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BQ25640

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I2C controlled 1-cell 5-A buck battery charger with 18-V max input, Type-C detection and OTG output

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Data sheet

BQ25640

ACTIVE
Data sheet Order now

Product details

Rating Catalog Number of series cells 1 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Charge current (max) (A) 5 Features BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, IINDPM (Input current limit), Input OVP, Integrated ADC, Integrated LDO, Moisture detection, Power Path, USB C/PD compatible, USB OTG integrated, USB Type-C detection, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 3.9 Vin (max) (V) 18 Absolute max Vin (max) (V) 26 Control topology Switch-Mode Buck Battery charge voltage (min) (V) 3.5 Battery charge voltage (max) (V) 4.8 Control interface I2C Operating temperature range (°C) -40 to 85
Rating Catalog Number of series cells 1 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Charge current (max) (A) 5 Features BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, IINDPM (Input current limit), Input OVP, Integrated ADC, Integrated LDO, Moisture detection, Power Path, USB C/PD compatible, USB OTG integrated, USB Type-C detection, VINDPM (Input voltage threshold to maximize adaptor power) Vin (min) (V) 3.9 Vin (max) (V) 18 Absolute max Vin (max) (V) 26 Control topology Switch-Mode Buck Battery charge voltage (min) (V) 3.5 Battery charge voltage (max) (V) 4.8 Control interface I2C Operating temperature range (°C) -40 to 85
WQFN-FCRLF (VDL) 23 8.75 mm² 3.5 x 2.5
  • High-efficiency 5A, 1.5MHz, synchronous switch mode buck charger for single cell battery
    • >90% efficiency down to 10mA output current from 5V input
    • Charge current up to 5A in 20mA steps
    • Charge termination from 30 to 1000mA in 10mA steps
    • Highly configurable JEITA profile for safe charging over temperature
  • Fully Integrated CC Controller with Dual Role Power (DRP), Try.SNK and Try.SRC
  • BATFET control to support shutdown, ship mode and full system reset
    • 1.5µA quiescent current in battery only mode
    • 0.15µA battery leakage current in ship mode
    • 0.1µA battery leakage current in shutdown mode
  • Supports USB On-The-Go (OTG) and SRC mode
    • Reverse mode with 3.84V to 9.6V output
    • Programmable current limit up to 3.2A
  • Supports a wide range of input sources
    • 3.9V to 18V input operating voltage range with 26V absolute max input voltage
    • Supports USB Type-C inputs, USB BC1.2, HVDCP, and Non-Standard Adapters
    • Supports IINDPM Range from 10mA to 3.2A
    • API (Alternate Power from Input) mode for low power input sources down to 10mA
    • VINDPM automatically tracks battery voltage
    • Input Current Optimizer (ICO) maximizes input power without overloading adapters
  • Efficient battery operation with 7mΩ BATFET
  • Narrow VDC (NVDC) power path management
    • System instant-on with depleted or no battery
    • Battery supplement when adapter is fully loaded
  • Flexible autonomous or I2C-controlled modes
  • Integrated 12-bit ADC for voltage, current, and temperature monitoring
  • High accuracy
    • ±0.5% charge voltage regulation
    • ±5% charge current regulation
    • ±5% input current regulation
  • Safety
    • Liquid detection and corrosion mitigation (Patent Pending)
    • Thermal regulation and thermal shutdown
    • Input/system/battery overvoltage and overcurrent protection
    • Charging safety timer
  • High-efficiency 5A, 1.5MHz, synchronous switch mode buck charger for single cell battery
    • >90% efficiency down to 10mA output current from 5V input
    • Charge current up to 5A in 20mA steps
    • Charge termination from 30 to 1000mA in 10mA steps
    • Highly configurable JEITA profile for safe charging over temperature
  • Fully Integrated CC Controller with Dual Role Power (DRP), Try.SNK and Try.SRC
  • BATFET control to support shutdown, ship mode and full system reset
    • 1.5µA quiescent current in battery only mode
    • 0.15µA battery leakage current in ship mode
    • 0.1µA battery leakage current in shutdown mode
  • Supports USB On-The-Go (OTG) and SRC mode
    • Reverse mode with 3.84V to 9.6V output
    • Programmable current limit up to 3.2A
  • Supports a wide range of input sources
    • 3.9V to 18V input operating voltage range with 26V absolute max input voltage
    • Supports USB Type-C inputs, USB BC1.2, HVDCP, and Non-Standard Adapters
    • Supports IINDPM Range from 10mA to 3.2A
    • API (Alternate Power from Input) mode for low power input sources down to 10mA
    • VINDPM automatically tracks battery voltage
    • Input Current Optimizer (ICO) maximizes input power without overloading adapters
  • Efficient battery operation with 7mΩ BATFET
  • Narrow VDC (NVDC) power path management
    • System instant-on with depleted or no battery
    • Battery supplement when adapter is fully loaded
  • Flexible autonomous or I2C-controlled modes
  • Integrated 12-bit ADC for voltage, current, and temperature monitoring
  • High accuracy
    • ±0.5% charge voltage regulation
    • ±5% charge current regulation
    • ±5% input current regulation
  • Safety
    • Liquid detection and corrosion mitigation (Patent Pending)
    • Thermal regulation and thermal shutdown
    • Input/system/battery overvoltage and overcurrent protection
    • Charging safety timer

The BQ25640 is a highly-integrated 5A switch-mode battery charge management and system power path management device for single cell Li-Ion and Li-polymer batteries. The design is highly integrated with built-in current sensing, loop compensation, input reverse-blocking FET (Q1), switching FETs (Q2 and Q3), and battery FET (Q4) between system and battery. The device integrates a USB Type-C controller with Dual-Role Power with Try.SNK and Try.SRC support. The BQ25640 uses NVDC power path management, regulating the system slightly above the battery voltage without dropping below a configurable minimum system voltage. The low impedance power path optimizes efficiency, reduces battery charging time and extends battery life during discharging phase, and the ultra-low 0.15µA ship mode current extends battery shelf life.

The BQ25640 is a highly-integrated 5A switch-mode battery charge management and system power path management device for single cell Li-Ion and Li-polymer batteries. The design is highly integrated with built-in current sensing, loop compensation, input reverse-blocking FET (Q1), switching FETs (Q2 and Q3), and battery FET (Q4) between system and battery. The device integrates a USB Type-C controller with Dual-Role Power with Try.SNK and Try.SRC support. The BQ25640 uses NVDC power path management, regulating the system slightly above the battery voltage without dropping below a configurable minimum system voltage. The low impedance power path optimizes efficiency, reduces battery charging time and extends battery life during discharging phase, and the ultra-low 0.15µA ship mode current extends battery shelf life.
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* Data sheet BQ25640 I2 C Controlled Single Cell 5A Buck Charger with USB-C Detection datasheet PDF | HTML 06 Mar 2026
EVM User's guide BQ25640 Evaluation Module PDF | HTML 09 Mar 2026

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