The ISL95538B is a buck-boost Narrow Output Voltage DC (NVDC) charger. The ISL95538B provides the NVDC charging function, system bus regulation, and protection features for tablet, Ultrabook, and notebook platforms. The advanced Renesas R3™ Technology provides high light-load efficiency and fast transient response. In Charging mode, the ISL95538B takes input power from a wide range of DC power sources (such as conventional AC/DC charger adapters, USB PD ports, travel adapters) and safely charges battery packs with up to 4-series cell Li-ion batteries. As an NVDC topology charger, the ISL95538B 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 ISL95538B can operate with only a battery, an adapter, or both connected. The ISL95538B supports reverse buck, boost, or buck-boost operation to the input port from 2- to 4-cell batteries. The ISL95538B has serial communication using SMBus/I2C that allows programming of many critical parameters to deliver a customized solution.


  • Buck-boost NVDC charger for 1-, 2-, 3-, or 4-cell Li-ion batteries
  • Input voltage range 3.2V to 23.4V (no dead zone)
  • System output voltage 3V to 18.304V
  • Autonomous charging option (automatic end of charge and recharge)
  • Up to 1MHz switching frequency
  • Adapter current and battery current monitor (AMON/BMON)
  • PROCHOT# open-drain output, IMVP compliant
  • Allows trickle charging of depleted batteries
  • Ideal diode control in Turbo mode
  • Reverse buck, boost, and buck-boost operation from battery
  • Two-level adapter current limit available
  • Battery Ship mode option
  • SMBus and auto-increment I2C compatible
  • 4mm x 4mm 32 Ld TQFN package


PDF 209 KB Datasheet - Short-form
PDF 5.51 MB 日本語 Brochure
PDF 169 KB Product Change Notice
PDF 326 KB Product Change Notice
PDF 2.53 MB Datasheet
PDF 439 KB 简体中文 White Paper
PDF 320 KB White Paper
PDF 226 KB Product Change Notice
PDF 222 KB Product Change Notice
PDF 509 KB Application Note
PDF 397 KB Application Note
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Design & Development