ABRIDGED DATA SHEET EVALUATION KIT AVAILABLE MAX14676/MAX14676A Wearable Charge Management Solution General Description The MAX14676/MAX14676A are battery-chargemanagement solutions ideal for low-power wearable applications. These devices include a linear batterycharger with a Smart Power SelectorTM, ModelGaugeTM fuel gauge, and several power-optimized peripherals. They feature an ultra-low-power buck regulator with a quiescent current of 900nA (typical) and 74% efficiency with 10A output. The battery charger features Smart Power Selector operation, allowing operation with dead battery. It limits input current based on a register setting. If the charger power source is unable to supply the entire system load, the smart power control circuit will supplement the system load with current from the battery. The MAX14676/MAX14676A embed a Maxim proprietary ModelGauge fuel gauge to provide an accurate estimate of the available capacity for rechargeable lithium batteries. The MAX14676/MAX14676A include a synchronous highefficiency step-down converter. The device features a fixedfrequency PWM mode for tighter regulation, and a burst mode for increased efficiency during light-load operation. The MAX14676/MAX14676A have a boost regulator and three programmable current sinks that can be used to drive a variety of LED configurations. The boost converter is controlled independently from the current sinks, and they can be also used separately. The MAX14676/MAX14676A feature a power switch controller that allows the device to be turned on and off by a pushbutton. This controller also provides a delayed reset signal and voltage sequencing. These devices are available in a 42-bump, 0.5mm pitch, 3.497mm x 3.118mm wafer-level package (WLP). Smart Power Selector and ModelGauge are trademarks of Maxim Integrated Products, Inc. 19-6856; Rev 3; 5/17 Benefits and Features Extend System Use Time Between Battery Charging * 1.8V Low-IQ 200mA Buck Regulator * - 0.9A (typ) Quiescent Current * - Automatic Burst or Forced-PWM Modes * ModelGauge with Accurate State-of-Charge Easy-to-Implement Li+ Battery Charging * Smart Power Selector * 28V Tolerant Input * Thermistor Monitor Minimize Power-Management Footprint though High Integration * 3.2V Low-IQ 100mA LDO * 2.0V Always-On 50A LDO * +5V Safe Output LDO * 6.6V Low-IQ 120A Charge Pump Support a Wide Variety of Display Options * 5V to 17V Output Boost Converter * 3-Channel Adjustable High-Voltage Current Sinks Optimize System Control * Pushbutton to Enable Ultra-Low-Power Mode and Power-On Voltage Sequencing * I2C Control Applications Wearable Electronics GPS Watches Fitness Monitors Portable Medical Devices Ordering Information/Selector Guide appears at end of data sheet. ABRIDGED DATA SHEET MAX14676/MAX14676A Wearable Charge Management Solution Typical Application Circuit VIO +2.0V VIO MAX14676/MAX14676A ALRT ALRT RST CTG KOUT QSTRT FUEL GAUGE POWER SWITCH CELL RST KEY KIN 0.1F AOLDO 0.1F CAP NVP 1 CHGIN 1F Li+ BATTERY CHARGER WITH SMART POWER SELECTOR GND +5V SFOUT THM BAT GND SYS 5V LDO 1F BOUT VIO 1.8V BUCK 1F 1F VSYS +1.8V BLX 2.2H SCL SCL 3.2V LDO SDA SDA INT INT MPC0 MPC0 CONTROL VSYS +12V 6.6V CHARGE PUMP LED0 LED1 LED2 LOUT CPOUT MPC1 MPC1 10F +3.2V +6.6V CPP CPN 10F 15F 1F 27nF VSYS HVLX CURRENT SINKS BOOST HVOUT 3.3H HVCAP +12V 4.7F 4.7F BUZZER GND NOTE 1: OPTIONAL FOR REVERSE VOLTAGE PROTECTION www.maximintegrated.com Maxim Integrated 2 ABRIDGED DATA SHEET MAX14676/MAX14676A Wearable Charge Management Solution Ordering Information/Selector Guide PART BUCK 3.2V LDO STAY ON BIT DEFAULT* BUMP-PACKAGE MAX14676EWO+T Forced On Forced On 0 42 WLP MAX14676AEWO+T Forced On Off (default) 1 42 WLP + Denotes lead(Pb)-free/RoHS compliant package. T = Tape and reel. *See Table 29 for the StayOn bit default settings. Chip Information PROCESS: BiCMOS www.maximintegrated.com Maxim Integrated 49 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Maxim Integrated: MAX14676AEWO+ MAX14676DEWO+ MAX14676EVAL# MAX14676EEVAL# MAX14676EDEMBD# MAX14676DEMBD# MAX14676AEVAL# MAX14676ADEMBD# MAX14676CEVAL# MAX14676BDEMBD# MAX14676CDEMBD# MAX14676DDEMBD# MAX14676DEVAL# MAX14676BEVAL# MAX14676AEWO+T MAX14676EWO+T