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MAX17043, MAX17044

Compact, Low-Cost 1S/2S Fuel Gauges with Low-Battery Alert

Smarten Up Your Dumb Battery!
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Status Explanations for product status codes

Part Number Status
MAX17043 Active: In Production. See Ordering Information for details.
MAX17044 Active: In Production. See Ordering Information for details.


The MAX17043/MAX17044 are ultra-compact, low-cost, host-side fuel-gauge systems for lithium-ion (Li+) batteries in handheld and portable equipment. The MAX17043 is configured to operate with a single lithium cell and the MAX17044 is configured for a dual-cell 2S pack.

The MAX17043/MAX17044 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.

A quick-start mode provides a good initial estimate of the battery's SOC. This feature allows the IC to be located on system side, reducing cost and supply chain constraints on the battery. Measurement and estimated capacity data sets are accessed through an I²C interface. The MAX17043/MAX17044 are available in either a 0.4mm pitch 9-bump UCSP™ or 2mm x 3mm, 8-pin TDFN lead-free package.

Data Sheet

Download this datasheet in PDF formatDownload Rev 6 (PDF, 363.8kB)
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NOTE: This product uses the following:
MAX17044K Custom Datasheet
MAX17043K Custom Datasheet
MAX17044K Custom
MAX17043K Custom

Key Features

  • Host-Side or Battery-Side Fuel Gauging
    • 1 Cell (MAX17043)
    • 2 Cell (MAX17044)
  • Precision Voltage Measurement
    • ±12.5mV Accuracy to 5.00V (MAX17043)
    • ±30mV Accuracy to 10.00V (MAX17044)
  • Accurate Relative Capacity (RSOC) Calculated from ModelGauge Algorithm
  • No Offset Accumulation on Measurement
  • No Full-to-Empty Battery Relearning Necessary
  • No Sense Resistor Required
  • External Alarm/Interrupt for Low-Battery Warning
  • 2-Wire Interface
  • Low Power Consumption
  • Tiny, Lead-Free, 8-Pin, 2mm x 3mm TDFN Package or Tiny 0.4mm Pitch 9-Bump UCSP Package


  • Digital Still Cameras
  • Digital Video Cameras
  • GPS Systems
  • Handheld and Portable Applications
  • MP3 Players
  • Portable DVD Players
  • Smartphones

Key Specifications:

Battery Monitors, Protectors, and Selectors
Part Number Functions Battery Type Interface Parameters Measured Fuel Gauge Algorithm VSUPPLY
Features Oper. Temp.
min max
MAX17043  Fuel Gauge 1 Cell Li-Ion 2-Wire
State of Charge
ModelGauge 2.5 4.5 Low-Battery Alert -40 to +85
MAX17044  2 Cell Li-Ion
See All Battery Monitors, Protectors, and Selectors (34)

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.


MAX17043, MAX17044: Simplified Operating Circuit
Simplified Operating Circuit

Notes and Comments

Fuel Gauge Accurately Reports Battery Capacity from System Side and Maximizes Battery Life

More Information

New Product Press Release   2010-07-12 ]

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Information Index

Document Ref.: 19-4811 Rev 6; 2012-08-06
This page last modified: 2014-03-25