MAX77650 Datasheet | Maxim Integrated

Description The MAX77650/MAX77651 provide highly-integrated battery charging and power supply solutions for low-power wearable applications where size and efficiency are critical. Both devices feature a SIMO buck-boost regulator that provides three independently programmable power rails from a single inductor to minimize total solution size. A 150m A LDO provides ripple rejection for audio and other noise-sensitive applications. A highly configurable linear charger supports a wide range of Li+ battery capacities and includes battery temperature monitoring for additional safety (JEITA). The devices include other features such as current sinks for driving LED indicators 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 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 when the devices are on. Numerous factory programmable options allow the device to be tailored for many applications, enabling faster time to market. Simplified Application Circuit VBUS + CHGIN BATT IN_SBB SYS VSYS TBIAS THM IN_LDO SBB0 SBB1 SBB2 1.5µH LXA LXB BST PGND GPIO VIO LDO SYS MAX77650 LED0 LED1 LED2 n EN SDA SCL n RST n IRQ PWR_HLD AMUX - PULLUP RESISTORS NOT DRAWN 2.05V 1.2V 3.3V SYSTEM RESOURCES GPIO 1.85V SDA SCL n RST n IRQ PWR_HLD AMUX VIO/Power - - PROCESSOR - - ADC INPUT Benefits and Features - - Highly Integrated - Smart Power Selector™ Li+/Li-Poly Charger - 3 Output, Single-Inductor Multiple-Output (SIMO) Buck-Boost Regulator - 150m A LDO - 3-Channel Current Sink Driver - Analog MUX Output for Power Monitoring - - Low Power - 0.3μA Shutdown Current - 5.6μA Operating Current (3 SIMO Channels +...