Intersil – Single Phase, R4-Based Digital Hybrid PWM Controllers: ISL68200/1 with a PMBus

The ISL68200 and ISL68201 are single phase Digital Hybrid PWM Controllers with PMBus built around Intersil’s proprietary R4 control loop technology. The ISL68200 features integrated MOSFET drivers for driving external MOSFETs directly. The ISL68201 has a PWM output, allowing the controller to be paired with Intersil’s expanding portfolio of DrMOS power stages.

Both controllers support a wide 4.5V to 24V input voltage range, and a 0.5V to 5.5V output voltage range. Switching frequency is adjustable from 300kHz to 1.5MHz. An optional light-load efficiency mode is available, allowing for high efficiency operation across a wide range of load currents. An included PMBus interface enables user monitoring of device telemetry (VIN, VOUT, IOUT and temperature), fault reporting and on the fly change of the output voltage.

Device configuration is done using external resistors, following a design flow familiar to many design engineers. To speed development and debug, any parameter configured with resistors can also be modified using the PMBus interface in real time. This allows quick design modifications during board bring up without the need to use a soldering iron, thus speeding up the process.

The R4 modulator technology used in this family of devices is compensation free and offers industry leading transient performance. This unique architecture allows the ISL68200/1 to meet the most stringent transient requirements of the latest FPGAs, Network Processors and custom ASICs on the market with minimum amount of output capacitance.

Both the ISL68200 and ISL68201 are fully compatible with Intersil’s PowerNavigator software tool. A full design tool for each device is built into PowerNavigator, enabling component selection, efficiency curve generation and full schematic creation in one tool.


  • Full integration with Intersil DrMOS power stages
  • Single supply operation
  • Built-in 5V LDO for external driver supply voltage
  • 300kHz to 1.5MHz switching frequency


  • High efficiency and high density POL digital power
  • FPGA, ASIC and memory supplies
  • Datacenter: servers, storage systems
  • Wired infrastructure: routers/switches/optical networking
  • Wireless infrastructure: base station