The ISL9237 is a buck-boost Narrow Output Voltage DC (NVDC) charger utilizing Intersil’s advanced R3™ Technology to provide high light-load efficiency, fast transient response and seamless DCM/CCM transitions for a variety of mobile and industrial applications. In Charge mode, the ISL9237 takes input power from a wide range of DC power sources (conventional AC/DC charger adapters, USB PD ports, travel adapters, etc. ) and safely charges battery packs with up to 3 cells in a series configuration. ISL9237 supports On-the-Go (OTG) function for 2- and 3-cell battery applications. When OTG function is enabled, the ISL9237 operates in the reverse Buck mode to provide 5V at the USB port. As a NVDC topology charger, it also regulates the system output to a narrow DC range for stable system bus voltage. The system power can be provided from the adapter, battery or a combination of both. The ISL9237 can operate with only a battery, only an adapter or both connected. For Intel IMVP8 compliant systems, the ISL9237 includes PSYS functionality, which provides an analog signal representing total platform power. The PSYS output will connect to a wide range of Intersil IMVP8 core regulators to provide an IMVP8 compliant power domain function. The ISL9237 has serial communication via SMBus/I2C that allows programming of many critical parameters to deliver a customized solution. These programming parameters include, but are not limited to: Adapter current limit, charger current limit, system voltage setting and trickle charging current limit.


  • Buck-boost NVDC charger for 1-, 2- or 3-cell Li-ion batteries
  • Input voltage range 3.2V to 23.4V (no dead zone)
  • System output voltage 2.4V to 13.824V
  • System power monitor PSYS output, IMVP-8 compliant
  • Up to 1MHz switching frequency
  • LDO output for charger VDD
  • Adapter current monitor (AMON)
  • Battery discharging current monitor (BMON)
  • PROCHOT# open-drain output, IMVP-8 compliant
  • Allows trickle charging of depleted battery
  • Optional ASGATE FET control
  • Ideal diode control in Turbo mode
  • Supports OTG function for 2- and 3-cell batteries
  • SMBus and auto-increment I2C compatible
  • Two-level adapter current limit available
  • Pb-free (RoHS compliant)
  • Package 4x4 32 Ld QFN

tuneProduct Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active QFN Tube 75
Active QFN Reel 6000
Active QFN Reel 250
Active QFN Reel 1000


Title language Type Format File Size Date
Datasheets & Errata
star ISL9237 Datasheet Datasheet PDF 1.58 MB
User Guides & Manuals
ISL9237EVAL2Z User Guide Manual - Development Tools PDF 1.96 MB
Application Notes & White Papers
Five Easy Steps to Create a Multi-Load Power Solution White Paper PDF 846 KB
Understanding USB-C Buck-Boost Battery Charging 简体中文 White Paper PDF 439 KB
Inside a New Architecture for USB Type-C Applications White Paper PDF 320 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 327 KB
PCN21005 - Alternate assembly facility of the listed Renesas DFN / QFN / TDFN / TQFN packaged products Product Change Notice PDF 158 KB
PCN17048A - Datasheet Change for the Listed Intersil Charger Products - Cancelled Product Change Notice PDF 226 KB
PCN17048 - Datasheet Change for the Listed Intersil Charger Products Product Change Notice PDF 222 KB
PA16047 - Datasheet Specification Change for the listed ISL9237* Products Product Advisory PDF 172 KB


Title language Type Format File Size Date
ISL9237 Evaluation Kit Software Library ZIP 290.80 MB
ISL9237EVAL2Z Design Files PCB Design Files ZIP 1.88 MB

memoryBoards & Kits

Part Number Title Type Company
ISL9237EVAL2Z Buck-Boost Narrow VDC Battery Charger with SMBus Interface and USB OTG Evaluation Board Evaluation Renesas