MAX14676A:Wearable Charge Management Solution

Extend Battery Life of Wearable Electronics

The MAX14676/MAX14676A are battery-charge-management solutions ideal for low-power wearable applications. These devices include a linear battery-charger with a Smart Power Selector™, ModelGauge™ 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 10μA 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 high-efficiency step-down converter. The device features a fixed-frequency 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).

关键特性
  • Extend System Use Time Between Battery Charging
    • 1.8V Low-IQ 200mA Buck Regulator
      • 0.9μA (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 50μA LDO
    • +5V Safe Output LDO
    • 6.6V Low-IQ 120μA 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
应用
  • 健身监测器
  • 便携式医疗设备
  • 可穿戴电子产品
数据手册DataSheet
语言下载文件备注
英文MAX14676-MAX14676A.pdfRev 0; 09/2014
关键参数
Part NumberPrimary TopologyMonitor/Control FeaturesDC-DC/Power FeaturesLCD/LED/Flash/CCD FeaturesBattery Charger FeaturesInterface TypeVIN
(V)
VIN
(V)
VOUT
(V)
VOUT
(V)
Max. IOUT
(A)
Max. IOUT
(A)
Oper. Freq.
(kHz)
Package/Pins
minmaxminmax
MAX14676
  • Step-Down
  • Step-Up
  • Reset Output
  • Serial Interface
  • Shutdown
  • Current Limit
  • Fixed Freq./PWM
  • Internal Switch
  • Soft Start
  • Sync. Rectifier
  • AMOLED Bias
  • White LED
  • Battery Charger
  • Charge Timer
  • Input Current Limit
  • Smart Pwr. Selector
  • Thermal Die Regulation
  • Thermistor Input
I2C2.75.55170.20.2
  • 1500
  • 2000
WLP/42
MAX14676AWLP/42
质量和环境数据
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX14676AEWO+生产中WLP,;42引脚;WLP;-40°C至+85°CRoHS/无铅:无铅
MAX14676AEWO+T生产中WLP,;42引脚;WLP;-40°C至+85°CRoHS/无铅:无铅
MAX14676-MAX14676A.pdf MAX14676A
MAX14676A.pdf MAX14676A