4.5A, I2C-Controlled, Single-Cell USB/Adaptor Charger with Narrow VDC Power-Path Management and USB OTG with Output SCP Latch
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Product Description

The MP2624A is a 4.5A, highly integrated, switching-mode, battery charger IC for single-cell Li-ion or Li-polymer batteries. The MP2624A supports NVDC architecture with power path management and is suitable for various portable applications. Its low impedance power path optimizes efficiency, reduces battery charging time, and extends battery life. The I2C serial interface with charging and system settings allows the device to be controlled flexibly.
The MP2624A supports a wide range of input sources, including standard USB host ports and high-power wall adapters. The MP2624A detects the input source type according to the USB Battery Charging Spec 1.2 (BC1.2) and then informs the host to set the proper input current limit. In addition, the MP2624A supports USB On-The-Go operation by supplying 5.0V with current up to 2.0A.
The power-path management regulates the system voltage slightly above the set maximum voltage between the battery voltage and the I2C programmable lowest voltage level. With this feature, the system is able to operate even when the battery is depleted completely or removed. When the input source current or voltage limit is reached, power path management reduces the charge current automatically to meet the priority of the system power requirement. If the system current continues increasing, even when the charge current is reduced to zero, the supplement mode allows the battery to power the system together with the input power supply simultaneously.
The MP2624A is available in a QFN-22 (3mmx4mm) package.

Product Features

  • High-Efficiency 4.5A 1.7MHz Buck Charger and 1.7MHz 2.0A Boost Mode to Support OTG
  • 94% Efficiency at 2A, 92% at 4A
  • Fast Charge Time By Battery Path Impedance Compensation 
  • 94% Efficiency at 5V, 1.2A OTG
  • Selectable OTG Current Outputs
  • 3.9V to 7.0V Operating Input Voltage Range
  • Highest Battery Discharge Efficiency with 10mΩ Battery Discharge MOSFET up to 9A
  • Narrow System Bus Voltage Power Path Management
  • Instant On Works with No Battery or Deeply Discharged Battery 
  • Ideal Diode Operation in Battery Supplement Mode
  • Constant-Off-Time Control to Reduce Charging Time under Lower Input Voltages
  • High Accuracy of Charging Parameter
  • I2C Port for Flexible System Parameter Setting and Status Reporting 
  • Full DISC Control to Support Shipping Mode and System Restart 
  • High Integration
  • Fully Integrated Power Switches 
  • Built-In Robust Charging Protection
  • Built-In Battery Disconnection Function
  • High Accuracy
  • ±0.5% Charge Voltage Regulation
  • ±5% Charge Current Regulation
  • ±5% Input Current Regulation
  • ±2% Output Regulation in Boost Mode
  • Safety
  • Battery Temperature Sensing for Charge Mode 
  • Battery Charging Safety Timer
  • Thermal Regulation and Thermal Shutdown
  • Input/System Over-Voltage Protection 
  • MOSFET Over-Current Protection
  • Charging Operation Indicator
  • Thermal Limiting Regulation on Chip
  • Tiny QFN-22 (3mmx4mm) Package


  • Operating Vin (min) (V)3.6
  • Operating Vin (max) (V)7
  • Absolute Vin (max) (V)20
  • Cells1
  • GradeCatalog
  • NVDCYes
  • Vbatt (max) (V)4.425
  • Vbatt (min) (V)3.48
  • Battery TypeLi-Ion, Li-Polymer
  • Iotg (A)1.3
  • Iin (max) (A)3
  • Icharge (max) (A)4.5
  • Votg (max) (V)5
  • TopologyBuck
  • fsw (kHz)1700
  • Control InterfaceI2C
  • Special FeaturesBattery OCP, Battery UVP, Input Current Regulation, JEITA Batt NTC Monitor, Narrow Voltage Power Path, Thermal Regulation, USB BC1.2 Detection, USB Compatible, USB OTG (Boost Mode), VIN Regulation
  • PackageQFN-22 (3x4)
  • TimerYes
  • NTC MonitoringYes
  • EN ControlYes
  • Charge Status Yes
  • Idis (A)6