28V, 1A, Li-lon, Linear Battery Charger, with 10mA High Voltage LDO

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Product Description

The MP2631 is a linear, high performance single cell Li-Ion or Li-Polymer battery charger with 10mA LDO. By integrating high voltage input protection into the charger IC, the MP2631 can tolerate an input surge up to 28V. The internal 5V LDO can be used as a system watchdog supply to monitor charge status. The LDO is ON when the input voltage is greater than 3V and less than 7V, and remains ON when the MP2631 is in SHDN mode. When input is higher than 7.0V, the LDO output will be cut off from the input. When input is lower than 5V, the LDO will work in the dropout region. The device features constant current (CC) and constant voltage (CV) charging modes with programmable charge current (200mA to 1A), auto-recharge and trickle charge. MP2631 provides ACOK and charge status indications to the system. The OVP circuitry will automatically disconnect both charger and LDO from input when VIN exceeds 7V. For guaranteed safe operation, the MP2631 limits the die temperature to a preset value when the device is heated up due to limited PCB space. MP2631 is available in 10-pin 3mm x 3mm QFN package.

Product Features

  • Complete Solution for Charging Single-Cell Li-Ion Battery
  • Input Surge Protection Up to 28V
  • 5V LDO output
  • 3V to 7V Input Operating Range
  • Programmable Charge Current: 200mA to 1A
  • Termination and auto-recharge
  • 0.75% VBATT Accuracy over Temperature
  • <1µA Battery Reverse Curren
  • Automatic die temperature limiting
  • Fault and Charge Status Indicators
  • External Soft-Start to Control Inrush Current
  • 3mm x 3mm QFN Package


  • Icharge (max) (A)1
  • Vbatt (max) (V)4.2
  • Operating Vin (max) (V)6.7
  • Absolute Vin (max) (V)28
  • Vbatt (min) (V)4.2
  • NTC MonitoringNo
  • Operating Vin (min) (V)2.5
  • Special FeaturesIntegrated LDO, Thermal Regulation, USB Compatible
  • Cells1
  • GradeCatalog
  • Battery TypeLi-Ion, Li-Polymer
  • Control InterfaceStandalone
  • TimerNo
  • Power PathNo
  • USB ModeNo
  • PackageQFN-10 (3x3)
Quality Policy, Certificates & Reliability Reports
All MPS parts are lead-free, halogen-free and adhere to the RoHS directive. See Environmental section for details.