MAX77278/MAX776xx/MAX17270 SIMO PMICs

By Maxim Integrated 171

MAX77278/MAX776xx/MAX17270 SIMO PMICs

Maxim's MAX77278, MAX776xx, and MAX17270 single-inductor, multiple-output (SIMO) power-management ICs (PMICs) provide three independent power rails from a single inductor, eliminating the need to use multiple bulky inductors for wearables, fitness monitors, hearables, trackers, sensors, smart home automation hubs, and Internet of Things (IoT) devices. These low-power SIMO PMICs are ideal for designers of small, battery-powered electronics who want to simultaneously reduce form factor and achieve higher system efficiency.

The MAX77278 provides highly-integrated battery charging and power supply solutions for low-power applications where size and efficiency are critical. The device features a SIMO buck-boost regulator that provides three independently programmable power rails from a single inductor for minimizing the total solution size.

The MAX77640/MAX77641 are a low-quiescent current (IQ) power solution for applications where size and efficiency are critical. The device integrates a 3-output SIMO buck-boost regulator, a 150 mA LDO, and a 3-channel current-sink driver.

The MAX77680/MAX77681 are 3-channel SIMO buck-boost regulators that regulate three independent rails using only 3 µA of IQ. The SIMO improves battery-life by replacing inefficient LDOs while being competitive in efficiency to traditional single-output bucks.

The MAX17270 is a 3-output switching regulator designed for applications requiring efficient regulation of multiple supplies in a very small space. The parts use a buck-boost architecture that regulates three outputs using a single, small 2.2 μH inductor at efficiencies up to 85%.

Features
  • 3-output/2-output SIMO buck-boost regulator
  • 2.7 V to 5.5 V input voltage range
  • Low-power and long battery life
    • 1.3 μA operating current (3 SIMO channels)
    • 330 nA shutdown current
    • 85% efficiency at 3.3 V output
  • Flexible and configurable
    • I2C compatible interface (MAX17271/MAX17273)
    • Programmable output voltage: 0.8 V to 5.175 V
    • Programmable peak current limit
  • Robust
    • Soft start
    • 1.77 mm x 1.77 mm x 0.50 mm 0.4 mm-pitch WLP package
    • 3 mm x 3 mm x 0.75 mm TQFN package
    • Small total solution size
  • Small size
    • 1.77 mm x 1.77 mm x 0.50 mm 0.4 mm-pitch WLP package
    • 3 mm x 3 mm x 0.75 mm TQFN package
    • Small total solution size
Applications
  • Iot devices
  • Remote controls
  • Wearables
  • Action cameras, wearable/body cameras
  • Hearables: Bluetooth® headphones and earbuds
  • IoT devices
  • Wearables: fitness, health, and activity moniors

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