Tiny PMICs provide “hearables” with lowest standby power, high efficiency

Tiny PMICs provide “hearables” with lowest standby power, high efficiency

New Products |
By Graham Prophet

Size is critical for hearables and wearables as they continue moving to smaller form factors. Most PMICs for these small, lithium-ion battery-operated devices require additional components, such as boost, buck, and low dropout (LDO) regulators; a charger; and current regulators for LED indicators. For space-savings and efficiency, Maxim has integrated all these functions into a complete power solution that is only 19.2 mm-squared – less than half the size of existing component combinations.

The MAX77650 and MAX77651 feature single inductor multiple output (SIMO) buck-boost regulators that provide three independently programmable power rails from a single inductor, 150 mA LDO, and three current-sink drivers to reduce overall component count and maximize available board space. For design flexibility, the MAX77650 operates up to 3.3V and the MAX77651 operates up to 5V – both include an analogue multiplexer (MUX) output for safe battery monitoring, suiting them for low-power designs.


They offer standby current of 0.3µA; with 5.6µA operating current; the 3-output SIMO channels plus LDO extend Li+ battery life; and the multi-channel SIMO regulator reduces component count and overall size.


MAX77650 / MAX77651 are priced at $1.99 (1,000). Evaluation kits, MAX77650EVKIT# and MAX77651EVKIT# are priced at $193.63 each.


MAX77650 information:

MAX77651 information:

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