SIMO PMIC with 300mA Switching Charger

The MAX77659 provides highly-efficient integrated battery charging and power supply solutions for low-power applications where size and efficiency are critical. The IC features a dual-input SIMO buck-boost regulator that provides one charging rail and three independently programmable power rails from a single inductor to minimize total solution size. A 100mA LDO provides ripple rejection for audio and other noise-sensitive applications. The LDO can also be configured as a load switch to manage power consumption by disconnecting external blocks when not required. A highly-configurable switching charger supports a wide range of Li+ battery capacities and includes battery temperature monitoring for additional safety (JEITA). This device includes two GPIOs and an analog multiplexer that switches several internal voltages 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

* TWS Earbuds * Bluetooth Headphones, Hearables * Smart Wearables, Fitness Bands, and Medical Wearables * Hearing Aids

* Highly Integrated

* 3x Output, Single-Inductor Multiple-Output (SIMO) Buck-Boost Regulator

* Supports Wide Output Voltage Range from 0.5V to 5.5V for all SIMO Channels

* 1x 100mA LDO/LSW * Smart Power Selector™ Li+/Li-Poly Switching Charger * 2x GPIO Resources * Analog MUX Output for Power Monitoring * Factory-Ship Mode (< 200nA IQ) * Watchdog Timer

* Low Power

* 0.3μA Shutdown Current * 5μA Operating Current (3 SIMO Channels + 1 LDO)

* Charger Optimized for Small Battery Size

* Input Operating Voltage from 3.4V to 5.5V

* Programmable Battery Regulation Voltage from 3.6V to 4.6V

* (MAX77659A) Programmable Fast-Charge Current from 7.5mA to 300mA

* (MAX77659S) Programmable Fast-Charge Current from 5.0mA to 200mA

* (MAX77659A) Programmable Termination Current from 0.375mA to 45mA

* (MAX77659S) Programmable Termination Current from 0.250mA to 30mA * Thermal Regulation and JEITA Compliance

* Flexible and Configurable

* I2C-Compatible Interface and GPIO * Factory OTP Options Available

* Small Size

* 6.04mm2 Wafer-Level Package (WLP) * 30-Bump, 0.4mm Pitch, 6x5 Array