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DATASHEET

Single-Phase R4™ Digital Hybrid PWM Controller with

ISL68201

The ISL68201 is a single-phase, synchronous buck PWM

controller featuring Intersil’s proprietary R4™ Technology. It

supports a wide 4.5V to 24V input voltage range and a wide

0.5V to 5.5V output range. Integrated LDOs provide controller

bias voltage, allowing for single supply operation. The

and fault reporting.

Intersil’s proprietary R4™ control scheme has extremely fast

transient performance, accurately regulated frequency control

and all internal compensation. An efficiency enhancing PFM

mode can be enabled to greatly improve light-load efficiency.

The ISL68201’s series bus allows for easy R4™ loop

optimization, resulting in fast transient performance over a

wide range of applications, including all ceramic output filters.

The ISL68201 has four 8-bit configuration pins, which provide

etc.) without the need for built-in NVM memory. This results in

a design flow that closely matches traditional analog

controllers, while still offering the design flexibility and feature

also features remote voltage sensing and completely eliminates

any potential difference between remote and local grounds. This

improves regulation and protection accuracy. A precision enable

input is available to coordinate the start-up of the ISL68201 with

other voltage rails, especially useful for power sequencing.

Applications

• High efficiency and high density POL digital power

• FPGA, ASIC and memory supplies

• Data center: servers, storage systems

• Wired infrastructure: routers/switches/optical networking

• Wireless infrastructure: base station

Related Literature

• UG068, “ISL68201-99140DEMO1Z User Guide”

Features

• Intersil’s proprietary R4™ Technology

- Linear control loop for optimal transient response

- Variable frequency and duty cycle control during load

transient for fastest possible response

- Inherent voltage feed-forward for wide range input

• Input voltage range: 4.5V to 24V

• Output voltage range: 0.5V to 5.5V

• ±0.5% DAC accuracy with remote sense

• Support all ceramic solutions

• Integrated LDOs for single input rail solution

• 256 boot-up voltage levels with a configuration pin

• Eight switching frequency options from 300kHz to 1.5MHz

• PFM operation option, compatible with ISL99140 for

improved light-load efficiency

• Start-up into precharged load

• Precision enable input to set higher input UVLO and power

sequence as well as fault reset

• Power-good monitor for soft-start and fault detection

• Comprehensive fault protection for high system reliability

- Over-temperature protection

- Output overcurrent and short-circuit protection

- Output overvoltage and undervoltage protection

- Open remote sense protection

• Compatible with 5V or 3.3V PWM input DrMOS or Smart

Power Stage (SPS)

• Compatible with Intersil’s PowerNavigator™ software

TABLE 1. SINGLE-PHASE R4™ DIGITAL HYBRID PWM CONTROLLER OPTIONS

PART

NUMBER

INTEGRATED

DRIVER

PWM

OUTPUT

INTERFACE

COMPATIBLE DEVICES

ISL68200

Yes

No

Yes

Discrete MOSFETs or Dual Channel MOSFETs

ISL68201

No

Yes

Yes

Intersil Power Stages:

ISL99140

Intersil Drivers:

ISL6596, ISL6609, ISL6627, ISL6622, ISL6208

March 7, 2016

FN8696.1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

Intersil (and design), R3 Technology, R4 Technology and PowerNavigator are trademarks owned by Intersil Corporation or

one of its subsidiaries.All other trademarks mentioned are the property of their respective owners.