations, claims Maxim.

The MAX77650 and MAX77651 have single inductor multiple output (SIMO) buck-boost regulators that provide three independently programmable power rails from a single inductor, 150mA LDO, and three current sink drivers to reduce overall component count and maximise available board space.

For design flexibility, the MAX77650 operates up to 3.3V and the MAX77651 operates up to 5.0V. Both include an analogue multiplexer (MUX) output for safe battery monitoring, suitable for low-power designs.

The MAX77650 and MAX77651 have been optimised for small battery size, and also have factory programmable options that allow customers to tailor them to specific requirements and to get to market faster, claims Maxim.

The MAX77650 and MAX77651 are available from stock. The MAX77650EVKIT# and MAX77651EVKIT# are also available from stock.

Maxim Integrated develops analogue and mixed-signal products and technologies to make systems smaller and smarter, with enhanced security and increased energy efficiency. Its products are used by automotive, industrial, healthcare, mobile consumer, and cloud data centre customers.

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