text.skipToContent text.skipToNavigation




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.

Designers of Bluetooth® headphones, activity monitors, smart garments, smartwatches, and other size-constrained devices can now increase battery life and efficiency using the MAX77650/MAX77651 power management ICs (PMICs) from Maxim Integrated.

For space savings and efficiency, Maxim has integrated all these functions into a complete power solution that is only 19.2mm2—less than 1/2 the size of existing solutions.

The MAX77650 and MAX77651 feature single inductor multiple output (SIMO) buck-boost regulators that provide three independently programmable power rails using a single inductor, 150mA 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 analog multiplexer output for safe battery monitoring, making them ideal for tiny, low-power designs.



  • Ultra-low power: 0.3μA standby current, 5.6μA operating current
  • High efficiency: 3-output SIMO channels plus LDO extend Li+ battery life
  • Smallest solution size: multi-channel SIMO regulator significantly reduces component count and board space
  • Available in a tiny 2.75 × 2.15 × 0.7mm wafer level package (WLP)



Maxim Integrated