International Rectifier's intelligent multiphase buck PWM controllers are the key component in high frequency voltage regulator (VR) designs for powering today’s high performance microprocessors (CPUs) and graphics processors (GPUs). They are fully compliant with industry standard processor vendor VR specifications.

• Intel VR12
• AMD CPU (SVI,PVI)
• Graphics (GPU)
• Intel VR11.1

   Intel VR12 Controllers

International Rectifier's VR12 controllers are fully vetted controllers that provide the extremely tight regulation, sophisticated interface, and highly digital content required to meet the emerging VR12 products from Intel. These dual-voltage controllers are offered from 2 phases to 8 as well as single voltage products for DDR memory applications. International Rectifier’s unique efficiency shaping features insure customers have the highest possible efficiency in their solution. All controllers have overclocking capability to be used in high performance motherboards, or to offer high performance operation in servers. Full state of the art current, voltage, temperature and phase balance protection are included as well.

   AMD CPU Controllers

International Rectifier AMD CPU controllers have been implemented in server and desktop applications and have brought high efficiency savings, overclocking, and very accurate digital control to AMD solutions. All controllers support serial (SVI) interface protocol, and several support parallel bit (PVI) protocol. These dual-voltage controllers are offered from 2 phases to 8 as well as single voltage products for DDR memory applications. International Rectifier’s unique efficiency shaping features insure customers have the highest possible efficiency in their solution. All controllers have overclocking capability to be used in high performance motherboards, or to offer high performance operation in servers. Full state of the art current, voltage, temperature and phase balance protection are included as well.

*For new designs, the IR3541 or CHL8325 are recommended

**The IR3538 and CHL8338 support both SVI serial as well as PVI parallel AMD interface support

   Graphics Processors (GPU) Controllers

International Rectifier Graphics Multiphase controllers are ideal to power high performance Graphic processors, as well as associated DDDR memory. International Rectifier offers both single and dual voltage controllers to manage cost, space and performance. International Rectifier GPU controllers have unique features such as multi-pin VID control, current steering to manage PCMIA and connector current limits, two-level current protection and much more. These controllers are found on mainstream, performance and enthusiast class graphics cards in desktop, server, notebook and High Performance Computing (HPC) environments

   Intel VR11.1 Controllers

International Rectifier VR11.1 controllers have been proven in some of the highest performance motherboards and servers in the market. These products introduced International Rectifier's Dynamic Phase control features – the first in the industry to be able to both shed phases to save power, and add phases under proprietary digital control, when CPU transient currents are presented. These controllers are ideal for DDR memory as well.