MAX17040 Datasheet

• Host-Side or Battery-Side Fuel Gauging
  • 1 Cell (MAX17040)
• Precision Voltage Measurement
  • ±12.5mV Accuracy to 5.00V (MAX17040)
• Accurate Relative Capacity (RSOC) Calculated from ModelGauge Algorithm
• No Offset Accumulation on Measurement
• No Full-to-Empty Battery Relearning Necessary
• No Sense Resistor Required
• 2-Wire Interface
• Low Power Consumption
• Tiny, Lead(Pb)-Free, 8-pin, 2mm x 3mm TDFN Package or Tiny 0.4mm Pitch 9-Bump UCSP Package

• Digital Still, Video, and Action Cameras
• Handheld Computers and Terminals
• Health and Fitness Monitors
• Medical Devices
• Smartphones, Tablets
• Wireless Speakers

The MAX17040 are ultra-compact, low-cost, host-side fuel-gauge systems for lithium-ion (Li+) batteries in handheld and portable equipment. The MAX17040 is configured to operate with a single lithium cell.

The MAX17040 use a sophisticated Li+ battery-modeling scheme, called ModelGauge™ to track the battery's relative state-of-charge (SOC) continuously over a widely varying charge/discharge profile. Unlike traditional fuel gauges, the ModelGauge algorithm eliminates the need for battery relearn cycles and an external current-sense resistor. Temperature compensation is possible in the application with minimal interaction between a µC and the device.

The IC can be located on the system side, reducing cost and supply chain constraints on the battery. Measurement and estimated capacity data sets are accessed through an I²C interface. The MAX17040 are available in either a 0.4mm pitch 9-bump UCSP™ or 2mm x 3mm, 8-pin TDFN lead-free package.