MAX14676, MAX14676A

Wearable Charge Management Solution

Extend Battery Life of Wearable Electronics


Please check latest availability status for a specific part variant.

Description

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).

Key Features

  • 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

Applications/Uses

  • Fitness Monitors
  • GPS Watches
  • Portable Medical Devices
  • Wearable Electronics

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
Product Reliability Reports: MAX14676A.pdf  MAX14676.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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