Compact PMICs Keep Standby Power Low And Efficiency High

Heralded as a godsend for designers of Bluetooth headphones, activity monitors, smart garments, smartwatches, and other size-constrained devices, the MAX77650 and MAX77651 power management ICs (PMICs) promise to increase battery life and efficiency. Most PMICs for 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. The MAX77650 and MAX77651 integrate all these functions into a package measuring 19.2 mm-squared—less than 1/2 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, 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 (MUX) output for safe battery monitoring, making them ideal for low-power designs. Features include:

  • Standby Power: 0.3µA; 5.6µA operating current
  • Efficiency: 3-output SIMO channels plus LDO extend Li+ battery life
  • Smallest Solution Size: Multi-channel SIMO regulator reduces component count


Availability and Pricing

  • MAX77650 / MAX77651 are available from stock and priced at $1.99 each/1,000.
  • MAX77650EVKIT# and MAX77651EVKIT# are available from stock and priced at $193.63 each.


More information is readily available for the MAX77650 and MAX77651 as well as a video demonstration.

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