Intersil Improves Transient Response and Reduces Output Capacitors

(Product News, 13 Sep 2006)

Intersil Corp. has introduced a family of four-phase synchronous PWM (pulse width modulation) buck controllers. These devices achieve the transient response with the fewest output capacitors and provide integrated and 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 the fastest transient response with the fewest output capacitors over competitive designs. The 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 ISL6312/12A/22 also integrate three MOSFET (metal oxide semiconductor field effect transistor) drivers and a PWM output for a fourth external MOSFET driver. This configuration provides a power management solution for desktops, workstations, servers, industrial PC motherboards, routers, 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.

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