Ultra-Low Power PMIC Featuring Single-Inductor, 3-Output Buck-Boost, 2-LDOs, Power-Path Charger for Small Li+, and Ship Mode

The MAX77654 provides highly-integrated battery charging and power supply solutions for low-power applications where size and efficiency are critical. The IC features a SIMO buck-boost regulator that provides three independently programmable power rails from a single inductor to minimize total solution size. Two 100mA LDOs provide ripple rejection for audio and other noise-sensitive applications. The LDOs can also be configured as load switches to manage power consumption by disconnecting external blocks when not required. A highly-configurable linear charger supports a wide range of Li+ battery capacities and includes battery temperature monitoring for additional safety (JEITA).

This device includes three GPIOs and an analog multiplexer that switches several internal voltage and current signals to an external node for monitoring with an external ADC. A bidirectional I2C serial interface allows for configuring and checking the status of the devices. An internal on/off controller provides a controlled startup sequence for the regulators and provides supervisory functionality while they are on. Numerous factory programmable options allow the device to be tailored for many applications, enabling faster time to market.Applications

* Bluetooth Headphones, Hearables * Wireless Speakers * Fitness, Health, and Activity Monitors * Wearables * Safety and Security Monitors * Sensor Nodes * Portable Consumer Devices * Internet of Things (IoT)

* Low Power

* Factory Ship Mode (<200nA IQ)

* 300nA Shutdown Current

* 6μA Typical IQ with all Outputs (3x SIMO and 2x LDOs) Enabled in Low-Power Mode

* Smart Power Selector™ Li+/Li-Poly Charger

* Programmable Charge Current from 7.5mA to 300mA

* Programmable Charge Voltage from 3.6V to 4.6V

* Programmable Termination Current from 0.375mA to 45mA

* JEITA Battery Temperature Monitors for Safe Charging

* Single-Inductor Multiple-Output (SIMO) Regulator

* 3x Buck/Buck-Boost Regulators, 1x Inductor

* 2.5V to 5.5V Input Voltage Range

* 0.8V to 5.5V Output Voltage Range

* 500mA Total Output Current (3.7VIN, 1.8VOUT)

* Up to 91% Efficiency (3.7VIN, 1.8VOUT)

* Low Dropout Regulator (LDO)

* 2x Outputs Configurable as LDO or Load Switch (LSW)

* 1.71V to 5.5V Input Voltage Range in LDO Mode

* 1.3V to 5.5V Input Voltage Range in LSW Mode

* 0.8V to 3.975V Output Voltage Range in LDO Mode

* Up to 100mA Output Current

* Flexible Power Sequencer (FPS)

* 3x GPIO Resources

* Dedicated Enable Pin

* I2C Interface

* Watchdog Timer

* Analog MUX Output for Power Monitoring

* 2.79mm x 2.34mm, 30-Bumps, 0.4mm Pitch Wafer-Level Package (WLP)

* <40mm2 Solution Size