Intersil Announces New Family of Synchronous PWM Buck Controllers

Intersil Corp. introduced a new family of four-phase synchronous PWM (pulse width modulation) buck controllers. These devices achieve fast transient response with few output capacitors and provide an integrated and cost-efficient computing power management solution.

The ISL6312, ISL6312A and ISL6322 provide a complete, integrated precision voltage regulation system for advanced Intel VR10/11(Intel Core 2 Duo and Intel Core 2 Extreme) and AMD AM2 5/6-bit microprocessors. This family features programmable VID (voltage identification) codes for Intel and AMD DAC (digital-to-analog converter) tables.

These devices use Intersil's proprietary active pulse positioning (APP™) and adaptive phase alignment (APA™) modulation schemes to achieve fast transient response with few output capacitors over competitive designs. APP and APA are pulse width and positioning modulation techniques that speed up load transient response and reduce the need for external bulk output capacitors required to supply stored energy to the CPU (central processing unit) during abrupt changes in line voltage and load current.

The devices feature integrated MOSFETs that save cost and board space; all-in-one VID for simplified design of Intel and AMD processors; fast load transient response; adaptive phase alignment for fast load transient response to severe load turn-on; active pulse positioning for fast response to high slew rate load transients; and fully differential inductor DCR current sensing for individual channel and average overcurrent protection. The devices are targeted toward desktops, workstations, and servers; single board motherboards; industrial PC motherboards; routers and switches; and voltage regulator modules.

The ISL6312, ISL6312A, and ISL6322 are available now in space-saving, 48-lead, 7 x 7 QFN packages with prices beginning at $6.67 each and ranging to $7.42 each in 1,000-piece quantities.