The ISL6388 is a smart and smallest 6-Phase Green PWM controller, designed to be compliant to Intel VR12. 5/VR12 specifications and control the microprocessor core or memory voltage regulator. It includes programmable functions and telemetries for easy use, system flexibility and over-clocking applications using SMBus, PMBus, or I2C interface, which is designed to be conflict free with CPU’s SVID bus and to program NVM banks up to 8 different compensations and system parameters. This minimizes external components and significantly reduces design complexity and PCB area, and simplifies the manufacturing process. The ISL6388 utilizes Renesas' proprietary Advanced Linear EAPP (Enhanced Active Pulse Positioning) Digital control scheme to achieve the extremely fast linear transient response with fewer output capacitors and overcomes many hurdles of the traditional digital approach, which uses non-linear, discrete control method for both voltage loop and current balance loop and runs into beat frequency oscillation and non-linear response. The ISL6388 accurately monitors the load current via the IMON pin and reports this information via the IOUT register to the microprocessor, which sends a PSI# signal to the controller at low power mode via SVID bus. The controller enters 1- or 2-phase operation in low power mode (PSI1); in the ultra-low power mode (PSI2, PSI3), it operates in single phase with diode emulation option. In low power modes, the magnetic core and switching losses are significantly reduced, yielding high efficiency at light load. After the PSI# signal is de-asserted, the dropped phase(s) are added back to sustain heavy load transient response and efficiency. In addition, the ISL6388 features auto-phase shedding to optimize the efficiency from light to full load for Greener Environment without sacrificing the transient performance. The ISL6388 senses the output current continuously by a dedicated current sense resistor or the DCR of the output inductor. The sensed current flows through a digitally programmable 1% droop resistor for precision load-line control. Current sensing circuits also provide the needed signals for channel-current balancing, average overcurrent protection and individual phase current limiting. The TM pin senses an NTC thermistor’s temperature, which is internally digitized for thermal monitoring and for integrated thermal compensation of the current sense elements of the regulator. The ISL6388 features remote voltage sensing and completely eliminates any potential difference between remote and local grounds. This improves regulation and protection accuracy. The threshold-sensitive enable input is available to accurately coordinate the start-up of the ISL6388 with other voltage rails.


  • Intel VR12.5/VR12 compliant for core and memory
  • Programmable IMAX, TMAX, BOOT, DVID rate, address
  • SMBus/PMBus/I2C compatible
  • Up to 1.5MHz bus interface with SVID conflict free
  • NVM to store up to 8 configurations with programmable frequency, droop, auto, faults (OCP, UVP, CFP), etc.
  • No firmware required and hassle free with checksum
  • Advanced Linear EAPP Digital control scheme (patented)
  • Digitally programmable compensation
  • Auto phase shedding option for greener environment
  • Variable frequency control during load transients to reduce beat frequency oscillation
  • Linear control with evenly distributed PWM pulses for better phase current balance during load transients
  • Voltage feed-forward and ramp adjustable options
  • High frequency and PSI compensation
  • Active phase adding and dropping with diode emulation scheme for enhanced light load efficiency
  • Phase doubler and coupled-inductor compatibility
  • Differential remote voltage sensing with ±0.5% accuracy
  • Programmable 1- or 2-phase operation in PSI1 mode
  • Programmable slew rate of fast dynamic VID with dynamic VID compensation (DVC)
  • Support 5V PWM or 3.3V PWM DrMOS and driver
  • Zero current shutdown with ISL6627
  • Precision resistor or DCR differential current sensing
  • Accurate load-line (Droop) programming and control
  • Accurate current monitoring and channel-current balancing with calibration capability
  • True input current sensing for catastrophic failure protection
  • Average overcurrent protection and channel-current limiting
  • High common mode current sense input (VCC-1.5V)
  • Open sensing and single point of loop failure protection
  • Thermal monitoring and integrated compensation
  • 1- to 6-Phase option and up to 2MHz per phase
  • Start-up into pre-charged load
  • Pb-Free (RoHS Compliant) 40 Ld 5x5 Plastic Package


  • Core and memory for Intel VR12/VR125 based processor
  • High performance server core or memory rail
  • High performance graphic rail
  • High-end desktop with over-clocking option


器件号 Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active TQFN Tube 60
Active TQFN Reel 6000
Active TQFN Tube 60
Active TQFN Reel 6000


文档标题 language 类型 文档格式 文件大小 日期
star ISL6388 Data Short Datasheet - Short-form PDF 166 KB
ISL6388 Datasheet 数据手册 PDF 2.46 MB
ISLUSBEVAL1Z User's Manual 手册 - 开发工具 PDF 257 KB
PowerNavigator User Guide for Digital Multiphase 手册 - 开发工具 PDF 5.52 MB
Production Configuration Utility User Guide 指南 PDF 714 KB
应用指南 & 白皮书
Five Easy Steps to Create a Multi-Load Power Solution 白皮书 PDF 846 KB
AN1681: Grounding Techniques 应用文档 PDF 509 KB
AN1684: Nonideality of Ground 应用文档 PDF 397 KB
PCN20029A - Alternate bond wire material and assembly facility of the listed Renesas QFN packaged products 产品变更通告 PDF 327 KB


文档标题 language 类型 文档格式 文件大小 日期
PowerNavigator™ Software v5.4.139 软件和工具 - 软件 ZIP 96.49 MB
Production Configuration Utility v5.4.139 Software & Tools - Other ZIP 120.25 MB


文档标题 类型 Description Company
PowerNavigator Software Software Package Renesas' PowerNavigator™ software allows simple configuration and monitoring of multiple Digital-DC devices using a PC with a USB interface. Renesas