. Click here for production status of specific part numbers. MAX77278 Ultra-Low Power PMIC with 3-Output SIMO, Power Path Charger Optimized for Small Li+, 425mA Current Sink, and 8 GPIOs General Description Benefits and Features The MAX77278 provides a highly-integrated battery Highly Integrated charging and power supply solution for low-power appli- Smart Power Selector Li+/Li-Poly Charger cations where size and efficiency are critical. The device Three Output, SIMO Buck-Boost Regulator 50mA LDO with SIMO Fixed Headroom Control features a single-inductor multiple-output (SIMO) buck- boost regulator that provides three independently pro- Programmable 250mA to 425mA Current Sink Driver grammable power rails from a single inductor to minimize total solution size. A 50mA LDO provides ripple rejection Analog MUX Output for Power Monitoring Eight GPIOs (Configured for One-Button Wake-Up for audio and other noise-sensitive applications. A highly- configurable linear charger supports a wide range of Li+ and Two-Button Shutdown) battery capacities and includes battery temperature moni- Low Power toring for additional safety (JEITA). 0.3A Standby Current The device includes other features such as a program- 16A Operating Current Charger Optimized for Small Battery Size mable current sink that can be used to drive an IR-LED, 8 Programmable Fast-Charge Current from 7.5mA general-purpose input/output (GPIO) control pins, and an to 300mA analog multiplex (AMUX) output that provides access to 2 Programmable Battery Regulation Voltage from useful battery charging signals. A bidirectional I C inter- 3.6V to 4.6V face allows for configuring and checking the status of the Programmable Termination Current from 0.375mA device. An internal on/off controller provides a controlled to 45mA startup sequence for the regulators and provides super- JEITA Battery Temperature Monitors Adjust Charge visory functionality when the device is on. Numerous fac- Current and Battery Regulation Voltage for Safe tory programmable options allow the device to be tailored Charging for many applications, enabling faster time to market. Flexible and Configurable Simplified Application Circuit 2 I C-Compatible Interface Eight GPIOs IN SBB VBUS Factory OTP Options Available SYS CHGIN VSYS BATT + Small Size IN LDO 3.15mm x 2.15mm x 0.7mm GND SBB0 35-Bump, 0.4mm-Pitch, 7x5 Ball Array, WLP TBIAS SBB1 2 Small Total Solution Size (24mm ) THM SYSTEM RESOURCES SBB2 1.5H Applications PGND LXA LXB Remote Controls, Game Pads, Media Center BST Controllers LDO SYS Wearables, Fitness and Health Monitors CS MAX77278 Smart Home Automation Pads, Thermostats, Battery- CS GND VIO VIO/POWER Powered User Interfaces CS EN CS EN nEN Internet of Things (IoT) Gadgets SDA SDA * PROCESSOR SDL SCL * * GPIO0 nRST nRST * nIRQ nIRQ * * Ordering Information appears at end of data sheet. GPIO7 AMUX AMUX ADC INPUT Smart Power Selector is a trademark of Maxim Integrated *PULLUP RESISTORS NOT DRAWN Products, Inc. 19-100167 Rev 3 11/18MAX77278 Ultra-Low Power PMIC with 3-Output SIMO, Power Path Charger Optimized for Small Li+, 425mA Current Sink, and 8 GPIOs TABLE OF CONTENTS General Description ............................................................................ 1 Benefits and Features .......................................................................... 1 Applications .................................................................................. 1 Simplified Application Circuit ..................................................................... 1 Absolute Maximum Ratings ...................................................................... 6 Package Information ........................................................................... 6 35 WLP 0.4mm Pitch . 6 Electrical CharacteristicsGlobal Resources........................................................ 7 Electrical CharacteristicsSmart Power Selector Charger ............................................ 10 Electrical CharacteristicsAdjustable Thermistor Temperature Monitors ................................. 13 Electrical CharacteristicsAnalog Multiplexer and Power Monitor AFEs.................................. 13 Electrical CharacteristicsSIMO Buck-Boost....................................................... 15 Electrical CharacteristicsLDO ................................................................. 17 Electrical CharacteristicsCurrent Sink ........................................................... 19 2 Electrical CharacteristicsI C .................................................................. 20 Typical Operating Characteristics ................................................................ 22 Bump Configuration ........................................................................... 28 Bump Description............................................................................. 28 Detailed Description........................................................................... 30 Support Materials . 30 Top-Level Interconnect Simplified Diagram . 30 Detailed DescriptionGlobal Resources .......................................................... 32 Features and Benefits 32 Voltage Monitors 32 SYS POR Comparator . 32 SYS Undervoltage Lockout Comparator . 32 SYS Overvoltage Lockout Comparator 32 nEN Enable Input . 32 nEN Manual Reset 33 nEN Dual-Functionality: Push-Button vs. Slide-Switch 33 Interrupts (nIRQ) 33 Reset Output (nRST) 34 General-Purpose Input/Output (GPIO) . 34 GPIO Wake-Up 35 GPIO Shutdown 35 On/Off Controller 35 Flexible Power Sequencer (FPS) . 39 Debounced Inputs (nEN, GPI, CHGIN) 43 Maxim Integrated 2 www.maximintegrated.com