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