EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX77650/MAX77651 Ultra-Low Power PMIC with 3-Output SIMO and Power Path Charger for Small Li+ General Description Benefits and Features The MAX77650/MAX77651 provide highly-integrated bat- Highly Integrated tery charging and power supply solutions for low-power Smart Power Selector Li+/Li-Poly Charger wearable applications where size and efficiency are 3 Output, Single-Inductor Multiple-Output (SIMO) Buck-Boost Regulator critical. Both devices feature a SIMO buck-boost regulator that provides three independently programmable power 150mA LDO 3-Channel Current Sink Driver rails from a single inductor to minimize total solution size. A 150mA LDO provides ripple rejection for audio Analog MUX Output for Power Monitoring and other noise-sensitive applications. A highly configu- Low Power rable linear charger supports a wide range of Li+ battery 0.3A Shutdown Current capacities and includes battery temperature monitoring 5.6A Operating Current (3 SIMO Channels + for additional safety (JEITA). LDO) The devices include other features such as current sinks Charger Optimized for Small Battery Size for driving LED indicators and an analog multiplexer that Programmable Fast-Charge Current from 7.5mA to switches several internal voltage and current signals to an 300mA external node for monitoring with an external ADC. A bidi- Programmable Battery Regulation Voltage from 2 rectional I C interface allows for configuring and check- 3.6V to 4.6V ing the status of the devices. An internal on/off controller Programmable Termination Current from 0.375mA provides a controlled startup sequence for the regulators to 45mA and provides supervisory functionality when the devices JEITA Battery Temperature Monitors Adjust Charge are on. Numerous factory programmable options allow Current and Battery Regulation Voltage for Safe the device to be tailored for many applications, enabling Charging faster time to market. Flexible and Configurable 2 I C Compatible Interface and GPIO Simplified Application Circuit Factory OTP Options Available V IN SBB BUS Small Size CHGIN SYS VSYS 2.75mm x 2.15mm x 0.7mm WLP Package BATT + 30-Bump, 0.4mm-Pitch WLP, 6x5 Array 2 Small Total Solution Size (19.2mm ) GND IN LDO SBB0 2.05V Applications TBIAS SBB1 1.2V THM SYSTEM Bluetooth Headphones/Hearables SBB2 3.3V RESOURCES Fitness, Health, and Activity Monitors Portable Devices PGND 1.5H Internet of Things (IoT) GPIO LXA GPIO LXB VIO BST LDO 1.85V Ordering Information appears at end of data sheet. MAX77650 SYS Smart Power Selector is a trademark of Maxim Integrated LED0 VIO/Power Products, Inc. LED1 * SDA SDA LED2 * PROCESSOR SCL SCL * nRST nRST * nEN nIRQ nIRQ PWR HLD PWR HLD AMUX AMUX ADC INPUT *PULLUP RESISTORS NOT DRAWN 19-8550 Rev 7 9/18MAX77650/MAX77651 Ultra-Low Power PMIC with 3-Output SIMO and Power Path Charger for Small Li+ TABLE OF CONTENTS General Description ............................................................................ 1 Benefits and Features .......................................................................... 1 Applications .................................................................................. 1 Simplified System Diagram ...................................................................... 1 Absolute Maximum Ratings ...................................................................... 7 Package Information ........................................................................... 7 Electrical CharacteristicsTop Level .............................................................. 9 Electrical CharacteristicsGlobal Resources....................................................... 10 Electrical CharacteristicsSmart Power Selector Charger ............................................ 12 Electrical CharacteristicsAdjustable Thermistor Temperature Monitors ................................. 16 Electrical CharacteristicsAnalog Multiplexer and Power Monitor AFEs.................................. 16 Electrical CharacteristicsSIMO Buck-Boost....................................................... 17 Electrical CharacteristicsLDO ................................................................. 19 Electrical CharacteristicsCurrent Sinks .......................................................... 21 2 Electrical CharacteristicsI C Serial Interface...................................................... 22 Typical Operating Characteristics ................................................................ 25 Pin Configuration ............................................................................. 34 Pin Description ............................................................................... 34 Detailed Description........................................................................... 36 Support Materials . 36 Top-Level Interconnect Simplified Diagram . 36 Global Resources............................................................................. 38 Features and Benefits 38 Voltage Monitors 38 SYS POR Comparator . 38 SYS Undervoltage Lockout Comparator . 38 SYS Overvoltage Lockout Comparator 38 nEN Enable Input . 38 nEN Manual Reset 38 nEN Dual-functionality: Push-Button vs. Slide-Switch 39 Interrupts (nIRQ) 39 Reset Output (nRST) 39 Power Hold Input (PWR HLD) . 39 General-Purpose Input Output (GPIO) . 40 On/Off Controller 42 Flexible Power Sequencer 46 Debounced Inputs (nEN, GPI, CHGIN) 49 Smart Power Selector Charger .................................................................. 50 Maxim Integrated 2 www.maximintegrated.com