Intersil Corp. is introducing a new family of PWM (pulse width modulation) controllers that control microprocessor core voltage regulation by driving 4-6 synchronous-rectified buck channels in parallel. Microprocessor loads can generate load transients with extremely fast edge rates.
The ISL6326 utilizes Intersil's proprietary active pulse-positioning(APP=99) and adaptive phase alignment (APA=99) modulation scheme to achieve a fast transient response with the fewest possible output capacitors. APP and APA are pulse width and positioning modulation techniques designed to speed up load transient response, reducing the need for external bulk output capacitors required to supply stored energy to the CPU (central processing unit) during load transients. A unity gain, differential amplifier is provided for remote voltage sensing. Any potential difference between remote and local grounds can be completely eliminated using the remote-sense amplifier. Eliminating ground differences improves regulation and protection accuracy.
The ISL6326 and ISL6326B are available now in 40-lead QFN packaging and are priced at $3.81 and $4.03 respectively. The ISL6327 is available now in a 48-lead QFN package and is priced at $4.58. All pricing is in 1,000-unit quantities.
