SLUSDF8E June   2019  – July 2024

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Description (continued)
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Thermal Information
    6. 6.6 Electrical Characteristics
    7. 6.7 Timing Requirements
    8. 6.8 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Power-On-Reset (POR)
      2. 7.3.2  Device Power Up From Battery Without Input Source
      3. 7.3.3  Power Up From Input Source
        1. 7.3.3.1 Power Up REGN LDO
        2. 7.3.3.2 Poor Source Qualification
        3. 7.3.3.3 Input Source Type Detection (IINDPM Threshold)
          1. 7.3.3.3.1 PSEL Pins Sets Input Current Limit
        4. 7.3.3.4 Input Voltage Limit Threshold Setting (VINDPM Threshold)
        5. 7.3.3.5 Power Up Converter in Buck Mode
        6. 7.3.3.6 HIZ Mode with Adapter Present
      4. 7.3.4  Boost Mode Operation From Battery
      5. 7.3.5  Power Path Management
        1. 7.3.5.1 Narrow VDC Architecture
        2. 7.3.5.2 Dynamic Power Management
        3. 7.3.5.3 Supplement Mode
      6. 7.3.6  Battery Charging Management
        1. 7.3.6.1 Autonomous Charging Cycle
        2. 7.3.6.2 Battery Charging Profile
        3. 7.3.6.3 Charging Termination
        4. 7.3.6.4 Thermistor Qualification
          1. 7.3.6.4.1 JEITA Guideline Compliance During Charging Mode
          2. 7.3.6.4.2 Boost Mode Thermistor Monitor During Battery Discharge Mode
        5. 7.3.6.5 Charging Safety Timer
      7. 7.3.7  Ship Mode and QON Pin
        1. 7.3.7.1 BATFET Disable (Enter Ship Mode)
        2. 7.3.7.2 BATFET Enable (Exit Ship Mode)
        3. 7.3.7.3 BATFET Full System Reset
      8. 7.3.8  Status Outputs (STAT, INT , PMID_GOOD)
        1. 7.3.8.1 Power Good Indicator (PG_STAT Bit)
        2. 7.3.8.2 Charging Status Indicator (STAT)
        3. 7.3.8.3 Interrupt to Host (INT)
        4. 7.3.8.4 PMID Voltage Indicator (PMID_GOOD)
      9. 7.3.9  Protections
        1. 7.3.9.1 Voltage and Current Monitoring in Buck Mode
          1. 7.3.9.1.1 Input Overvoltage Protection (ACOV)
          2. 7.3.9.1.2 System Overvoltage Protection (SYSOVP)
        2. 7.3.9.2 Voltage and Current Monitoring in Boost Mode
          1. 7.3.9.2.1 Boost Mode Overvoltage Protection
          2. 7.3.9.2.2 PMID Overcurrent Protection
        3. 7.3.9.3 Thermal Regulation and Thermal Shutdown
          1. 7.3.9.3.1 Thermal Protection in Buck Mode
          2. 7.3.9.3.2 Thermal Protection in Boost Mode
        4. 7.3.9.4 Battery Protection
          1. 7.3.9.4.1 Battery Overvoltage Protection (BATOVP)
          2. 7.3.9.4.2 Battery Overdischarge Protection
          3. 7.3.9.4.3 System Overcurrent Protection
      10. 7.3.10 Serial Interface
        1. 7.3.10.1 Data Validity
        2. 7.3.10.2 START and STOP Conditions
        3. 7.3.10.3 Byte Format
        4. 7.3.10.4 Acknowledge (ACK) and Not Acknowledge (NACK)
        5. 7.3.10.5 Slave Address and Data Direction Bit
        6. 7.3.10.6 Single Read and Write
        7. 7.3.10.7 Multi-Read and Multi-Write
    4. 7.4 Device Functional Modes
      1. 7.4.1 Host Mode and Default Mode
    5. 7.5 Register Maps
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Inductor Selection
        2. 8.2.2.2 Input Capacitor and Resistor
        3. 8.2.2.3 Output Capacitor
      3. 8.2.3 Application Curves
  10. 9 Power Supply Recommendations
  11. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Support Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  13. 12Revision History
  14. 13Mechanical, Packaging, and Orderable Information

3 Description

The BQ25618/619 integrates charge, boost converter and voltage protection in a single device. It offers the industry's lowest termination current for switching chargers to charge wearable devices by full battery capacity. The BQ25618/619 best-in-class low quiescent current reduces battery leakage down to 6uA in Ship mode, which conserves battery energy to double the shelf life for the device. The BQ25619 is in a 4mm × 4mm QFN package for easy layout. The BQ25618 is in a 2.0mm × 2.4mm WCSP package for space limited design.

Package Information
PART NUMBER PACKAGE(1) PACKAGE SIZE(2) BODY SIZE (NOM)
BQ25618 YFF (DSBGA, 30) 2.20mm × 2.60mm 2.00mm × 2.40mm
BQ25619 RTW (WQFN, 24) 4.00mm × 4.00mm 4.00mm × 4.00mm
(1) For all available packages, see Section 13.
(2) The package size (length × width) is a nominal value and includes pins, where applicable.
BQ25618 BQ25619 Simplified Application Simplified Application