The ISL9301 is a fully integrated high input voltage single-cell Li-ion battery charger with power path management function. This charger performs the CC/CV charge function required by Li-ion batteries. The charger accepts an input voltage up to 28V but is disabled when the input voltage exceeds 10.5V OVP threshold. The 28V rating eliminates the overvoltage protection circuit required in a low-voltage charger. The charge current and the end-of-charge (EOC) current are programmable with external resistors. When the battery voltage is lower than 2. 8V, the charger preconditions the battery with 16% of the programmed charge current. When the charge current reduces to the programmable EOC current level during the CV charge phase, the EOC indicator (CHG) will toggle to logic HIGH to indicate the end-of-charge condition.

The charger will continue to charge until the user-programmed timeout interval has elapsed, then the charger is terminated. The ISL9301 uses separate power paths to supply the system load and charge the battery. This feature allows the system to immediately operate with a completely discharged battery. This feature also allows the charge to terminate when the battery is full while continuing to supply the system with the input source, thus minimizing unnecessary charge/discharge cycles and improving the battery life. Two indication pins (PPR and CHG) allow simple interface to a microprocessor or LEDs.


  • Complete Charger for Single-Cell Li-ion/Polymer Batteries
  • Power Path Management Optimize Charge and System Currents
  • Intelligent Timeout Interval Based on Actual Charge Current
  • Integrated Disconnect Switch to Disconnect the Battery
  • 1% Charger Output Voltage Accuracy
  • Programmable Charge Current
  • Programmable End-of-Charge Current
  • Charge Current Thermal Foldback for Thermal Protection
  • Trickle Charge for Fully Discharged Batteries
  • 28V Maximum Voltage at VIN pin
  • Power Presence and Charge Indications
  • Ambient Temperature Range: -40°C to +85°C
  • 10 Ld 3x3 DFN Package
  • Pb-Free (RoHS Compliant)


  • Mobile Phones
  • Blue-Tooth Devices
  • PDAs
  • MP3 Players
  • Stand-Alone Chargers
  • Other Handheld Devices


Title language Type Format File Size Date
star ISL9301 Datasheet
PDF 616 KB
AN1681: Grounding Techniques
Application Note
PDF 509 KB
AN1684: Nonideality of Ground
Application Note
PDF 397 KB
PCN20029A - Alternate bond wire material and assembly facility of the listed Renesas QFN packaged products
Product Change Notice
PDF 326 KB
PCN15046 - Wafer Fabrication Site Change for Listed Intersil Products - Global Foundry P6 Process transfer to Palm Bay - Phase II
Product Change Notice
PDF 398 KB
PCN10055 - Alternate Bond Wire Material for Assembly of the Listed Intersil DFN/QFN Packaged Products - STATS ChipPAC Malaysia
Product Change Notice
PDF 248 KB
Five Easy Steps to Create a Multi-Load Power Solution
White Paper
PDF 846 KB


memoryBoards & Kits

Part Number Title Type Company
ISL9301EVAL1Z High Input Voltage Charger With Power Path Management Evaluation Board Evaluation Renesas