PWM controller optimises DC/DC convertor design

Edited by the Electronicstalk editorial team May 20, 2004

The new Endura ISL6564 is billed as the industry's most advanced four-phase synchronous-buck PWM controller.

The new Endura ISL6564 is billed as the industry's most advanced four-phase synchronous-buck PWM controller.

This 6bit VID (voltage identification) controller delivers the industry's lowest VID voltage range, tightest phase balance, most precise voltage regulation, only self-clocked VID (no external clock required), output current indicator, and many more features that improve performance, save space and reduce costs.

Its full range of integrated features, use of up to four phases and a choice of either lower-mosfet on-resistance or inductor DC resistance (DCR) current sensing make the ISL6564 the industry's most flexible controller that brings high performance to a very wide range of applications where high-current voltage conversion and regulation is required.

Such applications include powering CPUs in computers, servers and data storage systems along with powering ASICs, FPGAs and systems in consumer, industrial, medical and communications equipment.

The ISL6564 multiphase PWM controller, combined with Intersil HIP660XB or ISL661X mosfet drivers or Intersil ISL6571 integrated power stages, forms a complete high-performance high-current power solution that provides high power efficiency and cost savings.

With a switching frequency range up to 1.5MHz per phase, an ISL6564-based voltage regulator requires fewer components and less PCB area in DC/DC convertor applications.

Dynamic VID technology allows seamless on-the-fly VID changes that adjust the output voltage in tiny millivolt increments.

The self-clocked dynamic VID feature is an industry first.

A unity-gain differential amplifier is provided for remote voltage sensing.

The threshold-sensitive enable input is available to accurately coordinate the start up of the ISL6564 with any other voltage rail.

The suggested resale price in 100 to 999-unit quantities for the ISL6564CR is $1.95 each.

ICs are available on tape and reel.