SLUSEB5B December   2022  – September 2025 BQ27427

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  Recommended Operating Conditions
    4. 5.4  Thermal Information
    5. 5.5  Supply Current
    6. 5.6  Digital Input and Output DC Characteristics
    7. 5.7  LDO Regulator, Wake-up, and Auto-Shutdown DC Characteristics
    8. 5.8  LDO Regulator, Wake-up, and Auto-Shutdown AC Characteristics
    9. 5.9  ADC (Temperature and Cell Measurement) Characteristics
    10. 5.10 Integrating ADC (Coulomb Counter) Characteristics
    11. 5.11 Integrated Sense Resistor Characteristics, –40°C to 85°C
    12. 5.12 I2C-Compatible Interface Communication Timing Characteristics
    13. 5.13 SHUTDOWN and WAKE-UP Timing
    14. 5.14 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Communications
        1. 6.3.1.1 I2C Interface
        2. 6.3.1.2 I2C Time Out
        3. 6.3.1.3 I2C Command Waiting Time
        4. 6.3.1.4 I2C Clock Stretching
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Applications
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 BAT Voltage Sense Input
        2. 7.2.2.2 Integrated LDO Capacitor
      3. 7.2.3 External Thermistor Support
      4. 7.2.4 Application Curves
    3. 7.3 Power Supply Recommendation
      1. 7.3.1 Power Supply Decoupling
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Third-Party Products Disclaimer
      2. 8.1.2 Related Documentation
    2. 8.2 Trademarks
    3. 8.3 Electrostatic Discharge Caution
    4. 8.4 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.3.1.4 I2C Clock Stretching

A clock stretch can occur during all modes of fuel gauge operation. In SLEEP mode, a short ≤ 100µs clock stretch occurs on all I2C traffic as the device must wake-up to process the packet. In the other modes (INITIALIZATION, NORMAL), a ≤ 4ms clock stretching period can occur within packets addressed for the fuel gauge as the I2C interface performs normal data-flow control.