MAX17262

Part: MAX17262 — Analog Devices, Inc. (formerly Maxim Integrated Products, Inc.)

Type: Ultra-low power fuel-gauge IC

Description: An ultra-low power fuel-gauge IC for single-cell battery packs, implementing the ModelGauge m5 EZ algorithm with internal current sensing options (7mΩ or 30mΩ), supporting 30mAhr to 6Ahr battery capacities, and featuring a 5.2μA operating current.

Operating Conditions:

• Supply voltage: 2.3V to 4.9V
• Operating temperature: -40°C to +85°C
• SCL Clock Frequency: 0 to 400 kHz

Absolute Maximum Ratings:

• Max supply voltage (BATT to GND): +6V
• Max junction temperature: +150°C
• Max storage temperature: +125°C
• Max continuous current (MAX17262R, 100% utilization): 1.7A
• Max continuous current (MAX17262H, 100% utilization): 0.7A

Key Specs:

• Hibernate Supply Current: 5.2 μA (typ, T A ≤ +50°C)
• Active Supply Current: 16 μA (typ, T A ≤ +50°C)
• BATT Measurement Error: ±7.5 mV (T A = +25°C)
• Internal Sense Resistance (MAX17262R): 7 mΩ (typ, T A = +25°C)
• Internal Sense Resistance (MAX17262H): 30 mΩ (typ, T A = +25°C)
• Current Measurement Offset Error: ±1 mA (typ, zero current, long term average)
• Internal Temperature Measurement Error: ±1 °C (-40°C ≤ T A ≤ +85°C)
• SCL Clock Frequency: 400 kHz (max)

Features:

• ModelGauge m5 EZ algorithm, no characterization required
• Robust against battery variation and eliminates error near empty voltage
• Eliminates coulomb-counter drift and compensates for age, current, temperature
• Integrated internal current sensing options (7mΩ and 30mΩ typ)
• Supports Li+ and variants including LiFePO4
• Thermistor or ±1°C internal temperature sensing
• Dynamic power estimates power capability during discharge
• Time-to-empty and time-to-full estimation
• Alert indicator for voltage, SOC, temperature, current, and 1% SOC change
• 2-wire I2C interface

Applications:

• Wearables and Smartwatches
• Bluetooth Headset Cases
• Health and Fitness Monitors
• Medical Devices
• Handheld Computers and Terminals
• Home and Building Automation, Sensors
• Toys

Package:

• WLP (Wafer-Level Package) 1.5mm x 1.5mm, 9-pin (0.4mm pitch)

• ModelGauge m5 EZ
• No Characterization Required for EZ Performance
• Robust Against Battery Variation
• Eliminates Error Near Empty Voltage
• Eliminates Coulomb-Counter Drift
• Compensates for Age, Current, Temperature
• Does Not Require Empty, Full, or Idle States
• Low 5.2μA Operating Current
• Integrated Internal Current Sensing Options · 7mΩ and 30mΩ (typ)
• Supports Li+ and Variants Including LiFePO 4
• Thermistor or ±1°C Internal Temperature
• Dynamic Power Estimates Power Capability During Discharge
• Time-to-Empty and Time-to-Full Estimation
• Constant Power or Constant Current
• Predicts Remaining Capacity Under Theoretical Load
• No Calibration Required
• Alert Indicator for Voltage, SOC, Temperature, Current, and 1% SOC Change

• Wearables and Smartwatches
• Bluetooth Headset Cases
• Health and Fitness Monitors
• Medical Devices
• Handheld Computers and Terminals
• Home and Building Automation, Sensors
• Toys

ModelGauge is a trademark of Maxim Integrated Products, Inc.

Ordering Information appears at end of data sheet.

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(V BATT = 2.3V to 4.9V, T A = -40°C to +85°C, typical value for T A is +25°C. Limits are 100% tested at T A = +25°C. The operating temperature range and relevant supply voltage range are guaranteed by design and characterization. Specifications marked "GBD" are guaranteed by design and not production tested.)

Current Limit of Sense Resistor (Continuous current at 100% utilization of MAX17262R (Note 1)) .......................................1.7A Current Limit of Sense Resistor (Continuous current at 10% utilization of MAX17262R (Note 1)) .......................................2.4A Current Limit of Sense Resistor (Peak pulsed current of MAX17262R, 250ms maximum pulse width, 10% maximum duty cycle, 1% utilization (Note 1)) ................................................3.1A Current Limit of Sense Resistor (Continuous current at 100% utilization of MAX17262H (Note 1)) .......................................0.7A Current Limit of Sense Resistor (Continuous current at 10% utilization of MAX17262H (Note 1)) .......................................0.9A Current Limit of Sense Resistor (Peak pulsed current of MAX17262H, 250ms maximum pulse width, 10% maximum duty cycle, 1% utilization (Note 1)) ..............................................1.28A

Note 1: Guaranteed by design and not production tested. Total available utilization is 100,000 hours. Utilization is proportionately cumulative. See the Current Measurement section for a detailed explanation of the current limit under different utilization patterns.

Stresses beyond those listed under 'Absolute Maximum Ratings' may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.