MAX17049
PRODUCTION3µA 1-Cell/2-Cell Fuel Gauge with ModelGauge
Maximize Battery Run Time with Industry's Smallest Size, Lowest Power Fuel Gauges that Eliminate a Current-Sense Resistor
- Part Models
- 4
- 1ku List Price
- price unavailable
Overview
- MAX17048: 1 Cell, MAX17049: 2 Cells
- Precision ±7.5mV/Cell Voltage Measurement
- ModelGauge Algorithm
- Provides Accurate State-of-Charge
- Compensates for Temperature/Load Variation
- Does Not Accumulate Errors, Unlike Coulomb Counters
- Eliminates Learning
- Eliminates Current-Sense Resistor
- Ultra-Low Quiescent Current
- 3µA Hibernate, 23µA Active
- Fuel Gauges in Hibernate Mode
- Automatically Enters and Exits Hibernate Mode
- Reports Charge and Discharge Rate
- Battery-Insertion Debounce
- Best of 16 Samples to Estimate Initial SOC
- Programmable Reset for Battery Swap
- 2.28V to 3.48V Range
- Configurable Alert Indicator
- Low SOC
- 1% Change in SOC
- Battery Undervoltage/Overvoltage
- VRESET Alert
- I2C Interface
- 8-Bit OTP ID Register (Contact Factory)
The MAX17048/MAX17049 ICs are tiny, micropower current fuel gauges for lithium-ion (Li+) batteries in handheld and portable equipment. The MAX17048 operates with a single lithium cell and the MAX17049 with two lithium cells in series.
The ICs use the sophisticated Li+ battery-modeling algorithm ModelGauge™ to track the battery relative state-of-charge (SOC) continuously over widely varying charge and discharge conditions. The ModelGauge algorithm eliminates current-sense resistor and battery-learn cycles required in traditional fuel gauges. Temperature compensation is implemented using the system microcontroller.
The ICs automatically detect when the battery enters a low-current state and switches into a low-power 3µA hibernate mode, while still providing accurate fuel gauging. The ICs automatically exit hibernate mode when the system returns to active state.
On battery insertion, the ICs debounce initial voltage measurements to improve the initial SOC estimate, thus allowing them to be located on system side. SOC, voltage, and rate information is accessed using the I2C interface. The ICs are available in a tiny 0.9mm × 1.7mm, 8-bump wafer-level package (WLP), or a 2mm × 2mm, 8-pin TDFN package.
Applications
- Bluetooth Headsets
- Digital Still, Video, and Action Cameras
- Handheld Computers and Terminals
- Health and Fitness Monitors
- Home and Building Automation, Sensors
- Medical Devices
- Smartphones, Tablets
- Smartwatches, Wearables
- Wireless Speakers
Documentation
Data Sheet 1
User Guide 1
Technical Articles 2
Device Drivers 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX17049G+ | Thin Dual Flatpack No Leads | ||
| MAX17049G+T10 | Thin Dual Flatpack No Leads | ||
| MAX17049X+ | Wafer-Level Package 2x4 Bump, Full Array | ||
| MAX17049X+T10 | Wafer-Level Package 2x4 Bump, Full Array |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 20, 2026 - 2571D PIN/ERRATA |
||
| MAX17049G+ | PRODUCTION | |
| MAX17049G+T10 | PRODUCTION | |
|
Jan 7, 2014 - 1363 ASSEMBLY |
||
| MAX17049G+ | PRODUCTION | |
| MAX17049G+T10 | PRODUCTION | |
|
Feb 21, 2025 - 2453N ASSEMBLY |
||
| MAX17049X+ | PRODUCTION | |
| MAX17049X+T10 | PRODUCTION | |
|
Jul 19, 2016 - 1594_AMENDED ASSEMBLY |
||
| MAX17049X+ | PRODUCTION | |
| MAX17049X+T10 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Device Drivers 1
Evaluation Software 0
Can't find the software or driver you need?
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Battery Monitors & Fuel Gauges 5 | ||
| MAX17040 | PRODUCTION | 1-Cell/2-Cell Fuel Gauge with ModelGauge |
| MAX17041 | PRODUCTION | 1-Cell/2-Cell Fuel Gauge with ModelGauge |
| MAX17043 | PRODUCTION | 1-Cell/2-Cell Fuel Gauge with ModelGauge and Low-Battery Alert |
| MAX17044 | PRODUCTION | 1-Cell/2-Cell Fuel Gauge with ModelGauge and Low-Battery Alert |
| MAX17047 | PRODUCTION | 1-Cell Fuel Gauge with ModelGauge m3 |