MAX77650/MAX77651 PMIC

By Maxim Integrated 118

MAX77650/MAX77651 PMIC

Maxim Integrated's MAX77650AEWV+ and MAX77651AEWV+ are a highly integrated battery charging and power supply solutions. These chips were designed for low power, wearable applications in which size and efficiency are important. Both devices feature a single inductor, multiple output (SIMO) buck-boost regulator that provides three independently programmable power rails from one single inductor. This allows users to minimize the total solution size.

A 150 mA LDO provides ripple rejection for noise sensitive applications including audio. The ICs include battery temperature monitoring, 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. The bidirectional I2C interface allows users to configure and check the status of the device.

SIMO Switching Regulators Extending Battery Life for Hearables and Wearables

DS26 Hearables Get Longer Life with SIMO

Features
  • Highly integrated
    • Smart power selector™ Li+/Li-Poly charger
    • 3-output, SIMO buck-boost regulator
    • 150 mA LDO
    • 3-channel current sink driver
    • Analog MUX output for power monitoring
  • Flexible and configurable
    • I2C compatible interface and GPIO
    • Factory OTP options available
  • Low power
    • 0.3 µA standby current
    • 5.6 µA operating current (3 SIMO channels + LDO)
  • Charger optimized for small battery size
    • Programmable fast-charge current from 7.5 mA to 300 mA
    • Programmable battery regulation voltage from 3.6 V to 4.6 V
    • Programmable termination current from 0.375 mA to 45 mA
    • JEITA battery temperature monitors adjust charge current and battery regulation voltage for safe charging
  • Small size
    • 2.75 mm x 2.15 mm x 0.7 mm WLP package
    • 30-bump, 0.4 mm pitch WLP, 6 x 5 array
    • Small total solution size (19.2 mm2)
Applications
  • Bluetooth headphones/wearables
  • Fitness, health, and activity monitors
  • Internet of Things (IoT)
  • Portable devices

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