MAX17048G
General Description
Manufacturer
Analog Devices
Overview
Part: MAX17048/MAX17049 from Maxim Integrated Products, Inc.
Type: Micropower Current Fuel Gauge for Lithium-ion (Li+) Batteries
Key Specs:
- Voltage Measurement Error: ±7.5mV/Cell
- Hibernate Quiescent Current: 3μA
- Active Quiescent Current: 23μA
- Supply Voltage (VDD): 2.5V to 4.5V
- Operating Temperature Range: -40°C to +85°C
- I2C Clock Frequency: 400 kHz (Max)
- Voltage-Measurement Resolution: 1.25 mV/cell
- MAX17048 Voltage-Measurement Range: 2.5V to 5V
- MAX17049 Voltage-Measurement Range: 5V to 10V
Features:
- MAX17048: 1 Cell operation
- MAX17049: 2 Cells operation
- ModelGauge Algorithm provides accurate State-of-Charge
- ModelGauge Algorithm compensates for temperature/load variation
- ModelGauge Algorithm does not accumulate errors, unlike coulomb counters
- ModelGauge Algorithm eliminates learning
- ModelGauge Algorithm 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
Applications:
- Smartphones, Tablets
- Smartwatches, Wearables
- Bluetooth Headsets
- Health and Fitness Monitors
- Digital Still, Video, and Action Cameras
- Medical Devices
- Handheld Computers and Terminals
- Wireless Speakers
- Home and Building Automation, Sensors
Package:
- WLP: 0.9mm x 1.7mm, 8-bump
- TDFN: 2mm x 2mm, 8-pin
Features
- 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)
Applications
- Smartphones, Tablets
- Smartwatches, Wearables
- Bluetooth Headsets
- Health and Fitness Monitors
- Digital Still, Video, and Action Cameras
- Medical Devices
- Handheld Computers and Terminals
- Wireless Speakers
- Home and Building Automation, Sensors
Ordering Information appears at end of data sheet.
ModelGauge is a trademark of Maxim Integrated Products, Inc.
Electrical Characteristics
(VDD = 2.5V to 4.5V, TA= -20°C to +70°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
| PARAMETER | SYMBOL | CONDITIONS | MIN | TYP | MAX | UNITS |
|---|---|---|---|---|---|---|
| Supply Voltage | VDD | (Note 2) | 2.5 | 4.5 | V | |
| Fuel-Gauge SOC Reset | Configuration range, in 40mV steps | 2.28 | 3.48 | V | ||
| (VRESET Register) | VRST | Trimmed at 3V | 2.85 | 3.0 | 3.15 | V |
| Data I/O Pins | SCL, SDA, ALRT | (Note 2) | -0.3 | +5.5 | V | |
| Sleep mode, TA ≤ +50°C | 0.5 | 2 | ||||
| IDD0 | Hibernate mode, reset comparator disabled (VRESET.Dis = 1) | 3 5 4 | ||||
| Supply Current | Hibernate mode, reset comparator enabled (VRESET.Dis = 0) | μA | ||||
| IDD1 | Active mode | 23 | 40 | |||
| Time Base Accuracy | tERR | Active, hibernate modes (Note 3) | -3.5 | ±1 | +3.5 | % |
| Active mode | 250 | ms | ||||
| ADC Sample Period | Hibernate mode | 45 | s | |||
| VCELL = 3.6V, TA = +25°C (Note 4) | -7.5 | +7.5 | ||||
| Voltage Error | VERR | -20 | +20 | mV/cell | ||
| Voltage-Measurement Resolution | 1.25 | mV/cell | ||||
| MAX17048: VDD pin | 2.5 | 5 | ||||
| Voltage-Measurement Range | MAX17049: CELL pin | 5 | 10 | V | ||
| SDA, SCL, QSTRT Input Logic-High | VIH | 1.4 | V | |||
| SDA, SCL, QSTRT Input Logic-Low | VIL | 0.5 | V | |||
| SDA, ALRT Output Logic-Low | VOL | IOL = 4mA | 0.4 | V | ||
| SDA, SCL Bus Low-Detection Current | IPD | VSDA = VSCL = 0.4V (Note 5) | 0.2 | 0.4 | μA | |
| Bus Low-Detection Timeout | tSLEEP | (Note 6) | 1.75 | 2.5 | s |
Absolute Maximum Ratings
| CELL to GND0.3V to +12V | Storage Temperature Range55°C to +125°C |
|---|---|
| All Other Pins to GND0.3V to +6V | Lead Temperature (TDFN only) (soldering, 10s)+300°C |
| Continuous Sink Current, SDA, ALRT20mA | Soldering Temperature (reflow)+260°C |
| Operating Temperature Range40°C to +85°C |
Related Variants
The following components are covered by the same datasheet.
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