Power & Power Management



The ISL68233 is a digital dual output multiphase (X+Y ≤ 5) PWM controller supporting PMBus V1.3/AVSBus interfaces. The controller can be configured to support any phase assignments up to a maximum of five phases across the two outputs (X and Y). For example, 4+1, 3+2, 3+1, 1+1, or a single output operation as a 5+0 configuration is supported. Increased power density and PMBus V1.3 interface support allows the ISL68233 to support any demanding power supply requirement.

The ISL68233 with AVSBus complements PMBus by providing a common high-speed interface to accelerate point-to-point communication between the controller and load to statically and dynamically control the processor voltage and deliver a balanced, power efficient design.

The ISL68233 uses the proprietary Renesas digital synthetic current modulation scheme to achieve the industry-best combination of transient response, ease of tuning, and efficiency across the full load range. Diode emulation and automatic phase add/drop features allow you to extract maximum efficiency from the converter regardless of load conditions. You can use the intuitive Renesas PowerNavigator™ software to configure and monitor the device.

With minimal external components, easy configuration, robust fault management, and highly accurate regulation capability, implementing a high-performance, multiphase regulator has never been easier.


  • Advanced linear digital modulation scheme
  • Auto phase add/drop with PFM mode for excellent load vs efficiency profile
  • Dual edge modulation with optional diode braking for faster transient response
  • Excellent VOUT transition performance
  • Zero latency synthetic current control for excellent high frequency current balance
  • Flexible phase assignment from 0 to 5 phases per output
  • Up to 2MHz switching frequency operation for high density designs
  • Differential remote voltage sensing supports ±0.5% closed-loop system accuracy over load, line, and temperature
  • Highly accurate current sensing for excellent load-line regulation and accurate OCP
  • Supports the full range of Renesas Smart Power Stage (SPS) devices
  • Comprehensive fault management enables high reliability systems
  • Pulse-by-pulse (per phase) and total output current limiting
  • Black Box status recording capability with first fault indicator
  • Intuitive configuration using PowerNavigator
  • SMBus/PMBus V1.3 compatible
  • Up to 16 user configurations stored in device Non-Volatile Memory (NVM)


  • DDR memory solutions
  • Artificial intelligence/accelerator cards (FPGA, ASIC)
  • Network equipment
  • Server/storage equipment
  • Telecom/datacom equipment
  • Point of load power supply (memory, DSP, ASIC, FPGA)


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Application Note
Application Note
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Product Advisory
Product Change Notice
Product Change Notice

Design & Development