The ISL68201-99135DEMO1Z is a 6-layer board used to demonstrate a compact 13mm x 13mm 20A synchronous buck converter. Transient performance, fault protections, DC/AC regulations, PMBus programming, power sequencing, margining, and other features can be evaluated using this board.

The ISL68201 is a single-phase synchronous buck PWM controller featuring Renesas' proprietary R4™ Technology, which has extremely fast transient performance, accurately regulated frequency control and all internal compensation. The ISL68201 supports a wide 4.5V to 24V input voltage range and a wide 0.5V to 5.5V output range. It includes programmable functions and telemetries for easy use and high system flexibility using an SMBus, PMBus or I2C interface.

The ISL99135B is a DrMOS power stage compatible with Renesas' 5V PWM controllers (such as ISL6398, ISL637x, ISL633x, ISL636x, ISL9585x, and ISL68201). They use a DCR sensing network and associated thermal compensation. Light-load efficiency is supported via a dedicated FCCM control pin. An industry leading thermally enhanced 3.5x5 QFN 24 Ld package allows minimal overall PCB real estate.

The PMBus dongle (ISLUSBEVAL1Z), i.e., USB-to-PMBus™ adapter, and USB cable are included in the demonstration kit. Download the PowerNavigator™ software to evaluate the full PMBus functionality of the ISL68201.


  • 16A synchronous buck converter with PMBus control
  • On-board transient load with adjustable di/dt
  • Configurable through resistor pins
  • Cascadable PMBus connectors
  • Integrated LDOs for single rail solution
  • Enable switch and power-good indicator
  • All ceramics solution with SP capacitor footprint option


  • High-efficiency and high-density VRM and VRD
  • Core, graphic and memory regulators for microprocessors
  • High-density VR for server, networking and cloud computing
  • POL DC/DC converters and video gaming consoles

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL99125B, ISL99135B Datasheet Datasheet PDF 840 KB
User Guides & Manuals
PowerNavigator User Guide for POL Manual PDF 4.68 MB
Production Configuration Utility User Guide Manual PDF 714 KB
ISL68201-99135DEMO1Z User Guide Manual PDF 1.95 MB
Production Configuration Utility v5.4.139 Software ZIP 120.25 MB
PowerNavigator™ Software v5.4.139 Software ZIP 96.49 MB