MAX17049

3µA 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

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Overview

Features and Benefits
Product Details

Features and Benefits

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)

Product Details

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

Product Categories

Power Management
- Battery Fuel Gauge and Coulomb Counter

Comparable Parts Click to see all in Parametric Search

Product Lifecycle Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (4)

MAX17049XEVKIT

Evaluation Kits for the MAX17048X and MAX17049X

MAX17049EVKIT

Evaluation Kits for the MAX17048 and MAX17049

MAX17048XEVKIT

Evaluation Kits for the MAX17048X and MAX17049X

MAX17048EVKIT

Evaluation Kits for the MAX17048 and MAX17049

MAX17049XEVKIT

View Detailed Evaluation Kit Information

The MAX17048X/MAX17049X evaluation kits (EV kits) include the MAX17048X/MAX17049X EV kit and the Maxim DS91230+ command module. Windows XP®-, Windows Vista®-, and Windows® 7-compatible software is also available for use with the evaluation kit and can be downloaded from www.maximintegrated.com/evkitsoftware.

The EV kits are fully assembled and tested surface-mount PCBs that evaluate the MAX17048X/MAX17049X host or battery-side fuel gauge for 1-cell/2-cell lithium-ion (Li+) batteries in handheld and portable equipment. The EV kits can be powered from a single battery (MAX17048X) and configured to evaluate a single lithium cell (MAX17048X) or from two lithium cells in series (MAX17049X).

Applications

Digital Still and Video Cameras
e-Readers
Portable Game Players
Portable Medical Equipment
Smartphones/PDAs
Tablets and Handheld Computers
Wireless Handsets

Features & Benefits

Battery Input Voltage Range
- MAX17048X: +2.5V to +4.5V
- MAX17049X: +2.5V to +12V
Powered from a Single Battery (MAX17048X)
Evaluates 1-Cell (MAX17048X) or 2-Cell (MAX17049X) Batteries
Precision ±7.5mV Voltage Measurement per Cell
Current Sense Not Required
On-Board LDO for 2-Cell Evaluation (MAX17049X)
Tiny 0.9mm x 1.7mm, 8-Bump Wafer-Level Package (WLP)
Windows XP-, Windows Vista-, and Windows 7-Compatible Software
Proven PCB Layout
Fully Assembled and Tested

MAX17049EVKIT

View Detailed Evaluation Kit Information

The MAX17048/MAX17049 evaluation kits (EV kits) consist of the MAX17048/MAX17049 evaluation kit (EV kit) and the Maxim DS91230+ command module. A Windows XP®-, Windows Vista®-, and Windows® 7-compatible software is also available for use with the evaluation kits and can be downloaded from www.maximintegrated.com/evkitsoftware.

The EV kits are fully assembled and tested surface-mount PCBs that evaluate the MAX17048/MAX17049 host or battery-side fuel gauge for 1-cell/2-cell lithium-ion (LI+) batteries in handheld and portable equipment. The EV kits can be powered from a single battery (MAX17048) and can be configured to evaluate a single lithium cell (MAX17048) or two lithium cells in series (MAX17049).

Applications

Digital Still and Video Cameras
e-Readers
Portable Game Players
Portable Medical Equipment
Smartphones/PDAs
Tablets and Handheld Computers
Wireless Handsets

Features & Benefits

Battery Input Voltage Range
- +2.5V to +4.5V (MAX17048)
- +2.5V to +12V (MAX17049)
Powered from a Single Battery (MAX17048)
Evaluates 1-Cell (MAX17048) or 2-Cell (MAX17049) Batteries
Precision ±7.5mV Voltage Measurement Per Cell
Current Sense Not Required
On-Board LDO for 2-Cell Evaluation (MAX17049)
Windows XP-, Windows Vista-, and Windows 7-Compatible Software
Proven PCB Layout
Fully Assembled and Tested

MAX17048XEVKIT

View Detailed Evaluation Kit Information

Applications

Digital Still and Video Cameras
e-Readers
Portable Game Players
Portable Medical Equipment
Smartphones/PDAs
Tablets and Handheld Computers
Wireless Handsets

Features & Benefits

Battery Input Voltage Range
- MAX17048X: +2.5V to +4.5V
- MAX17049X: +2.5V to +12V
Powered from a Single Battery (MAX17048X)
Evaluates 1-Cell (MAX17048X) or 2-Cell (MAX17049X) Batteries
Precision ±7.5mV Voltage Measurement per Cell
Current Sense Not Required
On-Board LDO for 2-Cell Evaluation (MAX17049X)
Tiny 0.9mm x 1.7mm, 8-Bump Wafer-Level Package (WLP)
Windows XP-, Windows Vista-, and Windows 7-Compatible Software
Proven PCB Layout
Fully Assembled and Tested

MAX17048EVKIT

View Detailed Evaluation Kit Information

Applications

Digital Still and Video Cameras
e-Readers
Portable Game Players
Portable Medical Equipment
Smartphones/PDAs
Tablets and Handheld Computers
Wireless Handsets

Features & Benefits

Battery Input Voltage Range
- +2.5V to +4.5V (MAX17048)
- +2.5V to +12V (MAX17049)
Powered from a Single Battery (MAX17048)
Evaluates 1-Cell (MAX17048) or 2-Cell (MAX17049) Batteries
Precision ±7.5mV Voltage Measurement Per Cell
Current Sense Not Required
On-Board LDO for 2-Cell Evaluation (MAX17049)
Windows XP-, Windows Vista-, and Windows 7-Compatible Software
Proven PCB Layout
Fully Assembled and Tested

Documentation & Resources

Data Sheets

MAX17048-MAX17049: 3µA 1-Cell/2-Cell Fuel Gauge with ModelGauge Data Sheet (Rev. 7)
12/15/2016

PDF

1M

Reliability Data

MAX17049 Reliability Data
1/12/2023

PDF

124K

Technical Articles

Battery Gauge | Maxim Integrated
7/5/2012

Tools & Simulations

Software Development

MAX17048K-MAX17049K Evaluation Software, 2.2.0

ZIP

Product Recommendations

MAX17049 Companion Parts

Recommended Related Parts

MAX17040, MAX17041, MAX17043, MAX17044, MAX17047.

Design Resources

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Evaluation Boards

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Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.