MAX17040G+T

Overview

The MAX17040G+T is a compact, low-cost fuel gauge system designed for lithium-ion batteries in portable equipment. It supports single-cell (1S) operation with a 2.5V to 4.5V operating supply voltage and consumes only 23µA of active current. The device features ModelGauge algorithm-based relative state-of-charge calculation without sense resistors or full-to-empty relearning requirements. It utilizes an I2C interface and is housed in an 8-pin TDFN package measuring 2mm x 3mm, suitable for surface-mount installation.

Feature Summary

• ModelGauge algorithm enables accurate relative capacity calculation without offset accumulation
• Eliminates the need for sense resistors and full-to-empty battery relearning procedures
• Supports both host-side and battery-side fuel gauging configurations

Applications

• Smartphones and tablets
• Health and fitness monitors
• Medical devices
• Digital still, video, and action cameras
• Handheld computers and terminals

Procurement Notes

Verify component authenticity through authorized distribution channels due to limited availability status. Confirm RoHS compliance and lead-free packaging specifications against current datasheet revisions. Ensure I2C interface compatibility with target host microcontrollers prior to integration. Validate thermal performance within the specified -40°C to +85°C operating range for final application design.

Selection Notes

Select this component for applications requiring ultra-compact form factors and minimal bill-of-materials complexity. The absence of sense resistors reduces cost and board space compared to alternative solutions. Ideal for designs where moderate accuracy suffices and absolute state-of-charge calibration is not critical. Consider the 8-pin TDFN package constraints for high-density PCB layouts.

Part Context

Part of the MAX1704x series featuring ModelGauge technology for lithium-ion battery monitoring. Designed as a host-side solution for portable electronics requiring efficient power management. Offers a balance between precision voltage measurement and low power consumption.

Replacement Considerations

MAX17041G+T serves as the dual-cell variant for 2S pack configurations.