MAXIM MAX77654BENV+T

The MAX77654 provides highly-integrated battery charg­ ing 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 indepen­ dently programmable power rails from a single inductor to minimize total solution size. Two 100mA LDOs provide rip­ ple rejection for audio and other noise-sensitive applica­ tions. The LDOs can also be configured as load switch­ es to manage power consumption by disconnecting exter­ nal 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 multi­ plexer 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 config­ uring 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 al­ low the device to be tailored for many applications, en­ abling faster time to market.

• Factory Ship Mode (< 200 nA at quiescent current)
• 300 nA Shutdown Current
• 6 μA Typical quiescent current with all Outputs (3x SIMO and 2x LDOs) Enabled in Low-Power Mode
• Smart Power Selector™ Li+/Li-Poly Charger
• Programmable Charge Current from 7.5 mA to 300 mA
• Programmable Charge Voltage from 3.6 V to 4.6 V
• Programmable Termination Current from 0.375 mA to 45 mA
• JEITA Battery Temperature Monitors for Safe Charging
• Single-Inductor Multiple-Output (SIMO) Regulator
• 3x Buck/Buck-Boost Regulators, 1x Inductor
• 2.5 V to 5.5 V Input Voltage Range
• 0.8 V to 5.5 V Output Voltage Range
• 500 mA Total Output Current (3.7 V input, 1.8 V output)
• Up to 91% Efficiency (3.7 V input, 1.8 V output)
• Low Dropout Regulator (LDO)
• 2x Outputs Configurable as LDO or Load Switch (LSW)
• 1.71 V to 5.5 V Input Voltage Range in LDO Mode
• 1.3 V to 5.5 V Input Voltage Range in LSW Mode
• 0.8 V to 3.975 V Output Voltage Range in LDO Mode
• Up to 100 mA Output Current
• Flexible Power Sequencer (FPS)
• 3x GPIO Resources
• Dedicated Enable Pin
• I²C Interface
• Watchdog Timer
• Analog MUX Output for Power Monitoring
• 2.79 mm x 2.34 mm, 30-Bumps, 0.4 mm Pitch WaferLevel Package (WLP)
• < 40 mm² Solution Size

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