The ISL95833B Pulse Width Modulation (PWM) controller IC provides a complete solution for IMVP-7/VR12™ compliant microprocessor and graphic processor core power supplies. It provides the control and protection for two Voltage Regulators (VRs). The first VR, typically for VCORE, incorporates 1 integrated driver and can operate in 2- or 1-phase configurations. The second VR, typically for graphics, is a single phase regulator incorporating an integrated driver. The two VRs share a serial control bus to communicate with the CPU and achieve lower cost and smaller board area compared with the two-chip approach. Both VRs utilize Intersil's Robust Ripple Regulator R3 Technology™. The R3 modulator has numerous advantages compared to traditional modulators, including faster transient response, variable switching frequency during load transients, and improved light load efficiency due to its ability to automatically change switching frequency. The ISL95833B has several other key features. Both outputs support either DCR current sensing with a single NTC thermistor for DCR temperature compensation, or more precise resistor current sensing if desired. Both outputs come with remote voltage sense, programmable VBOOT voltage, IMAX, and switching frequency, adjustable overcurrent protection and separate Power-Good signals.


  • Serial data bus
  • Dual outputs:
  • Configurable 2- or 1-phase for the 1st output using one integrated gate driver
  • 1-phase for the 2nd output using an integrated gate driver
  • R3™ Modulator
  • Excellent transient response
  • High light load efficiency
  • 0.5% system accuracy over-temperature
  • Supports multiple current sensing methods
  • Lossless inductor DCR current sensing
  • Precision resistor current sensing
  • Differential remote voltage sensing
  • Programmable VBOOT voltage at start-up
  • Resistor programmable IMAX and switching frequency (400kHz ~ 600kHz) for both outputs
  • Adaptive body diode conduction time reduction


  • IMVP-7/VR12 compliant computers

Product Options

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

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
ISL95833B Datasheet Datasheet PDF 1.44 MB
ISL95833B Data Short Short Form Datasheet PDF 195 KB
Application Notes & White Papers
Five Easy Steps to Create a Multi-Load Power Solution White Paper PDF 846 KB
AN1681: Grounding Techniques Application Note PDF 509 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
PCN21005 - Alternate assembly facility of the listed Renesas DFN / QFN / TDFN / TQFN packaged products Product Change Notice PDF 158 KB
PCN14008 - Alternate Manufacturing Facilities for Assembly of the Listed Intersil DFN/QFN/TQFN Packaged Products - Advanced Semiconductor Engineering (ASECL) - Chung-Li , Taiwan and Carsem (CAS) - Ipoh, Malaysia 4BA and 4BB Product Change Notice PDF 146 KB
PCN13060 - Test Site Change for the Listed Intersil Products Product Change Notice PDF 223 KB
PA16093 - Intersil Device Procurement Status Change - Active NCNR - ISL95833* Product Advisory PDF 234 KB